| 摘要 |
Disclosed is an automatically closing tank cap (1) for the filler neck of a fuel tank. The filler neck has a protective flap that is hingeably connected thereto. The tank cap has a sealing ring (2) which is detachably mounted on the filler neck and a sealing flap arrangement (3) that is rotationally mounted on the sealing ring (2) and provided with a ring-shaped component (12), in addition to a sealing flap (15) that is pivotally hinged thereon an d a locking device consisting of at least one detent spring (18) and detent lu gs (7), whereby the sealing flap arrangement (3) can only be rotated in a singl e direction and the at least one detent spring (18) is arranged on the ring- shaped component (12) and detent lugs (2) are arranged on the sealing ring ( 2).
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