US20020094891A1 - Multilayer impact resistant hockey stick - Google Patents
Multilayer impact resistant hockey stick Download PDFInfo
- Publication number
- US20020094891A1 US20020094891A1 US09/760,018 US76001801A US2002094891A1 US 20020094891 A1 US20020094891 A1 US 20020094891A1 US 76001801 A US76001801 A US 76001801A US 2002094891 A1 US2002094891 A1 US 2002094891A1
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- US
- United States
- Prior art keywords
- impact resistant
- energy absorbing
- shaft
- layer
- absorbing layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229920000515 polycarbonate Polymers 0.000 claims description 17
- 239000004417 polycarbonate Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 239000002023 wood Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920000271 Kevlar® Polymers 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003522 acrylic cement Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000288673 Chiroptera Species 0.000 description 1
- 229920004142 LEXAN™ Polymers 0.000 description 1
- 229920002063 Sorbothane Polymers 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
- A63B59/70—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00 with bent or angled lower parts for hitting a ball on the ground, on an ice-covered surface, or in the air, e.g. for hockey or hurling
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/0054—Features for injury prevention on an apparatus, e.g. shock absorbers
- A63B2071/009—Protective housings covering the working parts of the apparatus
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/24—Ice hockey
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
Definitions
- the present invention relates generally to hockey sticks, and more particularly to a hockey stick having improved impact resistance and energy absorbing characteristics.
- One particular aspect of sports equipment design is focused on strengthening particular structural components of the equipment. This type of development may be applied to a variety of sporting events which utilize shafts such as bats, rackets, and sticks. For example, such shafts are utilized in hockey, baseball, lacrosse, and tennis, among others.
- Hockey is one sport in which equipment design has continued to develop. Although the functionality of a hockey stick has remained constant over time, the design and manufacture of hockey sticks has continued to progress and change due to the variety of materials now being used in the industry. Materials used in the manufacturing of hockey sticks are modified not only due to the desired physical characteristics of the hockey sticks, but various performance characteristics as well.
- a hockey stick must be lightweight and have a strength substantial enough to endure the stresses that occur during use. More particularly, the hockey stick should be able to endure the primary stresses that develop in the shaft of the hockey stick, especially the maximum stress that occurs towards the shaft/blade interface when sticks come into contact in play.
- the flexibility of a hockey stick is an additional performance characteristic that is desirable, due to the importance of the hockey stick having the ability to provide enough “flex” during wrist shots and slap shots for the user to maximize shot velocity and control.
- Hockey sticks can be made from a variety of materials, including wood, aluminum, plastic, fiberglass, carbon, KEVLAR®, or combinations thereof. Traditionally, the selection of materials is primarily based on the weight, stiffness and cost of each of the materials. Composite shafts are somewhat expensive and have poor durability, but are still popular primarily due to their light weight. Wood shafts are relatively inexpensive, however, they are not especially lightweight, stiff or durable. Aluminum shafts are somewhat less reliable due to the fact that bending failures frequently occur within the shaft.
- One object of the present invention is to provide a shaft and a method for making the same which has a reinforced section that exhibits increased durability and strength.
- Another object of the present invention is to provide a shaft and method for making the same which has a reinforced section that includes an energy absorbing layer and an impact resistant layer.
- one aspect of the present invention provides a hockey stick and method of making the same that includes a shaft having a body, an energy absorbing layer and an impact resistant layer.
- the energy absorbing layer and impact resistant layer are applied to select areas of the shaft of the hockey stick which benefit from reinforcement or are prone to damage due to use.
- Another aspect of the present invention improves durability of lightweight hockey sticks, while at the same time maintaining the rectangular geometry of the stick. This is obtained by wrapping an energy absorbing layer around the body of the shaft and snapping or sliding an impact resistant sleeve around the energy absorption material and shaft body.
- FIG. 1 is a perspective view of a preferred embodiment of a hockey stick of the present invention having a reinforced portion of the shaft;
- FIG. 2 is a cross-sectional view taken along section line 2 - 2 of FIG.
- FIG. 3 a is a longitudinal cross-sectional view of the preferred embodiment of a hockey stick of the present invention 1 ;
- FIG. 3 b is a longitudinal cross-sectional view of an alternate embodiment of a hockey stick of the present invention.
- FIG. 3 c is a longitudinal cross-sectional view of another alternate embodiment of a hockey stick of the present invention.
- FIG. 4 a is a perspective view of the present invention demonstrating a method of applying the energy absorbing layer to the shaft body of the hockey stick;
- FIG. 4 b is an exploded view showing the relation of the impact resistant layer to the shaft body wrapped with the energy absorbing layer;
- FIG. 4 c is a perspective view of the present invention having the impact resistant layer outboard of the energy absorbing layer of the shaft body;
- FIG. 5 is an exploded view of a circumferentially enclosed polycarbonate sleeve positioned to be telescopically received by the shaft body;
- FIG. 6 is a cross-sectional view of yet another alternate embodiment of the present invention.
