Cryogenic expansion machine

Details Cryogenic expansion machine Cryogenic expansion machine

1976-11-09

1978-05-09

Schwadron, Martin P.

Refrigeration

Refrigeration producer

Evaporator, e.g., heat exchanger

74568R, 91 37, F25B 1900

Patent

active

040879887

ABSTRACT:
A cryogenic expansion engine includes intake and exhaust poppet valves each controlled by a cam having adjustable dwell, the valve seats for the valves being threaded inserts in the valve block. Each cam includes a cam base and a ring-shaped cam insert disposed at an exterior corner of the cam base, the cam base and cam insert being generally circular but including an enlarged cam dwell, the circumferential configuration of the cam base and cam dwell being identical, the cam insert being rotatable with respect to the cam base. GI

REFERENCES:
patent: 2803226 (1957-08-01), Renoux
patent: 3252291 (1966-05-01), Eder
patent: 3301089 (1967-01-01), Wechsler
patent: 3320755 (1967-05-01), Jepsen
patent: 3418824 (1968-12-01), Beutel
patent: 3459402 (1969-08-01), Weaver
patent: 3550568 (1970-12-01), Peterson
patent: 3839925 (1974-10-01), Ficken
patent: 4004497 (1977-01-01), Scholin

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