Patent ID: 7735686
Filing Date: 2010-06-15
Classification: A47K,B05B,Y10T

Abstract:
1. A dispenser for dispensing fluids comprising: a pump mechanism operative for pumping fluid from a chamber out of an outlet thereby creating vacuum conditions below atmospheric in the chamber, at least two collapsible fluid containing reservoirs enclosed but for each having an outlet passageway in communication with the chamber, a primary one-way valve for each reservoir permitting flow of fluid from each reservoir through the passageway to the chamber when certain vacuum conditions exist in the chamber relative the reservoir, each one-way valve being in an initial sealed condition preventing flow from its respective reservoir until a threshold vacuum for that valve is exceeded in the chamber by operation of the pump mechanism, the threshold vacuum for each valve being different than the threshold vacuum of all the other valves, wherein after the threshold vacuum of one of the valves is exceeded by operation of the pump mechanism, that valve permitting flow of fluid from its reservoir by further operation of the pump mechanism to create vacuum conditions less than the threshold value of that valve and the other valves until its reservoir is substantially emptied whereafter further operation of the pump mechanism creates a vacuum in the chamber which exceeds the threshold vacuum for another of the valves after which such other of the valves permitting flow of fluid from its reservoir by operation of the pump mechanism.