Patent ID: 6959720

Claim:
A fuel valve for connecting a fuel tank and a canister, comprising: an upper chamber communicating with the canister, a lower chamber connected to the upper chamber to be disposed inside the fuel tank and having a side wall and a bottom, said lower chamber having first and second chambers communicating with the upper chamber, respectively, a communicating port disposed between the upper chamber and the lower chamber for communication therebetween, and including a first communicating port and a second communicating port having a size smaller than that of the first communicating port so that the first chamber communicates with the upper chamber through the first communicating port and the second chamber communicates with the upper chamber through the second communicating port, a float member disposed in the lower chamber for blocking the communicating port when a fuel enters the lower chamber, said float member including a first float situated in the first chamber for blocking the first communicating port and a second float situated in the second chamber for blocking the second communicating port, one of a bottom orifice and a one-way valve formed in the bottom of the lower chamber, said one of the bottom orifice and the one-way valve preventing the fuel to flow into the lower chamber therethrough and allowing the fuel to flow out from the bottom of the lower chamber therethrough, and a fuel inlet formed in the side wall of the lower chamber for allowing the fuel to enter the lower chamber so that an inner pressure in the fuel tank increases by entering the fuel into the lower chamber after the fuel reaches the fuel inlet.