WO2004001322A2 - Stock module for modular stock system - Google Patents

Stock module for modular stock system Download PDF

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Publication number
WO2004001322A2
WO2004001322A2 PCT/US2003/019952 US0319952W WO2004001322A2 WO 2004001322 A2 WO2004001322 A2 WO 2004001322A2 US 0319952 W US0319952 W US 0319952W WO 2004001322 A2 WO2004001322 A2 WO 2004001322A2
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WO
WIPO (PCT)
Prior art keywords
stock
module
attachment
stock module
adjustable
Prior art date
Application number
PCT/US2003/019952
Other languages
French (fr)
Other versions
WO2004001322A3 (en
Inventor
Richard Fitzpatrick
Original Assignee
Richard Fitzpatrick
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Richard Fitzpatrick filed Critical Richard Fitzpatrick
Publication of WO2004001322A2 publication Critical patent/WO2004001322A2/en
Publication of WO2004001322A3 publication Critical patent/WO2004001322A3/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C23/00—Butts; Butt plates; Stocks
    • F41C23/14—Adjustable stock or stock parts, i.e. adaptable to personal requirements, e.g. length, pitch, cast or drop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C23/00—Butts; Butt plates; Stocks
    • F41C23/04—Folding or telescopic stocks or stock parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41C—SMALLARMS, e.g. PISTOLS, RIFLES; ACCESSORIES THEREFOR
    • F41C23/00—Butts; Butt plates; Stocks
    • F41C23/20—Butts; Butt plates; Mountings therefor

