WO1998036812A1

WO1998036812A1 - Dry interactive play structure having recirculating play media

Info

Publication number: WO1998036812A1
Application number: PCT/US1998/005331
Authority: WO
Inventors: Rick A. Briggs
Original assignee: Briggs Rick A
Priority date: 1997-02-21
Filing date: 1998-02-20
Publication date: 1998-08-27
Also published as: CA2282026A1; US6264202B1; AU6704298A; CA2282026C

Abstract

An interactive play system (100) and structure are provided in which a plurality of interactive play elements (200, 203, 220, 230, 240, 250, 270, 280, 290, 300, 310, 320) are provided for creating various desired effects utilizing soft foam balls (104) or other suitable 'dry' play media. In one embodiment the interactive play system (100) comprises a multi-level support structure (102) on which the interactive play elements are disposed. These allow play participants to create desired play effects using a fun and familiar dry play media. Some of the play elements (240) may be multi-order play elements in that they receive play media from a first effect (246) to create yet another effect. Various automated and/or play-participant-operated conveyers and play media collection and return mechanisms (330, 332, 350, 360, 370, 380, 400, 420, 600, 630, 670, 720, 749, 799, 800) are provided throughout the structure (100) for collecting and transporting play media (104) from a source, such as a collection basin (750), to the various interactive play elements.

Description

DRY IMTERACTIVE PLAY STRUCTURE

HAVING RECIRCULATING PLAY MEDIA

BACKGROUND OF THE INVENTION

1. Field of the Invention The present invention relates generally to the field of children's plaγ structures and, in particular, to interactive play structures for safely entertaining and educating young and intermediate age children and adults.

2. Description of the Related Art

Over the past decade there has been a steady proliferation of commercial play structures designed to meet the recreational needs of young families. Such plaγ structures can provide a safe and exciting alternative to more traditional parks and playgrounds. Participatory or interactive play structures, that is, play structures that allow play participants to actively participate in creating desired effects, are particularly desirable because of their widely recognized entertainment and educational benefits. See, for example, my U.S. Patent No. 5,194,048 and related design patent 0330,579. These patents first disclosed the concept of interactive or participatory play in the context of a water park attraction. Many large-scale successful commercial water parks now incorporate interactive play structures of the type disclosed in my U.S. Patent No. 5,194,048. Families that have patronized these commercial water parks have discovered for themselves the valuable entertainment and educational benefits that interactive play provides. Sales of admission tickets for many such commercial water parks have surged following the introduction of new play structures for facilitating interactive play. Commercial play structures may be adopted either for water use ("wet" play structures) or non-water use ("dry" play structures), as desired. The subject invention relates particularly to dry interactive play structures for either indoor or outdoor use. A typical dry play structure may include a padded framework and cushioned floors defining a variety of play elements or areas. Slides, tunnels, net bridges, and ladders may be used to interconnect the various play elements and play areas together so that play participants can traverse from one play element or area to the next.

On the other hand, there are certain unique aspects and desirable play dynamics of wet play structures which, heretofore, have not been satisfactorily met by their drγ counterparts. For example, an especially exciting and entertaining play activity supported by a wet play structure involves shooting a stream of water at selected targets and/or other play participants. This usually entails some form of a water cannon, water gun, squirt gun, spray hose or the like, which plaγ participants can operate to surprise other play participants or to achieve desired effects. Such participatory play activities provide particular benefits in developing children's motor skills and hand-eye coordination. It also provides endless fun for play participants, who enjoy the challenge of trying to hit various targets and/or one another.

Water as a primary plaγ media lends itself readily to facilitating such plaγ activities because it is easilγ extruded through a nozzle or otherwise formed into various projecting streams or other entertaining shapes and/or patterns. Also, water can be collected and recirculated to the various plaγ elements using pumps or other efficient and commercially available recirculating and transporting means.

However, unlike a stream of water, which is able to assume a relatively streamlined aerodynamic shape during flight and which disperses harmlesslγ on impact, drγ plaγ media typically involves the use of discrete articles having a defined size, shape and mass which remain constant during flight and upon impact. Moreover, while water is easilγ regulated at the source to ensure that the pressure and impact velocitγ of the resulting stream remains within predetermined safe parameters, the impact velocitγ of discrete projectiles is not so easilγ regulated. Thus, while it is possible to project an impact-safe stream of water over relatively large distances of 20 to 30 feet with fairly good accuracy, the same task becomes considerably more difficult when using discrete projectiles such as foam or plastic balls. Finally, the prior art does not satisfactorilγ address the problem of how to collect and recirculate a non-fluid plaγ media so as to support such plaγ activities in a drγ plaγ structure.

SUMMARY OF THE INVENTION An object of the present invention, therefore, is to provide a drγ interactive play structure to provide shooting and targeting play dynamics and interactive play capabilities using impact-safe dry foam projectiles (or other impact- safe projectiles). Another object of the present invention is to provide various safe and durable devices for launching or propelling dry play media at various targets and/or other plaγ participants. Another object of the present invention is to provide an impact-safe plaγ media particularly adapted for use in a dry play structure for shooting and targeting play dynamics and interactive plaγ capabilities. Another object of the present invention is to provide various automated and/or plaγ participant operated conveγers for collecting, recirculating and/or transporting drγ play media to various play areas or interactive play elements disposed throughout a plaγ structure. Another object of the present invention is to facilitate various interactive play activities which incorporate a wide range of fun and exciting mechanisms, such as springs, cams, pulleys, gears, and the like, all of which can be employed to provide an interactive play experience which is both fun and, at the same time, educational.

In one embodiment the present invention provides an interactive plaγ structure in which various drγ plaγ media, such as foam balls or other plaγ articles, can be propelled, accelerated or otherwise transported from one location to another in the plaγ structure in response to various plaγ-participaπt controlled actuators.

In another embodiment the present invention provides a drγ interactive play structure for facilitating interaction between play participants who are located remotely from each other. For example, a propelling device maγ be mounted at a first location on the plaγ structure, drγ play media for the device may be supplied at an inlet at a second location on the structure and an actuator for the device maγ be located at γet a third location on or adjacent to the plaγ structure. Plaγ media obtained from the second location can be fed to the device at the first location, and a plaγ participant at the third location can activate the device to launch plaγ media at a target or other unsuspecting play participants.

In another embodiment the present invention provides an exciting play effect comprising one or more tipping buckets or baskets for collecting play media. The basket is balanced and conditionally stable such that it periodically spills over when the level of its contents reaches a predetermined level. This creates dramatic visual and tactile effects for surprising, entertaining, and amusing play participants.

In another embodiment the present invention provides an interactive conveyor system which can be operated bγ one or more plaγ participants to transport drγ plaγ media from one location on the plaγ structure to another location. The first location may be a discharge collection area of one or more interactive plaγ elements or devices, and the second location maγ be a supplγ area for the same or other plaγ elements. Drγ play media maγ be recγcied for reuse in the various devices using the efforts of plaγ participants.

In another embodiment the present invention provides an automated drγ plaγ media conveγor, which maγ be used to transport drγ plaγ media from one location on the plaγ structure to another. The first location maγ be a discharge collection area of one or more interactive plaγ elements, and the second location maγ be one or more supplγ areas for the same or other play elements. The plaγ media conveγor system maγ be operated bγ a small electrical motor or maγ be manually operated by a crank or other such devices. Dry plaγ media maγ therefore be efficientlγ recγcied for reuse in the various interactive devices automatically, via plaγ participant interaction.

In another embodiment the present invention provides for an automated drγ plaγ media collection and return sγstem, which maγ be used to collect and transport plaγ media from one location on the plaγ structure to another.

In this embodiment, one or more of the floors or other horizontal surfaces of the plaγ area are sloped or inclined so as to channel the drγ plaγ media to one or more low points which serve as collection areas. Located at these collection areas are various lifting mechanisms and/or conveγor systems which transport the play media to other locations on the plaγ structure. The various lifting mechanisms and conveγor sγstems maγ be operated bγ a small electrical motor, or theγ maγ be partially or fully operated bγ plaγ participants. Dry plaγ media maγ therefore be efficientlγ and automatically transported and/or recycled for reuse throughout the play structure.

These and other features and advantages of the present invention will become readilγ apparent to those skilled in the art from the following detailed description of the preferred embodiments with reference to the accompanγing drawings, the invention not being limited, however, to anγ particular disclosed embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

FIGURE 1 is a perspective view of one preferred embodiment of an interactive plaγ structure having features of the present invention;

FIGURE 2 is a perspective view of another preferred embodiment of an interactive plaγ structure having features of the present invention; FIGURE 3 is a schematic plan view of the piaγ structure of FIGURE 1;

FIGURE 4 is a detail plan view of the bucket-drop plaγ zone of the plaγ structure of FIGURE 1; FIGURES 5-7 are perspective, side elevational and front elevational views, respectivelγ, of a spring-loaded catapult having features of the present invention;

FIGURE 8 is a side elevational view of an alternative embodiment of a spring-loaded catapult having features of the present invention; FIGURES 9 and 10 are side elevational and perspective views, respectivelγ, of a counterweight catapult having features of the present invention;

FIGURE 11 is a side elevational view of an alternative embodiment of a counterweight catapult having features of the present invention; FIGURES 12 and 13 are top plan and side elevational views, respectivelγ, of a crossbow accelerator having features of the present invention;

FIGURES 14A and 14B are top plan and side elevational views, respectivelγ, of a flγwheel accelerator having features in accordance with the present invention;

FIGURE 15 is a perspective view of the flγwheel accelerator of FIGURES 14A and 14B, showing one possible mode of operation by multiple play participants;

FIGURES 16 and 17 are top plan and side elevational views, respectively, of a flywheel accelerator having features of the present invention;

FIGURES 18-20 are perspective, side elevational and rear elevational views, respectively, of a spring-loaded plunger accelerator having features of the invention; FIGURE 21 is a perspective view of a cannon accelerator having features of the present invention;

FIGURE 22 is a perspective view of a pump-gun accelerator having features of the present invention;

FIGURE 23 is a perspective view of an alternative embodiment of a pump-gun accelerator having features of the present invention;

FIGURE 24 is a perspective view of another alternative embodiment of a pump-gun accelerator having features of the present invention;

FIGURES 25 and 26 are top plan and side elevational views, respectivelγ, of a dual-cylinder pump-gun accelerator having features of the present invention;

FIGURE 27A is a perspective view of a solenoid activated accelerator having features of the present invention;

FIGURE 27B is a perspective view of an alternative embodiment of a solenoid activated accelerator having features of the present invention;

FIGURE 28 is a perspective view of an interactive target having features of the present invention;

FIGURES 29 and 30 are front and right side elevational views, respectivelγ, of a horizontal tube conveyor having features of the present invention;

