| 摘要 |
A hinged flapper valve is mounted to swing between open and closed positions with respect to a fill opening formed through a base mounted in the outer end portion of a motor vehicle fuel tank filler pipe, the flapper being swung to its open position as an incident to insertion of a fuel nozzle into the filler pipe. A locking ring is rotatably supported on the base for turning between locked and unlocked positions and, when in its unlocked position, frees the flapper to swing to its open position. When the locking ring is turned to its locked position, it draws the flapper into tight engagement with the base to seal the fill opening therein and to hold the flapper securely closed. Turning of the locking ring between its locked and unlocked positions may be effected automatically by a motor adapted to be controlled from inside the vehicle.
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