Definitions

  • the present invention relates to the filed of gunstocks and more particularly relates to stock modules for modular-style gunstocks, enabling a user to interchange different stock modules for different purposes.
  • Adjustable gunstocks are known in the prior art.
  • U.S. Pat. No. 4,735,007 to Gal (1988); U.S. Pat. No. 4,327,626 to McQueen (1982); U.S. Pat. No. 3,442,042 to Gilbert (1967); U.S. Pat. No. 3,348,328 to Roy (1966); U.S. Pat. No. 3,267,601 to Roy (1964); 3,137,958 to Lewis, et al. (1962); U.S. Pat No. 5,827,992 to Harris, et al. (1998) and U.S. Pat No. 2,900,877 to McClenahan (1956) are all illustrative of the prior art.
  • Fixed stocks are also well known in the prior art, predating adjustable stocks by centuries.
  • the current standard in automatic and semi-automatic rifles is to have a stock capable of receiving and covering a recoil absorption appendage, or "buffer tube”, shown in the '992 and '877 patents.
  • the most popular of the available adjustable stocks follow in form to the '328 patent, which is to say they use a spring loaded latch to bias a pin inside a provided adjustment hole.
  • a simple compression of the spring/latch assembly is all that is required to release the pin and, therefore, adjust the stock.
  • the '626 patent operates with a tooth-and-groove assembly which, otherwise, follows the same principles. In both cases, compression of the spring is necessary for adjustment in both directions along any length beyond the proximate hole/groove.
  • All of the adjustable stocks may have their butt portion removed, though they are not designed to have such a feature repeatedly used, much less have additional stock modules to exchange.
  • the user In those cases where the stock moves longitudinally along the weapon, with no other motion relative to the weapon, the user must make some sacrifice as to one, if not both, of two features. The user either loses constant and uniform cheek weld to the weapon or stock stability. The lack of uniform cheek weld can interfere with comfortable and precise use of the weapon. Stock stability can also interfere with precise weapon use. In all of these prior art stocks, the entire stock must be removed if the user wishes to change stock types.
  • the aforementioned inventions accomplish their individual objectives, they do not describe a truly modular stock, namely a stock where the butt portion is designed to be changed at the whim or need of the user. Likewise, they do not describe a stock that utilizes a cam/tension lock that enables the user to have not only a controlled extension, but also an unrestricted and silent compression and extension of the stock. None of the disclosed stocks have an adjustable preset lock to use in conjunction with an unrestricted adjustment. Finally, none of the disclosed stocks present a surface for a constant cheek weld while simultaneously having a sturdy, longitudinal adjustment capable stock, much less a uniform cheek weld with different stock types. In this respect, the gunstock according to the present invention departs substantially from the usual designs in the prior art. In doing so, this invention provides a modular gunstock allowing for a uniform and identical cheek weld for different stock modules, even while simultaneously adjusting the stock length of an adjustable stock module.
  • this invention provides an improved modular stock system.
  • the present invention's general purpose is to provide a new and improved stock system that will have interchangeable stock modules.
  • the stock module is used in conjunction with an attachment module that is installed on a firearm.
  • the attachment module is a replacement buffer tube, though for those weapons not requiring a buffer chamber a similarly shaped module may be used without a buffer tube feature.
  • the stock module is then slid onto the attachment module and secured.
  • the stock module cradles the attachment module, leaving one side of the attachment module exposed. In doing so, the upper surface of the attachment module is continually exposed regardless of the choice of stock module. This feature allows for a consistent cheek weld regardless of the choice of stock module and regardless of the length to which an adjustable stock module is set.
  • Figure 1 is a side elevation of a rifle with the attachment module as required by the present invention.
  • Figure la is the rifle of FIG. 1 with an adjustable stock module.
  • Figure lb is the rifle of FIG. 1 with a fixed stock module.
  • Figure lc is the rifle of FIG. 1 with a "shorty" fixed stock module
  • Figure 2 is a three staged side elevation showing the use of the adjustable stock embodiment.
  • Figure 3 is a side elevation of an adjustable stock module.
  • Figure 4 is cross-section view of the module of FIG. 6, taken along line 7.
  • Figure 5 is a side elevation depicting the use of the current standard adjustable stock.
  • Figure 6 is a side elevation depicting the use of the present invention with an adjustable stock module.
  • FIGS. 7a through 7e depict side elevations of suggested stock options.
  • Figures 8a through 8c are side elevations of a specialized stock option that has further modularity.
  • BEST MODE FOR CARRYING OUT THE INVENTION With reference now to the drawings, the preferred embodiment of the stock module is herein described.
  • an attachment module 2 is joined to a rifle 1 at the receiver.
  • the attachment module 2 has a flat uniform upper surface, or cheek plate 10, and an adjustment track 8 for use with adjustable for length stock modules.
  • Different stock modules 12 are depicted in FIGS, la - lc. All differences between the actual modules are specifically related to the type of stock desired by the user and can be of any design currently known in the prior art or later developed. What is being claimed is the structuring that enables these types of stocks to be used as modules for a modular stock system and not the individual types of stocks apart from the required structuring.
  • Figure 2 depicts the present invention in an adjustable stock embodiment in use.
  • Stock module 12 interfaces with attachment module 2 with cradle 14. Slots 9 are provided on attachment module 2 for the interface.
  • Cradle 14 is forward of stock portion 16.
  • Latching mechanism 24a, 24b, 24c interfaces with attachment module 2 on it bottom side, at rail track 8 and interface detents 7.
  • latching mechanism is a three-staged camming mechanism, such that it interfaces with both the rail track 8 and detents 7 in a first stage 24a, the detents alone in a second stage 24b, thereby allowing unilateral motion of the stock module 12, and neither rail track 8 nor detents 7 in a third stage 24c, allowing free motion.
  • FIG. 3 a specific stock module is depicted for illustration of all types of modules.
  • the depicted module is for an adjustable for length stock, though the structure involved as the claimed invention would be common to all such modules irrespective of actual stock type.
  • Other designs of stock modules may be seen in FIGS 7a- 7e and FIGS, l -lc.
  • Another modularity option is an expandable stock, depicted in FIG. 8.
  • the back plate of the stock can be removable, allowing for accessories, such as batteries or electronic equipment, to be installed within the stock itself.
  • Stock module 12 has a cradle interface 14 disposed towards the fore end of the module.
  • the module floor 20 and cradle walls 22 define cradle interface 14.
  • At the top of each cradle wall 22 is an attachment rib 18, designed to interface with attachment slots 9 located on attachment module 2, just beneath cheek plate 10.
  • At the forward end of cradle 14 is a space 26 for latching mechanism 24 to be inserted within stock module 12.
  • the underside of any type of stock module 12 may be configured with an attachment rail 28 so that other accessories may be mounted upon the stock module 12.
  • a securement means is also provided with each stock module. The type of means may also be dependent on the type of module. Adjustable modules, such as the one depicted in FIGS.
  • FIGS. 2a - 2c depict three stages in which the preferred adjustable stock latch is actuated.
  • a fixed stock such as the ones depicted in FIGS, lb and lc, are easily secured with a pin interface 11.
  • Figure 5 shows the prior art adjustable stock configuration. Notice that user 80 places cheek 82 against the weapon 84. Cheek 82 is positioned against the juncture of the fore 86 and hind 88 portions of the stock. This not only causes discomfort but also interferes with the use of the weapon.
  • Figure 6 shows use of the present invention. User's cheek 82 is now placed against cheek plate 10, eliminating discomfort and minimizing disruption caused by placement at the juncture as in the prior art.
  • the invention is readily practiced in the field of weapons technology, as it can replace the stock of any firearm when used with the associated mounting module described in related applications. Once installed, the invention provides a stock module for a new stock system. In manufacture, the invention is readily molded from any polymer, fiberglass, metal, plastic or any other suitable material.

