System for venting cryogen from a cryostat

Details System for venting cryogen from a cryostat System for venting cryogen from a cryostat

1991-04-01

1992-06-02

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

With vapor discharged from storage receptacle

62125, 220745, 220749, 285904, F17C 704

Patent

active

051176408

ABSTRACT:
A system is provided for controllably venting cryogen of extremely low temperature from a cryostat, wherein a conduit formed of selected metal provides a path of flow for the cryogen from the cryostat to an exhaust system. A gauge is coupled to the conduit, along the path of flow, by means of a bushing which thermally isolates the gauge from the metallic conduit, which is at an extremely low temperature. Thus, the gauge, which is used to continually monitor cryogen pressure, does not become unreadable due to icing or frosting as a result of heat loss from the gauge to the conduit. The bushing is formed from a material such as GC-10, and includes an intermediate portion for spacing the bushing away from the metallic conduit, and also for enclosing a dead space which substantially reduces heat transfer directly between the gauge and cryogen in the conduit.

REFERENCES:
patent: 3181589 (1965-05-01), Phelps
patent: 3199303 (1965-08-01), Haumann et al.
patent: 3298187 (1967-01-01), Short
patent: 3548856 (1970-12-01), Vant
patent: 3874323 (1975-04-01), Rottig
patent: 3884511 (1975-05-01), Germanson
patent: 3916641 (1975-11-01), Mullins
patent: 4046407 (1977-09-01), Porreco
patent: 4350017 (1982-09-01), Kneip et al .
patent: 4367743 (1983-01-01), Gregory

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