Rotating gun stock |
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申请号 | US15248021 | 申请日 | 2016-08-26 | 公开(公告)号 | US09562740B1 | 公开(公告)日 | 2017-02-07 |
申请人 | Eshai Korliker; Tal Amlani; Ronnie Gilboa; | 发明人 | Eshai Korliker; Tal Amlani; Ronnie Gilboa; | ||||
摘要 | A rotating gun stock for a firearm having a gun stock fore-end, the rotating gun stock comprising: a rotary positioning disc fixed within the fore-end, the fore-end having a distal end, a proximal end, and a longitudinal axis, the rotary disc fixed within the fore-end substantially at the distal end; the rotary disc further having a first and a second face and a center coaxial with the longitudinal axis, the first face directed towards the proximal end and the second face having a plurality of concentric accepting slots and a radial slot formed therein, the radial slot formed to communicate perpendicularly with the plurality of accepting slots; a butt positioned substantially perpendicularly to the fore-end at the distal end, the butt rotatably attached to the center of the rotary positioning disc, the butt constrained to rotate only about the longitudinal axis; a selector inserted within a selector slot in the butt, the selector protruding into the radial slot and thereby successively into the plurality of accepting slots; wherein rotation of the butt is configured to be selected by the selector to enable a plurality of butt rotational positions about the longitudinal axis, including a lock position of zero degrees. | ||||||
权利要求 | The invention claimed is: |
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说明书全文 | The present application claims priority from U.S. Provisional Application No. 62/250,198, filed 3 Nov. 2015, whose disclosure is incorporated herein by reference. The current invention relates to firearms in general, and specifically to a rotating gun stock suitable for an array of firearms. In the specification and claim which follow hereinbelow, the term “stock” as used in “gunstock” and/or “gun stock” is intended to have equivalent meaning to “butt”, as “gun butt” or “butt stock”. Additionally, as is clarified hereinbelow, embodiments of the current invention are not limited to a gun stock suitable for a rifle (i.e. assault or hunting rifle, inter alia) but to other firearm configurations, such as a hand gun, inter alia. Gun and rifle stocks are manufactured to fit the average right-handed shooter—whereas specialized stocks can be manufactured to fit the exact requirements/anatomy of the shooter. There are a number of variables such as: head position; eye-sighting; recoil pad; inter alia, that are taken into consideration to make a suitable fit of the gun stock, and which can change the dynamics of the firearm. Prior art which addresses his issue includes, inter alia: U.S. Pat. No. 8,720,099, whose disclosure is incorporated herein by reference, in which Sisk describes a multi-axis adjustable buttstock that incorporates a buttstock, having, a grip neck, and a butt along with an interfaced set of two serrated grip retainers attached onto the buttstock grip neck, for buttstock tilt adjustment. A plurality of selectable flat and tapered grip spacers engage the grip serrated retainers for trigger grip length, cast and drop adjustment of the buttstock. A flanged stock bolt is disposed through a portion of the buttstock retaining the spacers and grip retainers while being embraced tightly by a first lock ring. A threaded rod is inserted into the buttstock a desired distance for length of pull adjustment and a second threaded lock ring is positioned on the threaded rod for securement. A recoil pad adapter plate, having a plurality of concentric holes, is attached to the threaded rod, for recoil pad slant adjustment, and a recoil pad is attached to the adapter plate aligned with selected recoil pad holes for recoil pad height and angle adjustments. Fitzpatrick et al., in U.S. Pat. No. 7,762,018, whose disclosure is incorporated herein by reference, describe a modular gunstock utilizing a two-piece mounting structure and a stock module. The structure comprises a weapon attachment, in the case of an AR15/M16 rifle a receiver extension tube, and a sleeve slidable over the attachment and containing mounting structure for the stock module. The stock module is adjustable for length and features a length pre-set system, a latch with independent dual-pawls and an integrated impact buffer, modular tailpiece, and storage. The sleeve also features a position selectable fixed cheek plate. Prior art rotating gun stock solutions however have shortcomings including, but not limited to: incompatibility with protective vests worn when firing; difficulty in switching stock positions easily; difficulty in assembly and disassembly of the