Fuel-injection pumps for internal combustion engines

Claim 1

IN A FUEL INJECTION PUMP FOR AN INTERNAL COMBUSTION ENGINE IN THE FORM OF A SINGLE UNIT CAPABLE OF PERFORMING TWO INJECTIONS PER CYCLE VIA TWO SEPARATE INJECTION NOZZLES SITUATED IN EACH ENGINE CYLINDER THE COMBINATION COMPRISING A CASING HAVING A LIQUID-FUEL INLET PORT AND TWO OUTLET PORTS FOR EACH CYLINDER, A PORTED VALVE MOUNTED WITHIN THE CASING FOR ROTARY MOTION AND FORMED WITH SEATING FACES ON OPPOSITE SIDES THEREOF, A METERING BLOCK INCLUDING A PLURALITY OF DISCHARGE PORTS MOUNTED FOR MOVEMENT WITHIN THE CASING AND HAVING ONE SURFACE ADJACENT TO ONE SEATING FACE OF SAID VALVE AND SHAPED COMPLEMENTARY THERETO, SAID VALVE BEING DISPOSED BETWEEN SAID BLOCK AND ONE END OF THE CASING WITH ITS OTHER SEATING FACE IN CONTACT WITH SAID END OF THE CASING, RESILIENT MEANS DISPOSED WITHIN SAID CASING FOR URGING SAID METERING BLOCK TOWARD SAID ONE END OF THE CASING TO MAINTAIN INTIMATE CONTACT BETWEEN THE CASING, THE VALVE, AND SAID METERING BLOCK, PLURAL METERING CHAMBERS IN SAID CASING HAVING ONE END OPENING ADJACENT TO THE SEATING FACE OF SAID VALVE, RECIPROCABLE FREE PISTONS IN THE CHAMBERS, MEANS FOR IMPARTING MOTION TO SAID VALVE, THE VALVE BEING ADAPTED TO CONNECT TWO OF THE METERING CHAMBERS ALTERNATELY TO SAID LIQUID FUEL INLET PORT AND TWO OUTLET PORTS ASSOCIATED WITH A RESPECTIVE ENGINE CYLINDER, AND MEANS FOR CAUSING THE FREE PISTONS TO RECIPROCATE WHEREBY A METERED QUANTITY OF LIQUID IS ALTERNATELY RECEIVED IN SAID METERING CHAMBERS AND EXPELLED THROUGH THE DISCHARGE PORTS INTO SAID ENGINE CYLINDERS.