In-line annular piston fixed bolt regenerative liquid propellant

Ordnance – Pneumatic

Patent

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Details

89 8, F41F 104

Patent

active

045235082

ABSTRACT:
A regenerative liquid propellant gun structure in which the differential area piston is annular, having a peripheral cylindrical skirt extending away from the combustion chamber to define a propellant reservoir, and has an aperture permitting overrunning of a fixed bolt. The fixed bolt is shaped to define with the edge of the aperture a variable annual orifice for propellant injection as the piston moves. There is a second free piston overrunning the bolt and mating with the inside of the differential area piston to complete and provide for emptying of the reservoir. The structure also contains a spring to allow components to move responsive to increased combustion chamber pressure to provide for an initial movement of differential area piston relative to the bolt to start propellant injection and a fluid pressure means for movement of pistons after firings to facilitate reloading.

REFERENCES:
patent: 3138990 (1964-06-01), Jukes et al.
patent: 4023463 (1977-05-01), Tassie
patent: 4050349 (1977-09-01), Graham
patent: 4099445 (1978-07-01), Singelmann et al.
patent: 4100836 (1978-07-01), Hofmann
patent: 4269107 (1981-05-01), Campbell
patent: 4281582 (1981-08-01), Jagua
patent: 4341147 (1982-07-01), Mayer

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