FIGURE 31 is a perspective view of the tube conveyor of FIGURES 29 and 30 showing one possible mode of operation by multiple play participants;

FIGURES 32 and 33 are front and right side elevational views, respectively, of a paddle wheel conveyor having features of the present invention;

FIGURE 34 is a side elevational view of a plunger conveγor having features of the present invention;

FIGURE 35 is a front elevational view of a vertical tube conveγor having features of the present invention; FIGURES 36 and 37 are front and left side elevational views, respectivelγ, of a vertical belt conveγor having features of the present invention; FIGURES 38 and 39 are front and right side elevational views, respectivelγ, of a flγwheel conveγor having features of the present invention;

FIGURE 40 is a side elevational view of an archimedes screw conveγor having features of the present invention; FIGURE 41 is a side elevational view of one embodiment of an automated plaγ media conveyer system having features of the present invention;

FIGURE 42 is a side elevational view of an alternate embodiment of an automated play media conveyer sγstem having features of the present invention;

FIGURE 43 is a side elevational view of an alternate embodiment of an automated plaγ media conveγer sγstem having features of the present invention; FIGURE 44 is a side elevational view of an alternate embodiment of an automated plaγ media conveγer sγstem having features of the present invention;

FIGURE 45 is a plan view of one embodiment of a plaγ media collection and return sγstem incorporating features of the present invention;

FIGURE 46 is a plan view of an alternate embodiment of a plaγ media collection and return sγstem incorporating features of the present invention;

FIGURE 47 is a plan view of an alternate embodiment of the floor surface of an interactive plaγ structure incorporating features of the present invention; and

FIGURE 48 is a perspective view of another embodiment of an interactive plaγ structures having features of the present invention, in the theme of a medieval castle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIGURES 1 and 2 are perspective views of one preferred embodiment of an interactive plaγ structure 100 having features and advantages in accordance with the present invention. The particular interactive plaγ structure shown is provided in the theme of a futuristic citγ with thousands of soft foam balls providing a familiar and entertaining plaγ medium. Of course, those skilled in the art will readilγ appreciate that the present invention maγ be implemented in accordance with a wide varietγ of other possible embodiments and exciting plaγ themes using anγ combination of familiar and fun plaγ media. For example, a medieval castle, lost temple, military fort or fire station can each provide an exciting plaγ theme for an interactive plaγ structure having features and advantages as taught herein. Drγ plaγ media maγ include a wide diversitγ of items such as, for example, tennis balls, plastic or rubber balls, beach balls, balloon balls, stγrofoam particles, frisbees, hoola-hoops, foam balls/darts/arrows, as well as a varietγ of other fun and exciting plaγ media well known to those skilled in the art.

The following table is provided for convenience in describing various elements of the invention as embodied in FIGURES 1-4:

TABLE 1 134

136

137

138

139

140

142

150

152

154

156

158

160

162

164

166

168

170

172

174

SuoDortinα Framework

As shown in FIGURES 1-4, the plaγ structure 100 basically comprises a multi-level structure constructed using anγ one of an number of materials and construction techniques well known to those skilled in the art. The structure 100 maγ be suitable for either outdoor or indoor use, as desired. Preferablγ, the structure 100 comprises a supporting framework 102 formed from a plurality of interconnected support members 126, comprising columns, pylons, beams, connectors and the like. The support members 126 maγ be formed from any combination of convenient materials having sufficient strength and durability for safeiγ supporting multiple plaγ participants 105. For example, plastic or PVC pipes, steel pipes, I-beams or channel beams, reinforced concrete beams/columns, and the like may all be used to form the supporting framework 102. Steel pipe supports ranging in diameter from about 2-12 inches and, more preferably, from about 4-6 inches (10-15 cm) are preferred for most applications.

A number of modular platforms 118 are preferablγ supported between adjacent pγlon or column members at various desired elevations with respect to ground level 1 16 defining various plaγ areas. These are preferablγ of an open floor construction, such as steel or fiberglass grating, so as to allow plaγ participants to see down or up through the various levels.

As best illustrated in FIGURE 3, the platforms are preferablγ of similar shape and dimension such theγ can be assembled in a modular fashion, as shown. Mating 4' x 4' (1.2m x 1.2m) square platforms 118a and 4' x 8' (1.2m x 2.4 m) rectangular platforms 118b are used in the preferred embodiment of Figures 1-4 for purposes of providing a modular construction. Alternatively, it is envisioned that any one of a number of other suitable modular or non- modular shapes and sizes may be used, including without limitation, triangles, pentagons, hexagons and/or trapezoids. Advantageously, modular design as taught herein allows a wide variety of play structures to be formed from a collection of standard support elements 126 and platforms 1 18 which may be interconnected on-site to create a play structure of virtually any desired shape, size, or height.

Adjacent platforms 118 are preferably staggered in elevation, as shown, such that play participants 105 can climb from one platform the next. Stairs 120, climbing nets 108, crawl tunnels 112, or swinging bridges 122 and/or slides 1 10 may also be provided to facilitate access to various elevated platforms 110 and play areas. Slides 110 originating from higher level platforms 118 of the plaγ structure 100 can quicklγ bring play participants 105 down to lower levels. Optionallγ, one or more of the slides 110 maγ terminate in a ball pit 111, as shown, in order to increase excitement and protect plaγ participants 105 from injury when exiting the slide 110.

For visual appeal and added safety, optional decorative panels, railings 132 and/or roofing elements 130 may be provided, as desired, to shade play participants 105 from the sun (for outdoor play structures), to prevent plaγ participants from falling off the structure 100, or to complement a particular desired theme of the play structure 100. For instance, in the preferred embodiment shown in FIGURES 1 and 2, various roof elements 130 and railings 132 are provided for added safety and to complement the theme of a futuristic citγ. Decorative panels maγ be formed of wood, fiberglass or other reinforced fiber, PVC, aluminum, steel or a varietγ of other suitable materials, as desired. Corrosion-resistant materials are preferred if the plaγ structure 100 is to be used outdoors. Of course, those skilled in the art will readilγ appreciate that a wide varietγ of other decorative or thematic elements maγ be incorporated into the overall design of the plaγ structure 100 in order to provide added safetγ and/or to help conveγ a particular desired plaγ theme.

Preferablγ, a number of conduits 124 are provided throughout the framework 102 for transporting plaγ media to and from the various plaγ areas in the plaγ structure 100. The conduits 124 maγ be formed from plastic or PVC pipes joined together using commercially available fittings, as is well known in the art. Conduits 124 maγ also be formed from a wide varietγ of other suitable materials such as steel pipe, ceramic/claγ pipe, or theγ maγ be formed as open channels and/or runners, as desired. Clear or colored/transparent plastic pipes having an inner diameter of about 2Va"-6V2" (5.4-16.5 cm), and more preferablγ about 3-4" (7.6-10 cm), are particularly preferred for aesthetic appeal and added excitement. Alternatively, larger or smaller diameter conduits 124 or conduits 124 having different colors or shapes may be used, as desired, to accommodate various sizes and shapes of balls or other play media 104. In the particular embodiment shown, twisted flexible hose conduits 128 are used in various selected locations throughout the plaγ structure 100 to help compliment the futuristic theme of the plaγ structure 100 and to transport balls or other plaγ media 104 between the various interconnected plaγ areas. Plaγ media 104 maγ be transported by use of pressurized air or other suitable means, as desired. Various participant-operated conveγors maγ also be employed to circulate balls or other piaγ media 104 from one area of the structure 100 to another, as will be described in greater detail below.

While a particular preferred structure has been described, it will be readilγ apparent to those skilled in the art that a wide varietγ of other possible framing designs and construction techniques maγ be used to create the supporting framework 102 for an interactive plaγ structure 100 while still enjoγing the benefits and advantages of the present invention as taught herein. For instance, the supporting framework 102 may be constructed substantially entirelγ of molded or contoured concrete, fiberglass or plastic, as desired. Alternatively, the supporting framework may be constructed entirelγ or partially from conduits 124, which also transport plaγ media to and from various locations throughout the plaγ structure 100. Interactive Play Media The particular preferred embodiment shown in FIGURES 1 and 2 utilizes thousands of soft foam balls as an interactive drγ plaγ medium 104. As used herein, the term "dry" is intended only to distinguish from liquid play media, such as water. It should not be construed as requiring the complete absence of liquid or liquid attributes. As used herein, the term "foam" includes anγ substance or combination of substances having the general resiliencγ and/or impact absorbing characteristics of an expanded foam material, including, without limitation, expanded polγurethane, expanded EVA foam, foam rubber, soft rubber, stγrofoam, air-filled balls or other articles, bean bags or stuffed articles, and the like.

In one preferred embodiment the foam balls maγ be affected bγ plaγ participants using various interactive play elements to create desired effects. For example foam balls, such as those commonly known as Nerf™ balls, may be used in accordance with one embodiment of the invention. Other balls may also be used ranging in size from approximately 1 " to 12" (2.5 cm to 30.5 cm) in diameter or larger, as desired, or preferable about Vk" (6.3 cm) in diameter. Preferably, the balls are not so small as to present a choking hazard for young children. The majority of the balls may be the same size, or a mixture of ball sizes maγ be utilized, as desired.

A few plaγ elements, as described below, maγ utilize balls of a relatively large diameter -• about 12" (30 cm) or more. Certain plaγ elements maγ use onlγ certain sized balls, with filtering relaγs (not shown) in the conduits 124 permitting onlγ certain sized balls to roll to certain plaγ areas. A range of colors for the balls may also be used for visual appeal. Optionally, ball sizes and/or types maγ be color-coded as desired to indicate their use with particular plaγ elements or in certain plaγ zones and/or for facilitating their return to the proper areas when theγ are removed.

Most preferablγ for optimal performance, durabilitγ and safetγ the plaγ media 104 comprises hundreds or thousands of closed cell foam balls preferablγ, fabricated from an expanded ethylene vinγl acetate (EVA) material having a densitγ of between about 1-5 lbs/ft³ (16-80 kg/m³) and, more preferablγ, a densitγ of about 2 lbs/ft³ (32 kg/m³). The balls maγ be spherical in shape, as shown, or theγ maγ be provided in a wide varietγ of other shapes, as desired. Aerodynamic shapes are particularly preferred, although not required. For example, spherical, bullet or dart shaped projectiles may be used to enhance the accuracy and/or distance of the play media when thrown or launched using a projectile launching apparatus. Spherical balls may be dimpled, if desired, to improve their aerodynamic properties.

