Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1994-10-11
1996-03-12
Hepperle, Stephen M.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
123519, 137587, F16K 2400
Patent
active
054978009
ABSTRACT:
In a fuel vapor processing device for transferring fuel vapor from a fuel tank to a canister when fuel is fed into the fuel tank through a fuel fill pipe or when the pressure in the fuel tank is raised to a predetermined value, a pressure given through the fuel fill pipe is applied to one side of a first diaphragm valve body forming a first diaphragm valve while a pressure given through a fuel tank passageway is applied to the other side thereof, so that, when the pressure in the fuel tank passageway is increased while fuel is being supplied into the fuel tank, a first communicating hole is opened; and the atmospheric pressure is applied to one side of a second diaphragm valve body forming a second diaphragm valve while a pressure given through the fuel tank passageway is applied to the other side, so that when the pressure in the fuel tank becomes higher than the atmospheric pressure by a predetermined value a second communicating hole is opened. Thus, in both cases, the fuel vapor formed in the fuel tank is moved to the canister.
REFERENCES:
patent: 4343281 (1982-08-01), Uozumi et al.
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patent: 4894072 (1990-01-01), Turner et al.
patent: 5117797 (1992-06-01), Telep et al.
patent: 5318069 (1994-06-01), Harris
patent: 5327934 (1994-07-01), Thompson
Kasugai Joji
Nagino Yoshihiro
Ohashi Tamiyoshi
Hepperle Stephen M.
Toyoda Gosei Co,., Ltd.
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