Patent ID: 7591387

Claim:
A fuel filling port in a fuel tank, for receiving a fuel supply nozzle therein, comprising: a port structure formed on the fuel tank for receiving fuel into the fuel tank; a lid disposed in said port structure and being movable between an open position and a closed position in response to insertion of said fuel supply nozzle, said lid being biased to the closed portion; and a plurality of lid locking mechanisms disposed in said port structure for locking said lid in the closed position when said fuel supply nozzle is not inserted, and for unlocking said lid when said fuel nozzle is inserted, wherein each of said lid locking mechanisms comprises: a rotary shaft, a cam fixed to a first end of the rotary shaft such that the cam is rotated when said fuel supply nozzle is inserted, and an engaging member fixed to a second end of the rotary shaft such that the engaging member is rotated when said cam is rotated, said rotation of said engaging member unlocking said lid.