Recoil Eliminator (Patent No: 652393)

Inventor: Davidson, Douglas

Location: Calgary

Comments: see Calgary Herald, September 10, 1962, The Albertan, February 21, 1963; sketch and photo of inventor; recoil mechanism to make rifle more compact; became interested in recoil problems during the war while working aircraft inspector on pre-ramp inspection; tested by national defence

Description:
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

(1) A recoil eliminator assembly adapted to be fitted on to the muzzle end of rifles, shotguns, pistols and the like, comprising in combination a pressure tube fitted to said muzzle as an extension thereof, gas escape means formed in the wall of said pressure tube, a pressure chamber surrounding said pressure tube in spaced annular relationship, gas escape apertures formed in the wall of said pressure chamber, and means at each end of said tube and said chamber for securing said chamber to said tube in spaced annular relationship, said last mentioned means comprising a shoulder formed on said tube at the muzzle end thereof, an annular groove formed on the inner face of said shoulder adapted to receive one end of said chamber, a retainer nut screw threadably attached to the other end of said tube, the inner face of said nut also having an annular groove adapted to receive the other end of said chamber.

(2) A recoil eliminator assembly adapted to be fitted on to the muzzle end of rifles, shotguns, pistols and the like, comprising in combination a pressure tube fitted to said muzzle as an extension thereof, gas escape means formed in the wall of said pressure tube, a pressure chamber surrounding said pressure tube in spaced annular relationship, gas escape apertures formed in the wall of said pressure chamber, and means at each end of said tube and said chamber for securing said chamber to said tube in spaced annular relationship, said last mentioned means comprising a shoulder formed on the muzzle end of said tube, said shoulder being externally screw threaded to receive the internally screw threaded end of said chamber, and a retainer nut internally and externally screw threaded and adapted to engage by the internal threads thereof, the external screw threaded other end of said tube, and by the external screw threading thereof, the internal screw threaded other end of said chamber.

(3) The device according to Claim 1 which includes gas baffle means in said pressure tube, said gas baffle means comprising a centrally apertured cylinder screw threaded receivable within said pressure tube, the end of said cylinder facing the direction of travel of said gases being chamfered outwardly to form an annular V-shaped gas trap with the wall of said tube.

(4) The device according to Claim 1 which includes a flash tube secured to the end of said pressure tube remote from said muzzle.


(5) The device according to Claim 2 which includes a flash tube secured to the end of said pressure tube remote from said muzzle.

(6) The device according to Claim 3 which includes a flash tube secured to the end of said pressure tube remote from said muzzle.

(7) The device according to Claim 2 which includes a flash tube secured to the end of said pressure tube remote from said muzzle, gas baffle means in said pressure tube, said gas baffle means being formed integrally with the flash tube, said flash tube including an internally screw threaded cylindrical retainer on one end thereof) an integral annular shoulder between said retainer and said flash tube) the end, said pressure tube opposite to said muzzle abutting against said shoulder, said shoulder extending inwardly beyond the inner diameter of said pressure tube and acting as said baffle.


(8) A recoil reducing attachment for gun barrels, said attachment comprising an open-ended tubular member adapted to constitute a longitudinal continuation of the muzzle of a gun barrel, said member having a muzzle end and an outer end, a diametrically enlarged tubular adapter provided integrally at the muzzle end of said tubular member and adapted to receive therein the muzzle of a gun barrel, said adapter being provided with an internal annular shoulder for abutment with a barrel muzzle and the inside diameter of said tubular member being flush with the inside diameter of said shoulder and substantially equal to the gun barrel bore, an externally screw-threaded inner flange provided on said adapter, an externally screw-threaded outer flange provided on said tubular member adjacent but spaced inwardly from its outer end whereby the outer end portion of said tubular member projects outwardly beyond said outer flange, and a tubular casing having internally screw-threaded end portions engaging said inner and outer flanges and surrounding said tubular member and said adapter in radially outwardly spaced relation whereby to provide a chamber therebetween, said tubular member being provided with gas outlet openings communicating with an intermediate portion of said chamber, said casing being provided adjacent said inner flange with gas outlet apertures communicating said chamber with the atmosphere, and the portion of said casing forwardly of said gas outlet apertures being imperforate.