Carburetors for internal combustion engines

Claim 1

FOR USE TO FEED A FUEL AND AIR MIXTURE TO AN INTERNAL COMBUSTION ENGINE HAVING AN INLET VALVE, A CARBURETOR WHICH COMPRISES, IN COMBINATION, AN INDUCTION PIPE LEADING TO SAID INLET VALVE, A MAIN THROTTLE VALVE IS SAID INDUCTION PIPE, AN AUXILIARY THROTTLE VALVE IN SAID INDUCTION PIPE UPSTREAM OF SAID MAIN THROTTLE VALVE, SAID AUXILIARY THROTTLE VALVE BEING ARRANGED TO OPEN AUTOMATICALLY MORE AND MORE AS THE AIR FLOW RATE THROUGH SAID INDUCTION PIPE INCREASES, THE PORTION OF SAID INDUCTION PIPE BETWEEN SAID TWO THROTTLE VALVES FORMING A LOOP OF A LENGTH SUCH THAT THE DISTANCE FROM SAID AUXILIARY VALVE TO SAID INLET VALVE CORRESPONDS TO THE PRODUCTION OF A RAM EFFECT IN SAID INDUCTION PIPE CAPABLE OF IMPROVING THE FILLING OF THE ENGINE, A FUEL FEED CONDUIT THE DOWNSTREAM END OF WHICH OPENS INTO SAID INDUCTION PIPE, TWO COOPERATING MEANS, THE FIRST ONE FIXED WITH RESPECT TO SAID INDUCTION PIPE AND THE SECOND ONE SLIDABLE IN THE FIRST ONE, FORMING TOGETHER A METERING DEVICE CONTROLLING THE SIZE OF THE CROSS SECTION OF SAID FUEL FEED CONDUIT AT A POINT THEREOF CLOSE TO THE DOWNSTREAM BRANCH OF SAID INDUCTION PIPE LOOP PORITION, THE BRANCHES OF SAID INDUCTION PIPE LOOP PORTION ADJOINING SAID AUXILIARY THROTTLE VALVE AND SAID METERING ORIFICE, RESPECTIVELY, BEING IN CLOSE PROXIMITY TO EACH OTHER, A ROD, RIGID WITH SAID METERING DEVICE SLIDABLE MEANS, MOUNTED SLIDABLE WITH A FLUIDTIGHT FIT IN BOTH OF SAID BRANCES OF SAID INDUCTION PIPE LOOP PORTION, SAID ROD HAVING ONE END THEREOF RIGID WITH SAID METERING DEVICE SLIDABLE MEANS, AND MEANS FOR DIRECTLY CONNECTING THE OTHER END OF SAID ROD WITH SAID AUXILIARY THROTTLE VALVE.