Free piston power unit with relieved face bounce cylinders

Details Free piston power unit with relieved face bounce cylinders Free piston power unit with relieved face bounce cylinders

1987-12-23

1988-10-11

Husar, Stephen F.

Power plants

Internal combustion type free piston device supplies motive...

123 46R, 417380, F02B 7104

Patent

active

047761660

ABSTRACT:
An improved free piston power unit includes a pair of power pistons at opposite ends of a common power cylinder, wherein the power pistons are linked for reciprocation in unison in opposite directions. The power pistons carry a respective pair of compressor pistons disposed within compressor cylinders to generate a supply of compressed air or the like upon power piston reciprocation. The power pistons further cooperate with a respective pair of gas-containing bounce cylinders which provide pneumatic reaction forces to return the power pistons through a compresion stroke at the conclusion of a combustion expansion stroke. The bounce cylinders each have a relieved end face to provide an increased minimum bounce cylinder volume thereby limiting the maximum pressure and temperature to which the bounce cylinders are subjected, without requiring increase in the overall envelope size for the power unit.

REFERENCES:
patent: 1908474 (1933-05-01), Dewees
patent: 2101412 (1937-12-01), Pescara
patent: 3134372 (1964-05-01), Braun
patent: 3500804 (1970-03-01), Braun
patent: 4308720 (1982-01-01), Brandstadter
U.S. Publication Ser. No. 381,656; published 6/15/1943 under Alien Property Custodian Law; Franz Neugebauer.

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