Venting cryosurgical instrument

Details Venting cryosurgical instrument Venting cryosurgical instrument

1998-02-26

1999-09-07

Cohen, Lee

Surgery

Instruments

Cyrogenic application

62293, A61B 1736

Patent

active

059479604

ABSTRACT:
The cap which is threaded onto the dewar of a cryosurgical instrument has a vent hole therethrough which is normally closed off by a gasket when the cap is secured to the dewar, but which can allow the venting of gaseous cryogen therethrough when the cap is loosened. The threads of the cap have a scalloped region in which the threads have been machined away so as to provide a passage for gaseous cryogen, whereby, when the cap is loosened on the dewar, pressure therein is released by gas escaping either through the hole or through the scalloped region of the threads.

REFERENCES:
patent: 3425417 (1969-02-01), Kanbar et al.
patent: 4116199 (1978-09-01), Byrne

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