Commandably actuated cryostat

Details Commandably actuated cryostat Commandably actuated cryostat

1999-02-16

2000-07-04

Doerrler, William

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

F25B 1902

Patent

active

060821191

ABSTRACT:
The subject invention relates to a Joule-Thomson cryostat or refrigeration system in which an expansion valve can be commandably actuated to partially withdraw the core of the expansion valve in order to dislodge and flush contaminants that have collected in the valve passageway, to open the expansion valve to increase flow to accelerate cooldown, and to control flow to regulate the amount of refrigeration produced.

REFERENCES:
patent: Re34748 (1994-10-01), Brown
patent: 3942010 (1976-03-01), Peterson et al.
patent: 4028907 (1977-06-01), Herrington et al.
patent: 4631928 (1986-12-01), Walker
patent: 4738122 (1988-04-01), Walker
patent: 5060481 (1991-10-01), Bartlett et al.
patent: 5181386 (1993-01-01), Brown
patent: 5452582 (1995-09-01), Longsworth
patent: 5595065 (1997-01-01), Boiarski et al.

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