Self-pressurizing cryogenic apparatus and method

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

F - Mech Eng,Light,Heat,Weapons

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F25B 39/02 (2006.01) A61B 17/32 (2006.01) A61B 18/02 (2006.01) F17C 9/00 (2006.01) F25D 3/10 (2006.01)

Patent

CA 1093332

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. -1-

278421

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