Patent ID: 7168441
Filing Date: 2007-01-30
Classification: B60K,F16K,Y10T

Abstract:
1. A fuel cutoff valve that is attached to an upper wall of a fuel tank, and works by a liquid level in the fuel tank, the fuel cutoff valve comprising: a casing body that has a valve chamber to connect inside of the fuel tank with outside and a holder element located above the valve chamber; a movable valve element that is held by the holder element in a vertically movable manner; a first connection conduit and a second connection conduit that are provided to face the movable valve element and to connect inside of the valve chamber with the outside, wherein the area of the first connection conduit is larger than that of the second connection conduit; and a valve mechanism that is received in the valve chamber and has a float moving up and down according to the fuel level in the fuel tank, wherein the valve mechanism has a seat plane, the seat plane being configured to move up with an upward movement of the float to shut off the first connection conduit when the fuel level rises to a preset first fluid level, and to move up with a further upward movement of the float to press the movable valve element up and to shut off the second connection conduit when the fuel level rises to a preset second fluid level that is higher than the preset first fluid level wherein the first conduit connection is formed in the movable main body and the second connection conduit is formed between the movable valve element and the holder element and connects the valve chamber with the outside except when the seat plane shuts off the second connection conduit.