Valves for cryogenic refrigerators

Refrigeration – Gas compression – heat regeneration and expansion – e.g.,...


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13762537, F25B 900




An improved valve is provided for controlling the flow of working fluid in a cryogenic refrigerator of the type comprising a reciprocating displacer. The valve has a slidable valve member which is arranged to alternately introduce working fluid to or remove working fluid from a cooling chamber in response to reciprocating movement of the displacer. The valve is constructed so as to make certain that sliding movement of the valve member is not restricted by the working fluid.

patent: 2906101 (1959-09-01), McMahon et al.
patent: 2966035 (1960-12-01), Gifford
patent: 3119237 (1964-01-01), Gifford
patent: 3188821 (1965-06-01), Chellis
patent: 3218815 (1965-11-01), Chellis et al.
patent: 3421331 (1969-01-01), Webb
patent: 3600903 (1971-08-01), Chellis
patent: 3609982 (1971-10-01), O'Neil et al.
patent: 3620029 (1971-11-01), Longsworth
patent: 3733837 (1973-05-01), Lobb
patent: 3788088 (1974-01-01), Dehne
patent: 3853146 (1974-12-01), Blair
patent: 4108210 (1978-08-01), Luthe et al.


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