Gas piston in a firearm

Details Gas piston in a firearm Gas piston in a firearm

1974-03-11

1976-03-23

Bentley, Stephen C.

Ordnance

Automatic

Gas piston type

F41D 510

Patent

active

039452964

ABSTRACT:
A piston such as a gas piston of a firearm. The piston includes a substantially rigid cylindrical body having an end region which fluid-tightly and slidably engages one surface while extending from the latter surface toward but terminating short of a second surface which is fluid-tightly and slidably engaged by an elastic sealing ring of the piston. The end region of the piston member is formed with a groove receiving a flange of the sealing ring and the latter has a wall extending from the flange to define with a lip situated on one side of the groove a gap of a predetermined radial width. Situated in this groove between the lip and the flange of the sealing ring is a snap ring which has between its peripheral edges a radial width greater than the width of the gap for securely maintaining the sealing ring in its operative relationship with respect to the piston member.

REFERENCES:
patent: 3709092 (1973-01-01), Tazome
patent: 3810412 (1974-05-01), Zamacola

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