Patent ID: 7784484

Claim:
A fuel leakage preventing valve, in which a vertically movable float valve is arranged in a chamber defined inside a housing and in which a valve seat of the housing communicating with an outside is opened and closed by the float valve, which comprises: a protruding step portion which is formed upwardly a center of an upper surface of the float valve; a retainer fixed to the upper surface side of the float valve, the retainer including: a flange portion covering the upper surface of the float valve; and a cage portion raised from the flange portion to define an accommodating space in conjunction with the protruding step portion of the float valve, the cage portion having a top portion and a peripheral portion continuous with the top portion, the top portion being relatively higher in height at a center of the cage portion compared to the peripheral portion; and a valve body for opening and closing the valve seat of the housing, the valve body being rockably accommodated in the accommodating space defined by the cage portion, wherein the accommodating space communicates downwardly with an upper surface of the flange portion of the retainer through a communication hole, and wherein the cage portion has an inner peripheral wall that extends obliquely inwards so as to cross a locus of rotational movement about an end of the valve body.