Inventors:
Meredith W. Meece - Monroe LA
William T. Thurmon - Monroe LA
Assignee:
Thomas Industries Inc. - Monroe LA
International Classification:
F04B 4900
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.