Variable delivery piston pump

Claim 1

A VARIABLE DELIVERY RECIPROCATING PUMP COMPRISING A HOLLOW ELONGATED HOUSING OPEN AT OPPOSITE ENDS AND HAVING A COMPARTMENT THEREIN OPENING AT ONE END, A PLURALITY OF OPEN-ENDED PUMP CYLINDERS IN SAID HOUSING DISPOSED IN CIRCUMFERENTIALLY SPACED SIDE-BY-SIDE RELATION ABOUT THE CENTRAL AXIS OF SAID HOUSING, SAID COMPARTMENT COMPRISING A CRANKCASE INTO WHICH ONE END OF EACH CYLINDER COMMUNICATES, THE OTHER END OF EACH CYLINDER OPENING AT THE OTHER END OF SAID HOUSING, CLOSURE PLATES FOR SAID HOUSING OPPOSITE ENDS COMPRISING A CYLINDER HED COVER AND A CRANKCASE COVER, A DRIVE SHAFT JOURNALED ENTIRELY IN SAID CRANKCASE COVER AND EXTENDING INTO SAID COMPARTMENT, PISTONS EACH RECIPROCABLE IN ONE OF SAID CYLINDERS AND OPERATIVELY CONNECTED TO SAID DRIVE SHAFT IN SAID COMPARTMENT, A CYLINDER HEAD DISPOSED IN AND CLOSING SAID OTHER END OF EACH CYLINDER AND FORMING THEREWITH A PUMP CHAMBER, MEANS SUPPLYING A FLUID INTO SAID PUMP CHAMBERS, FLUID OUTLET MEANS RECEIVING FLUID UNDER PRESSURE FROM SAID PUMP CHAMBERS, FLUID REJECTING MEANS COMMUNICATING WITH EACH PUMP CHAMBER AND RECEIVING FLUID THEREFROM WHEREBY TO CONTROL THE PROPORTION OF THE DELIVERY OF FLUID FROM SAID PUMP CHAMBERS TO SAID FLUID OUTLET MEANS, AND MEANS ASSOCIATED WITH SAID FLUID REJECTION MEANS AND REGULATING THE DELIVERY OF FLUID FROM SAID PUMP CHAMBERS TO SAID FLUID REJECTION MEANS AND THEREBY ADJUSTABLY CONTROLLING THE DELIVERY OF SAID PUMP CHAMBERS, SAID FLUID SUPPLYING MEANS AND SAID FLUID REJECTING MEANS EACH COMMUNICATING WITH SAID CRANKCASE, A SUPPLY PASSAGE EXTENDING THROUGH EACH PISTON AND CONNECTING THE CRANKCASE WITH THE ASSOCIATED PUMP CHAMBER.