Patent ID: 7527064
Filing Date: 2009-05-05
Classification: B60K,F16K,Y10T

Abstract:
1. A fuel cutoff valve that is mounted on an upper part of a fuel tank to open and close a connection path that connects an inside of the fuel tank and with outside, the fuel cutoff valve comprising: a casing having (i) a valve chamber that communicates the inside of the fuel tank and the connection path and (ii) a seal part that projects in a circular shape toward the valve chamber, the seal part being provided in the connection path; and a float mechanism having (i) a float that is stored within the valve chamber and that rises according to a fuel fluid level within the fuel tank, (ii) a valve support that is formed on an upper part of the float, and (iii) a seat member mounted on the valve support that opens and closes the connection path by seating on and separating from the seal part, wherein the seat member has (i) a seat part formed from a flexible material and includes a seat surface that seats on and separates from with the seal part and (ii) an elastic deforming part formed along an outer periphery of the seat surface, and (iii) a supported part that projects from an outer periphery of the seat part with a thicker wall than the elastic deforming part and that is mounted for the valve support, the valve support has a bending space with an inner diameter larger than an outer diameter of the seal part, the bending space being configured to be formed to allow elastic deformation of the elastic deforming part when the seat surface seats on the seal part, the valve support has a support projection part projecting from an upper part of the center of the float, and the bending space is formed at an axial center of the support projection part, and the support projection part comprises a support base projecting from the upper part of the center of the float, a disk extending in radial direction from an upper part of the support base, and a cylinder formed facing upward from an outer periphery of the disk, and the bending space is formed by an upper surface of the disk and an inner wall of the cylinder.