Cryogenic fluid dispensing system
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United States of America Patent
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app pub date -
Oct 24, 2005
filing date -
Mar 30, 2005
priority date (Note) -
Abandoned
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Abstract
A mobile system for dispensing cryogenic liquid to a use point includes a low pressure bulk tank containing a supply of cryogenic liquid and a high pressure sump in communication with the bulk tank so as to receive cryogenic liquid therefrom. A heat exchanger is in communication with the sump and selectively receives and vaporizes a portion of cryogenic liquid from the sump. The resulting vapor is directed to the sump so as to increase the pressure therein. A pressure builder is in circuit between the sump and the bulk tank. The pressurized cryogenic liquid may be dispensed from the sump via a dispensing hose or directed to the pressure builder so as to pressurize the bulk tank. If the latter is selected, pressurized cryogenic liquid is dispensed from the bulk tank via a second dispensing hose. Operation of the system valves is automated by a controller.
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