- FIG. 7 is a perspective view of still yet another alternate embodiment of the present invention.
- a hockey stick 10 is divided into three areas; a blade 12 , a shaft 14 and an end plug 16 . It is within each of these structural areas of the hockey stick 10 that various improvements are implemented in order to enhance the performance characteristics of the hockey stick 10 .
- the present invention focuses primarily on the shaft 14 of the hockey stick 10 and certain modifications therein.
- the shaft 14 of the hockey stick 10 has a first end 18 opposite a second end 20 .
- the first end 18 of the shaft 14 is found where the shaft 14 is coupled with the blade 12 of the hockey stick 10 .
- the second end 20 of the shaft 14 is found where the shaft 14 transitions to the end plug 16 .
- Many of the stresses that occur to a hockey stick during use occur at locations proximate to where the blade 12 and the shaft 14 meet. Stress regions are exhibited along the shaft 14 due to the large amount of stick-to-stick and stick-to-ice contact occurring during usage.
- One particular high stress region, known as the slash zone is located proximate the first end 18 of the shaft 14 . More specifically, the slash zone is located within the lower portion 22 of the shaft 14 .
- high stress regions primarily occur in the lower portion 22 of the shaft, occasional stress areas may occur within the upper portion 24 of the shaft 14 proximate the second end 20 due to player to player contact.
- FIG. 2 which is a cross-sectional view of the shaft 14 of hockey stick 10 taken along lines 2 - 2 of FIG. 1, a plurality of reinforcing layers surround the shaft 14 .
- the shaft 14 includes a body 26 longitudinally extending the entire length of the shaft 14 .
- the body 26 of hockey stick 10 can be comprised of various materials, which may include but are not limited to wood, composite, various metals, fiberglass, plastic, KEVLAR®, carbon and combinations thereof.
- An energy absorbing layer 28 is disposed on the outer surface of the body 26 .
- the energy absorbing layer 28 is a cushioning material which provides an energy absorption medium along prescribed regions of the shaft 14 .
- the energy absorbing layer 28 is preferably made of a viscoelastic material which may include but is not limited to a variety of viscoelastic damping polymers, such as VHB®, Sorbothane®, T-lastic®, etc.
- the energy absorbing layer 28 is preferably approximately 0.015 inches to 0.025 inches thick. Although this particular thickness is generally preferred, the thickness of the energy absorbing layer 28 may be varied according to the particular stresses expected to be endured.
- the preferred embodiment of the present invention employs 3M's VHB® tape as the energy absorbing layer.
- the VHB® tape is a double-sided viscoelastic tape 28 a having an acrylic adhesive 29 a , 29 b on each side.
- the acrylic adhesive is an aggressive adhesive which secures the energy absorbing layer 28 to the body of the shaft.
- VHB® tape is currently being used, alternate types of energy absorbing material may be used in combination with various adhesives, if desired.
- the outer perimeter of the shaft 14 is enclosed by an impact resistant layer 30 .
- the impact resistant layer 30 preferably has an annular or sleeve-like configuration.
- the impact resistant layer 30 is most preferably composed of a polycarbonate material, such as LEXAN® (available from the General Electric Company), although a polycarbonate/ABS blend may also be used.
- the impact resistant layer 30 is preferably approximately 0.010 inches to 0.020 inches thick.
- the impact resistant layer 30 is preferably transparent, although a tint or full color embodiment may also be employed. The design of the impact resistant layer 30 allows the sleeve to be applied to the shaft of the hockey stick relatively easy.
- One preferred embodiment provides a polycarbonate sleeve having a longitudinal slit 32 extending along the entire length of the sleeve.
- the longitudinal slit 32 provides a means for expanding the sleeve such that it snaps or slides over the shaft 14 of the hockey stick 10 .
- the impact resistant layer 30 preferably includes a slightly thicker portion of polycarbonate material adjacent the corners of the shaft 14 .
- the additional material present in the corners of the shaft 14 enhances protection to the hockey stick where impact is most likely to occur. This slight modification provides the impact resistant layer 30 with a more durable configuration.
- various decals or designs may be added to the body of the shaft.
- the preferred application of a decal is provided by bonding the decal onto the acrylic adhesive 29 a present on the outer surface of the energy absorbing layer.
- a transparent polycarbonate impact resistant layer 30 is then placed over the decal in order to provide impact resistance for the hockey stick 10 .
- the transparent polycarbonate layer allows the decal to be viewed through the sleeve.
- FIGS. 3 A- 3 C demonstrate various applications of the energy absorbing layer 28 and the impact resistant sleeve 30 to the shaft 14 of the hockey stick 10 and the various preferred embodiments.
