Liquid fuel pumps for use with internal combustion engines

Claim 1

A LIQUID FUEL PUMP FOR SUPPLYING FUEL TO INTERNAL COMBUSTION ENGINES AND COMPRISING A BODY PART, A ROTARY DISTRIBUTOR WITHIN THE BODY PART, A TRANSVERSE BORE FORMED WITHIN THE DISTRIBUTOR, A PAIR OF PLUNGERS MOUNTED IN THE OPPOSITE ENDS OF SAID BORE RESPECTIVELY, A CAM RING HAVING THREE PAIRS OF CAM LOBES EQUIANGULARLY DISPOSED ABOUT THE DISTRIBUTOR AND POSITIONED TO CAUSE INWARD MOVEMENT OF THE PLUNGERS DURING ROTATION OF THE DISTRIBUTOR, THE LOBES OF EACH PAIR OF CAM LOBES BEING DIAMETRICALLY DISPOSED RELATIVE TO EACH OTHER, THE LOBES BEING SHAPED TO PERMIT A LIMITED OUTWARD MOVEMENT TO THE PLUNGERS AFTER THE INWARD MOVEMENT HAS TAKEN PLACE, A DELIVERY PASSAGE IN THE DISTRIBUTOR, THREE EQUIANGULARLY SPACED DELIVERY PORTS FORMED IN THE BODY PART AND WITH WHICH THE DELIVERY PASSAGE REGISTERS IN TURN AS THE DISTRIBUTOR ROTATES DURING THE FULL INWARD MOVEMENT OF THE PLUNGERS, THE LIMITED OUTWARD MOVEMENT OF THE PLUNGERS TAKING PLACE WHILST THE DELIVERY PASSAGE IS STILL IN REGISTER WITH A DELIVERY PORT AND SERVING TO PARTIALLY RELIEVE LIQUID PRESSURE IN SAID DELIVERY PORT, A RECUPERATION CHAMBER AND MEANS FOR PLACING SAID RECUPERATION CHAMBER IN COMMUNICATION WITH THE TRANSVERSE BORE DURING THE TIME WHEN THE PLUNGERS ARE MOVED INWARDLY BY THE CAM LOBES AND WHEN THE DELIVERY PASSAGE IS NOT IN REGISTER WITH A DELIVERY PORT.