gun stock; gun stock suited only to right-handed or only left-handed firer (and not both); incompatibility across an array of firearms, including handguns; and overall difficulty and/or limitations to adjust/operate. There is therefore a need to provide an adjustable gun stock which can be readily adapted to a wide variety of firearms and which may be adjustable in the field using adjustments on the gun stock itself, without specialized tools—among other improvements. According to the teachings of the current invention, there is provided a rotating gun stock for a firearm having a gun stock fore-end, the rotating gun stock comprising: a rotary positioning disc fixed within the fore-end, the fore-end having a distal end, a proximal end, and a longitudinal axis, the rotary disc fixed within the fore-end substantially at the distal end; the rotary disc further having a first and a second face and a center coaxial with the longitudinal axis, the first face directed towards the proximal end and the second face having a plurality of concentric accepting slots and a radial slot formed therein, the radial slot formed to communicate perpendicularly with the plurality of accepting slots; a butt positioned substantially perpendicularly to the fore-end at the distal end, the butt rotatably attached to the center of the rotary positioning disc, the butt constrained to rotate only about the longitudinal axis; a selector inserted within a selector slot in the butt, the selector protruding into the radial slot and thereby successively into the plurality of accepting slots; wherein rotation of the butt is configured to be selected by the selector to enable a plurality of butt rotational positions about the longitudinal axis, including a lock position of zero degrees. Preferably the selector includes a supporting base retained within the selector slot in the butt, and an extended selector piece, the extended selector piece protruding into the radial slot and thereby into at least one of the plurality of accepting slots. Most preferably the selector is configured to translate towards or away the center but not to translate in the direction parallel to the longitudinal axis. Typically, the plurality of accepting slots are formed to correspond to respective rotational positions about the longitudinal axis. Most typically, the respective rotational positions include at least one chosen from the list including: zero degrees; 90 degrees; −90 degrees; and 180 degrees. Preferably, each of the plurality of accepting slots has a spring positioned therein, the spring configured to bias the butt back to the zero degree position when the butt is released. Most preferably, the firearm includes at least one chosen from the list including: an AK47; an AR15; an M16; and a hand gun. Typically, the rotating gun stock is configured to be retrofitted to the firearm. According to the teachings of the current invention, there is further provided a method of operating a rotating gun stock for a firearm having a gun stock fore-end, and comprising the steps of: taking a rotary positioning disc fixed within the fore-end, the fore-end having a distal end, a proximal end, and a longitudinal axis, the rotary disc fixed within the fore-end substantially at the distal end; forming the rotary disc, further having a first and a second face and a center coaxial with the longitudinal axis, the second face having a plurality of concentric accepting slots and a radial slot formed therein, directing the first face towards the proximal end, and forming the radial slot to communicate perpendicularly with the plurality of accepting slots; positioning a butt substantially perpendicularly to the fore-end at the distal end, rotatably attaching the butt to the center of the rotary positioning disc with the butt only able to rotate about the longitudinal axis; inserting a selector within a selector slot in the butt, the selector protruding into the radial slot and thereby successively into the plurality of accepting slots; whereby rotation of the butt is selected by the selector to enable a plurality of butt rotational positions about the longitudinal axis, including a lock position of zero degrees. Preferably, the selector includes a supporting base retained within the selector slot in the butt, and an extended selector piece, the extended selector piece protruding into the radial slot and thereby into the plurality of accepting slots. Most preferably, the selector translates towards or away the center but does not translate in the direction parallel to the longitudinal axis. Typically, the plurality of accepting slots correspond to respective rotational positions about the longitudinal axis. Most typically, the respective rotational positions include at least