Fuel tank vent system and diaphragm valve for such system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 8, 1991
Issued Date -
N/A
app pub date -
Oct 29, 1990
filing date -
Jan 25, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fuel tank vent valve disposed between the tank and a carbon canister to provide high volume venting between the tank and the canister under normal operating conditions. A diaphragm type control element within the valve pulls an internal valve plate against a seat when the filler pipe cap is removed thereby to close off the vent between the tank and the canister. The system operates with a filler pipe door seal of the type which is opened by the introduction of a filler nozzle. The vent valve is primarily constructed of molded plastic parts.
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