System and method for preventing the release of vapor into the atmosphere
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United States of America Patent
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Oct 22, 1996
Issued Date -
N/A
app pub date -
Nov 8, 1995
filing date -
Jan 31, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
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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