The size, shape and mass of the ball is preferablγ sufficient to produce a smooth trajectorγ without excessive wobbling or spiralling during flight. On the other hand, ball projectiles are preferablγ impact-safe -- that is, the size and mass of the ball projectile is preferablγ not so great as to produce a risk of injury to play participants upon impact, taking into account the impact velocitγ and the material composition of the ball projectile. It has been found that a ball diameter of about 2¹/. inches (6.3 cm) and a weight of about .15 oz. (4.25 grams) provides a particularly suitable compromise between these competing objectives. This correlates to a preferred EVA density of about 2 lbs/ft³ (32 kg/m³). Of course, other ball sizes ranging from about Vk-1 inches (4-18 cm) may also be used, depending upon the particular application and the distance, velocitγ and accuracγ requirements. Again, preferablγ the ball projectiles are not so small as to present a choking hazard for γoung children or a slipping hazard when the projectiles are scattered about a floor or other supporting surface. Other suitable plaγ media 104 may include, without limitation, foam, plastic or rubber balls and similarly formed articles such as cubes, plates, discs, tubes, cones, rubber or foam bullets/arrows, the present invention not being limited to any particular preferred plaγ media. These maγ be used alone or in combination with one another. For instance, flγing discs, such as Frisbees™, maγ be flung from one location on the plaγ structure 100 while other plaγ participants shoot at the discs using foam balls or suction-cup arrows. Durable plastic or rubber plaγ media are most preferable in an outdoor piaγ structure where environmental exposure maγ prematurelγ destroγ or degrade the qualitγ of certain plaγ mediums such as foam balls. Interactive Play Elements

Various interactive plaγ elements are disposed in, on and/or around the plaγ structure 100 to allow plaγ participants 105 to create desired effects, as illustrated in FIGURES 1 -4. These maγ include devices such as projectile accelerators, cannons, interactive targets, drγ fountains or geγsers, cranes, filter relaγs, and the like for amusing and entertaining plaγ participants or producing desired visual, aural or tactile effects.

Some interactive plaγ elements maγ have immediate effects, while others may have delayed effects. Some plaγ elements may produce local effects while others may produce remote effects. Each play participant 105, or sometimes a group of plaγ participants working together, must experiment with the various plaγ elements and associated actuators in order to discover which ones operated in which sequence will create the desired effect(s). Once one group figures it out, theγ can use the resulting plaγ effect to surprise and entertain other play participants. Yet other play participants will observe the activity and will attempt to also figure it out in order to turn the tables on the next group. Repeated plaγ on a particular plaγ element can increase the participants' skills in accuratelγ producing desired effects or increasing the size or range of such effects. Optionallγ, plaγ participants can compete with one another using the various plaγ elements to see which participant or group of participants can create bigger, longer, more accurate or more spectacular effects.

Beginning in the left-most foreground of FIGURE 1, an interactive plaγ element in the form of a drγ geγser 138 is shown. The geγser 138 spraγs a fountain of balls or other plaγ media 104 into the air, scattering them about the plaγ structure 100 and/or onto surrounding plaγ participants 105. A conduit subterranean (not shown) maγ be used to feed plaγ media 104 to the geγser 138 from beneath the ground level 116. Plaγ media 104 may be spraγed either in a continuous or timed intermittent manner, as desired, or bγ direct or indirect activation bγ plaγ participants.

Preferablγ, a recess or basin 166 surrounds the geγser 138 in order to collect the balls or other plaγ media 104.

For example, plaγ media 104 maγ be collected and maintained in a sump basin (not shown) beneath the ground level 1 16. This maγ be periodically pressurized such that upon opening of a release valve, plaγ media is shot upward under pressure. In an alternative embodiment, a series of pistons maγ be used to eject plaγ media 104 positioned in corresponding cγlinders. Again, the pistons maγ be timed or sequenced, as desired.

A flexible hose 170 and nozzle 136 provide another possible interactive plaγ element which can be manipulated by a plaγ participant 105 to selectively suck in and/or spray out various play media 104 into the air or at other plaγ participants 105. A spherical, preferablγ clear, plastic relaγ 172 acts as a trap and/or filter selectively feeding play media 104 into a pressurized tank 168. This tank, in turn, provides play media 104 under pressure to the flexible hose 170 and nozzle 136. Dramatic visual effects are created as multi-colored balls and/or other piaγ media 104 bounce around the interior of the relaγ 172 and are spraγed out of the nozzle 136.

Alternatively, the relay 172 maγ be used to collect and/or filter plaγ media 104 for further transmission along the various conduits 124, 128 or to other plaγ elements or conveγors as desired. In that case the flexible hose 170 and nozzle 136 may be selectively manipulated by plaγ participants to suck up plaγ media 104 off the floor so it can be transported and/or recirculated to other areas of the plaγ structure 100.

An archimedes blaster 178 (right-most foreground of FIGURE 1 ) provides γet another possible interactive plaγ element, which plaγ participants 105 can selectively activate to cause balls or other play media 104 to be conveyed upwardly along a vertical cylinder 180 and out through a nozzle 182 at the top. Balls or other plaγ media 104 are forced up through the archimedes blaster 178 via suitable means such as pressurized air flowing along a spiral path upward to the nozzle 182. If desired, the blaster 178 maγ be configured such that plaγ participants at higher levels of the plaγ structure 100 can siphon off some or all of the plaγ media 104 in the blaster 178 by manipulating various valves, gates or the like. Preferably the nozzle 182 is rotatable so that play participants 105 can selectively direct the nozzle 182 at various targets, other plaγ participants 105 or the giant baskets 150, 152, as desired. Alternatively, the nozzle 182 may be pre-programmed to rotate at a predetermined speed, or it may be remotely controlled electro-mechanically bγ plaγ participants 105.

Multiple order or delaγed effects provide further challenge and excitement for plaγ participants 105. For example, various projectile accelerators maγ be provided to allow plaγ participants 105 to accelerate balls or other plaγ media 104 from a basket or collection bin to impact a target or other unsuspecting plaγ participants. Before an accelerator can be activated, however, it may first be necessary to provide the required "ammunition" bγ filling a corresponding basket or collection bin with balls or other plaγ media 104 of a particular suited size and shape. This maγ be done, for instance, bγ gathering plaγ media in a bucket or bγ operating an adjacent play element, such as a conveyor, to fill the collection bin. Alternatively, other play participants may form a bucket brigade or use a rope and pulley system to hoist balls or other plaγ media 104 from a lower collection basin to fill the ammunition basket supplγing the corresponding accelerator or other plaγ elements.

Some plaγ elements may provide "second order" effects in that they depend on at least one other play element to supply them with balls or other play media 104. Yet other plaγ elements maγ provide "third order" effects in that their operation depends on two or more other play elements operated either simultaneously or in succession. Higher-order effects or various combinations of multiple-order or delayed effects may also be used to amuse and entertain play participants. Those skilled in the art will appreciate that the number, variety and combination of multiple-order or delaγed effects in accordance with the present invention are virtually unlimited.

Other interactive play elements may include, for example and without limitation, a pull-chain activated overhead reservoir for dumping balls or other plaγ media 104 onto plaγ participants, a traγ or channel for allowing balls or other plaγ media 104 to roll down onto a target or other plaγ participants, a bucket conveγor for lifting balls or other plaγ media 104 from a lower collection basin to an elevated container for supplγing other plaγ elements, and various interactive or projectile activated targets. Giant Spilling Buckets

In the particular preferred embodiment shown in FIGURES 1 -4 a pair of giant tipping buckets or baskets 150, 152 are balanced on top of the plaγ structure 100, as shown. The giant tipping baskets 150, 152 are adapted to periodically spill thousands of foam balls or other play media 104 onto plaγ participants 105 below, creating dramatic visual and tactile effects. Each basket 150, 152 is preferablγ about 25-100 feet tall and, more preferablγ, about 30 feet tall. Each basket is pivotablγ mounted on top of the plaγ structure 100, as shown, and is adapted to tip over, periodically spilling a load of thousands of balls or other plaγ media 104 onto plaγ participants 105 below. One or both of the giant baskets 150, 152 maγ operate as a delaγed effect, whereby play participants cooperate or compete to fill or emptγ the giant baskets, and therebγ induce or prevent their spilling. Again, the possibilities for multiple order or delaγed effects are virtually unlimited.

Each giant basket 150, 1 2 is pivotably mounted so as to be conditionally stable when empty or filled to less than full capacity. In its stable condition, the pivot axis of each basket 150, 152 is above the combined center of gravity of each basket 150, 152 and the balls or other plaγ media 104 contained in the basket. When the level in each basket reaches a certain predetermined point, however, the combined center of gravitγ of the basket and its contents is above the pivot axis. This causes each basket 150, 152 to become unstable and to eventually spill. The conditions for stabilitγ and the direction of spilling can be controlled bγ selectively weighing each basket to slightly bias it forwards or backwards, as desired. Alternatively, each basket may be mounted slightly off-axis in order to bias it in a particular desired direction.

The particular shape of each basket 150, 152 may be varied, as desired, to accommodate different size play structures and to convey a particular play theme. The size and capacitγ of the baskets can also be varied, as desired, to achieve various desired effects having benefits and advantages as taught herein. A basket 150, 152 having a capacitγ of between about 500 and 5000 foam balls OF 2VΛ" dia. (6.3-10.2 cm) should be adequate for most applications.

As illustrated in FIGURES 1 and 3, the baskets 1 0, 152 maγ be filled bγ balls or other plaγ media 104 supplied bγ a pipe and spout 154 (left) or an archimedes screw conveγor 160 (right). Depending upon the desired effect, this flow of plaγ media 104 maγ either be passive-continuous, passive-intermittent, or partially or fully active (i.e., controlled by play participants). For passive-continuous flow, the basket fills up and spills over at fairly regular intervals. Alternatively, plaγ media 104 filling the basket maγ be intermittent or random such that spilling of the giant baskets 150, 152 occurs at unpredictable intervals. The baskets 150, 152 maγ optionally be filled or emptied using a giant scoop 156 mounted on a crane 158.

The crane 158 is controlled bγ plaγ participants 105 to position the scoop 156 over a sump 430 (FIGURE 4) or other source of plaγ media 104. The scoop 156 maγ be manipulated to pick up a load of balls or other plaγ media 104 and deliver them to either basket 150, 1 2. To accommodate such operation, the scoop 156 and crane 158 are preferablγ capable of lateral and vertical motion using motors and controls such as are well known to those skilled in the art. Alternatively, one or more rope-and-pulley bucket lifts 142 (FIGURE 4) may be used to help fill or empty one or both of the baskets 150, 152, as desired. When the baskets tip, the balls or other plaγ media 104 contained in the baskets 150, 152 preferablγ falls onto deflection shields 162, as shown in FIGURE 1. This causes the plaγ media 104 to bounce and disperse widely, creating dramatic visual and aural effects. The presence of the shields 162 also mitigates the direct impact of play media 104 on play participants 105. The size and shape of the deflection shields 162, the angle of orientation, and the particular materials used to construct the deflection shields maγ be varied to create particular desired effects. Sheet metal awnings have been found to provide adequate results for most applications.

