Pressure relief mechanism for gas operated firearm

Details Pressure relief mechanism for gas operated firearm Pressure relief mechanism for gas operated firearm

1992-03-13

1993-06-08

Bentley, Stephen C.

Ordnance

Automatic

Gas piston type

F41A 526

Patent

active

052181634

ABSTRACT:
A gas operated auto loading shotgun having an axially elongate magazine tube and a gas operated piston/cylinder coaxially surrounding the magazine tube includes a gas pressure relief mechanism at the forward end of the gas cylinder for venting gases of combustion in a forward direction toward the muzzle end of the gun when gas pressure within the gas cylinder exceeds a predetermined magnitude. The pressure relief mechanism includes two angularly spaced apart vent ports communicating with the interior of the gas cylinder and terminating at valve seats at the forward end of the gas cylinder. Spherical valve elements seated on the valve seats are biased toward the valve seats by an annular flat spring member secured in fixed on the gas cylinder by a single fastener and surrounding an associated portion of the magazine tube.

REFERENCES:
patent: 3968727 (1976-07-01), Hyytinen
patent: 4872392 (1989-10-01), Powers et al.
patent: 4901623 (1990-02-01), Lee

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