Abstract

The invention is a stock module 12 for a modular stock system for a firearm. The stock module is adapted to receive a mounting module, usually a specially designed buffer tube, in a manner to allow a consistent cheek weld to the weapon, regardless of module type chosen or length adjustment. In its preferred embodiment, the adaptation is accomplished through a receiving cradle 14, which receives the mounting module, which in turn provides the surface for the cheek weld. Stock portions 16 are varied for the intended use of the stock module. The stock portion 16 may incorporate replaceable and interchangeable portions and additional rails 28, thereby introducing a further element of modularity. The stock module 12 also houses a latching mechanism in hole 26 for adjustable stock embodiments of the module.

Description

TITLE STOCK MODULE FOR MODULAR STOCK SYSTEM CROSS-REFERENCES TO RELATED APPLICATIONS AND PATENTS This application is a Continuation-in-Part application of application number 10/180,429, filed on June 25, 2002 and includes the specification and disclosure of the aforementioned application by reference.
TECHNICAL FIELD The present invention relates to the filed of gunstocks and more particularly relates to stock modules for modular-style gunstocks, enabling a user to interchange different stock modules for different purposes.
BACKGROUND ART Adjustable gunstocks are known in the prior art. For example, U.S. Pat. No. 4,735,007 to Gal (1988); U.S. Pat. No. 4,327,626 to McQueen (1982); U.S. Pat No. 3,442,042 to Gilbert (1967); U.S. Pat. No. 3,348,328 to Roy (1966); U.S. Pat. No. 3,267,601 to Roy (1964); 3,137,958 to Lewis, et al. (1962); U.S. Pat No. 5,827,992 to Harris, et al. (1998) and U.S. Pat No. 2,900,877 to McClenahan (1956) are all illustrative of the prior art. Fixed stocks are also well known in the prior art, predating adjustable stocks by centuries.
The current standard in automatic and semi-automatic rifles is to have a stock capable of receiving and covering a recoil absorption appendage, or "buffer tube", shown in the '992 and '877 patents. The most popular of the available adjustable stocks follow in form to the '328 patent, which is to say they use a spring loaded latch to bias a pin inside a provided adjustment hole. When a user wishes to adjust the stock, a simple compression of the spring/latch assembly is all that is required to release the pin and, therefore, adjust the stock. The '626 patent operates with a tooth-and-groove assembly which, otherwise, follows the same principles. In both cases, compression of the spring is necessary for adjustment in both directions along any length beyond the proximate hole/groove. All of the adjustable stocks may have their butt portion removed, though they are not designed to have such a feature repeatedly used, much less have additional stock modules to exchange. In those cases where the stock moves longitudinally along the weapon, with no other motion relative to the weapon, the user must make some sacrifice as to one, if not both, of two features. The user either loses constant and uniform cheek weld to the weapon or stock stability. The lack of uniform cheek weld can interfere with comfortable and precise use of the weapon. Stock stability can also interfere with precise weapon use. In all of these prior art stocks, the entire stock must be removed if the user wishes to change stock types. While the aforementioned inventions accomplish their individual objectives, they do not describe a truly modular stock, namely a stock where the butt portion is designed to be changed at the whim or need of the user. Likewise, they do not describe a stock that utilizes a cam/tension lock that enables the user to have not only a controlled extension, but also an unrestricted and silent compression and extension of the stock. None of the disclosed stocks have an adjustable preset lock to use in conjunction with an unrestricted adjustment. Finally, none of the disclosed stocks present a surface for a constant cheek weld while simultaneously having a sturdy, longitudinal adjustment capable stock, much less a uniform cheek weld with different stock types. In this respect, the gunstock according to the present invention departs substantially from the usual designs in the prior art. In doing so, this invention provides a modular gunstock allowing for a uniform and identical cheek weld for different stock modules, even while simultaneously adjusting the stock length of an adjustable stock module.
DISCLOSURE OF THE INVENTION In view of the foregoing disadvantages inherent in the known types of firearm stocks, this invention provides an improved modular stock system. As such, the present invention's general purpose is to provide a new and improved stock system that will have interchangeable stock modules.
To attain a truly modular system, the stock module is used in conjunction with an attachment module that is installed on a firearm. In the preferred embodiment, the attachment module is a replacement buffer tube, though for those weapons not requiring a buffer chamber a similarly shaped module may be used without a buffer tube feature. The stock module is then slid onto the attachment module and secured. In the preferred embodiment, the stock module cradles the attachment module, leaving one side of the attachment module exposed. In doing so, the upper surface of the attachment module is continually exposed regardless of the choice of stock module. This feature allows for a consistent cheek weld regardless of the choice of stock module and regardless of the length to which an adjustable stock module is set.
