Firearms – With adjustable head space – By reaming
Patent
1983-04-12
1985-01-08
Jordan, Charles T.
Firearms
With adjustable head space
By reaming
F41C 2118
Patent
active
044920504
ABSTRACT:
A recoil reducer can be fitted onto most styles of conventional shotguns with very simple modification. An elongated cylinder tube is slipped into the end of the gun's magazine tube, the rear portion of the cylinder tube being a reinforcing sleeve which lines the interior of the magazine tube for a distance to add strength to the magazine tube and stability to the cylinder tube, the forward end of the cylinder tube extending beyond the end of the magazine. A threaded coupling on the exterior of the cylinder tube is tightened onto the threaded end of the magazine tube to secure the cylinder tube in place. Inside the cylinder tube is a slidable, weighted piston assembly, biased by a spring toward the forward end of the cylinder tube, and an expansible chamber which receives pressurized gases from the gun barrel when a round is fired, thereby pushing the piston assembly rearward against the biasing of the spring, causing the gun to recoil in the forward direction and partially offsetting the rearward recoil of the gun from the firing of the round. A barrel ring extending down from the barrel encircles the gun's magazine tube just back from the threaded end, and a bore from the ring to the interior of the gun barrel is aligned with bores through the magazine tube and the sleeve of the recoil cylinder tube, so that the pressurized gases from the firing of the round are conducted into the expansible chamber. The cylinder tube of the recoil device preferably includes a removable threaded cap on its forward end, and a buffer just inside the cap, against which the forward end of the piston assembly normally rests and against which it impacts when the piston assembly is returned forward by the spring.
REFERENCES:
patent: 2679192 (1954-05-01), Seeley et al.
patent: 3018694 (1962-01-01), Browning
patent: 3105411 (1963-10-01), Browning
patent: 3115063 (1963-12-01), Browning
patent: 4088057 (1978-05-01), Nasypany
patent: 4156979 (1979-06-01), Katsenes
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