Rifle

Details Rifle Rifle

2007-05-08

2007-05-08

Chambers, Troy (Department: 3641)

Ordnance

Automatic

Buffers and brakes

C042S074000

Reexamination Certificate

active

11027956

ABSTRACT:
A rifle with an upper receiver and a barrel attached to the upper receiver and including a bolt carrier, and operating, buffer, and cooling systems. The operating system includes a cylinder and a piston coupled to receive propelling gases from the barrel. As the piston moves between retracted and extended positions the bolt carrier is moved between closed and open positions. The bolt carrier includes a weight movable within a guide frame between rearward and forward limits. The buffer system includes a compression spring in a tube attached to the upper receiver in abutting engagement with the bolt carrier. A partially fluid filled cylinder is attached to a coil of the spring and includes a piston and shaft. The piston is formed so that fluid in the cylinder restricts movement in one direction and allows free movement in a second direction.

REFERENCES:
patent: 3336838 (1967-08-01), Wilson
patent: 3417660 (1968-12-01), Harbrecht
patent: 3650177 (1972-03-01), Hupp et al.
patent: 3977296 (1976-08-01), Silsby et al.
patent: 4307653 (1981-12-01), Goes et al.
patent: 4335644 (1982-06-01), Goes et al.
patent: 4558628 (1985-12-01), Bosshard
patent: 5513730 (1996-05-01), Petrovich et al.
patent: 6536324 (2003-03-01), Boissiere et al.
patent: 6668478 (2003-12-01), Bergstrom

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