Ordnance – Automatic – Gas piston type
Patent
1977-02-22
1978-11-14
Bentley, Stephen C.
Ordnance
Automatic
Gas piston type
89191A, F41D 508
Patent
active
041250540
ABSTRACT:
An improvement in gas operated firearms having means for regulating the flow of gas from the barrel of the firearm to the piston which operates the action of the firearm. The improvement is a device which eliminates the necessity of having to change the barrels to accommodate different types of ammunition and loads. The improvement embodies a combined gas regulator and piston receiver associated with the reciprocating piston that actuates the action of the firearm. The combined gas regulator and piston receiver is reversible and in either of its positions fits in sealing relationship against the member which depends from the barrel of the gun and contains the gas orifices that deliver the gas from the barrel, to the regulator. The regulator-receiver has a bore that fits on the forearm shaft. Equally angularly spaced axial passageways are provided of partial circular configuration at the internal diameter of the regulator. An axial bore or passageway is also provided through the regulator. In one position of the regulator the angularly spaced passageways are closed by a shoulder on the forearm shaft. At one end of the regulator bypass holes or cutouts which are counter-bores are provided at the positions of the axial passageways to provide bypass passageways around the shoulder on the shaft. In this way the regulator can accommodate to different ammunition.
REFERENCES:
patent: 1382058 (1921-06-01), Bourdelles
patent: 2393627 (1946-01-01), Garand
patent: 4014247 (1977-03-01), Tollinger
Bentley Stephen C.
Herzig Albert M.
Walsh Edward C.
Weatherby, Inc.
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