Cryorefrigerator contaminant removal

Details Cryorefrigerator contaminant removal Cryorefrigerator contaminant removal

Filed on

2007-11-20

Date issued

2007-11-20

Examiner

Jones, Melvin (Department: 3744)

Patent Class

Refrigeration

SubClass

Refrigeration producer

SubSubClass

With lubricant handling means

Type

Reexamination Certificate

Status

active

Patent number

10859429

Description

ABSTRACT:
Disclosed is a method of removing contaminants from a GM type cryogenic refrigerator that incorporates an oil lubricated compressor where such contaminants are introduced during servicing the refrigerator where at least some of the oil is replaced with clean oil.

REFERENCES:
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patent: 5232588 (1993-08-01), Gryder
patent: 5481879 (1996-01-01), Asami et al.
patent: 6336331 (2002-01-01), White et al.
patent: 6488120 (2002-12-01), Longsworth
patent: 7076960 (2006-07-01), Takemasa
Longsworth, R.C., Helium compressor for GM and pulse-tube expanders, 2002, Advances in Cryogenic Engineering: Proceedings of the Cryogenic Engineering Conference, vol. 47, pp. 691-698.

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