Fuel vapor recovery control valve device

Details Fuel vapor recovery control valve device Fuel vapor recovery control valve device

1995-04-21

1997-06-24

Rivell, John

Fluid handling

Systems

System with plural openings, one a gas vent or access opening

123519, 141 59, F16K 2404

Patent

active

056409931

ABSTRACT:
A fuel vapor recovery control valve device, for controlling the discharge of fuel vapor from a fuel tank having a fuel filler port, includes a housing; a first valve assembly, which is moved up and down by a diaphragm which divides the space in the housing into an upper chamber and a lower chamber; and a second valve assembly provided in the lower chamber. The diaphragm is of double operation film structure including a central node portion, and an intermediate node portion between the central node portion and its outer peripheral portion. A cylindrical partition wall, which is abutted against the central node portion of the diaphragm, divides the upper chamber into an upper inside chamber, which is communicated with a first vapor flow-in port of the housing, and an upper outside chamber, which is communicated through a signal port with the fuel filter port. Thus, the first vapor flow-in port can be sealingly closed by the diaphragm.

REFERENCES:
patent: 4790349 (1988-12-01), Harris
patent: 5099880 (1992-03-01), Szlaga et al.
patent: 5111795 (1992-05-01), Thompson
patent: 5318069 (1994-06-01), Harris
patent: 5524662 (1996-06-01), Benjey et al.

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