Dispensing device intended to equip a container, particularly a container containing a cosmetic product, comprises a base part and an assembly which can move with respect to the base part and defines therewith a variable volume pumping chamber. The assembly comprises a piston mobile between two extreme...http://www.google.es/patents/US6655556?utm_source=gb-gplus-sharePatente US6655556 - Dispensing device intended to equip a container
