Cryostat with pressure-relief cover

Details Cryostat with pressure-relief cover Cryostat with pressure-relief cover

1990-05-10

1992-03-10

Makay, Albert J.

Refrigeration

Storage of solidified or liquified gas

Including cryostat

62 451, 220 891, 220208, 220366, F17C 702, G01F 1110, B65D 2500

Patent

active

050940848

ABSTRACT:
The invention relates to a cryostat, in particular a helium cryostat with an additional nitrogen tank and a vacuum section, comprising a pressure-relief cover arranged at the outside of the tank wall of the cryostat for closing an opening therein. A locking device by which the said pressure-relief cover is retained in position on the tank wall of the cryostat and which, in its closed position, urges the pressure-relief cover against the edge of the tank opening, under the action of a spring, in such a way that the pressure-relief cover is permitted to be lifted off slightly in the presence of a slight overpressure, against the action of a spring, while in the presence of an important overpressure the locking device assumes its open position in which the pressure-relief cover is released from the tank opening, urges the pressure-relief cover automatically against the tank wall so as to close the opening of the tank edge again after a slight overpressure has been released, but releases the opening when an important overpressure prevails in the cryostat. This arrangement prevents damages to the cryostat and avoids the risks connected therewith.

REFERENCES:
patent: 1645722 (1927-10-01), Raymond
patent: 2070661 (1937-02-01), Hughes
patent: 3107498 (1963-10-01), Messer
patent: 3274788 (1966-09-01), Hoffman et al.
patent: 3948409 (1976-04-01), Ovchinnikov et al.
patent: 4109819 (1978-08-01), Kushman et al.
patent: 4217930 (1980-08-01), Lerner et al.
patent: 4516404 (1985-05-01), Laskaris
patent: 4516599 (1985-05-01), Nakaya et al.
patent: 4878352 (1989-11-01), Weber et al.
patent: 4909276 (1990-03-01), Bayly et al.
Cryolab Technical Data Bull No. A017A (rev. 7/85).

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