초록 ▼

Provided is a fuel cutoff valve that reduces the emission of fuel vapors from within fuel tanks. The fuel cutoff valve is mounted by partial insertion into a fixation hole provided in an upper tank wall of a fuel tank. The fuel cutoff valve comprises a cover, a casing, a float, and a spring. In the

Provided is a fuel cutoff valve that reduces the emission of fuel vapors from within fuel tanks. The fuel cutoff valve is mounted by partial insertion into a fixation hole provided in an upper tank wall of a fuel tank. The fuel cutoff valve comprises a cover, a casing, a float, and a spring. In the cover, a matrix of polyacetal having excellent resistance to fuel permeation reduces emission of fuel vapors into the atmosphere, while a dispersed phase of polyethylene in the matrix allows welding to fuel tank.

대표청구항 ▼

1. A fuel cutoff valve configured for partial insertion into a fixation hole formed in an upper tank wall of a fuel tank, the upper tank wall being made of a first resin material, the fuel cutoff valve comprising:a cover including (i) a circular welding end, the cover being constructed and arranged

1. A fuel cutoff valve configured for partial insertion into a fixation hole formed in an upper tank wall of a fuel tank, the upper tank wall being made of a first resin material, the fuel cutoff valve comprising:a cover including (i) a circular welding end, the cover being constructed and arranged to be thermally welded to the upper tank wall to surround a peripheral portion of the fixation hole and (ii) a fuel conduit constructed and arranged to connect to a location exterior to the cover; a casing constructed of a second resin material having a greater fuel permeation-resistant property than the first resin material, the casing including a valve chest constructed and arranged to connect the fuel tank to the fuel conduit; and a valve body positioned in the valve chest to open and close the fuel conduit according to a level of a liquid fuel in the fuel tank; wherein the cover is constructed of a third resin material, the third resin material containing the first and second resin material such that the first material is dispersed a matrix of the second resin material.