Liquid fuel pumps for internal combustion engines

Claim 1

FOR USE WITH A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE PROVIDED WITH A PLURALITY OF FUEL INJECTION NOZZLES IN COMMUNICATION RESPECTIVELY WITH THE CYLINDERS OF THE ENGINE, A LIQUID FUEL INJECTION PUMP COMPRISING IN COMBINATION A HOLLOW BODY PART, A CYLINDRICAL DISTRIBUTOR MOUNTED IN A COMPLEMENTARY PORTION OF SAID HOLLOW BODY PART, AND ADAPTED TO BE ROTATED BY THE ENGINE, A HEAD WHICH IS RIGIDLY UNITED WITH ONE END OF SAID DISTRIBUTOR SO AS TO BE ROTATABLE THEREWITH, AND WHICH IS PROVIDED WITH A TRANSVERSE BORE, AT LEAST ONE PLUNGER SLIDABLY MOUNTED IN SAID TRANSVERSE BORE, AN ANNULAR CAM SURROUNDING SAID HEAD FOR IMPARTING RADIALLY INWARD MOVEMENTS TO SAID PLUNGER DURING ROTATION OF SAID HEAD, A FIRST SERIES OF ANGULARLY SPACED RADIAL PASSAGES FORMED IN SAID DISTRIBUTOR, AN AXIAL PASSAGE WHICH IS FORMED IN SAID DISTRIBUTOR, AND WHICH ESTABLISHES COMMUNICATION BETWEEN SAID FIRST SERIES OF RADIAL PASSAGES AND THE TRANSVERSE BORE IN SAID HEAD, A SECOND SERIES OF ANGULARLY SPACED RADIAL PASSAGES FORMED IN SAID DISTRIBUTOR, A RADIAL DISCHARGE PASSAGE FORMED IN SAID DISTRIBUTOR, ANOTHER PASSAGE WHICH IS FORMED LONGITUDINALLY IN SAID DISTRIBUTOR, AND THROUGH WHICH SAID SECOND SERIES OF RADIAL PASSAGES ARE COMMUNICATABLE WITH SAID RADIAL DISCHARGE PASSAGE, A PLURALITY OF ANGULARLY SPACED DISCHARGE PORTS FORMED IN SAID HOLLOW BODY PART AT POSITIONS IN WHICH SAID DISCHARGE PASSAGE REGISTERS IN TURN WITH SAID DISCHARGE PORTS DURING ROTATION OF SAID DISTRIBUTOR, SAID DISCHARGE PORTS BEING ADAPTED FOR CONNECTION RESPECTIVELY TO THE FUEL INJECTION NOZZLES OF THE ENGINE, A CYLINDRICAL CHAMBER WHICH AT ONE END COMMUNICATES WITH SAID FIRST SERIES OF ANGULARLY SPACED RADIAL PASSAGES, AND AT THE OTHER END COMMUNICATES WITH SAID SECOND SERIES OF ANGULARLY SPACED RADIAL PASSAGES, A PAIR OF FUEL INLET PORTS IN SAID HOLLOW BODY PART AT POSITIONS IN WHICH, DURING ROTATION OF SAID DISTRIBUTOR, ONE OF SAID FUEL INLET PORTS REGISTERS IN TURN WITH SAID FIRST SERIES OF ANGULARLY SPACED RADIAL PASSAGES, AND THE OTHER OF SAID FUEL INLET PORTS REGISTERS IN TURN WITH SAID SECOND SERIES OF ANGULARLY SPACED RADIAL PASSAGES, MEANS FOR FEEDING FUEL TO SAID PAIR OF FUEL INLET PORTS, SPILL PASSAGE IN THE WALL OF SAID CYLINDRICAL CHAMBER, AN AXIALLY MOVABLE SHUTTLE IN SAID CYLINDRICAL CHAMBER, MEANS FOR ADJUSTING SAID SHUTTLE ANGULARLY ABOUT ITS AXIS, MEANS FOR LIMITING AXIAL MOVEMENT OF SAID SHUTTLE TOWARDS THE END OF SAID CYLINDRICAL CHAMBER IN COMMUNICATION WITH SAID FIRST SERIES OF ANGULARLY SPACED RADIAL PASSAGES, AND MEANS FOR ADJUSTING SAID SHUTTLE AXIALLY, SAID SHUTTLE HAVING IN AT LEAST ONE END THEREOF A SLOT SHAPED SO THAT ANGULAR ADJUSTMENT OF SAID SHUTTLE WILL DETERMINE AT WHAT AXIAL POSITION SAID SHUTTLE WILL UNCOVER SAID SPILL PASSAGE, AND THE ARRANGEMENT BEING SUCH THAT FUEL FED TO SAID SECOND SERIES OF ANGULARLY SPACED RADIAL PASSAGES WILL BE DELIVERED THROUGH SAID DISCHARGE PASSAGE TO SAID DISCHARGE PORTS IN TURN BY DISPLACEMENT OF SAID SHUTTLE IN RESPONSE TO FUEL FED BY INWARD MOVEMENTS OF SAID PLUNGER TO THE FIRST MENTIONED END OF SAID CYLINDRICAL CHAMBER.