Fail-safe cryosurgical instrument

Details Fail-safe cryosurgical instrument Fail-safe cryosurgical instrument

1998-02-26

1999-09-28

Dvorak, Linda C. M.

Surgery

Instruments

Cyrogenic application

62 451, 251254, A61B 1736

Patent

active

059579188

ABSTRACT:
In a cryosurgical instrument having a dewar and a cap which is threaded onto the dewar when in use, with a main valve portion secured to the cap by threads, the handedness of the threads on the main valve portion are opposite to the handedness of the cap threads, whereby applying thrust through the main valve portion to remove the cap from the dewar will tend to tighten, rather than loosen the main valve portion in the cap.

REFERENCES:
patent: 947382 (1910-01-01), Goosman
patent: 2602628 (1952-07-01), Turenne et al.
patent: 3630403 (1971-12-01), Berg
patent: 5222999 (1993-06-01), Byrne
patent: 5649639 (1997-07-01), Dolvet et al.
patent: 5775541 (1998-07-01), Perkins

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