Patent ID: 6505469
Filing Date: 2003-01-14
Classification: F17C

Abstract:
A system for dispensing pressurized cryogenic fluid comprising:a) a storage vessel including a jacket and an inner tank with the inner tank positioned in the jacket and the inner tank containing a supply of cryogenic liquid with a head space there above; b) a use line in communication with the inner tank so that cryogenic fluid may be dispensed therefrom; c) an internal pressure builder in communication with the inner tank and positioned between the inner tank and the jacket of said storage vessel; and d) an external pressure building heat exchanger in communication with said internal pressure builder and the head space of the inner tank of said storage vessel; whereby cryogenic liquid from the inner tank flows into said internal pressure builder and, due to heat added by said internal pressure builder, an exiting fluid is driven to said external pressure building heat exchanger where the fluid is heated and a resulting gas is delivered to the head space of the inner tank so that the inner tank is pressurized.