Refrigeration – Cryogenic treatment of gas or gas mixture – Solidification
Reexamination Certificate
2007-01-02
2007-01-02
Doerrier, William C. (Department: 3744)
Refrigeration
Cryogenic treatment of gas or gas mixture
Solidification
C062S054100
Reexamination Certificate
active
11165528
ABSTRACT:
Liquid nitrogen is filled in a low temperature vessel; an ejector that sucks liquid nitrogen by blowing a cooling agent (liquid or gas) such as low temperature helium gas or liquid helium of pressure higher than in the space within the vessel is disposed in the vessel; the liquid nitrogen blown with the cooling agent is cooled by the cooling agent to become fine particles of solid nitrogen which fall down; and gas in a space of the vessel is discharged out of the vessel so as to maintain the pressure of the space higher than the atmospheric pressure.A gaseous phase of liquid nitrogen in an adiabatic vessel is depressurized to vaporize nitrogen in a liquid phase so that a temperature of the nitrogen is reached to the triple point of nitrogen by lowering temperature thereby and solid nitrogen is produced by keeping at the triple point, and that the produced solid nitrogen is transformed into slush by stirring the content of the adiabatic vessel.In a method for cooling a super conductive body in which a material showing a state of super conductance in the vicinity of the temperature of liquid nitrogen or of the temperature liquid nitrogen and solid nitrogen coexist is used, a method for cooling a super conductive body characterized in that the super conductive body is immersed in slush nitrogen held in an adiabatic vessel, and that the body is contacted with slush nitrogen to cool.
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Hattori Kazuhiro
Ikeuchi Masamitsu
Kawamura Kuniaki
Machida Akito
Matsuo Kouichi
Doerrier William C.
Mayekawa Mfg. Co., Ltd.
Rossi Kimms & McDowell LLP
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