The more important features of the invention have thus been outlined in order that the more detailed description that follows may be better understood and in order that the present contribution to the art may better be appreciated. Additional features of the invention will be described hereinafter and will form the subject matter of the claims that follow. Many objects of this invention will appear from the following description and appended claims, reference being made to the accompanying drawings forming a part of this specification wherein like reference characters designate corresponding parts in the several views.
Before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also it is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting. As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side elevation of a rifle with the attachment module as required by the present invention.
Figure la is the rifle of FIG. 1 with an adjustable stock module. Figure lb is the rifle of FIG. 1 with a fixed stock module.
Figure lc is the rifle of FIG. 1 with a "shorty" fixed stock module Figure 2 is a three staged side elevation showing the use of the adjustable stock embodiment.
Figure 3 is a side elevation of an adjustable stock module. Figure 4 is cross-section view of the module of FIG. 6, taken along line 7.
Figure 5 is a side elevation depicting the use of the current standard adjustable stock. Figure 6 is a side elevation depicting the use of the present invention with an adjustable stock module.
Figures 7a through 7e depict side elevations of suggested stock options. Figures 8a through 8c are side elevations of a specialized stock option that has further modularity. BEST MODE FOR CARRYING OUT THE INVENTION With reference now to the drawings, the preferred embodiment of the stock module is herein described. With particular reference to FIG. 1, an attachment module 2 is joined to a rifle 1 at the receiver. In the preferred embodiment, the attachment module 2 has a flat uniform upper surface, or cheek plate 10, and an adjustment track 8 for use with adjustable for length stock modules. Different stock modules 12 are depicted in FIGS, la - lc. All differences between the actual modules are specifically related to the type of stock desired by the user and can be of any design currently known in the prior art or later developed. What is being claimed is the structuring that enables these types of stocks to be used as modules for a modular stock system and not the individual types of stocks apart from the required structuring.
Figure 2 depicts the present invention in an adjustable stock embodiment in use. Stock module 12, interfaces with attachment module 2 with cradle 14. Slots 9 are provided on attachment module 2 for the interface. Cradle 14 is forward of stock portion 16. Latching mechanism 24a, 24b, 24c interfaces with attachment module 2 on it bottom side, at rail track 8 and interface detents 7. Ideally, latching mechanism is a three-staged camming mechanism, such that it interfaces with both the rail track 8 and detents 7 in a first stage 24a, the detents alone in a second stage 24b, thereby allowing unilateral motion of the stock module 12, and neither rail track 8 nor detents 7 in a third stage 24c, allowing free motion.
Referring to FIG. 3, a specific stock module is depicted for illustration of all types of modules. The depicted module is for an adjustable for length stock, though the structure involved as the claimed invention would be common to all such modules irrespective of actual stock type. Other designs of stock modules may be seen in FIGS 7a- 7e and FIGS, l -lc. Another modularity option is an expandable stock, depicted in FIG. 8. The back plate of the stock can be removable, allowing for accessories, such as batteries or electronic equipment, to be installed within the stock itself.
Stock module 12 has a cradle interface 14 disposed towards the fore end of the module. The module floor 20 and cradle walls 22 define cradle interface 14. At the top of each cradle wall 22 is an attachment rib 18, designed to interface with attachment slots 9 located on attachment module 2, just beneath cheek plate 10. At the forward end of cradle 14 is a space 26 for latching mechanism 24 to be inserted within stock module 12. For further modularity, the underside of any type of stock module 12 may be configured with an attachment rail 28 so that other accessories may be mounted upon the stock module 12. A securement means is also provided with each stock module. The type of means may also be dependent on the type of module. Adjustable modules, such as the one depicted in FIGS. 2a - 2c, will require a readily releasable latch 24 that is easily accessible. The FIGS. 2a - 2c depict three stages in which the preferred adjustable stock latch is actuated. A fixed stock, such as the ones depicted in FIGS, lb and lc, are easily secured with a pin interface 11.
Figure 5 shows the prior art adjustable stock configuration. Notice that user 80 places cheek 82 against the weapon 84. Cheek 82 is positioned against the juncture of the fore 86 and hind 88 portions of the stock. This not only causes discomfort but also interferes with the use of the weapon. Figure 6 shows use of the present invention. User's cheek 82 is now placed against cheek plate 10, eliminating discomfort and minimizing disruption caused by placement at the juncture as in the prior art.
Although the present invention has been described with reference to preferred embodiments, numerous modifications and variations can be made and still the result will come within the scope of the invention. No limitation with respect to the specific embodiments disclosed herein is intended or should be inferred.
INDUSTRIAL APPLICATION The invention is readily practiced in the field of weapons technology, as it can replace the stock of any firearm when used with the associated mounting module described in related applications. Once installed, the invention provides a stock module for a new stock system. In manufacture, the invention is readily molded from any polymer, fiberglass, metal, plastic or any other suitable material.