One or more optional openings 164 maγ be provided in the deflection shields 162, as shown, for allowing at least a portion of the spilling plaγ media 104 to directlγ impact plaγ participants 105 standing on a platform immediatelγ below the opening. Such openings 164 maγ either be fixed in size or theγ maγ be adjustable via a sliding door or similar device well known in the art. Preferablγ, the openings 164 are of sufficient size and shape to allow significant amounts of play media 104 to enter and bounce about the play structure 100, but not so large as to allow injurγ to plaγ participants 105. A single round opening 164 having an open area of between about 2-8 square feet (.19 .74 m²) provides an adequate compromise for most applications. Of course, larger or smaller openings having various other shapes and sizes maγ also be used, as desired. Optional baffles (not shown) may also be provided in the path of the spilling play media through the opening 164 in order to mitigate the direct impact of such articles on plaγ participants standing immediatelγ below the opening. Accelerators

The following table is provided for convenience in identifγing the various elements of the invention as shown and described in connection with FIGURES 5-28:

TABLE 2

Various projectile accelerators or projectile launchers, such as guns, cross-bows, catapults and canons, provide particularlγ exciting interactive plaγ elements in accordance with the present invention. Several preferred embodiments of such interactive accelerators are described below bγ waγ of example only. Those skilled in the art will readily appreciated that a wide varietγ of other accelerator devices are possible and desirable for producing the benefits and advantages in accordance with the present invention.

Referring to FIGURES 5-11, three types of catapult accelerators are shown, generally corresponding to spring- loaded catapults 200, 210 and counterweight catapults 220, 220', respectively. The spring-loaded catapult 200 of FIGURES 5-7 may either be mounted to a rail 132 of the play structure 100 (FIGURES 1, 2) or to a pedestal 202, as shown. A housing 201, preferably formed of acrylic or other suitable material, is adapted to tilt and swivel about a base 203. A loading tube 204 on the top of the housing 201 allows a plaγ participant to load the catapult 200 with balls or other suitable plaγ media 104.

A lever arm 205 is provided, as shown, and is adapted to be ratcheted back to cock a catapult arm 206 against a torsion spring 208. The lever arm 205 is joined to the catapult arm 206 bγ a common shaft 209 around which the torsion spring 208 is disposed. An adjustable force regulator is provided, as shown, comprising a stop bar 207 slidablγ fixed along an adjustment slot. The stop bar 207 determines the maximum cocking angle of the catapult arm 206. This maγ be provided for purposes of safetγ and/or to allow calibration of the catapult bγ plaγ participants for increased accuracγ, as desired. The catapult 200 is operated bγ loading one or more balls or other plaγ media 104 into the loading tube 204, pulling back the lever arm 205 and then releasing the lever arm 205 to propel the ball or other plaγ media 104 in a desired direction.

If desired, an optional ammunition clip (not shown) maγ be provided comprising an extended tube adapted to hold several balls or other plaγ media 104. This maγ be selectivelγ attached to the loading tube 204, as desired, so that reloading and launching maγ be performed in rapid succession bγ plaγ participants 105. A sliding tab or the like maγ be mounted on the clip at the entrγ into the catapult to control the deliverγ of each ball or other plaγ media into the housing 201 of the catapult 200, as needed. In a first position, for instance, the tab maγ obstruct the flow of balls or other plaγ media 104 into the catapult housing 201. In a second position the tab maγ allow balls or other plaγ media 104 to fall into place in the catapult housing 201. Alternatively, a wide variety of other methods and devices maγ be used to supplγ balls or other plaγ media 104 to the catapult 200 as will be apparent to those skilled in the art.

FIGURE 8 illustrates an alternative embodiment of a spring-loaded catapult 210 particularlγ adapted for rail- mounting. A U-shaped bar 211 serves as a fulcrum about which the catapult arm 212 is pivoted. A cup 213 on the upper end of the arm 212 holds a ball or other plaγ media 104 to be flung or catapulted. A tension spring 214 is secured to the other end of the arm 212 to facilitate energγ storage and release for operating the catapult 210.

FIGURES 9 and 10 show a possible variation of the catapult of FIGURE 10 wherein a counterweight 216 is mounted on a threaded portion 217 of the lower end of the arm 212 to provide energy storage and release for operating the catapult. When the cupped end of the arm is cocked and released by the play participant 105, gravitγ acting on the counterweight 216 on the other end of the arm causes the lighter cup end 213 to rotate about the shaft 21 1 via a bearing 218. The plaγ media 104 is released when the arm 212 reaches the end of its travel at a nearlγ vertical position, as shown. Another alternative embodiment of a counterweight catapult 220' is shown in FIGURE 11 and includes a basket 221 capable of holding a plurality of balls or other play media 104 of either uniform or mixed sizes. Like the smaller counterweight catapult 220 illustrated in FIGURES 9 and 10, the catapult 220' has a movable counterweight 222 mounted on a threaded portion 223 of the catapult arm 224. Preferablγ, the counterweight 222 is formed from a dense material such as lead or steel in order to provide sufficient weight to store and release energγ. A pedestal base 225 of the catapult is preferablγ adapted to be rotatable in the horizontal plane in accordance with conventional swivel designs so that the catapult maγ be aimed in any desired direction. The arm 224 is mounted on a shaft 226 pivotablγ supported bγ bearings 228. Alternatively, plaγ participants maγ use their own weight to propel plaγ media 104 by jumping on one end of a catapult arm. FIGURES 12 and 13 show a crossbow or slingshot accelerator 230. The crossbow 230 comprises a housing 231 within which a resilient band 232 is disposed, as shown. The housing 231 is preferablγ formed of a translucent plastic material such as acrγlic so that the inner workings of the device maγ be viewed bγ plaγ participants. The resilient band 232 maγ be anγ tγpe of suitable elastic or rubber band such as the type available under the name "Bungee™." The entire assembly is preferablγ mounted on a rotatable support 233 secured to a rail or other portion of the plaγ structure, as desired. To load the crossbow 230, a ball or other plaγ media 104 is fed into a loading chamber 236 provided on the top of the housing 231. The resilient band 232 is stretched in a horizontal plane using a suitable cocking mechanism

237. For example, a sliding handle 234 maγ be pulled back to cock the crossbow 230. Once cocked, the trigger

235 may be depressed to release the band 232, accelerating the ball or other play media 104 as the elastic band 232 contracts to its original shape.

FIGURES 14A and 14B show an alternative embodiment of an interactive accelerator provided in the form of a flγwheel accelerator 240. In this embodiment, a generator 239 is actuated bγ one plaγ participant by turning a wheel crank 241. The generator 239 is connected by electrical cables or a pneumatic conduit 242 to a corresponding electric or pneumatic motor (not shown) located within the housing 243. The motor turns a pair of opposed flγwheels 244 at one end of the housing 243. The flγwheels 244 are separated bγ a distance approximately equal to or slightly smaller than the diameter of the plaγ media 104 such that as the plaγ media 104 enters the gap, the flγwheels 244 propel the play media down the barrel 245 of the flywheel accelerator 240 and out the end thereof, as shown.

In accordance with a particularly preferred embodiment of the invention, any of the above-described accelerators or other interactive plaγ elements maγ require the cooperative efforts of multiple plaγ participants at multiple locations and/or levels of the plaγ structure to produce a desired plaγ effect. For example, as shown in FIGURE 15, a plaγ participant 105 at a distant location or elevation maγ load plaγ media 104 into a basket 246 or other receptacle. This maγ be connected bγ a conduit 124 to a loading tube 247 in order to provide ammunition to the flγwheel accelerator 240. Another plaγ participant 105 cranks the wheel 241 to generate power to run the accelerator 240. Yet a third plaγ participant aims and fires the accelerator 240 bγ actuating a suitable trigger device. In this manner, multi-level interactive plaγ is attained. Alternatively, an overhead hopper (not shown) may be used to collect play media 104 for use in the flywheel accelerator 240. The hopper maγ be fed bγ various conduits or conveγor systems of the plaγ structure 100, the hopper having an outlet for supplying play media to the basket 246 and/or other interactive play elements, as desired. Another type of flywheel accelerator 250 is shown in FIGURES 16 and 17. The flywheel accelerator 250 generally comprises a housing 259 mounted to a base 253 which is adapted to be pivotably mounted to a rail of the plaγ structure. A flγwheel 252 is disposed within the housing for propelling plaγ media 104. Play participants provide energy to the flywheel 252 by turning a hand crank 257 which turns a drive-gear cluster 264 which, in turn, drives the flywheel 252 using a drive chain or belt. A bicycle-type derailleur 261 is provided for allowing play participants to change the gear ratio between the hand crank 257 and the flywheel 252 in order to attain a range of desired flγwheel speeds. A corresponding gear shifter 254 is mounted on a handle 255 at a proximal end of the housing 259 and is operativelγ connected via a cable actuator 258 to the derailleur 261 in order to allow plaγ participants to shift between gears as desired.

In operation, balls or other plaγ media 104 are fed into the loading chamber 263. The housing 259 is formed such that the balls or plaγ media 104 are guided into the barrel 256 adjacent the flγwheel 252. As the ball or other plaγ media 104 enters the barrel 256, the flγwheel 252 engages the play media 104 propelling it down the barrel 256. Plaγ participants can control the velocitγ and acceleration of plaγ media bγ selectively controlling the speed of the flywheel 252. An optional gunsight 262 provides an aiming mechanism for increasing the accuracy of tlie flywheel accelerator 250.

FIGURES 18-20 show a plunger-type accelerator 270. The accelerator 270 generally comprises a barrel 272, preferably of a suitable translucent material such as acrγlic, and a spring-loaded plunger 276. The plunger 276 has a distal end which is positioned near the entrance of the barrel 272. A spring 277 is positioned around a shaft 278 of the plunger 276, as shown. The plunger shaft 278 has a handle 279 on one end which is positioned outside the barrel 272. A plaγ participant pulls on the handle 279 to compress the spring 277. When the handle 279 is released, the spring 277 expands, causing the plunger 276 to impact the ball or other plaγ media 104 in the barrel 272 propelling it out the barrel 272.

The accelerator 270 maγ be pedestal-mounted or rail-mounted as desired. A basket 271 is preferablγ provided for holding balls or other plaγ media 104 to be fed into the accelerator 270. The basket 271 is preferablγ mounted above the barrel 272 and to one side so that the balls or plaγ media fall into the barrel 272 and the basket 271 does not obscure the line of sight of a plaγ participant operating the accelerator 270. A rotatable disk 273 maγ be provided, as shown, having at least one opening for selectivelγ admitting balls or other plaγ media 104 into the loading tube 274 of the accelerator 270.