- FIG. 3A is a longitudinal cross-sectional view illustrating the application of the energy absorbing layer 28 and the impact resistant layer 30 to the lower portion 22 of the shaft 14 .
- FIG. 3B is a longitudinal cross-sectional view illustrating the application of the energy absorbing layer 28 and the impact resistant layer 30 to the lower portion 22 and the upper portion 24 of the shaft 14 .
- FIG. 3C is a longitudinal cross-sectional view illustrating the extension of the energy absorbing layer 28 and the impact resistant layer 30 from the lower portion 22 through the upper portion 24 and along the end plug 16 .
- the energy absorbing layer 28 and the impact resistant layer 30 may be applied anywhere along the body 26 of the shaft 14 and at various lengths. Therefore, the length of the energy absorbing layer 28 and impact resistant layer 30 applied to the body 26 of the shaft 14 is preferably based upon the desired performance of the hockey stick 10 .
- FIGS. 4 A- 4 C A preferred method of preparing the present invention is illustrated in FIGS. 4 A- 4 C.
- a shaft body 26 which is usually rectangularly shaped, is provided.
- the energy absorbing layer 28 having a sheet-like configuration is applied to the shaft body 26 .
- the energy absorbing layer 28 has a width substantially the same as the circumference of the shaft body 26 .
- the length of the energy absorbing layer 28 may vary depending on the desired region of the shaft body 26 covered.
- the energy absorbing layer 28 is folded around the circumference of the shaft body 26 thereby providing a continuous layer around the wrapped region of the shaft body 26 , as seen in FIG. 4A.
- the wrapping of the double-sided viscoelastic tape 28 bonds the interior side of the viscoelastic tape 28 to the outboard surface of the shaft body 14 .
- Alternate methods may be used for applying the viscoelastic layer to the shaft body 14 , such as helically wrapping the viscoelastic tape in a longitudinal direction along the shaft.
- a decal or design bearing emblem may then be disposed on the outer surface of the viscoelastic tape.
- the bonding of the decal to the viscoelastic tape is preferably accomplished through use of the acrylic adhesive on the outer surface of the tape 28 .
- the impact resistant layer 30 is applied to the shaft body 14 .
- the impact resistant layer 30 is provided in the form of an annular sleeve 30 which is snapped over the body 26 of the shaft 14 by forcing the body 26 through the longitudinal slit 32 thereby expanding the sleeve.
- the longitudinal slit 32 provides a passage to an axial bore 34 formed throughout the impact resistant sleeve 30 for accommodating the shaft body 14 .
- a polyurethane tape 36 is placed along the longitudinal slit 32 to secure the placement of the impact resistant sleeve 30 .
- a section of polyurethane tape 36 may be applied around the opposing ends of the impact resistant sleeve in order to encapsulate the multilayered region of the shaft body.
- the layer 30 ′ takes the form of a circumferentially enclosed polycarbonate sleeve (not having a slit).
- the polycarbonate sleeve 30 ′ having an axial bore 34 ′ formed therethrough is telescopically slid over the shaft body 26 ′.
- Various lubricants may be used to assist in the receipt of the shaft body 26 ′ within the bore 34 ′ of the polycarbonate sleeve 30 ′.
- polyurethane tape 36 ′ may be used to affix the ends of the polycarbonate sleeve 34 ′ to the shaft body 26 ′.
- FIG. 6 illustrates a cross-sectional view of an alternate embodiment of the present invention which provides a shaft 14 ′′ of the hockey stick 10 ′′ having an impact resistant layer 30 ′′ applied directly on the body 26 ′′. This embodiment enhances the impact resistance of the shaft 14 ′′, without modifying the energy absorption characteristics of the shaft 14 ′′.
- a further alternate embodiment as seen in FIG. 7, provides a hockey stick 50 having a shaft 52 with a body 54 containing a recessed portion 56 annularly formed around the body 54 of the shaft 52 .
- the recessed portion 56 is provided for concentrically accommodating the energy absorbing layer 28 and impact resistant layer 30 along the body 54 of the shaft 52 .
- the application of the energy absorbing layer and the impact resistant layer form a small ridge around the exterior circumference of the shaft.
- the ridge formed by the ends of the energy absorbing layer and the impact resistant layer may be disfavored by certain players.
- the energy absorbing layer 28 and the impact resistant layer 30 are applied within the recessed portion 56 provided in the body 54 of the shaft 52 as previously described in the alternate embodiments.
- the depth of the recessed portion 56 is selected to match the thickness of the energy absorbing layer 28 and impact resistant layer 30 (and any adhesive used in combination therewith) if both layers are employed, or the impact resistant layer 30 (and any adhesive) if only the impact resistant layer 30 is employed.
- the recessed portion 56 of the body 54 provides the player with a planar shaft 52 .
