Patent ID: 8365757
Filing Date: 2013-02-05
Classification: B60K,F02M,F16K,Y10T

Abstract:
1. A valve device for a fuel tank provided in an air passage connecting an inside and an outside of the fuel tank, comprising: a valve body having a circular plate shape and including an upper part, and an encircling protruding part protruding downwardly from the upper part, a float body having the valve body on an upper part thereof and a shaft part having a semispherical shape, projecting outward from an upper end surface of the float body and surrounded by the encircling protruding part, a receiving chamber which is formed in the air passage, said receiving chamber receiving the float body to be capable of upward and downward movements, and a valve seat which is formed in the air passage, said valve seat being closed on seating of the valve body by ascent of the float body due to inflow of fuel into the receiving chamber, wherein the valve body and the float body are engaged and combined by respectively coupling two or more coupling parts provided on one of the valve body and the float body with coupled parts provided on the other of the valve body and the float body in a state allowing the upward and downward movements of the valve body, during descent of the float body, one coupling part of the two or more coupling parts is caught first on the coupled part of the other coupling parts so that the valve body is tilted, the other coupling parts restrict tilting of the valve body, a pair of guide means is formed on a side of a central axis of movement of the float body, which when a tilt occurs in the valve body, contacts on a downward side of the tilt of the valve body and corrects the tilt by ascent of the float body, and the float body and the valve body do not contact each other, other than the guide means during ascent of the float body.