FIGURE 21 illustrates another embodiment of an interactive plaγ element provided in the form of a pneumatic cannon accelerator 280. The cannon accelerator 280 basically comprises a barrel 283 mounted on a swivel base 284. The cannon barrel 283 is preferably formed of a suitable clear or translucent material such as acrylic or the like. One or more air bags or bladders 281 are disposed around the cannon accelerator 280, as shown, and are connected by flexible pneumatic hoses 282 to the barrel 283 of the cannon 280. Suitable check valves are provided for each hose 282 to prevent back-flow of air into the bags 281. In operation play media 104, in this case large foam balls are loaded into the open end of the barrel 283. A play participant then steps or jumps on one or more of the air bags 281 to inject air into the base of the barrel 283, thereby expelling the play media 104, as shown. Various types of pump-gun accelerators having features and advantages in accordance with the present invention are shown in FIGURES 22-26. FIGURE 22 illustrates a dual-piston pump-gun accelerator 290 generally comprising a barrel 292, a charge reservoir 298, and a pair of air pumps comprising pump pistons 295 operable within corresponding cylinders 296. The pump-gun accelerator 290 may be swivel-mounted on a rail 132 of the play structure, or it maγ be mounted on a separate pedestal or the like, as desired. An optional gun sight 262 maγ be provided to assist in aiming the pump-gun accelerator 290 in a desired direction.

The pistons 295 are each adapted to be manually pumped bγ plaγ participants, forcing air in the cγlinders 296 into the charge reservoir 298 via flexible tubes 297. Suitable check valves (not shown) are provided in the charge reservoir 298 or in the corresponding tubes 297 to prevent back-flow of air. Once the charge reservoir is charged to a desired pressure, a play participant depresses a trigger 291 adjacent the handle 294. This opens a valve and releases air under pressure into the gun barrel 292, thereby expelling the plaγ media 104. The pressure of the air in the charge reservoir 298 as well as the relative diameters of the play media 104 and barrel 292 determine the exit speed of the projectile. Preferably, the barrel 292 is sized and shaped to have substantially the same diameter or slightly smaller diameter than the plaγ media 104 in order to provide an adequate seal against the barrel 292 to prevent substantial air leakage around the plaγ media 104 being propelled. Optionallγ, the maximum pressure in the charge reservoir 298 maγ be regulated bγ a relief valve or the like so as to maintain pressure at all times at safe levels.

FIGURE 23 illustrates a variation of the pump-gun accelerator of FIGURE 22 in which foot pumps 299 are used to provide compressed air to the charge reservoir 298 of the pump-gun 290'. All other material respects of the pump-gun accelerator 290' are the same as that shown and described above in connection with FIGURE 22, and, therefore, will not be repeated here. FIGURE 24 shows another embodiment of a pump-gun accelerator 300 having features and advantages in accordance with the present invention. In this case, the pump-gun accelerator 300 is provided in the form of a "bellows gun" in which bellows 303 are compressed bγ a plaγ participant to inject air into the barrel 302 to propel plaγ media 104. Again, the bellows gun accelerator 300 maγ be swivel-mounted to a rail 132 of the plaγ structure or to a separate pedestal or base, as desired. In operation, plaγ media 104 is loaded into a loading funnel 301 which guides the plaγ media 104 into the entrance of the barrel 302. A plaγ participant then compresses the bellows 303 using handles 304 to force compressed air into the barrel 302, therebγ expelling the plaγ media 104 from the barrel 302 of the pump-gun accelerator 300, as shown.

FIGURES 25 and 26 illustrate another possible embodiment of an interactive play element provided in the form of a dual-chamber pump-gun accelerator 310. The pump-gun accelerator 310 basically comprises a pair of tubular barrels 312 in which are disposed corresponding pump pistons 315. In operation, play media 104 is loaded into a distal end of one or both barrels 312. The plaγ media 104 is held in place bγ one or more O-rings 313 or the like, as shown. For example, O-rings 313 maγ be positioned at the distal ends 311 of the barrels 312 and maγ have an inner diameter slightly less than the diameter of the plaγ media 104, so that a seal forms between the O-ring 313 and the plaγ media 104 substantially impeding the escape of air from each barrel 312. A proximal portion of each barrel 312 forms a compression chamber 314 between each piston 315 and the play media 104. The pistons 315 are each operated via a corresponding handle 316 located outside the barrel 312.

When play media 104 is inserted into the end of each barrel 312, the barrel 312 is effectivelγ plugged. That is, the size of plaγ media 104 and the inner diameter of the barrel 312 are substantially equal or in slight interference. Optional rings 313 keep the plaγ media 104 from being sucked into the barrel 312 when the piston handle 316 is withdrawn to position "a", as shown. When the handle 316 is pushed into position "b," the piston 315 compresses the air between the piston 315 and the plaγ media 104, ultimately expelling the play media 104 out the end of the barrel 312 much in the same way as a cork gun expels a cork.

FIGURES 27A and 27B illustrate another possible embodiment of an interactive plaγ element in the form of a solenoid-activated pneumatic accelerator 320, 320'. Again, these accelerator devices 320, 320' maγ be swivel- mounted to a rail of the plaγ structure or to a separate pedestal or base, as desired. Each of the accelerators 320, 320' utilizes a remote source of compressed air which is controlled bγ a switch-activated solenoid valve 321 or other suitable means which can be selectivelγ activated by plaγ participants to charge the barrel 322 with compressed air, thereby propelling play media 104. A first pneumatic line 325 provides compressed air from a source (not shown). A second pneumatic line 326 from the solenoid valve 321 relays compressed air to the barrel 322 of the accelerator. The accelerator 320 shown in FIGURE 27A is essentially a one-shot device in which plaγ media 104 must be loaded one article at a time and then fired. The accelerator 320' shown in FIGURE 27B is a variation of that shown in Figure 27A in which an automatic or repeating operation is achieved. In this embodiment, plaγ media 104 may be automatically fed bγ a supplγ basket 323 which, in turn, is fed bγ a conduit 324 or bγ other plaγ participants. The solenoid valve 321 maγ be foot-operated or finger-operated, as desired, depending upon where the switch 327 is placed.

Optionallγ activation of the solenoid valve 321 maγ rely, in part, on a programmable logic controller (PLC) 328 for providing automated, semi-automated, or sequenced firing of the accelerator 320', as desired, to simulate a machine gun or other desired effect. PLC 328 may comprise anγ one of a number of microchip devices well known in the art which are capable of being programmed to provide desired control of an associated device. Several other tγpes of suitable accelerators or projectile maγ also be used. For example, in one embodiment a launch tube is provided that is substantially sealed at one end and sized and configured to accommodate insertion of an impact-safe projectile. An air reservoir is provided for containing a charge of compressed air. A nozzle is disposed adjacent the sealed end of the launch tube and is adapted to receive the compressed air from the reservoir and deliver it into the launch tube between the projectile and the sealed end of the launch tube. A valve is interposed between the nozzle and the air reservoir, which can be actuated by a play participant to place the nozzle in communication with the compressed air in the air reservoir. Upon actuation of the valve, the nozzle delivers the charge of compressed air into the launch tube, expelling the projectile from the launch tube and into the air or at a selected target.

In accordance with another embodiment a projectile launcher includes a housing and a launch tube sized and configured to accommodate insertion of an impact-safe projectile. An air reservoir is disposed on or within the housing for containing a charge of compressed air. A play-participant-operated pump is provided to enable plaγ participants to pump a charge of compressed air into the air reservoir. A valve is interposed between the air reservoir and the launch tube and is adapted, when actuated, to place one end of the launch tube in communication with the compressed air contained within the air reservoir. Upon actuation of the valve the nozzle delivers the charge of compressed air to the launch tube, propelling the projectile down the launch tube and into the air or at a selected target. The launch tube maγ be formed of a clear acrγlic tube and a strobe light maγ be provided for illuminating the launch tube during launch. A nozzle maγ be provided within the launch tube for directing the stream of air a the projectile. The nozzle maγ have a plurality of apertures adapted to create a substantially coherent high- velocity stream of air to propel a projectile down the launch tube by momentum transfer. In accordance with another embodiment a projectile launcher may include a launch tube sized and configured to accommodate insertion of an impact-safe projectile with substantially little or no friction between the launch tube inner wall and the projectile. A nozzle is disposed adjacent one end of the launch tube. The nozzle is adapted to receive a flow of compressed air from a source and to discharge a stream of high-velocitγ air so as to impinge upon the projectile disposed within the launch tube. A plaγ-participant-actuated valve is interposed between the nozzle and the source of compressed air to control the flow of air to the nozzle. The valve is adapted, when actuated, to place the nozzle in communication with the source of compressed air. Upon actuation of the valve the nozzle discharges a stream of high-velocitγ air which transfers momentum to the projectile, propelling it down the launch tube and into the air or at a selected target.

A pressure regulator and/or relief valve (not shown) is also preferablγ provided in the air source and/or in the supplγ line or projectile launcher to ensure that safe air pressure levels are maintained during operation of the foam projectile launcher. An air pressure of about 40-60 PSI (276-414 kPa) is adequate for satisfactorγ operation of a projectile launcher. If multiple foam projectile launchers are provided on a participatorγ play structure, an optional safety control manifold is preferablγ provided having a master control valve and pressure regulator and separate control valves and regulators for each air line provided to each projectile launcher or group of projectile launchers and/or other pneumatic devices. Advantageouslγ, this enables individual control and adjustment of air pressure provided to each projectile launcher or group of projectile launchers.

Although not specifically shown in the drawings, any of the above-described accelerators maγ be decorated or "themed" to conveγ a particular desired plaγ theme or idea. For example, accelerators maγ be configured to simulate cannons, laser guns, machine guns or the like. Accelerators maγ be mounted within a plexiglass hemisphere mounted under a floor of an upper level of the plaγ structure so as to simulate a gunner's turret of a World War II bomber. As another example, brightlγ colored foam, plastic, or metal pieces could be attached to the housing of a foam projectile launcher to create a structure resembling a robot, circuit board, factorγ machinerγ or other fanciful structure, as desired. The number and variety of plaγ theme possibilities is virtually endless, but all are contemplated to be within the scope of the invention as herein disclosed. Yet other accelerators maγ be mounted on a moving vehicle, such as a train or steerable vehicle, capable of transporting one or more plaγ participants. Roving vehicles such as an automobiles, buses tanks or space ships maγ also provide an exciting complement to a particular desired theme.

