Peter J. Littrup,Alexei V. Babkin,Robert V. Duncan,Pramod Kerkar,Sergey T. Boldarev
申请号：
US14087947
公开号：
US09408656B2
申请日:
2013.11.22
申请国别(地区):
US
年份:
2016
代理人:
摘要：
A method of cooling a material including the steps of (i) providing a cryotherapy instrument, (ii) positioning a portion of the cryotherapy instrument adjacent the material to be cooled, and (iii) circulating a cryogenic fluid through the cryotherapy instrument under physical conditions near a critical point of a liquid-vapor system for the cryogenic fluid. The critical point defines a point in a phase diagram of the liquid-vapor system where molar volumes are substantially equivalent for liquid and gas, whereby vapor lock associated with cooling of the cryotherapy instrument is avoided.
