Over-fueling prevention valve

Details Over-fueling prevention valve Over-fueling prevention valve

2005-11-01

2005-11-01

Michalsky, Gerald A. (Department: 3753)

Fluid handling

Diverse fluid containing pressure systems

Fluid separating traps or vents

C137S043000

Reexamination Certificate

active

06959720

ABSTRACT:
A fuel valve includes an upper chamber communicating with a ventilation passage of a canister; a lower chamber to be disposed inside a fuel tank; a communicating port between the upper chamber and the lower chamber; and a float member disposed in the lower chamber for blocking the communicating port when fuel flows into the lower chamber. The lower chamber includes a one-way valve formed at a bottom thereof for allowing the fuel to flow out only through the one-way valve, and a fuel inlet formed in a side wall of the lower chamber. When a fuel level inside the fuel tank reaches the main fuel inlet, the fuel flows into the lower chamber to raise the float member. As a result, an internal pressure of the fuel tank increases, so that a sensor at a fueling nozzle side can detect that the fuel tank is filled-up.

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