Self-pressurizing cryogenic apparatus and method

Details Self-pressurizing cryogenic apparatus and method Self-pressurizing cryogenic apparatus and method

1980-12-22

1983-01-11

Howell, Kyle L.

Surgery

Truss

Pad

128400, 62 50, 62514JT, A61B 1736

Patent

active

043677436

ABSTRACT:
Apparatus and method for dispensing a jet of cryogenic coolant selectively in single gaseous phase and in dual gaseous and finely divided liquid phase from a self-pressurizing source of heat saturated liquid coolant. The coolant is stored under constant pressure and in a heat-saturated condition and, when needed, is partially expanded into an expansion chamber equipped with a coolant jetting orifice and a venting orifice regulatable to control coolant flow from the jetting orifice in single or dual phase. The liquid coolant is conveniently stored in a hand-held dewar flask equipped with a pressure relief valve and utilizing a relatively long, small bore passage as the coolant jetting orifice.

REFERENCES:
patent: 2645097 (1953-07-01), Posch
patent: 3272203 (1966-09-01), Chato
patent: 3651813 (1972-03-01), Bryne
patent: 3696813 (1972-10-01), Wallach
patent: 3924628 (1975-12-01), Droegemueller et al.
patent: 4043341 (1977-08-01), Tromovitch

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