Firearm

Details Firearm Firearm

1987-12-17

1989-04-04

Kyle, Deborah L.

Ordnance

Automatic

Gas piston type

F41D 504

Patent

active

048174963

ABSTRACT:
A firearm comprises a gas drive for actuating loading and/or firing means in response to the discharge of a round, wherein the gas drive comprises a pneumatic cylinder and a pneumatic piston, the cylinder chamber communicates with the barrel bore through at least one transverse bore in the barrel, and powder gas is adapted to enter said cylinder chamber through said transverse bore and to move said cylinder and piston relative to each other against the force of a return spring. In order to provide a gas drive which is particularly simple and functionally reliable, light in weight and compact, the barrel is provided with a collar or the like, which constitutes a stationary pneumatic piston, and the pneumatic cylinder consists of a sliding sleeve, which surrounds the collar and is longitudinally displaceable between stops.

REFERENCES:
patent: 663955 (1900-12-01), Burgess
patent: 3261264 (1966-07-01), Wilson
patent: 3273460 (1966-09-01), Mason
patent: 3848511 (1974-11-01), Zanoni

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