Fuel injection pumps

Claim 1

A FUEL INJECTION PUMP WHICH COMPRISES IN COMBINATION, A FRAME FORMING A CASING, A FIXED BODY IN SAID CASING, A DRIVING SHAFT JOURNALLED ABOUT AN AXIS FIXED WITH RESPECT TO SAID BODY, ONE OF THE TWO LAST MENTIONED PARTS BEING PROVIDED WITH AT LEAST ONE CYLINDRICAL HOUSING TRANSVERSE TO SAID AXIS, A PISTON SLIDABLE IN SAID HOUSING SO AS TO FORM THEREWITH A PUMPING CHAMBER, A CAM CARRIED BY THE OTHER OF SAID TWO PARTS, SAIS CAM BEING OPERATIVELY CONNECTED WITH SAID PISTON FOR IMPARTING A RECIPROCATING MOVEMENT THERETO IN SAID HOUSING IN RESPONSE TO ROTATION OF SAID SHAFT WITH RESPECT TO SAID BODY SO AS TO PRODUCE A GIVEN NUMBER OF PUMPING RECIPROCATIONS OF SAID PISTON DURING EVER REVOLUTION OF SAID SHAFT, SAID BODY BEING PROVIDED WITH A CYLINDRICAL BORE COAXIAL WITH SAID SHAFT, A DISTRIBUTING ROTARY VALVE FITTING SLIDABLY IN SAID BORE, SAID VALVE BEING OPERATIVELY CONNECTED WITH SAID SHAFT SO AS TO BE DRIVEN BY IT, A FUEL TANK, A PLURALITY OF FUEL INJECTORS, THE NUMBER OF SAID INJECTORS BEING EQUAL TO SAID GIVEN NUMBER, SAID BODY BEING PROVIDED ON THE ONE HAND WITH INTAKE CONDUITS EACH OPENING AT ONE END INTO SAID BORE AND COMMUNICATING AT THE OTHER END WITH SAID FUEL TANK AND ON THE OTHER HAND WITH DELIVERY CONDUITS EACH OPENING AT ONE END INTO SAID BORE AND COMMUNICATING AT THE OTHER END WITH ONE OF SAID FUEL INJECTORS RESPECTIVELY, SAID DISTRIBUTING VALVE BEING PROVIDED WITH DISTRIBUTING PASSAGES FOR PLACING, DURING EVERY REVOLUTION OF SAID SHAFT, SAID PUMPING CHAMBER IN COMMUNICATION WITH SAID DELIVERY CONDUITS SUCCESSIVELY AND CYCLICALLY FOR RESPECTIVE TIME INTERVALS AND WITH DISTRIBUTING PASSAGES FOR PLACING SAID PUMPING CHAMBER IN COMMUNICATION WITH SAID INTAKE CONDUITS DURING TIME INTERVALS OCCURRING BETWEEN SAID FIRST MENTIONED TIME INTERVALS, SAID DISTRIBUTING VALVE BEING FURTHER PROVIDED WITH DISCHARGE PASSAGES FOR PERIODICALLY AND CYCLICALLY SHORT-CIRCUITING THE OUTFLOW OF FUEL THROUGH SAID DELIVERY CONDUITS, A MEMBER IN SAID CASING COAXIAL WITH SAID DISTRIBUTING VALVE AND MOUNTED FOR COOPERATE THEREWITH FOR SUCCESSIVELY CLOSING AND OPENING SAID DISCHARGE PASSAGES, DURING EVERY PERIOD FOR WHICH ONE OF SAID DELIVERY CONDUITS IS IN COMMUNICATION WITH SAID PUMPING CHAMBER, SAID DISTRIBUTING VALVE AND SAID MEMBER BEING MOVABLE RELATIVELY TO EACH OTHER BOTH IN THE DIRECTION OF SAID AXIS AND BY ROTATION ABOUT SAID AXIS, SAID DISCHARGE PASSAGES BEING ARRANGED SO THAT A RELATIVE AXIAL MOVEMENT BETWEEN THE TWO ELEMENTS CONSISTING RESPECTIVELY OF SAID VALVE AND SAID MEMBER PRODUCES A VARIATION OF THE PORTION OF EVERY CYCLE OF OPERATION FOR WHICH SAID DISCHARGE PASSAGES REMAIN CLOSED, WHEREAS A RELATIVE MOVEMENT OF ROTATION BETWEEN SAID TWO ELEMENTS VARIES THE PHASE OF THE CYCLE OF OPERATION WITH RESPECT TO THE REVOLUTION OF SUCH SHAFT, A SINGLE SPEED GOVERNOR MOUNTED ON SAID SHAFT, AND MEANS INCLUDING A LOST MOTION CONNECTION IN THE AXIAL DIRECTION OPERATIVELY CONNECTING SAID GOVERNOR TO ONE OF SAID TWO ELEMENTS FOR PRODUCING IN RESPONSE TO AN INCREASE OF SPEED OF SAID SHAFT FIRST AT LOWER SPEEDS A RELATIVE ROTATION BETWEEN SAID VALVE AND SAID MEMBER TO VARY SUCH PHASE OF THE CYCLE OF OPERATION WITHOUT SUBSTANTIAL RELATIVE AXIAL DISPLACEMENT BETWEEN SAID VALVE AND SAID MEMBER AND THEN AT HIGHER SPEEDS A RELATIVE AXIAL DISPLACEMENT BETWEEN SAID VALVE AND SAID MEMBER TO VARY THE PORTION OF THE CYCLE OF OPERATION FOR WHICH THE DISCHARGE PASSAGES REMAIN CLOSED.