Fluid dispenser assembly for automobiles

Claim 1

A liquid dispenser assembly for motor vehicles and the like comprising a liquid container, diaphragm pump means for supplying air pressure to said liquid container to pressurize the liquid contained therein, and a dispenser valve assembly operatively connected to said container for dispensing the liquid supplied thereto by such air pressure, said diaphragm pump means comprising a pumping chamber having suction and discharge ports, a flexible diaphragm in said pumping chamber, means for reciprocating said flexible diaphragm within said pumping chamber, and check valves for said suction and discharge ports permitting air to enter said chamber through said suction port and discharge through said discharge port during such reciprocating of said flexible diaphragm, said discharge port being operatively connected to said container for supplying air pressure thereto as aforesaid, said means for reciprocating said flexible diaphragm comprising a plunger connected to said diaphragm, a coil surrounding said plunger which when energized pulls said plunger and thus said diaphragm from a first position to a second position, spring means urging said diaphragm toward such first position, and contact means which are closed by said plunger to connect said coil with a current source when said plunger is in such first position to energize said coil, and opened when said plunger is moved toward such second position to permit said spring means to return said plunger to such first position, and so on, and pressure switch means in the current path between said contact means and said current source for opening said current path when the air pressure developed by said diaphragm pump means exceeds a predetermined level.