Receptacles – Closures – With condition responsive vent or valve
Patent
1987-06-16
1988-11-29
Hall, George T.
Receptacles
Closures
With condition responsive vent or valve
220303, 220204, 220DIG33, 137 43, B65D 5116
Patent
active
047875291
ABSTRACT:
A fuel cap for use in a vehicle fuel system filler neck is provided. The fuel cap includes a closure for closing the filler neck and a pressure relief valve that is movable between a filler neck-venting position and a non-venting position. A roll-over control assembly is provided for selectively utilizing liquid fuel and fuel vapor in the filler neck to exert a closing force on the pressure relief valve so that the pressure relief valve is moved to its non-venting position to block discharge of liquid fuel to the atmosphere through the pressure relief valve during vehicle rollover. The roll-over control assembly cooperates with the pressure relief valve to define a venting control chamber for containing fuel and a fuel vapor in a predetermined region to permit the fuel and fuel vapor to exert the closing force on the pressure relief valve. A passageway is provided for establishing communication of fuel and fuel vapor in the filler neck with the venting control chamber. The roll-over control assembly also includes a valve in the passageway for blocking the flow of fuel and fuel vapor through the passageway until the force exerted by the fuel and fuel vapor in the filler neck upon the valve exceeds a predetermined threshold force during vehicle rollover or the like.
REFERENCES:
patent: 1893942 (1933-01-01), Jensen
patent: 4000828 (1977-01-01), Crute et al.
patent: 4162021 (1979-07-01), Crute
patent: 4685584 (1987-08-01), Harris
Hall George T.
Stant Inc.
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