Self regulating reciprocating pumps in particular for the injection of fuel into engines

Claim 1

A SELF REGULATING RECIPROCATING LIQUID PUMP WHICH COMPRISES, IN COMBINATION, A MAIN PUMP INCLUDING A MAIN CYLINDER AND A MAIN PISTON MOUNTED RECIPROCATING IN SAID CYLINDER TO FORM THEREWITH A VARIABLE VOLUME MAIN WORKING CHAMBER, AT LEAST ONE LIQUID DELIVERY CONDUIT STARTING FROM SAID CYLINDER WORKING CHAMBER, A FIRST BY-PASS CONDUIT STARTING FROM SAID CYLINDER WORKING CHAMBER AND HAVING AN OUTLET OPENING TO THE OUTSIDE, A REGULATING VALVE MEMBER MOUNTED TO COOPERATE WITH SAID OUTLET TO CONTROL THE OPENING THEREOF, A HOUSING SURROUNDING A PORTION OF SAID REGULATING MEMBER WHICH IS SLIDABLE THEREIN IN PISTON-LIKE FASHION, SAID HOUSING AND SAID REGULATING MEMBER PORTION FORMING TOGETHER A VARIABLE VOLUME SPACE, SAID REGULATING MEMBER BEING ARRANGED TO OPEN SAID BY-PASS CONDUIT OUTLET WHEN SAID MEMBER REACHES A GIVEN POSITION WITH RESPECT TO SAID HOUSING ON EVERY DISPLACEMENT THEREOF IN THE DIRECTION FOR WHICH THE VOLUME OF SAID VARIABLE VOLUME SPACE IS INCREASING, AN AUXILIARY RECIPROCATING PUMP OPERATIVELY CONNECTED WITH SAID MAIN PUMP TO WORK IN SYNCHRONISM THEREWITH, SAID AUXILIARY PUMP INCLUDING AN AUXILIARY CYLINDER AND AN AUXILIARY PISTON MOUNTED RECIPROCATING IN SAID AUXILIARY CYLINDER TO FORM THEREWITH A VARIABLE VOLUME AUXILIARY WORKING CHAMBER, THE DISPLACEMENTS OF SAID AUXILIARY PISTON WITH RESPECT TO SAID AUXILIARY CYLINDER IN THE DIRECTION FOR WHICH THE VOLUME OF SAID AUXILIARY WORKING CHAMBER IS REDUCED BEING CALLED DELIVERY STROKES OF SAID AUXILIARY PISTON, MEANS BETWEEN SAID AUXILIARY WORKING CHAMBER AND SAID VARIABLE VOLUME SPACE FOR CONNECTING THEM TOGETHER DURING AT LEAST A PORTION OF EVERY DELIVERY STROKE OF SAID AUXILIARY PISTON, WHEREBY THE VOLUME OF SAID VARIABLE VOLUME SPACE IS THEN MADE TO INCREASE, RESILIENT MEANS CONNECTED WITH SAID REGULATING MEMBER FOR URGING IT IN THE DIRECTION FOR WHICH SAID