Proportioning fluid pump

Claim 1

IN A DIAPHRAGM PUMP HAVING A DISPLACEMENT COMPARTMTNT, AN INLET AND AN OUTLET IN COMMUNICATION WITH SAID DISPLACEMENT COMPARTMENT, FIRST AND SECOND CHECK VALVE MEANS LOCATED IN SAID INLET AND SAID OUTLET, RESPECTIVELY, A FLEXIBLE DIAPHRAGM MOVABLE BETWEEN A FIRST POSITION WHICH MAXIMIZE THE VOLUME OF SAID DISPLACEMENT COMPARTMENT AND A SECOND POSITION WHICH MINIMIZES THE VOLUME OF SAID DISPLACEMENT COMPARTIMENT, AND SPRING MEANS ADAPTED TO URGE SAID DIAPHRAGM TOWARD SAID FIRST POSITION, PUMP ACTUATING AND CONTROL MEANS COMPRISING, (A) A PRESSURE CHAMBER IN COMMUNICATION WITH SAID DIAPHRAGM AND HAVING AN INLET AND AN OUTLET (B) A UNITARY VALVE MEMBER LOCATED WITHIN SAID PRESSURE CHAMBER AND BEING MOVABLE BETWEEN A FIRST POSITION WHEREIN IT CLOSES SAID PRESSURE CHAMBER OUTLET AND SAID PRESSURE CHAMBER INLET IS OPEN AND A SECOND POSITION WHEREIN IT CLOSES SAID PRESSURE CHAMBER INLET AND SAID PRESSURE CHAMBER OUTLET IS OPEN (C) SLIDE MEANS EXTENDING FROM SAID PRESSURE CHAMBER TOWARD SAID DIAPHRAGM AND HAVING A FIRST POSITION AND A SECOND POSITION, (D) MEANS ATTACHED TO SAID DIAPHRAGM FOR ENGAGING AND SHIFTING SAID SLIDE MEANS TO ITS FIRST POSITION WHEN SAID DIAPHRAGM IS MOVED TO ITS FIRST POSITION, AND FOR ENGAGING AND SHIFTING SAID SLIDE MEANS TO ITS SECOND POSITION, (E) THE PORTION OF SAID SLIDE MEANS WHICH IS LOCATED (E) THE PORTION OF SAID SLIDE WHICH IS LOCATED WITHIN SAID PRESSURE CHAMBER BING SUBSTANTIALLY USHAPED AND HAVING A PAIR OF LEGS WHICH EXTEND ON OPPOSITE SIDES OF SAID VALVE MEMBER IN SPACED RELATION, AND (F) SNAP SPRING MEANS COMPRISING A PAIR OF COMPRESSION SPRINGS EXTENDING FROM SAID VALVE MEMBER TO EACH OF SAID SLIDE MEAN LEG, RESPECTIVELY, IN PARTIALLY COMPRESSED RELATION, SAID SPRING BEING POSITIONED SUCH THAT THEY WILL DISPLACE SAID VALVE MEMBER IN A DIRECTION OPPOSITE TO THE DIRECTION OF TRAVEL OF SAID SLIDE MEANS WHEREBY TO MOVE SAID VALVE MEMBER TO ITS FIRST POSITION WHEN SAID SLIDE MEANS IS SHIFTED TO ITS FIRST POSITION, AND TO MOVE SAID VALVE MEMBER TO ITS SECOND POSITION WHEN SAID SLIDE MEANS IS SHIFTED TO ITS SECOND POSITION.