Abstract: A tank closure mechanism, especially for a fuel tank of an automotive vehicle, with a locking tube pertaining to the cap proper and including a pressure plate and a gasket. The locking tube is rotatable by rotating the cap housing during locking operation of the cap by a latch of a lock cylinder but remains stationary after an unlocking during a rotation of the cap housing. A clamping ring exerting a tightening clamp is rotatable together with the locking tube. A compression spring of a bayonet catch presses against the clamping ring with the spring being supported on the cap and the pressure plate. The locking tube and pressure plate are fashioned so as to be bi-partite and the pressure plate extends over the locking tube with a sliding fit or the like.

Abstract: A fuel tank of a motor vehicle, in which the filter pipe terminates to one side of its rear wall at the top thereof; the filler pipe includes sections extending in horizontal and inclined planes and is provided with an inlet opening adapted to be closed by a closure lid and intended for the insertion of the discharge pipe; the discharge pipe thereby rests against the lower edge of the inlet opening, when filling the tank, while its upper nozzle surface abuts at a support plate, whereby a vent pipe terminates in the filler pipe downstream of the support plate; the discharge edge of the discharge pipe is thereby adapted to abut at the lower inner wall of the rear, straight and obliquely upwardly extending section of the filler pipe which is provided with an indentation directly downstream of this support place of the discharge edge of the discharge pipe in order to assure an unimpaired inflow of the fuel; the support plate, in its turn, leaves sufficiently large open areas for the passage of air, especially of