Carburetor

Claim 1

A CARBURETOR COMPRISING A BODY FORMED WITH AN AIR AND FUEL MIXTURE CONDUIT THERETHROUGH, A THROTTLE VALVE WITHIN SAID MIXTURE CONDUIT MOUNTED FOR MOVEMENT BETWEEN AN OPEN AND CLOSED POSITION, A CHOKE VALVE WITHIN SAID MIXTURE CONDUIT SPACED FROM SAID THROTTLE VALVE AND MOUNTED FOR MOVEMENT BETWEEN AN OPEN AND A CLOSED POSITION, A FUEL INLET, SAID BODY HAVING A FUEL SENSING CHAMBER, A FLEXIBLE DIAPHRAGM FORMING A WALL PORTION OF SAID CHAMBER, AN ELONGATED CAVITY FORMING AN EXTENSION OF SAID CHAMBER AND HAVING MEANS DEFINING A RESTRICTED FUEL INLET PASSAGE AT ONE END CONNECTION WITH SAID FUEL INLET, A VALVE MEMBER HAVING A CONICAL SHAPED WITH THE APEX OF THE VALVE MEMBER EXTENDING INTO THE RESTRICTED PASSAGE AND MOVABLY AXIALLY OF SAID CAVITY TO OPEN AND CLOSE SAID RESTRICTED PASSAGE, MEANS BIASING SAID VALVE MEMBER TOWARD CLOSED POSITION, SAID VALVE MEMBER BEING SPACED FROM THE SIDE WALLS OF SAID CAVITY TO DEFINE THEREBETWEEN A FUEL PASSAGEWAY FOR THE FLOW OF FUEL FROM SAID FUEL INLET TO SAID FUEL SENSING CHAMBER, MEANS FORMING AN OPERATIVE CONNECTION BETWEEN SAID DIAPHRAGM AND SAID VALVE MEMBER TO MOVE SAID VALVE MEMBER IN AN OPEN DIRECTION AGAINST SAID BIASING MEANS, MEANS FORMING A RESTRICTED OUTLET FUEL PASSAGE AT THE OTHER END OF SAID CAVITY BETWEEN SAID CAVITY AND SAND SENSING CHAMBER, AIR FLOW RESTRICTING MEANS WITHIN SAID MIXTURE CONDUIT INCLUDING A TUBULAR POST HAVING AN AIR PASSAGE THERETHROUGH AND ALINGED WITH THE DIRECTION OF AIR FLOW THROUGH SAID MIXTURE CONDUIT, SAID POST EXTENDING TRANSVERSELY ACROSS SAID MIXTURE CONDUIT, A MAIN FUEL NOZZLE EXTENDING INTO SAID AIR PASSAGE AND HAVING AN OUTLET IN SAID AIR PASSAGE, A MAIN FUEL PASSAGEWAY CONNECTING SAID FUEL PASSAGEWAY BETWEEN THE RESTRICTED FUEL INLET OPENING AND THE RESTRICTED FUEL OUTLET OPENING WITH SAID MAIN FUEL NOZZLE, SAID MAIN FUEL PASSAGEWAY INCLUDING AN INLET OPENING OF TAPERED FORM AND A HIGH-SPEED FUEL METERING SCREW HAVING A CONCIAL EXTREMITY WHICH EXTENDS INTO THE TAPERED INLET OPENING FOR REGULATING THE FLOW OF FUEL THERETHROUGH, A PORT OPENING INTO SAID MIXTURE CONDUIT ADJACENT TO SAID THROTTLE IN CLOSED POSITION, AND AN INDEPENDENT IDLE FUEL PASSAGE EXTENDING ONLY FROM SAID FUEL SENSING CHAMBER DIRECTLY TO SAID PORT.