Cryogenic refrigerator

Details Cryogenic refrigerator Cryogenic refrigerator

1987-06-09

1989-10-31

Capossela, Ronald C.

Refrigeration

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

60520, F25B 900

Patent

active

048774340

ABSTRACT:
A modified Stirling cycle cryogenic refrigerator having a cold head, compressor and expander cylinders connected by a channel, and a compressor piston and an expander piston reciprocally mounted in the respective cylinders. A thin-walled hollow, evacuated, cylinderical metal extender is mounted on the side of the expander piston close to the cold head for shielding the expander from the low temperatures of the working gas in the vicinity of the cold head.

REFERENCES:
patent: 3521461 (1970-07-01), Granryd
patent: 3698182 (1972-10-01), Knoos
patent: 4282716 (1981-08-01), Momose et al.
patent: 4498296 (1985-02-01), Dijkstra et al.
patent: 4543793 (1985-10-01), Chellis et al.

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