Patent ID: 7424897

Claim:
A connection coupling for transferring gaseous and/or liquid fluids, especially for filling gas tanks of motor vehicles, comprising an inlet region which comprises an inlet valve and is connected with a supply line and a ventilation line and comprises a pressure compensation chamber and a ventilation valve, the connection coupling having a longitudinal axis, wherein the ventilation valve is formed by a sealing disk which can be moved in the axial direction of the connection coupling in a controlled manner towards the inlet valve and away from the same, and wherein the sealing disk comprises a pair of sealing surfaces generally facing in opposite directions, each of which is formed on an end of the sealing disk and lies generally normal to the longitudinal axis of the coupling, the sealing disk further comprising two abutment surfaces disposed between the pair of sealing surfaces, the two abutment surfaces being configured to limit movement of the sealing disk in both longitudinal directions.