Fluid handling – Control by change of position or inertia of system – Vent opening or closing on tipping container
Patent
1996-09-30
1998-01-27
Walton, George L.
Fluid handling
Control by change of position or inertia of system
Vent opening or closing on tipping container
137202, 137388, 137433, 123198D, F16K 3122, F16K 3300
Patent
active
057113394
ABSTRACT:
A fuel outflow preventing valve device of the invention is formed of a housing, a plurality of valves, and a plurality of energizing members. The housing has a flow path, a plurality of orifices communicating with the flow path, a plurality of cavities, and a plurality of openings communicating with the cavities. Each cavity communicates with each orifice. Each valve is situated in each cavity and moves to open or close the corresponding orifice. Each energizing member is situated in each cavity to support each valve and has strength such that each energizing member can not move the valve toward the orifice to close the orifice by its own force, but each energizing member can move the valve toward the orifice to close the orifice when fluid enters into the cavity to provide buoyancy to the valve. Therefore, the fuel outflow preventing valve device has a simple structure, and each valve is prevented from being stuck to a valve seat. Also, a length of each valve in a moving direction can be shortened, and a sealing ability can be maintained for a long time.
REFERENCES:
patent: 2770666 (1956-11-01), Knight
patent: 2966160 (1960-12-01), Forrester
patent: 5044389 (1991-09-01), Gimby
patent: 5277168 (1994-01-01), Kondo et al.
patent: 5392804 (1995-02-01), Kondo et al.
patent: 5443561 (1995-08-01), Sakata et al.
patent: 5522417 (1996-06-01), Tomioka et al.
Nifco Inc.
Walton George L.
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