Patent ID: 7946455

Claim:
A metering device for at least one medium, with a medium storage unit, and with a pumping system connected to the medium storage unit, said medium storage unit or said pumping system comprising a venting valve that is held in the closed position by elastic force, wherein a control member is assigned to the venting valve in such a way that the control member opens the venting valve in the event of a pumping movement of the pumping system, wherein the venting valve and the control member are provided with mutually corresponding control surfaces that are brought into contact with one another for opening the venting valve, wherein the venting valve comprises a tubular cuff which, coaxially with respect to a pump axis, encloses a rotationally symmetrical pump section, and wherein the control surfaces are oriented at an inclination with respect to the pump axis in such a way that, during a pumping movement, a radial movement component directed outward from the pump axis is applied to the tubular cuff to open the venting valve.