Unloader valve for cryogenic refrigerator

Details Unloader valve for cryogenic refrigerator Unloader valve for cryogenic refrigerator

1987-09-14

1990-04-03

Capossela, Ronald C.

Refrigeration

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

621961, F25B 900

Patent

active

049129325

ABSTRACT:
A modified Stirling cycle cryogenic refrigerator having an improved unloader valve mechanism for bypassing the compressor cylinder for a short time during start-up in order to reduce the starting torque on the motor driving the pistons and when the drive motor is turned off in order to prevent the refrigerator from spontaneously running in reverse.

REFERENCES:
patent: 3321926 (1967-05-01), Chellis
patent: 3466867 (1969-09-01), Brandes
patent: 3550371 (1970-12-01), Jaspers
patent: 3698182 (1972-10-01), Knoos
patent: 3834172 (1974-09-01), Dehne
patent: 4335582 (1982-06-01), Shaw et al.
patent: 4417448 (1983-11-01), Horn et al.
patent: 4524586 (1985-06-01), Jensen

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