Patent ID: 6568561
Filing Date: 2003-05-27
Classification: A47K

Abstract:
A device for the linear drive of a pumping member in a dispenser for free-flowing media of the type having an electric motor, a sensor with a control circuit to detect the presence of a hand to be supplied with the media to trigger a pumping process and interrupt the pumping process when the hand is no longer present in a region receiving the media in such a way that the media remains in the dispenser without dripping, comprising a crank mechanism connected to the electric motor, the crank mechanism including a crank disc and a push rod transmitting a linear movement to a piston rod; disengagable coupling members being located between the push rod and the piston rod to disengage the piston rod when the hand is no longer present, and spring-loaded means to re-engage the coupling members upon a further movement of the crank disc of the crank mechanism.