Claims

I CLAIM: 1. A stock module for a modular stock system for a firearm, the stock module comprising: a. a butt stock body, defining, a back end and a fore end opposite; b. an interface disposed on the fore end of the butt stock portion, the interface designed to receive an attachment base installed on a firearm; and c. a securement means; wherein, the stock module is positioned upon the attachment module and secured via the securement means to thereby provide an entire butt stock for the firearm.
2. The stock module of claim 1, the interface further comprising: a. a receiving cradle, defined by two walls joined at one floor, each wall having a top edge; and b. an interface rib located on each of the wall edges;
Wherein, the stock module is joined to the attachment module by sliding the ribs through attachment tracks provided in the attachment module, thereby exposing one side of the attachment module and aiding in the securement of the stock module to the attachment module.
3. The stock module of claim 2, wherein the stock module is of a fixed, non-adjustable stock.
4. The stock module of claim 2, wherein the stock module is of a stock adjustable for length and further comprises a latching means to interface the attachment module at various points along the length of the attachment module.
5. The stock module of claim 4, the latching means interfacing the attachment base with a camming latch applying directed force to at least one detent positioned on the attacliment base.
6. The stock module of claim 2, wherein the stock module is expandable, thereby allowing the incorporation of additional items within the body of the stock module.
7. The stock module of claim 2, wherein the stock module has replaceable portions, thereby incorporating an aspect of modularity within the stock body itself.
8. The stock module of claim 2, wherein the securement means is at least one pin extending from the stock module and inserted into the attachment module.
9. The stock module of claim 2, wherein the securement means is at least one pin inserted through the stock module and into the attachment module.
10. The stock module of claim 1, wherein the stock module is of a fixed, non-adjustable stock.
11. The stock module of claim 1 , wherein the stock module is of a stock adjustable for length and further comprises a latching means to interface the attachment base at various points along the length of the attachment base.
12. The stock module of claim 11, the latching means interfacing the attachment base with a carrrmhig latch applying directed force to at least one detent positioned on the attachment base.
13. The stock module of claim 1, wherein the stock module is expandable, thereby allowing the incorporation of additional items within the body of the stock module.
14. The stock module of claim 1, wherein the stock module has replaceable portions, thereby incorporating an aspect of modularity within the stock body itself.
15. The stock module of claim 1, wherein the securement means is at least one pin extending from the stock module and inserted into the attachment module.
16. The stock module of claim 1, wherein the securement means is at least one pin inserted through the stock module and into the attachment module.
PCT/US2003/019952 2002-06-25 2003-06-25 Stock module for modular stock system WO2004001322A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/180,429 US6651371B2 (en) 2001-06-25 2002-06-25 Modular gunstock
US10/180,429 2002-06-25

Publications (2)

Publication Number Publication Date
WO2004001322A2 true WO2004001322A2 (en) 2003-12-31
WO2004001322A3 WO2004001322A3 (en) 2005-06-23

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Application Number Title Priority Date Filing Date
PCT/US2003/020442 WO2004001320A2 (en) 2002-06-25 2003-06-23 Buffer tube for modular gunstock
PCT/US2003/019952 WO2004001322A2 (en) 2002-06-25 2003-06-25 Stock module for modular stock system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/US2003/020442 WO2004001320A2 (en) 2002-06-25 2003-06-23 Buffer tube for modular gunstock

Country Status (3)

Country Link
US (5) US6651371B2 (en)
CA (1) CA2490536C (en)
WO (2) WO2004001320A2 (en)

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US20040055200A1 (en) 2004-03-25
US20060096146A1 (en) 2006-05-11
US20040255505A1 (en) 2004-12-23
US7152355B2 (en) 2006-12-26
US20040016167A1 (en) 2004-01-29
CA2490536A1 (en) 2003-12-31
CA2490536C (en) 2009-11-17
US7966760B2 (en) 2011-06-28
WO2004001320A2 (en) 2003-12-31
US6874267B2 (en) 2005-04-05
US20030101631A1 (en) 2003-06-05

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