Abstract: Sealing system for fuel tank fill head comprising: a shutter that can be moved between an open position, in which fuel may be introduced into the fill pipe, and a closed position in which the fill pipe is closed, the shutter passing from one position to the other under the effect of a thrust exerted by a filling nozzle head; a shield placed upstream of the shutter and that can be moved between an open position, in which the shutter is accessible, and a closed position in which the shutter is protected from the atmosphere by the shield; and a nozzle inhibitor comprising components that can be rotated with respect to an axis of rotation substantially parallel to the longitudinal axis of the fill head and designed so as to enable a movement of the shutter from its closed position to its open position when the mobile components have been moved under the effect of a thrust exerted by the filling nozzle head having a predefined diameter on the mobile components.

Abstract: A closure system for the head of a fuel tank filling pipe, including: an essentially circular closure piece provided with a relief; and a moving part for (un)locking the closure piece by a rotational movement about the axis of the closure piece, the moving part including a relief configured to engage with the relief of the closure piece by a bayonet system. The reliefs are of a symmetrical shape allowing continuous rotation in both the clockwise and anticlockwise directions of the moving part relative to the closure piece.