Fluid handling – Control by change of position or inertia of system – Vent opening or closing on tipping container
Patent
1986-09-24
1988-08-02
Nilson, Robert G.
Fluid handling
Control by change of position or inertia of system
Vent opening or closing on tipping container
137587, 220 85VS, 220 85VR, 220 86R, F16K 1736
Patent
active
047608587
ABSTRACT:
A fuel vapor recovery system of a motor vehicle is disclosed including a valve. The valve is situated between a fuel tank and a conduit leading from the fuel tank to a canister. The valve includes a chamber having a first opening to the fuel tank and a second opening to the conduit. The valve also includes a ball for closing the first opening, the ball having a mass selected to effect a first closing pressure on the first opening when the vehicle is stationary. The size of the ball is selected relative to the chamber to permit movement within the chamber to effect a second closing pressure less than the first closing pressure when the vehicle is subjected to vibration. The first closing pressure is selected to produce a predetermined head pressure in the fuel tank during introduction of fuel into the fuel tank which effectively blocks the introduction of fuel in excess of a predetermined maximum fuel capacity, thereby preventing overfilling of the fuel tank. The ball vibrates within the chamber to open the first opening and release pressure in the fuel tank.
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Nilson Robert G.
Stant Inc.
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