- the recessed portion 56 is preferably formed when molding the shaft 52 although other methods such as grinding may be used.
Abstract
Description
- The present invention relates generally to hockey sticks, and more particularly to a hockey stick having improved impact resistance and energy absorbing characteristics.
- The popularity of sporting events in today's society has prompted a wide movement in the development of sports equipment. In most sporting events there is a need to develop equipment that exhibits maximum performance while minimizing production costs. One way of altering the development of equipment lies in the selection of materials used to manufacture the equipment. The combination of materials used to design a variety of sports equipment continues to provide advancements in the technology.
- One particular aspect of sports equipment design is focused on strengthening particular structural components of the equipment. This type of development may be applied to a variety of sporting events which utilize shafts such as bats, rackets, and sticks. For example, such shafts are utilized in hockey, baseball, lacrosse, and tennis, among others.
- Hockey is one sport in which equipment design has continued to develop. Although the functionality of a hockey stick has remained constant over time, the design and manufacture of hockey sticks has continued to progress and change due to the variety of materials now being used in the industry. Materials used in the manufacturing of hockey sticks are modified not only due to the desired physical characteristics of the hockey sticks, but various performance characteristics as well.
- A hockey stick must be lightweight and have a strength substantial enough to endure the stresses that occur during use. More particularly, the hockey stick should be able to endure the primary stresses that develop in the shaft of the hockey stick, especially the maximum stress that occurs towards the shaft/blade interface when sticks come into contact in play. The flexibility of a hockey stick is an additional performance characteristic that is desirable, due to the importance of the hockey stick having the ability to provide enough “flex” during wrist shots and slap shots for the user to maximize shot velocity and control.
- Hockey sticks can be made from a variety of materials, including wood, aluminum, plastic, fiberglass, carbon, KEVLAR®, or combinations thereof. Traditionally, the selection of materials is primarily based on the weight, stiffness and cost of each of the materials. Composite shafts are somewhat expensive and have poor durability, but are still popular primarily due to their light weight. Wood shafts are relatively inexpensive, however, they are not especially lightweight, stiff or durable. Aluminum shafts are somewhat less reliable due to the fact that bending failures frequently occur within the shaft.
- In view of the foregoing, it can be appreciated that there is a continuing need to develop hockey sticks which are inexpensive, lightweight, durable, impact resistant, and flexible. As the popularity of hockey continues, the technology of the equipment must continue to develop as well.
- One object of the present invention is to provide a shaft and a method for making the same which has a reinforced section that exhibits increased durability and strength.
- Another object of the present invention is to provide a shaft and method for making the same which has a reinforced section that includes an energy absorbing layer and an impact resistant layer.
- In particular, one aspect of the present invention provides a hockey stick and method of making the same that includes a shaft having a body, an energy absorbing layer and an impact resistant layer. The energy absorbing layer and impact resistant layer are applied to select areas of the shaft of the hockey stick which benefit from reinforcement or are prone to damage due to use.
- Another aspect of the present invention improves durability of lightweight hockey sticks, while at the same time maintaining the rectangular geometry of the stick. This is obtained by wrapping an energy absorbing layer around the body of the shaft and snapping or sliding an impact resistant sleeve around the energy absorption material and shaft body.
- Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood however that the detailed description and specific examples, while indicating preferred embodiments of the invention, are intended for purposes of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
- The various advantages of the present invention will become apparent to one skilled in the art by reading the following specification and subjoined claims and by referencing the following drawings in which:
- FIG. 1 is a perspective view of a preferred embodiment of a hockey stick of the present invention having a reinforced portion of the shaft;
- FIG. 2 is a cross-sectional view taken along section line2-2 of FIG.
- FIG. 3a is a longitudinal cross-sectional view of the preferred embodiment of a hockey stick of the
present invention 1; - FIG. 3b is a longitudinal cross-sectional view of an alternate embodiment of a hockey stick of the present invention;
- FIG. 3c is a longitudinal cross-sectional view of another alternate embodiment of a hockey stick of the present invention;
- FIG. 4a is a perspective view of the present invention demonstrating a method of applying the energy absorbing layer to the shaft body of the hockey stick;
- FIG. 4b is an exploded view showing the relation of the impact resistant layer to the shaft body wrapped with the energy absorbing layer;
- FIG. 4c is a perspective view of the present invention having the impact resistant layer outboard of the energy absorbing layer of the shaft body;
- FIG. 5 is an exploded view of a circumferentially enclosed polycarbonate sleeve positioned to be telescopically received by the shaft body;
- FIG. 6 is a cross-sectional view of yet another alternate embodiment of the present invention; and
- FIG. 7 is a perspective view of still yet another alternate embodiment of the present invention.
