Injection pump adjusting structure

Claim 1

IN AN INJECTION PUMP, IN COMBINATION, PISTON-ANDCYLINDER MEANS INCLUDING A PISTON MEMBER AND A CYLINDER MEMBER SLIDABLY ENGAGING EACH OTHER WITH SAID PISTON OPERATIVELY CONNECTED TO SAID PISTON-AND-CYLINDER MEANS FOR AXIALLY RECIPROCATING ONE OF SAID MEMBERS THEREOF RELATIVE TO THE OTHER FOR EFFECTING PRESSURE AND SUCTION STROKES DURING WHICH FUEL IS RESPECTIVELY DISCHARGED FROM AND SUCKED INTO SAID CYLINDER MEMBER, SAID CAM MEANS INCLUDING A CAMMING PORTION AND A FOLLOWER PORTION ONE OF WHICH IS ROTATED IN A GIVEN DIRECTION WITH RESPECT TO AND RIDES ON THE OTHER FOR EFFECTING SAID STROKES, SAID OTHER PORTION OF SAID CAM MEANS INCLUDING A RING; MOUNTING MEANS MOUNTING SAID RING FOR FREE ANGULAR MOVEMENT SO AS TO ADJUST THE ANGULAR POSITION OF SAID OTHER PORTION OF SAID CAM MEANS RELATIVE TO SAID ONE ROTATED PORTION THEREOF IN ORDER TO REGULATE THE TIMING OF SAID STROKES; AN ELONGATED HOLLOW HOUSING CONNECTED TO SAID MOUNTING MEANS AND HAVING ITS INTERIOR IN COMMUNICATION WITH SAID RING; AN ADJUSTING PIN FIXED TO SAID RING AND EXTENDING INTO SAID HOUSING SO THAT MOVEMENT OF SAID PIN IN SAID HOUSING WILL ADJUST THE ANGULAR POSITION OF SAID RING; AN OUTER HOLLOW PISTON SLIDABLE IN SAID HOUSING AND AN INNER PISTON OPERATIVELY CONNECTED TO SAID PIN AND SLIDABLE WITHIN SAID OUTER PISTON, SAID HOUSING COMMUNICATING WITH A FUEL SUPPLY PUMP WHICH IS DRIVEN BY THE ENGINE TO WHICH FUEL IS DELIVERED BY THE INJECTION PUMP FOR DIRECTING SOME OF THE FUEL PUMPED BY THE FUEL SUPPLY PUMP AGAINST AN END FACE OF SAID OUTER PISTON FOR URGING THE LATTER FROM ONE END POSITION IN SAID HOUSING ALONG THE INTERIOR THEREOF TO AN OPPOSITE END POSITION; FIRST SPRING MEANS LOCATED IN SAID HOUSING AND URGING SAID OUTER PISTON FROM SAID OPPOSITE END POSITION TO SAID ONE END POSITION IN OPPOSITION TO THE FUEL PRESSURE SO THAT IN ITS REST POSITION SAID OUTER PISTON IS IN SAID ONE END POSITION THEREOF; PASSAGE MEANS PROVIDING COMMUNICATION BETWEEN THE FUEL DELIVERED BY THE FUEL SUPPLY PUMP TO SAID HOUSING AND AN END FACE OF SAID INNER PISTON FOR URGING THE LATTER IN THE SAME DIRECTION IN WHICH SAID OUTER PISTON IS URGED BY SAID FIRST SPRING MEANS, SAID INNER PISTON WHEN MOVING IN SAID LATTER DIRECTION ACTING THROUGH SAID PIN ON SAID RING FOR TURNING THE LATTER IN THE SAME DIRECTION THAT SAID ONE PORTION OF SAID CAM MEANS IS ROTATED SO AS TO RETARD THE TIMING OF SAID STROKES, SAID INNER PISTON BEING SHIFTABLE IN SAID OUTER PISTON IN SAID DIRECTION OF MOVEMENT TOWARD SAID ONE END POSITION OF SAID OUTER PISTON UNTIL SUCH INNER PISTON REACHES A GIVEN END POSITION; AND SECOND SPRING MEANS WEAKER THAN SAID FIRST SPRING MEANS AND OPPOSING MOVEMENT OF SAID INNER PISTON TOWARD SAID GIVEN END POSITION THEREOF, WHEREBY DURING THE INITIAL STARTING-UP PERIOD OF THE ENGINE SAID INNER PISTON WILL MOVE TO SAID GIVEN END POSITION THEREOF WHILE SAID OUTER PISTON REMAINS STATIONARY SO THAT THE TIMING OF SAID STROKES WILL BE RETARDED AND WHEN THE FUEL PRESSURE INCREASES BEYOND THE PRESSURE REQUIRED TO LOCATE SAID INNER PISTON AT SAID GIVEN END POSITION THEREOF SAID OUTER PISTON WILL BE MOVED IN OPPOSITION TO SAID FIRST SPRING MEANS FOR ADVANCING THE TIMING OF SAID STROKES.