Apparatus and method for holding a cryogenic fluid and...

Details Apparatus and method for holding a cryogenic fluid and... Apparatus and method for holding a cryogenic fluid and...

F - Mech Eng,Light,Heat,Weapons

17

C

F17C 13/00 (2006.01) B60K 15/07 (2006.01) B65D 81/20 (2006.01) B65D 81/38 (2006.01) F04B 15/00 (2006.01) F17C 3/08 (2006.01) F17C 9/02 (2006.01)

Patent

CA 2454458

The apparatus comprises a double walled vacuum insulated vessel defining a cryogen space for holding a cryogenic fluid, a pump assembly comprising a pump with a suction inlet disposed within the cryogen space, and at least one elongated member extending from the pump to a drive unit disposed outside the cryogen space. The elongated member comprises an elongated non-metallic section that has a thermal conductivity that is less than that of a structurally equivalent elongated stainless steel member of the same length. In preferred embodiments, the elongated member can be one or both of a drive shaft or a rigid structural member for supporting the pump and holding it in a fixed relationship to the drive unit. The method employs the apparatus to increase hold times for holding cryogenic fluids by reducing heat leak into the cryogen space.

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