Expansible chamber devices – Piston – Radially adjustable side wall portion
Patent
1978-06-05
1980-10-07
Cohen, Irwin C.
Expansible chamber devices
Piston
Radially adjustable side wall portion
92205, F16J 106, F16J 910
Patent
active
042261694
ABSTRACT:
The operation of a reciprocating expansion engine for cryogenic refrigeration is improved by changing the pistons and rings so that the piston can be operated from outside the engine to vary the groove in which the piston ring is located. This causes the ring, which is of a flexible material, to be squeezed so that its contact with the wall is subject to external control. This control may be made manually or it may be made automatically in response to instruments that sense the amount of blow-by of the cryogenic fluid and adjust for an optimum blow-by.
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Mazur Peter O.
Pallaver Carl B.
Cohen Irwin C.
Denny James E.
Jackson Frank H.
Reynolds Donald P.
The United States of America as represented by the United States
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