Patent ID: 6564971
Filing Date: 2003-05-20
Classification: B01F,B67D,F04B

Abstract:
A valve for dispensing a concentrate liquid and a diluent liquid at a desired ratio there between, comprising:a valve body having an internal cavity, a linear actuator for moving a shaft, the shaft extending through the internal cavity and the shaft having a diaphragm extending there around and the diaphragm having a perimeter fluid tightly secured with an inner wall surface of the internal cavity for dividing the internal cavity into fluidly separate upper and lower chambers, and the upper and lower chambers each having inlets for connection to sources of the concentrate and diluent respectively, and the upper and lower chambers each having outlets for providing fluid connection to a dispensing nozzle, and the linear actuator for positioning the shaft in a fully extended position so that an end of the shaft obstructs the lower chamber outlet for preventing flow of the diluent to the dispensing nozzle and for positioning the shaft to an intermediate non-obstructing retracted position for permitting flow of the diluent to the mixing nozzle, and the linear actuator for moving the shaft to a fully retracted position and for reciprocating the shaft between the intermediate and fully retracted positions whereby movement of the diaphragm provides for a pumping action for moving the concentrate to the mixing nozzle.