Piston sealing arrangement for a cryogenic refrigerator

Details Piston sealing arrangement for a cryogenic refrigerator Piston sealing arrangement for a cryogenic refrigerator

1983-06-01

1984-02-21

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 3, 277 15, 92 87, 92162R, F01B 3100, F16J 1540, F16J 100

Patent

active

044325568

ABSTRACT:
A sealing arrangement for a rectilinear reciprocable piston within a cryoic refrigerator comprising a buffer defined by dual O-rings disposed around the circumference of the piston and containing pressurized gas of the same type as the refrigeration gas. The buffer limits or prevents both the entrance of contaminants and also the escape of the refrigeration gas.

REFERENCES:
patent: 3104619 (1963-09-01), Swarthout
patent: 3216651 (1965-11-01), King et al.
patent: 3818805 (1974-06-01), Johansson
patent: 3848877 (1974-11-01), Bengtsson et al.
patent: 3892166 (1975-07-01), Johansson
patent: 4093239 (1978-06-01), Sugahara
patent: 4247121 (1981-01-01), Bergman
patent: 4355519 (1982-10-01), Kerchevol et al.

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