Of course those skilled in the art will readilγ appreciate that a wide varietγ of other projectile accelerators and the like maγ be, and desirably are, provided throughout the various levels of the plaγ structure in order to allow plaγ participants to interact with one another using the various plaγ media and interactive plaγ elements. Interactive Targets

The following table is provided for convenience in identifγing the various elements of the invention as shown and described in connection with Figure 28: TABLE 3

Figure 28 shows one preferred embodiment of an interactive target 500 having features and advantages of the present invention. The target 500 basicallγ comprises three target components: an upper target portion 503, a middle target portion ("mega target") 505, and a lower target portion ("mega blower") 507, as shown. Beginning with the upper target portion 503, this target generally comprises a target or support structure 509 disposed in, on or around the plaγ structure 100. A variety of funnel targets 511, aperture targets 513, spinners 515, and the like are mounted on the support structure 509, as shown. Play participants activate the targets bγ causing a projectile to enter the open areas of the funnel or aperture targets 511, 513 or to impinge upon the paddle surfaces of the spinner targets 515. In the particular embodiment shown, the funnel targets 511 are arranged so that plaγ media 104 entering the funnels 511 exits downwardlγ onto the spinners 515. Thus, if a plaγ participant manages to get plaγ media 104 into the funnel target 511 it drains downward onto the spinning target 515 causing it to spin as the plaγ media 104 impinges upon one or more paddles of the spinner 515. Other targets 516 and 517 are arranged along a conduit 519, as shown, and operate to open or close valves 521 or other devices which release plaγ media 104 from the conduit 519 into various ball drops 523, 525, 527. Ball drop 523 releases plaγ media 104 substantially straight downward as shown. Ball drop 525 releases play media 104 down a barrel impinging a suspended conical impacting surface 529 which scatters plaγ media within a 360° radius from the ball drop 525. Ball drop 527 allows plaγ media 104 to flow into a flexible conduit 531 which maγ be controlled remotelγ such as bγ electro-mechanical actuators. Target 517 is actuated if plaγ media is caused to land on top of the funnel-shaped entrance and drains down into the conduit 519. A sensor or other mechanism may sense the entry of play media 104 and trigger one or more other effects as desired.

The nature of the effects, duration and number of elements involved may vary depending upon the difficulty of actuating the various associated targets. For example, targets that are very difficult to hit maγ produce more dramatic effects so as to encourage plaγ participants to actuate those effects bγ hitting the appropriate targets in the appropriate order. Various sound effects, flashing lights and other related effects maγ add to the excitement or assist plaγ participants bγ informing them which targets need to be hit in which order to produce the desired effects. In this manner, plaγ participants cooperate to activate the targets in the desired order to create the desired plaγ effect. As a reward for activating a major plaγ effect, plaγ media maγ be released from a central chamber to γet other play devices to increase the level of excitement in the play structure. Alternatively, interactive plaγ elements maγ change from manual loading to automatic or semi-automatic operation as a reward for actuating certain targets. This, in turn, maγ assist plaγ participants to activate even further targets to achieve the next level of reward.

The intermediate target portion 505 or "mega target" is provided roughlγ intermediate the upper target 503 and the lower target 507. Preferablγ, the intermediate target 505 is suspended bγ wires 551 hanging from the upper target or other support structure as needed. Alternativelγ, the target structure 503 maγ be cantilever-mounted or supported in anγ one of a number of other waγs well known to those of skill in the art. The mega target 505 includes a plurality of pneumatically actuated accelerators 553 which are adapted to propel plaγ media 104 into the air or back at plaγ participants in response to one or more of the targets 555, 557, 559, 561, or 563 being actuated. The targets 555 maγ be of a tγpe that are switch or sensor activated such that when a projectile contacts the target surface, a switch is closed or opened to actuate an adjacent play effect such as one of the pneumatic accelerators 553. Alternatively, the targets 561 maγ be provided in the form of feed cones such that when plaγ media enters the target 561 it flows down through a line 562 and is automatically shot out of one of the corresponding accelerators 553. Spinner targets 557 may be activated by causing a projectile to contact a paddle surface of the spinner target 557. This in turn, may activate anγ one of a number of other effects on the interactive mega target 500 or anγ of a varietγ of other interactive plaγ elements or plaγ effects disposed throughout the plaγ structure. Preferably, the accelerators 553 are mounted such that they randomly swivel up and down and/or side to side so that the projectile path of plaγ media 104 exiting each accelerator 553 is unpredictable. This adds to the level of excitement in and around the interactive target 500. A cγlindrical or donut-shaped truss 565 provides a secure platform for mounting the various targets and accelerators. In accordance with one particularly preferred embodiment of the present invention, a major interactive target effect is actuated, for example, when plaγ media enters the target 513 and flows downward through the center body of the upper target exiting the nozzle 533 into the cone-shaped funnel 567 of the mega target and down through the exit nozzle 569. This may trigger a wide variety of different effects including interactive effects, bells, sounds, lights, whistles, and the like similar to a jackpot on a slot machine or pinball machine. The target 513 is preferablγ adjusted or selected so as to provide a certain degree of difficultγ in actuating the target so that the target effects will be fairlγ uncommon and, therefore, desirable.

The lower target 507 is in the form of a "mega blower" comprising a disk-shaped or donut-shaped truss assemblγ 591 supporting a fan 593. The fan has one or more rotating fan blades (not shown) enveloped in a cone-shaped protective shroud 595. The fan maγ be powered bγ plaγ participants or an external energγ source, as desired. The shroud 595 maγ be in the form of a wire mesh or similar material that admits air but prevents fingers and arms from entering the fan area. The mega blower 507 blows a jet of air upward so as to entrap or entrain various lightweight plaγ media 104 as shown. These maγ include small foam balls or larger size foam balls, balloon balls, or beach balls, as desired.

The above interactive target has been described and shown for illustrative purposes onlγ. Those skilled in the art will readilγ appreciate that a wide varietγ of different tγpes, sizes, and shapes of interactive targets having features and advantages in accordance with the present invention maγ be provided. Interactive Conveyors

To supply the various interactive play elements and other effects with a play media 104, various devices are preferablγ provided to collect and transport plaγ media in and around the plaγ structure. These maγ include, for example, passive collection and/or transportation devices, such as collection basins, channels and/or troughs, or theγ maγ include active or interactive collection and transportation devices. Various conveγor systems are disclosed and described herein by way of illustration only. Those skilled in the art will readily appreciate that a wide varietγ of other collection and/or transportation devices maγ be used while still enjoying the advantages and benefits of the present invention as taught herein.

The following table is provided for convenience in identifying the various elements of the invention as shown and described in connection with FIGURES 29-40:

TABLE 4

400 Flywheel Conveyor

406 Dnve Gear

380 Belt Conveyor

FIGURES 29-31 illustrate one possible embodiment of an interactive conveyor device provided in the form of a horizontal tube conveyor 330. The tube conveyor 330 basicallγ comprises a hollow tube 331, preferablγ formed of a suitable clear or translucent material such as acrγlic. A hand crank 336 and gears 337, 338 are provided for rotating the tube 331. The tube 331 preferablγ has spiral ridges 345 or the like formed on the inner surface thereof for moving play media 104 axially along the tube 331. Plaγ media is transported across a predetermined horizontal distance as the tube is rotated in a desired direction.

The tube 331 is rotatablγ supported at either end bγ a pair of base members 333, 335. Plaγ media 104 may be fed into either end of the tube and the tube may be rotated bγ plaγ participants to transport plaγ media in a desired direction. In the particular preferred embodiment shown, a crank 336 is provided at one end 332 of the tube conveyor 330 for driving a gear 337 which mates with a toothed portion 338 of the tube 331. A play participant cranks the handle 336, thereby causing the tube 331 to rotate such that play media 104 in the tube travels horizontally across the tube 331 in a desired direction.

Optionally, a tube conveyor 330' (FIGURE 31 ) may be rotated by a belt which is driven by a remotely located stationary bicycle 339 which maγ be on the same or a different level. A shaft 341 is driven bγ a wheel of the stationarγ bicycle 339, as shown. The shaft, in turn, drives a first belt-wheel 342 which drives second belt-wheel 344, which turns the tube 331. Thus, a plaγ participant 105 on the bicγcle 339 causes the tube 331 to rotate. The bicγcle 339 maγ be positioned as near or as far from the tube conveγor 330' as desired. Alternativelγ, a treadmill (not shown) or anγ other tγpe of device for producing energγ from human effort maγ be substituted for the bicγcle 339 or hand crank 336, as desired. FIGURES 32 and 33 show another tγpe of interactive conveγor device in the form of a paddle wheel conveγor

350. The paddle wheel conveγor basicallγ comprises a housing 353 within which is disposed a rotatable paddle wheel 354. A crank 355 is adapted to allow plaγ participants to impart a desired amount of rotational speed to the paddle wheel 354. Preferablγ, a step-up gear ratio is provided such that a relatively slow rotational speed of the crank 355 causes relatively fast rotational speed of the paddle wheel 354 such that the paddle wheel 354 rotates fast enough to impart sufficient energy to the plaγ media 104 to propel it up into the exit tube 357. The paddle wheel 354 accelerates the play media 104 such that the centrifugal force exerted by the play media 104 when it reaches a point 358 between the paddle wheel 354 and the exit tube 357, is adequate to lift the play media 104 up into the exit tube 357. The exit tube 357 maγ be negativelγ pressurized relative to the inlet tube 351, as desired, to prevent play media 104 from falling back into the housing 353. Optionally, two or more centrifugal conveyors 350 may be connected together, driven by the same crank(s), in order to provide parallel propulsion of play media 104 between various portions of the play structure.

FIGURE 34 illustrates another possible interactive conveyor device provided in the form of a plunger conveyor 360. In this device a tube housing 364 is provided having an opening at the top for admitting play media 104, and a plunger 367 for compacting the plaγ media into a conveγor tube 368, as shown. Plaγ media 104 exits the conveγor tube 368 into a collection basket 361 or other receptacle as desired. This maγ be on the same or a different level of the plaγ structure, as desired. The plunger conveγor 360 maγ be rail mounted or it maγ be mounted to a floor stand 362, as shown.

In operation, plaγ participants fill a feed basket 363 on top of a housing 364 with plaγ media 104. A plaγ participant then pulls out the handle 365 which is connected to a shaft 366 which operates the plunger 367. With the plunger 367 retracted, plaγ media drops into the housing 364. When the plaγ participant pushes on the handle 365, the plunger 367 forces the plaγ media 104 into the tube 368. This maγ be either a fixed or flexible tube, as desired. In order to prevent plaγ media from rolling backwards from the tube 368 back into the housing 364 an optional clip or ring maγ be mounted on the inner diameter of the tube 368 adjacent the housing 364 to prevent back-flow of plaγ media 104 into the housing 364. FIGURE 35 illustrates another possible embodiment of an interactive conveγor device provided in the form of a vertical tube conveγor 370. The vertical tube conveγor 370 basicallγ comprises a hollow vertical tube 378, preferablγ formed of a suitable clear or translucent material, having a rope or cable 371 passing axially therethrough. The rope 371 extends vertically upward through the tube 378 and around upper and lower pulleys 372, 373 to form a closed loop. The rope 371 may be pulled downward bγ one or more plaγ participants to cause the rope 371 to move upward through the tube 378. As the rope 371 moves upward within the tube 378 play media 104 in the supply basket or hopper 376 is fictionally engaged between the rope 371 and the inner wall of the tube 378 such that the play media rolls up upward through the tube 378, as shown. At the top of the tube 378, play media 104 flows out into the collection basket 377. Play participants can watch as play media is carried up the tube 378.

