Self-regulating reciprocating piston pumps, in particular for the injection of fuel into internal combustion engines

Claim 1

IN COMBINATION, A FIXED BODY PROVIDED WITH A HOUSING HAVING A CYLINDRICAL INNER WALL, A MEMBER HAVING A CYLINDRICAL OUTER WALL FITTING SLIDABLY AGAINST SAID INNER WALL, MEANS FOR ROTATING SAID MEMBER IN SAID HOUSING, A LIQUID DELIVERY CONDUIT, SAID MEMBER BEING PROVIDED WITH A CYLINDRICAL RECESS, A SHUTTLE PISTON FITTING SLIDABLY IN SAID CYLINDRICAL RECESS, SO AS TO DEFINE THEREWITH A VARIABLE VOLUME CHAMBER, SAID SHUTTLE PISTON BEING MOVABLE LONGITUDINALLY IN SAID CYLINDRICAL RECESS IN ONE DIRECTION IN RESPONSE TO RISES OF THE PRESSURE IN SAID CHAMBER, MEANS FOR URGING SAID SHUTTLE PISTON IN THE DIRECTION OPPOSED TO THAT ABOVE MENTIONED, THE MOVEMENTS OF SAID SHUTTLE PISTON IN THE FIRST MENTIONED DIRECTION BEING CALLED OUTWARD STROKES THEREOF AND THE MOVEMENTS OF SAID SHUTTLE PISTON IN THE SECOND MENTIONED DIRECTION BEING CALLED RETURN STROKES THEREOF, MEANS RESPONSIVE TO LONGITUDINAL RECIPROCATING MOVEMENT OF SAID SHUTTLE PISTON IN SAID CYLINDRICAL RECESS FOR FORCING INTO SAID DELIVERY CONDUIT, ON EVERY RECIPROCATION OF SAID SHUTTLE PISTON, AN AMOUNT OF LIQUID THE SMALLER AS THE AMPLITUDE OF TWO CONSECUTIVE STROKES IS SMALLER, LIQUID PUMPING MEANS FOR SUPPLYING LIQUID UNDER PRESSURE TO SAID CHAMBER, SAID PUMPING MEANS BEING CONTROLLED BY THE ROTATION OF SAID MEMBER IN SAID BODY SUCH MANNER AS TO PRODUCE PRESSURE RISES IN SAID CHAMBER DURING ONLY FIRST GIVEN PORTIONS OF EVERY ROTATION OF SAID MEMBER IN SAID BODY, LIQUID CIRCUIT MEANS IN COMMUNICA-