System and method for preventing the release of vapor into the a

Details System and method for preventing the release of vapor into the a System and method for preventing the release of vapor into the a

1995-11-08

1996-10-22

Freay, Charles G.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417 53, 418261, 141 1, 141 59, F04B 4900

Patent

active

055671268

ABSTRACT:
A vane pump is provided which can be used for the pumping of gasoline vapor, particularly in a sealed environment. The vane pump has an inlet, an outlet and a safety valve that recirculates vapor from the outlet to the inlet when a blockage occurs upstream or downstream of the pump. The invention further provides a system and method, incorporating the pump, for recovering gasoline vapor proximal to a nozzle dispensing liquid gasoline.

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