Patent ID: 6286539
Filing Date: 2001-09-11
Classification: B60K,F16K,Y10T

Abstract:
A fuel cutoff valve that is to be partly inserted in a fixation hole formed in an upper tank wall of a fuel tank, so as to be mounted on said upper tank wall, said fuel cutoff valve comprising:a cover that is made of a first resin material, which enables said cover to be thermally welded to said upper tank wall, said cover including a circular welding end that is constructed and arranged to be thermally welded to said upper tank wall to surround a circumference of the fixation hole, a fuel conduit that is constructed and arranged to connect said fuel tank to the outside, and a support member that is constructed and arranged to be inserted into the fixation hole;a casing that is made of a second resin material, which has a smaller fuel swelling property than the first resin material, said casing including a valve chest that is constructed and arranged to connect said fuel tank to a connection conduit;wherein said casing has an upper protrusion that forms part of said connection conduit, said cover including a mating recess, in which said upper protrusion is fitted;a valve member that is accommodated in said valve chest to open and close said connection conduit according to a level of a liquid fuel in said fuel tank;mating engagement elements that are respectively formed on said support member and said casing, said mating engagement elements engaging with each other to join said support member and said casing; anda holder unit that is formed on said casing and is in contact with said support member, said holder unit being constructed and arranged to increase a supporting force against said support member when said support member swells in the liquid fuel;wherein said holder unit includes a holder that is protruded from a side wall of said casing, so that said holder holds a lower end of said support member with the side wall of said casing.