one chosen from the list including: zero degrees; 90 degrees; −90 degrees; and 180 degrees. Preferably, a spring is positioned within each of the plurality of accepting slots, the spring serving to bias the butt back to the zero degree position when the butt is released. Most preferably, the firearm includes at least one chosen from the list including: an AK47; an AR15; an M16; and a hand gun. Typically, the rotating gun stock is retrofitted to the firearm. The invention is herein described, by way of example only, with reference to the accompanying drawings, wherein: Embodiments of the present invention relate to firearms in general, and specifically to a rotating gun stock suitable for an array of firearms. Reference is currently made to Prior art firearm 5 may include exemplary weapons such as, but not limited to: AK47; AR15; and M16; as well as hand guns. Firearm butt stock 6 represents a number of optional and variably-shaped butt stocks that generally may be interchanged by attaching other parts (not shown in the current figure) and the butt stock to stock attachment point 7 and/or to buffer tube 8, as known in the art and as described further hereinbelow. Reference is currently made to Exemplary gun stock fore-end 14 is typically attached to buffer tube 8 (ref Butt 12 is shown in
The constrained longitudinal and rotary movement of butt 12 with regard to stock for-end 14 is described further hereinbelow. Fore-end 14 is fabricated to snuggly fit onto buffer tube 8, which is shown in Reference is currently made to In Reference is currently made to Rotary positioning disc 22 has two faces: a proximal face 22a; and a distal face 22b. Rotary positioning disc 22 further has a structure which includes a disc attachment pin hole 30, a gun stock fore-end insertion neck 34 and a butt insertion end 32. The fore-end insertion neck 34 is substantially positioned within gun stock fore-end 14, towards proximal end 14a—as described herein above. Butt insertion end 32 has a slightly larger diameter than that of the gun stock for-end insertion neck and is substantially mated within circularly-shaped indentation 28—as described hereinabove. In one embodiment of the current invention, fore-end insertion neck 34 may have a key-hole shape (not shown in the figures) similar to the shape of gun stock fore-end 14—however the circular shape of butt insertion end 32 is maintained in this configuration. Disc attachment pin hole 30 is configured to be aligned substantially concentrically with pin hole 17 (of butt 12) along axis 27—refer to As shown in Radial slot 40 is formed to receive extended selector piece 54 of selector 15, when the selector is positioned in place, as shown in Selector 15 is formed having a thickness 50, a supporting base 52, and an extended selector piece 54—as shown in With butt 12 positioned onto gun stock fore-end 14, as shown in Slots 42, 44, and 46 in positioning disc respectively are formed to allow rotation of butt 12 in three corresponding rotational directions, measured from the “zero rotation” position namely: to the left approximately 180 degrees; to the left approximately 90 degrees; and to the right approximately 90 degrees. It is seen in Radial slot 40 is formed with springs and/or bearing arrangements to enable a “click-in-place” translational movement, as known in the art, of selector 15 to the four positions noted hereinabove. Selector 15 may be easily and accurately translated from one position to the next typically by a push or pull of a finger or a thumb resting on butt 12 at selector 15. In this way, butt rotation may be rapidly and securely selected to enable each of the rotational positions noted above-including the lock position noted above. Furthermore, and as noted hereinabove, when no opposing rotational force is present, butt 12 assumes a normal “zero position” due to the spring-bias of respective slots. Respective springs of respective slots are chosen to have a force to allow the butt to be maintained in a selected rotational orientation when the butt is held in that position and/or when the butt is pressed against a firer's shoulder (not shown in the figures). Although rotary positioning disc 22 described hereinabove is described and shown with three slots, yielding four selector positions (including the lock position), it may be understood that embodiments of the current invention can include less or more slots in positioning disc 22 and less or more corresponding selector positions. Other advantages/functions of embodiments of the current invention include:
It will be appreciated that the above descriptions are intended only to serve as examples, and that many other embodiments are possible within the scope of the present invention as defined in the appended claims. |