US3618249A - Pivotally mounted stock for firearms - Google Patents

Abstract

A LIGHTWELDING LOW RECOIL RIFLE HAVING A STOCK MEMBER PIVOTALLY MOUNTED ON EAR PORTIONS OF A RECESSED PISTOL GRIP MEMBER CONTAINING MEANS FOR LOCKING THE STOCK AS A LONGITUDINAL REARWARD EXTENSION OF A BARREL SUPPORTING FOREPART AND ANOTHER FOLDED POSITION 180* THEREFROM WITH THE STOCK EXTENDING FORWARDLY ALONG HE BARREL IN WHICH A RECESSED HANDLE PORTION OF THE STOCK IS IN A READILY ACCESSIBLE LOCATION SUBSTANTIALLY OVERLYING THE FIREARM CENTER OF GRAVITY.

Description

Nov. 9, 1971 GRANDQY 3,618,249

PIVOTALLY MOUNTED STOCK FOR FIREARMS Filed Aug. 1, 1969 INVENTOR, ANDREW d. GRANDY M 4 $9M ATTORNEYS.

United States Patent 3,618,249 PIVOTALLY MOUNTED STOCK FOR FIREARMS Andrew J. Grandy, North Hills, Pa., assignor to the United States of America as represented by the Secretary of the Army Filed Aug. 1, 1969, Ser. No. 846,769 Int. Cl. F41c 23/00 US. Cl. 42-73 2 Claims ABSTRACT OF THE DISCLOSURE A lightweight low recoil rifle having a stock member pivotally mounted on ear portions of a recessed pistol grip member containing means for locking the stock as a longitudinal rearward extension of a barrel supporting forepart and another folded position 180 therefrom with the stock extending forwardly along the barrel in which a recessed handle portion of the stock is in a readily accessible location substantially overlying the firearm center of gravity.

The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to me of any royalty thereon.

This invention relates to firearms and more particularly to a low recoil rifle.

One of the objects of the invention is to provide a lightweight low recoil rifle system having improved controllability of automatic firing.

Another object of the invention is to provide such a rifle that better facilitates manual transportation thereof when not in operative use.

These and other objects, features and advantages will become more apparent from the following description and accompanying drawings in which:

FIG. 1 is an elevational view of a firearm construction in operational condition and embodying the principles of the invention.

FIG. 2 is a view similar to FIG. 1 with the rifle combination stock and handle in the folded or manual transporting condition.

FIG. 3 is an exploded view of certain parts of the FIG. 1 firearm.

FIG. 4 is an enlarged sectional view taken along line 44 of FIG. 3.

FIG. 5 is an enlarged side elevational view of the FIG. 3 locking flange turned 90 clockwise.

The automatic rifle, shown generally at (FIG. 1), includes a barrel 11 (FIGS. 1, 2) and a longitudinally extending wood forepart 12 adjacently secured to and supporting the barrel. To a rearward portion of the wood forepart is suitably secured a pistol grip member 13 having an upwardly opening recess 14 (FIG. 3) that extends transversely of the barrel 11 and defines a pair of upstanding, laterally spaced ear portions 15 each having a circular aperture 16 transversely aligned with each other.

Seated in recess 14 is a compression spring 17 that normally urges an overlying lock plunger 18 upwardly. The depressible plunger 18 has a cylindrical lateral surface provided with diametrically opposed key-shaped slots that have correspondingly aligned circular and non-circular portions 19 and 20. A stock lug, for pivotally mounting a stock member 24 on grip 13, has a pair of spaced non-circular end portions 21 and 22 (FIGS. 3, 4) interconnected by an integral non-circular central portion 23 which is rotatably mounted in the grip apertured ears 15 and adapted to be slidingly received by the plunger 3,618,249 Patented Nov. 9, 1971 non-circular slot portions 20 when plunger 18 is moved upwardly by spring 17. The stock lug end portions 21 and 22 are respectively larger and smaller than both the grip ear apertures 16 and the plunger slot circular portions 19, and the square-shaped lug ends 21, 22 are matingly received in the corresponding non-ciricular or square-shaped apertures 25, 26 of the bifurcated ear members 27, 28 provided on stock member 24. Upon proper assembly with the lug central portion 23 oriented for sliding movement into upwardly biased plunger slot portions 20 where the stock 24 is lockable in its FIG. 1 operative position upon upward movement of lock plunger 18, appropriate depression of plunger 18 will enable a reciprocating pivotal motion of the stock 24 and stock lug relative to the barrel 11 or grip recess 14 between lockable unfolded and folded stock positions.

The stock 24 has a lower recessed handle portion 30 which is so shaped that the readily accessible handle in the folded stock locked position (FIG. 2) substantially overlies the firearm center of gravity and facilitates manual transportation of the lightweight rifle when not in operative use.

A locking or retaining flange 29 (FIGS. 3, 5), having a threaded cylindrical protuberance 31 for securement in a matingly tapped opening 22A (FIG. 4) in stock lug end 22, secures the assembled stock mounting parts 1n position. Preferably, a pair of small detents 32, each of greater length than the width of retaining flange 29, are threadedly mounted in suitably tapped bores of flange 29 and the detent outer ends have appropriate minute openings (not shown) to accommodate an Allen wrench to facilitate adjustment of the detents 32 such that portions of each detent protrude slightly beyond both the inner and outer faces of retaining flange 29. The inner detent protuberances serve to frictionally engage the outer surface of stock ear 28 in an assembled arrangement, while the outer detent protuberances facilitate manual securement and removal of flange 29.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim:

1. In a rifle having a barrel and a longitudinally extending wood forepart adjacently secured to said barrel,

a pistol grip member secured to a rearward portion of said wood forepart and having an upwardly opening recess extending transversely of said barrel and defining a pair of upstanding, laterally spaced ear portions, a circular aperture in each of said ear portions transversely aligned with each other,

a compression spring seated in said recess,

a depressible lock plunger overlying said spring and having a cylindrical lateral surface provided with diametrically opposed key shaped slots, each of said slots having correspondingly aligned circular and non-circular portions,

a stock lug having a pair of spaced non-circular end portions interconnected by an integral non-circular central portion that is rotatably mounted in said apertured ear portions and adapted to :be slidingly received by said plunger non-circular slot portions when said plunger is moved upwardly in said recess by said spring, one of said lug end portions being larger than said ear apertures,

a stock member having bifurcated ear members and a recessed handle portion, said ear members having corresponding non-circular apertures matingly receiving the respective lug end portions for reciprocating 180 pivotal movement therewith relative to said barrel, and

3 4 a locking flange threadedly secured to the other of said 2,688,203 9/1954 Gaidos 42'71 stock lug end portions. 3,256,632 6/1966 Beretta 42-72 2. The structure of claim 1 in which adjustable deten 3,369,316 2/1968 Miller -2 42-72 means extend transversely through said locking flange.

References Cited UNITED STATES PATENTS 2,405,758 8/1946 Sampson 4272 US. Cl. X.R. 2,433,151 12/1947 Parsons 4272 42-72 5 BENJAMIN A. BORCHELT, Primary Examiner C. T. JORDAN, Assistant Examiner

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