Fluid handling – Processes
Patent
1989-04-13
1990-03-06
Cohan, Alan
Fluid handling
Processes
137210, 417 65, G05D 700
Patent
active
049057197
ABSTRACT:
A system and method for pumping liquid fluorocarbons and the like from a pressurized supply container to another container. The system compensates for the inherent vapor pressure drop occuring within any pressurized container of fluorocarbons as the fluorocarbons are pumped out. A phase conversion apparatus is provided to recirculate a portion of the liquid being pumped from the downstream side of the pump, through a phase conversion chamber into the supply tank in a vapor phase. This prevents a vapor pressure drop in the supply tank and avoids the flashing of the liquid into a gas at the discharge connection of the supply container. The invention also comprises an improved fluorocarbon gear pump and pressure regulation means. The gear pump utilized offset gear axes and porous gears to form a liquid film over the gears to prevent deleterious contact in the pump and extend useful pump life.
REFERENCES:
patent: 2033094 (1936-03-01), DeMotte
patent: 2467413 (1949-04-01), Wildback
patent: 4572943 (1986-02-01), Hogfeldt
patent: 4637346 (1987-01-01), Draper
Cohan Alan
Warzecha Gene
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