Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1988-05-27
1989-12-12
Fox, John
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
220202, F16K 1736
Patent
active
048860891
ABSTRACT:
A venting valve (2) for a liquid tank, such as a vehicle fuel tank, has a float (64) confined in a cage (10). A valve element (86) is mounted on a mounting post (76, 78) carried by the top surface (72) of the float (64). The element (86) is pivotable about a horizontal axis (X). A rising liquid level in the cage (10) causes the float (64) to move upwardly and seat the valve element (86) against a valve seat (42). When the liquid level falls and the float (64) descends, the valve element (86) pivots on the mounting post (76, 78) and thereby acts as a lever to increase the effective weight of the float (64). This enables the lightweight float (64) to overcome vapor pressure in the tank and unseat the valve element (86). The valve of the invention may be incorporated into a cap (102) for closing a vehicle fuel tank filling and venting tube.
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Gabrlik Zdenek
Green Charles J.
Morris John M.
Barnard Delbert J.
Fox John
GT Development Corporation
Pauly Joan H.
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