An apparatus for drawing a pre-selectable quantity of liquid, in particular a quantity of water, comprises an input device, at which the respectively desired quantity of liquid to be delivered automatically can be fed in. Located in the path of the liquid is an electrically variable flow-control valve,...http://www.google.com/patents/US5040106?utm_source=gb-gplus-sharePatent US5040106 - Apparatus for drawing a pre-selectable quantity of liquid
