Liquid helium topping-up apparatus

Details Liquid helium topping-up apparatus Liquid helium topping-up apparatus

1992-10-08

1994-03-08

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

Including cryostat

62 507, F17C 702

Patent

active

052917410

ABSTRACT:
To ensure that only liquid helium is delivered to a cryostat dureing liquid helium refill, the arrangement automatically diverts hot gas which is produced during cooling of the transfer tube, away from the cryostat. The arrangement comprises a three way valve which is operated by pressure variations as a result of cooling part of an enclosed volume of helium gas to a temperature near the normal boiling point of the liquid at atmospheric pressure. The arrangement provides the advantage in that the transfer of helium to a cryostat now becomes very much a less skilled operation.

REFERENCES:
patent: 3345827 (1967-10-01), Karbosky
patent: 3850004 (1974-11-01), Vander Arend
patent: 4611623 (1986-09-01), Goodrich
patent: 4744222 (1988-05-01), Murai
patent: 4872314 (1989-10-01), Asano et al.

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