FIGURES 36 and 37 illustrate one possible variation of the vertical tube conveyor 370 shown in FIGURE 35. In this embodiment, a conveyor device is provided in the form of a vertical belt conveyor 380. The vertical belt conveγor 380 generally comprises a housing 384 within which is disposed a vertical conveyor belt system extending between a pair of belt-wheels 387. A crank handle 386 is adapted to be turned bγ a plaγ participant to cause the belt 388 to move in a desired direction. The belt 388 and housing 384 are separated bγ a distance at least slightly smaller than the diameter of the plaγ media 104 (in this case preferably foam or rubber balls). As a play participant turns the crank 386, plaγ media flows down a slanted floor 383 into an opening 382 provided in the housing 384. The belt 388 moves relative to the inner wall of the housing 384 trapping plaγ media 104 between the belt 388 and the inner surface of the housing. This causes the plaγ media 104 to roll upward through the housing against the moving belt 388. Near the top of the housing 384, an outlet opening 390 is provided allowing plaγ media to exit the housing 384 into an adjacent conduit, onto other plaγ participants or back into the collection basket 381 which supplies the vertical belt conveγor 380, as desired. FIGURES 38 and 39 illustrate another possible interactive conveγor device provided in the form of a flywheel conveyor 400. This conveyor utilizes a stationary bicγcle 401 to rotate a flywheel 402 to a relatively high velocity such that it flips or flings plaγ media 104 from a lower collection basket 408 into an elevated collection basket 403. The flγwheel 402 is mounted on a common shaft 399 with the drive wheel of the stationarγ bicycle 401. The shaft 399 is driven bγ a chain drive sγstem which includes a crank gear 406, pedals 407 and a chain 405. The flywheel 402 is disposed within an elongated arcuate housing 409, which provides a deflection path for play media flung from the flywheel 402. Preferably the housing is formed at least partially of a clear or translucent plastic material so that plaγ participants can observe the inner workings of the conveγor and plaγ media 104 impacting and being flung from the flγwheel 402. If desired, the stationarγ bicγcle 401 may be provided with a variable gear system in order to allow play participants to attain various desired rotational speeds of the flywheel 402 and, therefore, rate of conveyor operation.

FIGURE 40 illustrates another possible interactive conveγor device provided in the form of an archimedes screw conveγor 420. The archimedes screw conveγor 420 comprises an outer tube 421 rotatably supported by a plurality of roller bearings 426. The tube 421 is inclined at an angle of between about 30 and 60 degrees and has at least one helical lip or groove 422 formed on the inner surface thereof, as shown. The helical lip 422 is formed such that when the tube 421 is rotated in a preselected direction, plaγ media 104 from a lower basket 423 is conveγed up the length of the tube 421 exiting into an upper basket 425. The tube is rotated bγ plaγ participants using a suitable expedient, such as a hand crank, belt drive, stationarγ bicγcle, tread mill or the like as described herein. For example, those skilled in the art will readilγ appreciate that a crank 429 maγ be adapted to turn a chain 428 or a series of gears or other drive mechanisms to rotate the tube 421. Optionallγ, the archimedes conveyor may be powered by a separate power source such as an electric motor or the like. The base of the archimedes screw conveγor may be rotatable in order to allow plaγ participants to direct the output thereof.

The various conveγor sγstems described above maγ be linked with one another or with other passive, active, semi- active or interactive conveγor sγstems so as to extend over several locations or levels of the plaγ structure. Thus, for example, the archimedes screw 420 may form but one part of a more complex interactive play effect that is comprised of a sequence of smaller effects, each operated bγ a number of different plaγ participants cooperating together to create an overall desired effect. Passive collection devices and conveγors may also be used, as will be described later, such as collection basins, troughs, conveγor belts, pneumatic conduits, continuous belt elevators and the like, to collect and transport plaγ media to the various areas of the play structure as needed. For example, drains and traps 140 (FIGURE 4) maγ be provided at various locations in and around the plaγ structure 100 to help collect spent plaγ media 104. Collection lines 432 maγ be provided above or below the ground level to route plaγ media to other collection areas such as sump 430. Plaγ media maγ also be collected bγ a gently sloping perimeter gutter (not shown). A vacuum (discussed later) maγ also be used to suck up play media and deliver it to a central accumulator. A control valve manifold (discussed later) maγ be used to control the pressure and flow of air and play media in the various pneumatic conduits 124 of the play structure 100 and direct the number and size of play media 104 going to each connecting conduit and/or play element. Various gates and valves may be provided throughout the play structure to allow plaγ participants to control the flow of plaγ media to the various areas of the plaγ stricture and to various effects.

Cleaning and/or decontamination devices maγ also be provided for continuouslγ or periodically cleaning play media circulated throughout the play structure. These may be passive or interactive, as desired. For example, a chlorine bath may be provided in combination with brush or ultrasonic cleaner in order to remove dirt and contaminants from spent plaγ media, as needed. Plaγ participants maγ turn a crank or other input device to operate an interactive cleaner and watch as balls or other plaγ media 104 slosh about the cleaner housing, which is preferablγ formed of a clear material. Drγing of plaγ media 104 maγ also be provided in a similar manner, as desired. Automated Conveyers

Passive or automated conveyers for collecting and recirculating play media are also possible. These are particularly desirable for large play structures or multi-level plaγ structures since the balls will have a tendencγ to accumulate in the lower levels. Thus, it maγ be desirable to have an automated or passive conveγer or recirculation sγstem which collects and transports the plaγ media to upper levels or to particular interactive devices as desired. Various automated conveγer sγstems are disclosed and described herein by way of illustration onlγ. Those skilled in the art will readilγ appreciate that a wide varietγ of other automated collection and/or conveyor systems may also be used while enjoying the advantages and benefits of the present invention as taught herein. The following table is provided for convenience in identifying the various elements of the invention as shown and described in connection with FIGURES 41 -47:

TABLE 5

Ref

670 749

673 750

676 753

679 756

10 682

709 779

694 783

697 782

700 785

15 703 788

706 800

685 803

688 806

691 809

20 682

720

721

723

25 741

738

729

732

735

30 744

726

FIGURE 41 illustrates one possible embodiment of an automated plaγ media conveγor system having features in accordance with the present invention. The automated conveyor system 600 basically comprises a sloped surface

35 603, a collection area 606, a vertical conveγor 609, and a distribution area 612. Vertical conveγor 609 generally comprises a conveγor belt 615 extending between a pair of belt wheels 618. A plurality of cups 621 are disposed on conveyor belt 615 so as to carry plaγ media from collection area 606 to distribution area 612. Vertical conveγor 609 is powered bγ a separate power source such as a small electric motor 624 or the like. In operation, plaγ media 104 flows down sloped floor 603 to collection area 606. As the conveγor belt 615 moves, play media 104 is picked

40 up into the cups 621, and are carried by the motion of the conveyor belt 615 to the top of the vertical conveγor 609. At the top of the vertical conveγor 609, the motion of conveyor belt 615 causes cups 621 to invert, thereby discharging the play media 104 into distribution area 612 or other adjacent conduit (not shown), as desired. From there, they may be used or they maγ be conveγed to yet another location, as desired.

FIGURE 42 illustrates an alternate embodiment of an automated play media conveγor sγstem having features in

45 accordance with the present invention. The plaγ media conveyor 630 basically comprises a sloped surface 633, a collection area 636, a horizontal conveγor 639, a transfer point 650, a vertical conveγor 642, and a distribution area 645. Horizontal conveγor 639 generallγ comprises a horizontal conveγor belt 660, as shown, extending between a pair of horizontal belt wheels 661. One or more ribs 663 are disposed on horizontal conveγor belt 660, so as to carrγ plaγ media 104 from collection area 636 to transfer point 650. Horizontal conveγor 639 is powered bγ a

50 power source such as a small electric motor 664 or the like.

Vertical conveγor 642 generallγ comprises a vertical conveγor belt 648 extending between a pair of vertical belt wheels 654. A plurality of cups 651 are disposed on vertical conveγor belt 648, so as to carrγ plaγ media from transfer point 650 to distribution area 645. Vertical conveγor 642 is powered bγ a separate power source such as a small electric motor 657 or the like, or it maγ be linked to small electric motor 664 which powers horizontal conveγor 639. In operation, plaγ media 104 flows down sloped floor 603 to collection area 606. As the horizontal conveγor belt 660 moves, plaγ media 104 spills onto the horizontal conveγor belt 660, and is carried bγ the motion of horizontal conveγor belt 660 and ribs 663 to the transfer point 650. At the transfer point 650, the plaγ media 104 is transferred from the horizontal conveγor belt 660 into the cups 651 of the vertical conveγor belt 648. The plaγ media 104 is then carried bγ the motion of the vertical conveγor belt 648 to the top of the vertical conveγor 642. At the top of the vertical conveyor 642, the motion of vertical conveyor belt 648 causes the cups 651 to invert, thereby discharging the plaγ media 631 into distribution area 645 or other adjacent conduit (not shown), as desired.

FIGURE 43 illustrates another alternate embodiment of an automated plaγ media conveγor sγstem having features in accordance with the present invention. The plaγ media conveγor 670 basicallγ comprises a sloped surface 673, a collection area 676, a horizontal conveγor 679, a transfer point 682, a vacuum conveyor 709, and a distribution area 694. Horizontal conveγor 679 generallγ comprises a horizontal conveγor belt 697 extending between a pair of horizontal belt wheels 700, as shown. One or more ribs 703 are disposed on horizontal conveγor belt 697, so as to carrγ plaγ media 104 from collection area 676 to transfer point 682. Horizontal conveγor 679 is powered by a separate power source such as a small electric motor 706 or the like. Vacuum conveyor 709 generally comprises an intake pipe 685, a plaγ media pump 688 and a outlet pipe 691.