- Referring first to FIG. 1, a
hockey stick 10 is divided into three areas; ablade 12, ashaft 14 and anend plug 16. It is within each of these structural areas of thehockey stick 10 that various improvements are implemented in order to enhance the performance characteristics of thehockey stick 10. The present invention focuses primarily on theshaft 14 of thehockey stick 10 and certain modifications therein. - In general, the
shaft 14 of thehockey stick 10 has afirst end 18 opposite asecond end 20. Thefirst end 18 of theshaft 14 is found where theshaft 14 is coupled with theblade 12 of thehockey stick 10. Thesecond end 20 of theshaft 14 is found where theshaft 14 transitions to the end plug 16. Many of the stresses that occur to a hockey stick during use occur at locations proximate to where theblade 12 and theshaft 14 meet. Stress regions are exhibited along theshaft 14 due to the large amount of stick-to-stick and stick-to-ice contact occurring during usage. One particular high stress region, known as the slash zone, is located proximate thefirst end 18 of theshaft 14. More specifically, the slash zone is located within thelower portion 22 of theshaft 14. Although high stress regions primarily occur in thelower portion 22 of the shaft, occasional stress areas may occur within theupper portion 24 of theshaft 14 proximate thesecond end 20 due to player to player contact. - In order to improve the durability and impact resistance of the
hockey stick 10 at various stress regions along theshaft 14, it is desirable to apply supplemental layers. - As can be seen in FIG. 2, which is a cross-sectional view of the
shaft 14 ofhockey stick 10 taken along lines 2-2 of FIG. 1, a plurality of reinforcing layers surround theshaft 14. Theshaft 14 includes abody 26 longitudinally extending the entire length of theshaft 14. Thebody 26 ofhockey stick 10 can be comprised of various materials, which may include but are not limited to wood, composite, various metals, fiberglass, plastic, KEVLAR®, carbon and combinations thereof. - An
energy absorbing layer 28 is disposed on the outer surface of thebody 26. Theenergy absorbing layer 28 is a cushioning material which provides an energy absorption medium along prescribed regions of theshaft 14. Theenergy absorbing layer 28 is preferably made of a viscoelastic material which may include but is not limited to a variety of viscoelastic damping polymers, such as VHB®, Sorbothane®, T-lastic®, etc. Theenergy absorbing layer 28 is preferably approximately 0.015 inches to 0.025 inches thick. Although this particular thickness is generally preferred, the thickness of theenergy absorbing layer 28 may be varied according to the particular stresses expected to be endured. - The preferred embodiment of the present invention employs 3M's VHB® tape as the energy absorbing layer. The VHB® tape is a double-
sided viscoelastic tape 28 a having an acrylic adhesive 29 a, 29 b on each side. The acrylic adhesive is an aggressive adhesive which secures theenergy absorbing layer 28 to the body of the shaft. Although VHB® tape is currently being used, alternate types of energy absorbing material may be used in combination with various adhesives, if desired. - The outer perimeter of the
shaft 14 is enclosed by an impactresistant layer 30. The impactresistant layer 30 preferably has an annular or sleeve-like configuration. The impactresistant layer 30 is most preferably composed of a polycarbonate material, such as LEXAN® (available from the General Electric Company), although a polycarbonate/ABS blend may also be used. The impactresistant layer 30 is preferably approximately 0.010 inches to 0.020 inches thick. Furthermore, the impactresistant layer 30 is preferably transparent, although a tint or full color embodiment may also be employed. The design of the impactresistant layer 30 allows the sleeve to be applied to the shaft of the hockey stick relatively easy. One preferred embodiment, as described below, provides a polycarbonate sleeve having alongitudinal slit 32 extending along the entire length of the sleeve. Thelongitudinal slit 32 provides a means for expanding the sleeve such that it snaps or slides over theshaft 14 of thehockey stick 10. - As seen in FIG. 2, the impact
resistant layer 30 preferably includes a slightly thicker portion of polycarbonate material adjacent the corners of theshaft 14. The additional material present in the corners of theshaft 14 enhances protection to the hockey stick where impact is most likely to occur. This slight modification provides the impactresistant layer 30 with a more durable configuration. - In addition to the multiple layers described above, various decals or designs may be added to the body of the shaft. The preferred application of a decal is provided by bonding the decal onto the acrylic adhesive29 a present on the outer surface of the energy absorbing layer. A transparent polycarbonate impact
