Patent ID: 8042788
Filing Date: 2011-10-25
Classification: F16K,Y10T

Abstract:
1. A valve device adapted to be mounted in a fuel tank, comprising: a cover having a flange portion jointed to an edge part with a first welding portion for being welded to an opening formed in said fuel tank; a cylindrical case fixed to a lower side of said flange portion of said cover; and a valve axially movably disposed in said case including a shaft portion made of resin, a thin disk portion radially extending from said shaft portion, and a rib portion including a ring like inner rib protruding along an inner circumference of said disk portion and a ring like outer rib protruding along an outer circumference of said disk portion, said disk portion, said inner rib, and said outer rib being formed monolithically with said shaft portion; and a ring-like seal projection projecting from a lower end of the case to be pressure-contacted with said disk portion to seal said valve, wherein the inner rib and the outer rib are protruded in an opposite direction to the shaft portion, and the ring-like seal projection is brought into contact with the disk portion provided between the inner rib and the outer rib so that the sufficient flatness of the disk portion can be ensured by the inner rib and the outer rib.