Dual pneumatic volume for cryogenic cooler

Details Dual pneumatic volume for cryogenic cooler Dual pneumatic volume for cryogenic cooler

1982-04-19

1983-10-18

Capossela, Ronald C.

Refrigeration

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

60520, F25B 900

Patent

active

044097930

ABSTRACT:
A dual pneumatic volume means in the ambient end of a free displacer cyroic cooler to provide strong pneumatic braking and dwell times of the displacer movement at both the top dead center and bottom dead center of the displacer waveform. A second pneumatic piston is positioned between the end of the cooler housing and extends into the first pneumatic piston attached to the displacer to form a pneumatic spring volume within the first piston to accomplish the strong pneumatic braking.

REFERENCES:
patent: 4090859 (1978-05-01), Hanson
patent: 4092833 (1978-06-01), Durenec
patent: 4277947 (1981-07-01), Durenec

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