resistant layer 30 is then placed over the decal in order to provide impact resistance for thehockey stick 10. The transparent polycarbonate layer allows the decal to be viewed through the sleeve. - FIGS.3A-3C demonstrate various applications of the
energy absorbing layer 28 and the impactresistant sleeve 30 to theshaft 14 of thehockey stick 10 and the various preferred embodiments. - FIG. 3A is a longitudinal cross-sectional view illustrating the application of the
energy absorbing layer 28 and the impactresistant layer 30 to thelower portion 22 of theshaft 14. - FIG. 3B is a longitudinal cross-sectional view illustrating the application of the
energy absorbing layer 28 and the impactresistant layer 30 to thelower portion 22 and theupper portion 24 of theshaft 14. - FIG. 3C is a longitudinal cross-sectional view illustrating the extension of the
energy absorbing layer 28 and the impactresistant layer 30 from thelower portion 22 through theupper portion 24 and along theend plug 16. In general, theenergy absorbing layer 28 and the impactresistant layer 30 may be applied anywhere along thebody 26 of theshaft 14 and at various lengths. Therefore, the length of theenergy absorbing layer 28 and impactresistant layer 30 applied to thebody 26 of theshaft 14 is preferably based upon the desired performance of thehockey stick 10. - A preferred method of preparing the present invention is illustrated in FIGS.4A-4C. Initially, a
shaft body 26, which is usually rectangularly shaped, is provided. Next, theenergy absorbing layer 28 having a sheet-like configuration is applied to theshaft body 26. As seen in FIG. 4,A theenergy absorbing layer 28 has a width substantially the same as the circumference of theshaft body 26. The length of theenergy absorbing layer 28 may vary depending on the desired region of theshaft body 26 covered. Theenergy absorbing layer 28 is folded around the circumference of theshaft body 26 thereby providing a continuous layer around the wrapped region of theshaft body 26, as seen in FIG. 4A. The wrapping of the double-sided viscoelastic tape 28 bonds the interior side of theviscoelastic tape 28 to the outboard surface of theshaft body 14. Alternate methods may be used for applying the viscoelastic layer to theshaft body 14, such as helically wrapping the viscoelastic tape in a longitudinal direction along the shaft. - Although not shown in the figures, if desired, a decal or design bearing emblem may then be disposed on the outer surface of the viscoelastic tape. The bonding of the decal to the viscoelastic tape is preferably accomplished through use of the acrylic adhesive on the outer surface of the
tape 28. - Following the positioning of the viscoelastic tape and the application of the decal or design to the outer surface of the viscoelastic tape, the impact
resistant layer 30 is applied to theshaft body 14. Preferably, the impactresistant layer 30 is provided in the form of anannular sleeve 30 which is snapped over thebody 26 of theshaft 14 by forcing thebody 26 through thelongitudinal slit 32 thereby expanding the sleeve. As seen in FIG. 4b, thelongitudinal slit 32 provides a passage to anaxial bore 34 formed throughout the impactresistant sleeve 30 for accommodating theshaft body 14. Following the placement of the impactresistant sleeve 30 around thebody shaft 14 as seen in FIG. 4c, apolyurethane tape 36 is placed along thelongitudinal slit 32 to secure the placement of the impactresistant sleeve 30. A section ofpolyurethane tape 36 may be applied around the opposing ends of the impact resistant sleeve in order to encapsulate the multilayered region of the shaft body. - As seen in FIG. 5, an alternate embodiment impact
resistant layer 30′ and method for mounting thelayer 30′ to theshaft 14′ is illustrated. In this embodiment, thelayer 30′ takes the form of a circumferentially enclosed polycarbonate sleeve (not having a slit). Following the application of theviscoelastic tape 28′ and bonding of a decal (if desired), thepolycarbonate sleeve 30′ having anaxial bore 34′ formed therethrough is telescopically slid over theshaft body 26′. Various lubricants may be used to assist in the receipt of theshaft body 26′ within thebore 34′ of thepolycarbonate sleeve 30′. Upon the placement of theshaft body 26′ within thepolycarbonate sleeve 34′,polyurethane tape 36′ may be used to affix the ends of thepolycarbonate sleeve 34′ to theshaft body 26′. - FIG. 6 illustrates a cross-sectional view of an alternate embodiment of the present invention which provides a
