The present addition relates to the fitting of a miniature vane pump with flexible vanes driven by friction on the lower shaft of the screw, in order to regulate the flow rate of liquid, whether it be fluid or thick (viscous) economically; the pump is, however, fed by a liquid dispenser located above the chassis of the screw, either by gravity, or using a slight pressure. As regards the miniature pump, the device consists of a jaw (1) allowing quick fastening to the chassis. It includes a compression spring inside a tube (2) which maintains a slight pressure on the driving pulley (6). The driving discs are interchangeable to allow different flow rates. <IMAGE>
