US3650060A

US3650060A - Inertial recoil reducer for magazine firearms

Info

Publication number: US3650060A
Application number: US19227A
Authority: US
Inventors: Donald R Schubert
Original assignee: Individual
Current assignee: Individual
Priority date: 1970-03-13
Filing date: 1970-03-13
Publication date: 1972-03-21
Anticipated expiration: 1989-03-21

Abstract

An inertial recoil reducer for magazine firearms which includes a weighted piston interposed between a cushioned magazine follower and the magazine spring. The weighted piston is normally balanced in the magazine and as recoil starts the gun rearwardly, the inertia of the weighted piston causes it to remain in the same position applying pressure to the magazine spring and through it to the magazine and hence to the gun to reduce the recoil of the gun.

Description

United States Patent Schubert [451 Mar. 21, 1972 54] INERTIAL RECOIL REDUCER FOR 3,405,470 10/1968 Wesemann ..42/74 MAGAZINE FIREARMS 2,350,555 6/1944 Horan ..42/17 [72] Inventor: Donald R. Schubert, 3407 4th St. Road, Primary Examiner Benjamin ABorchelt Greely Colo 80631 Assistant Examiner-C. T. Jordan 22 Filed; Man 13, 1970 Attorney-Berman, Davidson and Herman An inenial recoil reducer for magazine firearms which in- (gl. flglflgolsl cludes a weighted piston interposed between a cushioned 'g i 49 A 74 magazine follower and the magazine spring. The weighted I piston is normally balanced in the magazine and as recoil starts the gun rearwardly, the inertia of the weighted piston [56] References cited causes it to remain in the same position applying pressure to UNITED STATES PATENTS the magazine spring and through it to the magazine and hence to the gun to reduce the recoil of the gun. 1,039,182 9/1912 Parsons ctal ..42/49 3,381,405 5/1968 Edwards 3 Claims, 3 Drawing Figures 20 /9 Zz I f f 4 INERTIAL RECOIL REDUCER FOR MAGAZINE FIREARMS BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to recoil reducing devices of the type which can be attached to a magazine firearm without the use of tools.

SUMMARY OF THE INVENTION The present invention includes a cushion fitted into the magazine follower and a weighted piston which engages at one end against the cushion within the follower and at the other end against the magazine spring so that at the beginning of recoil of the gun, the inertia of the weighted piston causes it to remain in the same general position to thereby apply recoil reducing forces to the magazine spring and magazine and through them to the gun.

The primary object of the invention is to provide a recoil reducing device which can be added to conventional magazine firearms without modifying the firearm or using tools for the attachment.

Other objects and advantages will become apparent in the following specification when considered in light of the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevation of a shot gun incorporating the invention;

FIG. 2 is an enlarged fragmentary transverse cross section taken along the line 22 of FIG. 1 looking in the direction of the arrows; and

FIG. 3 is an exploded perspective view of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings in detail wherein like reference characters indicate like parts throughout the several figures, the reference numeral 10 indicates generally a shotgun incorporating the invention. The shotgun 10 is of conventional construction having a stock 1 1, trigger l2 and barrel 13 all of conventional design and carrying a tubular magazine 14 on the under side thereof. The shotgun shells 15 are shown within the tubular magazine 14 and a cupped shaped magazine follower 16 engages the shells l and is normally engaged by the magazine spring 17 which extends to the outer end of the tubular magazine 14.

In the present invention a cushion 18 formed of a cylindrical body of foam rubber or plastic is inserted in the follower l6 and a heavy metal piston 19 having a reduced diameter portion 20 extending into the cupped shaped follower 16 and engaging against the cushion 18. A reduced diameter forward extension 21 is formed on the opposite end of the piston 19 and an annular groove 22 is formed in the piston 19 between the forward extension 21 and the main body of the piston 19. A ring 23 formed on the rear end of the recoil spring 17 snaps into the annular groove 22 securing the rear of the spring 17 to the piston 19.

Shotgun shells are loaded into the magazine 14 in the same manner as prior to the use of the invention compressing the cushion l8 and the magazine spring 17 with the piston 19 being in balanced condition in the magazine 14 after the loading of the shells 15 is completed. The foam cushion 18 is depressed by the weight of the piston 19 and magazine spring 17 to an amount which varies in relation to spring tension. This compression equalizes spring tension, leaving the piston weight at balance in the magazine tube 14 with equal pressure at both ends. The gun 10 is fired and the recoil velocity moves the gun to the rear. The piston weight by the laws of inertia, tends to stay in the same position as it was before the gun was fired, thus exerting pressure forward on the magazine spring 17. This pressure increases proportionately with the recoil velocity in the opposite direction of recoil. As the recoil velocity decreases after gun IS fired, the piston weight 18 returned quickly by the magazines spring 17 to its original position. In the return of the piston 19, the foam cushion l8 acts as a shock absorber and damping of oscillations is quickly accomplished with minimum shock being produced by piston return.

Normal muzzle jump is reduced by the straight forward movement of the piston weight in relation to the firearm reacting against the centripetal force of upward movement of the firearm.

The forward extension 22 on the piston 19 when attached to the magazine spring 17, reduces wear on the spring 17 by holding the spring 17 in a central position out of contact with the magazine 14. The piston 19 is milled to a loose fit in the magazine 14 and air pressure from piston movement is negligable. This loose fit also allows a recoil reducer to be installed in almost all tubular magazine guns of the same caliber or gauge.

While the recoil reducer has been illustrated mounted in the magazine of a shotgun, it should be understood that with proper sizing, it can be used in any tubular magazine firearm.

Having thus described the preferred embodiment of the invention, it should be understood that numerous structural modifications and adaptations may be resorted to without departing from the spirit of the invention.

What is claimed is:

1. An inertial recoil reducer for firearms including a tubular magazine having a cup shaped magazine follower and a compression coil magazine spring comprising a cushion mounted in said follower, a weighted piston engaging in said follower against said cushion, and means securing said piston to said magazine spring including a reduced diameter forward extension on said piston and an annular groove formed in said extension adjacent the body of said piston with said magazine spring engaging in said annular groove.

2. A device as claimed in claim 1 wherein the cushion in said magazine follower comprises a cylindrical foam body.

3. A device as claimed in claim 1 wherein the diameter of said weighted piston is substantially smaller than the diameter of said tubular magazine to permit the free flow of air past said piston.

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