shaft 14″ of thehockey stick 10″ having an impactresistant layer 30″ applied directly on thebody 26″. This embodiment enhances the impact resistance of theshaft 14″, without modifying the energy absorption characteristics of theshaft 14″. - A further alternate embodiment, as seen in FIG. 7, provides a
hockey stick 50 having ashaft 52 with abody 54 containing a recessedportion 56 annularly formed around thebody 54 of theshaft 52. The recessedportion 56 is provided for concentrically accommodating theenergy absorbing layer 28 and impactresistant layer 30 along thebody 54 of theshaft 52. In the previously described embodiments of the present invention, the application of the energy absorbing layer and the impact resistant layer form a small ridge around the exterior circumference of the shaft. Depending on the desired length of the specific layers applied, the ridge formed by the ends of the energy absorbing layer and the impact resistant layer may be disfavored by certain players. In order to obtain a coplanar (smooth) external surface along theshaft 52 of thehockey stick 50, theenergy absorbing layer 28 and the impactresistant layer 30 are applied within the recessedportion 56 provided in thebody 54 of theshaft 52 as previously described in the alternate embodiments. The depth of the recessedportion 56 is selected to match the thickness of theenergy absorbing layer 28 and impact resistant layer 30 (and any adhesive used in combination therewith) if both layers are employed, or the impact resistant layer 30 (and any adhesive) if only the impactresistant layer 30 is employed. As such, the recessedportion 56 of thebody 54 provides the player with aplanar shaft 52. The recessedportion 56 is preferably formed when molding theshaft 52 although other methods such as grinding may be used. - The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Claims (27)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/760,018 US20020094891A1 (en) | 2001-01-12 | 2001-01-12 | Multilayer impact resistant hockey stick |
PCT/US2002/000926 WO2002070080A1 (en) | 2001-01-12 | 2002-01-11 | Multilayer impact resistant hockey stick |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/760,018 US20020094891A1 (en) | 2001-01-12 | 2001-01-12 | Multilayer impact resistant hockey stick |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020094891A1 true US20020094891A1 (en) | 2002-07-18 |
Family
ID=25057796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/760,018 Abandoned US20020094891A1 (en) | 2001-01-12 | 2001-01-12 | Multilayer impact resistant hockey stick |
Country Status (2)
Country | Link |
---|---|
US (1) | US20020094891A1 (en) |
WO (1) | WO2002070080A1 (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
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US20040102263A1 (en) * | 2002-11-05 | 2004-05-27 | Ray Blotteaux | Impact layer technology shaft |
US20050064964A1 (en) * | 2003-09-19 | 2005-03-24 | Gary Filice | Sports equipment handle with cushion and grip ribs |
EP1566205A1 (en) * | 2004-02-19 | 2005-08-24 | Inda Nano Industrial Corp. | Blade member for a hockey stick |
US20050187045A1 (en) * | 2004-02-24 | 2005-08-25 | Shield Mfg. Inc. | Hockey stick shaft |
US20060217218A1 (en) * | 2005-03-24 | 2006-09-28 | Ponzini Richard J | Pressure grip for goalie hockey stick |
US20060293128A1 (en) * | 2003-11-19 | 2006-12-28 | Frischmon Timm J | Apparatus and method for repairing a hockey stick shaft |
US20070243957A1 (en) * | 2006-04-18 | 2007-10-18 | Henry Hsu | Buffering structure for hollow and tubular sport items |
US20070240799A1 (en) * | 2006-04-14 | 2007-10-18 | Hansen Greggery Eric | Golf shaft protector |
US20090291783A1 (en) * | 2008-05-23 | 2009-11-26 | Warrior Sports, Inc. | Lacrosse handle with gripping structure |
US20100029417A1 (en) * | 2008-07-31 | 2010-02-04 | Daiwa Seiko, Inc. | Sporting pipe |
JP2010035600A (en) * | 2008-07-31 | 2010-02-18 | Globeride Inc | Angle pipe |
JP2010035599A (en) * | 2008-07-31 | 2010-02-18 | Globeride Inc | Angle pipe |
US20100323830A1 (en) * | 2004-02-26 | 2010-12-23 | Sport Maska Inc. | Sports apparatus shaft and blade with added impact protection and method of making same |
US7862456B2 (en) | 2003-05-15 | 2011-01-04 | Easton Sports, Inc. | Hockey stick |
US7914403B2 (en) | 2008-08-06 | 2011-03-29 | Easton Sports, Inc. | Hockey stick |
US20110124446A1 (en) * | 2009-11-23 | 2011-05-26 | Entrotech Composites, Llc | Reinforced Objects |
US7963868B2 (en) | 2000-09-15 | 2011-06-21 | Easton Sports, Inc. | Hockey stick |