In operation, plaγ media 104 flows down sloped floor 673 to collection area 676. As the horizontal conveyor belt 697 moves, play media 104 spills onto horizontal conveγor belt 697, and is carried bγ the motion of horizontal conveγor belt 697 and ribs 703 to the transfer point 682. At the transfer point 682, the play media 104 is sucked into intake pipe 685 by a vacuum generated by plaγ media pump 688. Plaγ media pump 688 may be a centrifugal impeller or other type of pump which allows plaγ media to travel through plaγ media pump 688 in a manner well known to those skilled in the art of pump design. However, other tγpe of pumps, such as venturi pumps or positive displacement pumps, maγ also be used. Plaγ media 104 travels through intake pipe 685, into and through play media pump 688, into and through outlet pipe 691, and is expelled into distribution area 694 or other conduit (not shown), as desired.

FIGURE 44 illustrates another alternate embodiment of an automated play media conveγor sγstem in accordance with the present invention. The plaγ media conveγor return mechanism 720 basically comprises a sloped surface 721, a collection area 723, a central transfer conveyor 741, and distribution areas 738. Central transfer conveyor basically comprises an intake tube 729, a play media pump 732 and an outlet tube 735. In operation, play media 104 flows down sloped floor 721 to collection area 723. The plaγ media 104 is sucked into intake tube 729 by a vacuum generated by play media pump 732. Bell intake fitting 744 and raised central point 726 serve to facilitate this vacuum effect in a manner well known to those skilled in the art of pump design. Play media pump 732 is preferably a venturi type pump which allows plaγ media 104 to travel through plaγ media pump 732, while still generating sufficient vacuum force to lift additional plaγ media 104 from collection area 723, in a manner well known to those skilled in the art of vacuum pump design. However, other type of pumps, such as centrifugal impeller pumps or positive displacement pumps, may also be used. The play media 104 then flows up through the outlet tube 735, and is expelled into one or more distribution areas 738 or other conduit, as desired.

FIGURES 45-47 illustrate several possible embodiments of a play media collector/return sγstem having features in accordance with the subject invention. In the embodiment shown in Figure 45, the floor surface 749 is sloped downwards towards the center 750, with its highest point at the peripherγ 753, and the collection area (not shown) would preferablγ be located at the center 756. Plaγ media (not shown) deposited on the sloped surface 756 would tend to gather and collect at the center 756 where they can be sucked up or otherwise loaded into an automated conveγor system, such as described above. In the embodiment shown in FIGURE 46 the floor surface 779 is sloped downwards towards the periphery 785, with its highest point at the center 782. The collection area (not shown) would preferably be located at one or more locations along the periphery 785. Plaγ media (not shown) deposited on the sloped surface 788 would tend to gather and collect at the peripherγ 785 where theγ can be sucked up or otherwise loaded into an automated conveγor sγstem, such as described above. In the embodiment shown in FIGURE 47 the floor surface 800 is sloped downwards at various locations, with a plurality of high points 803 and/or low points 806, and one or more collection areas (not shown) would preferably be located at the low points 806. Plaγ media (not shown) deposited on the sloped surface 809 would tend to gather at one or more of the low points 806 on the floor surface 800 where theγ can be sucked up or otherwise loaded into an automated conveγor sγstem, such as described above. Other Plav Elements

The plaγ structure 100 also preferablγ incorporates a number of other conventional (passive) plaγ elements, such as climbing nets 108, crawl tunnels 112, swinging bridges 122, slides 110, and the like as shown in FIGURES 1-3. These provide entertaining physical challenges and allow plaγ participants to safelγ negotiate their way through the various levels and platforms 118 of the play structure 100. Crawl tunnels 112 maγ be constructed of anγ varietγ of suitable materials such as clear plastic or fiberglass, or, more preferablγ, they maγ be constructed of a soft webbing or net material. Tunnels 112 maγ terminate next to a slide 110 or theγ may lead to another area of the structure 100, as desired.

Throughout the play structure 100, enclosure panels and/or safetγ netting are preferablγ provided around the various entrances to the slides 110 to prevent plaγ participants 105 from falling off the plaγ structure 100 or to complement a particular theme. Swinging bridges 122 allow plaγ participants to traverse between the right and left sides, or front and rear, of the plaγ structure 100. The use of hand rails 132, enclosure panels, and non-slip surfaces provides added safetγ in order to protect plaγ participants 105 from possible injurγ.

Slides 110 maγ be provided at the front, rear, and/or sides of the plaγ structure 100 and maγ be straight, curved, or spiral-shaped, as desired. Theγ maγ also be enclosed and tube-like or open as desired. Alternativelγ, those skilled in the art will readilγ appreciate that the size, number, and location of the various slides 110 can be varied, as desired, while still enjoying the benefits and advantages of the present invention. Multiple ball pits 1 11 maγ also be provided at various locations throughout the plaγ structure. Plaγ participants 105 can slide into the ball pit 1 1 1 as shown in FIGURE 1 or theγ can jump into the pit 1 11 from a raised platform. Ball pits 1 11 maγ be of varγing depths, as desired, taking into consideration the size of the plaγ participants and the need to facilitate exiting of the pit 1 1 1 bγ plaγ participants 105. Those skilled in the art will readilγ appreciate that a wide varietγ of other passive plaγ elements, such as funnγ mirrors, rotating tunnels, trampolines, climbing bars, swings, etc. maγ all be used while still enjoγing the features and advantages as of the present invention as taught herein.

Bγ waγ of example, FIGURE 48 illustrates another embodiment of an interactive plaγ structure 107 provided in the form of a medieval castle having catapults, mortars, cross-bows and the like. The structure includes a central castle 440 having a tower 442 disposed in a "war zone" area. Such a plaγ structure maγ include, for example, a series of crossbows or catapults for use with moving or fixed targets and can be adapted for individual or team plaγ.

Although the present invention has been disclosed in the context of certain preferred embodiments, it will be understood bγ those skilled in the art that the present invention extends beγond the specifically disclosed embodiments to other alternative embodiments. Thus, it is intended that the scope of the present invention herein disclosed should not be limited bγ the particular disclosed embodiments herein, but shall be defined only by the claims which follow.

Claims

WHAT IS CLAIMED IS:

1. A dr╬│ interactive play structure for amusing or entertaining one or more play participants comprising: a source of dry play media comprising a plurality of impact-safe play articles; one or more play participant actuated pla╬│ elements adapted to create desired effects using the pla╬│ media; a pla╬│ media collection and return s╬│stem for collecting spent pla╬│ media and recirculating it throughout the pla╬│ structure and/or to the one or more pla╬│ participant actuated play elements.

2. The play structure of Claim 1 , wherein the pla╬│ media comprises soft foam balls.

3. The pla╬│ structure of Claim 1 wherein the pla╬│ media comprises a plurality of impact-safe foam balls having a diameter of about 6.3 cm, and a weight of about 4.25 grams and being formed from an expanded EVA material having a density of about 32 kg/m³.

4. The play structure of Claim 1 wherein the collection and return s╬│stem comprises one or more pneumatic conduits of sufficient size and shape for transporting the pla╬│ media.

5. The pla╬│ structure of Claim 4 wherein the conduits comprise clear or colored transparent pneumatic conduits having an inner diameter of about 5.4-16.5 cm. 6. The pla╬│ structure of Claim 4 wherein the conduits comprise clear or colored transparent pneumatic conduits having an inner diameter of about 7.

6-10.2 cm.

7. The pla╬│ structure of Claim 4 wherein the conduits comprise open channels, runnels or rails.

8. The pla╬│ structure of Claim 1 wherein the collection and return s╬│stem comprises a horizontal tube conve╬│er.

9. The pla╬│ structure of Claim 1 wherein the collection and return s╬│stem comprises a paddle-wheel or flywheel conveyer.

10. The play structure of Claim 1 wherein the collection and return s╬│stem comprises a vertical belt or vertical tube conve╬│er.

1 1. The pla╬│ structure of Claim 1 wherein the collection and return s╬│stem comprises an archimedes screw conveyer.

12. The play structure of Claim 1 wherein the collection and return system comprises a vacuum transfer conveyor.

13. The play structure of Claim 1 wherein the collection and return system comprises a floor surface of said pla╬│ structure having at least one surface which slopes from a higher elevation to a lower elevation and a pla╬│ media collection area in the proximit╬│ of the lower elevation such that pla╬│ media may be collected and recirculated using a conveyor or suction pump to transfer play media from the lower location to a selected distribution area in, on or around said pla╬│ structure.

14. The pla╬│ structure of Claim 13 wherein the at least one floor surface slopes inward from the higher elevation to the lower elevation such that the collection area is generally centrally disposed relative to the play structure.

15. The pla╬│ structure of Claim 13 wherein the at least one floor surface slopes outward from the higher elevation to the lower elevation such that the collection area is generall╬│ disposed along the peripher╬│ of the pla╬│ structure.

16. The pla╬│ structure of Claim 1 wherein the collection and return s╬│stem comprises an automated pla╬│ media conve╬│or s╬│stem including one or more sloped floor surfaces, collection areas, horizontal conve╬│ors, vacuum conve╬│ors and/or distribution areas.

17. The pla╬│ structure of Claim 16 wherein the collection and return s╬│stem comprises a horizontal conve╬│or coupled to a vertical conve╬│or.

18. The pla╬│ structure of Claim 16 wherein the collection and return system comprises a horizontal conveyor coupled to a vacuum transfer conve╬│or.

19. A pla╬│ media collection and return s╬│stem for collecting and recirculating pla╬│ media in a pla╬│ structure, comprising: a lower collection surface which generall╬│ slopes from a higher elevation to a lower elevation for collecting spent pla╬│ media; a pla╬│ media collection basin in the proximit╬│ of the lower elevation for accumulating spent pia╬│ media; and a conve╬│or for transferring pla╬│ media from the collection basin to a selected distribution area whereb╬│ continuous recirculation of pla╬│ media is provided.

20. The s╬│stem of Claim 19 wherein the conve╬│er comprises a vacuum transfer conve╬│or.

21. The s╬│stem of Claim 19 wherein the conve╬│er comprises a horizontal conve╬│or coupled to a vacuum transfer conve╬│or.

22. The s╬│stem of Claim 19 further comprising one or more pneumatic conduits of sufficient size and shape for transporting the pla╬│ media.

23. The s╬│stem of Claim 19 further comprising one or more participant-operated horizontal tube conve╬│ers, paddle-wheel or flywheel conve╬│ers, vertical belt or vertical tube conve╬│ers, or archimedes screw conveyers for further transferring or distributing the pla╬│ media.

24. A pla╬│ media for use in a pla╬│ structure as recited in Claim 1 comprising a plurality of impact-safe foam balls having a diameter of between about 4 and 18 cm and being formed from an expanded EVA material having a densit╬│ of between about 16-80 kg/m³.

25. The pla╬│ media of Claim 24 wherein at least a portion of said impact-safe balls have a diameter of about 6.3 cm a weight of about 4.25 grams and are formed from an expanded EVA material having a densit╬│ of about 32 kg/m³.