Patent ID: 6755206
Filing Date: 2004-06-29
Classification: F16K,Y10T

Abstract:
A fuel cutoff valve adapted to be mounted on an upper part of a fuel tank for switching communication and cutoff between an inside and an outside of said fuel tank by opening and closing a connection conduit, said fuel cut off valve comprising:a casing forming a valve chamber communicating with said fuel tank; a cover including a cover welding end that is made of a first resin material, which is thermally weldable to said upper part of said fuel tank, and that is configured to be thermally welded to said upper part of said fuel tank, and a cover supporting part for supporting an upper part of said casing; a valve element accommodated in said valve chamber to open and close the connection conduit; a sealing member disposed on an outer periphery of said casing; a seal holding member that is made of a second resin material, which is thermally weldable to said cover supporting part, and that has a higher shape stability against fuel than said cover, said seal holding member including a pressing face adapted to press said sealing member from an outside of said casing and a holding-member-side welding end configured to be thermally welded to said cover supporting part so as to press said sealing member, thereby sealing the inside of said fuel tank from the outside and supporting said casing.