Free piston machine

Details Free piston machine Free piston machine

1995-04-10

1997-07-08

Johnson, Stephen M.

Ordnance

Pneumatic

89 114, F41A 3304

Patent

active

056463634

ABSTRACT:
A free piston machine comprising a cylinder having a first and second closed ends, a piston slidable in the cylinder between the closed ends, a first conduit communicating between a source of gas under pressure and the first closed end of the cylinder, a second conduit communicating between the first closed end of the cylinder and atmosphere, valve means controlling flow through the second conduit, and a piston-controlled port in the cylinder and communicating between the cylinder and the source of gas under pressure, the arrangement being such that the piston closes the port when disposed at the first closed end of the cylinder.

REFERENCES:
patent: 3214909 (1965-11-01), Gordon
patent: 3215223 (1965-11-01), Kirby et al.
patent: 3238642 (1966-03-01), Ohlund
patent: 3323531 (1967-06-01), Spellman
patent: 4100991 (1978-07-01), Airhart
patent: 4284164 (1981-08-01), Airhart
patent: 4712379 (1987-12-01), Adams et al.
patent: 5180878 (1993-01-01), Denchfield
Seisakusho et al., Abstract Only for Japan 59-221401, Apr. 27, 1985.
European Search Report for EPO Application 95 30 2344.

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