US20140066234A1 (en) * | 2011-11-30 | 2014-03-06 | Stephen Robert Lowden | Hockey stick shaft protector |
US20150072809A1 (en) * | 2013-09-09 | 2015-03-12 | Integran Technologies Inc. | Article with protective sheath |
US20150126309A1 (en) * | 2013-11-04 | 2015-05-07 | Bauer Hockey Inc. | Hockey stick or other sports implement |
US9586112B2 (en) * | 2015-07-24 | 2017-03-07 | Sport Maska Inc. | Ice hockey goalie stick and method for making same |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2487208A1 (en) * | 1980-07-07 | 1982-01-29 | Boniface Jacques | Hockey stick with head covered by a durable plastic - pref. polypropylene sheathed with polyurethane and moulded in situ |
DE3229854A1 (en) * | 1982-08-11 | 1984-02-16 | Reinhard 3170 Gifhorn Brettschneider | Games stick, in particular hockey stick |
CA2169216A1 (en) * | 1995-02-09 | 1996-08-10 | Richard A. Reed | Metalized hockey stick |
-
2001
- 2001-01-12 US US09/760,018 patent/US20020094891A1/en not_active Abandoned
-
2002
- 2002-01-11 WO PCT/US2002/000926 patent/WO2002070080A1/en not_active Application Discontinuation
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US7963868B2 (en) | 2000-09-15 | 2011-06-21 | Easton Sports, Inc. | Hockey stick |
US8216096B2 (en) | 2000-09-15 | 2012-07-10 | Easton Sports, Inc. | Hockey stick |
US8517868B2 (en) | 2000-09-15 | 2013-08-27 | Easton Sports, Inc. | Hockey stick |
US20040102263A1 (en) * | 2002-11-05 | 2004-05-27 | Ray Blotteaux | Impact layer technology shaft |
US7128669B2 (en) * | 2002-11-05 | 2006-10-31 | Sport Maska Inc. | Impact layer technology shaft |
US20060252585A1 (en) * | 2002-11-05 | 2006-11-09 | Ray Blotteaux | Impact layer technology shaft |
US7862456B2 (en) | 2003-05-15 | 2011-01-04 | Easton Sports, Inc. | Hockey stick |
US7201678B2 (en) | 2003-09-19 | 2007-04-10 | Easton Sports, Inc. | Sports equipment handle with cushion and grip ribs |
US20070010358A1 (en) * | 2003-09-19 | 2007-01-11 | Filice Gary W | Sports equipment handle and equipment associated therewith |
US20050064964A1 (en) * | 2003-09-19 | 2005-03-24 | Gary Filice | Sports equipment handle with cushion and grip ribs |
US20060293128A1 (en) * | 2003-11-19 | 2006-12-28 | Frischmon Timm J | Apparatus and method for repairing a hockey stick shaft |
EP1566205A1 (en) * | 2004-02-19 | 2005-08-24 | Inda Nano Industrial Corp. | Blade member for a hockey stick |
US20050187045A1 (en) * | 2004-02-24 | 2005-08-25 | Shield Mfg. Inc. | Hockey stick shaft |
US8052551B2 (en) * | 2004-02-26 | 2011-11-08 | Sport Maska Inc. | Sports apparatus shaft and blade with added impact protection and method of making same |
US20100323830A1 (en) * | 2004-02-26 | 2010-12-23 | Sport Maska Inc. | Sports apparatus shaft and blade with added impact protection and method of making same |
US20060217218A1 (en) * | 2005-03-24 | 2006-09-28 | Ponzini Richard J | Pressure grip for goalie hockey stick |
US7282001B2 (en) * | 2005-03-24 | 2007-10-16 | Ponzini Richard J | Pressure grip for goalie hockey stick |
US20070240799A1 (en) * | 2006-04-14 | 2007-10-18 | Hansen Greggery Eric | Golf shaft protector |
US20070243957A1 (en) * | 2006-04-18 | 2007-10-18 | Henry Hsu | Buffering structure for hollow and tubular sport items |
US20090291783A1 (en) * | 2008-05-23 | 2009-11-26 | Warrior Sports, Inc. | Lacrosse handle with gripping structure |
US7972227B2 (en) * | 2008-05-23 | 2011-07-05 | Warrior Sports, Inc. | Lacrosse handle with gripping structure |
JP2010035600A (en) * | 2008-07-31 | 2010-02-18 | Globeride Inc | Angle pipe |
US8047935B2 (en) * | 2008-07-31 | 2011-11-01 | Daiwa Seiko, Inc. | Sporting pipe |
US20100029417A1 (en) * | 2008-07-31 | 2010-02-04 | Daiwa Seiko, Inc. | Sporting pipe |
JP2010035599A (en) * | 2008-07-31 | 2010-02-18 | Globeride Inc | Angle pipe |
US7914403B2 (en) | 2008-08-06 | 2011-03-29 | Easton Sports, Inc. | Hockey stick |
US20110124446A1 (en) * | 2009-11-23 | 2011-05-26 | Entrotech Composites, Llc | Reinforced Objects |
US8747261B2 (en) * | 2009-11-23 | 2014-06-10 | Entrotech Composites, Llc | Reinforced objects |
US20140066234A1 (en) * | 2011-11-30 | 2014-03-06 | Stephen Robert Lowden | Hockey stick shaft protector |
US8905873B2 (en) * | 2011-11-30 | 2014-12-09 | Stephen Robert Lowden | Hockey stick shaft protector |
US20150072809A1 (en) * | 2013-09-09 | 2015-03-12 | Integran Technologies Inc. | Article with protective sheath |
US20150126309A1 (en) * | 2013-11-04 | 2015-05-07 | Bauer Hockey Inc. | Hockey stick or other sports implement |
US9586112B2 (en) * | 2015-07-24 | 2017-03-07 | Sport Maska Inc. | Ice hockey goalie stick and method for making same |
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