A fuel tank check valve, which can prevent one portion of a coil portion of a torsion coil spring from being stuck on a stepped portion of a pivot so as to generate an operational failure of a flap, is provided. A fuel tank check valve (2) includes a cylindrical member (6) defining a flow channel for a fuel fluid; a flap (8) axially supported on the cylindrical member (6) through a pivot (40); and a torsion coil spring (10) urging the flap (8) in a closing direction. The pivot (40) includes a large diameter portion (48) around which a coil portion (50) of the torsion coil spring (10) is wound; and a first small diameter portion (44) and a second small diameter portion (46) coaxial with each other, and projecting into a shaft hole (60) provided in either one of the cylindrical member (6) or the flap (8). The first small diameter portion (44) is adjacent to the large diameter portion (48), and is off-centered to a side where the torsion coil spring (10) presses against the pivot (40) relative to the large diameter portion (48).


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    Title :

    FUEL TANK CHECK VALVE


    Additional title:

    KRAFTSTOFFTANKRÜCKSCHLAGVENTIL
    CLAPET ANTI-RETOUR DE RÉSERVOIR DE CARBURANT


    Contributors:
    WADA TOSHIO (author)

    Publication date :

    2019-03-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / F16K VALVES , Ventile



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