Patent ID: 6988519

Claim:
Filler device, comprising a filler neck and a closing cap closing a filler opening at the filler neck, which said closing cap has a cap bottom, a surrounding cap wall originating from the cap bottom, and a centering element arranged in an interior on the closing cap, said centering element interacting with a countercentering element situated on the filler neck, wherein the countercentering element is situated at a radial distance with respect to an interior pipe surface of the filler neck and within an end section of the filler neck in an area of the filler opening, wherein a surrounding sealing device is situated on the interior side of the closing cap in a transition area between the bottom and the wall, wherein the inside diameter of the closing cap is larger than the outside diameter of the filler neck, and wherein, when the closing cap is fitted on, the sealing device comes to rest on the exterior pipe surface of the filler neck.