Cryostat with pressure-relief cover
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United States of America Patent
Stats
-
Mar 10, 1992
Grant Date -
N/A
app pub date -
May 10, 1990
filing date -
May 13, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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