Carburetor

Claim 1

A CARBURETOR COMPRISING A BODY HAVING AN AIR AND FUEL MIXTURE CONDUIT THERETHROUGH, A THROTTLE VALVE MOUNTED ACROSS SAID MIXTURE CONDUIT FOR MOVEMENT FROM AN OPEN POSITION TO A POSITION CLOSING SAID MIXTURE CONDUIT, MEANS FOR OPERATING SAID THROTTLE VALVE, AN AIR VALVE MOUNTED WITHIN SAID MIXTURE CONDUIT UPSTREAM OF SAID THROTTLE VALVE FOR MOVEMENT FROM AN OPEN POSITION TO A POSITION CLOSING SAID MIXTURE CONDUIT, MEANS FOR SUPPLYING FUEL TO SAID MIXTURE CONDUIT, A THERMOSTATIC COIL OPERATIVELY CONNECTED TO SAID AIR VALVE AND ADAPTED TO MOVE SAID AIR VALVE TOWARD AN OPEN POSITION UPON ENGINE WARMUP, AND AIR MOTOR OPERATIVELY CONNECTED TO SAID THERMOSTATIC COIL AND SAID AIR VALVE AND RESPONSIVE TO AIR PRESSURE DOWNSTREAM OF SAID THROTTLE VALVE TO MOVE SAID AIR VALVE IMMEDIATELY UPON ENGINE STARTING TO A PARTLY OPEN POSITION THEREBY TO VARY THE AIR AND FUEL MIXTURE, SAID CARBURETOR BODY INCLUDING A FUEL RESERVOIR AND A FUEL PASSAGE EXTENDING FROM SAID FUEL RESERVOIR TO SAID MIXTURE CONDUIT BETWEEN THE AIR VALVE AND THE THROTTLE VALVE, A METERING ROD ADAPTED TO BE POSITIONED IN SAID FUEL PASSAGE FOR VARYING THE FUEL FLOW THERETO, MEANS OPERATIVELY CONNECTING THE METERING ROD TO SAID AIR MOTOR AND DECREASING THE FLOW OF FUEL TO THE MIXTURE CONDUIT WHEN SAID AIR MOTOR MOVES THE AIR VALVE TO PARTLY OPEN POSITION UPON ENGINE STARTING, A SECOND AIR MOTOR OPERATIVELY CONNECTED TO THE AIR VALVE AND RESPONSIVE TO THE AIR PRESSURE DOWNSTREAM OF SAID AIR VALVE TO MOVE SAID AIR VALVE TOWARD AN OPEN POSITION, A SECOND METERING ROD POSITIONED IN SAID FUEL PASSAGE FOR CONTROLLING THE FLOW OF FUEL THERETO, MEANS OPERATIVELY CONNECTING SAID SECOND METERING ROD TO SAID SECOND AIR MOTOR FOR INCREASING THE FLOW OF FUEL TO SAID FUEL PASSAGE UPON A PRESSURE DROP ACROSS SAID THROTTLE VALVE, AND MEANS FORMING AN AIR PASSAGE FROM THE MIXTURE CONDUIT DOWNSTREAM OF THE AIR VALVE TO SAID SECOND AIR MOTOR TO ACTUATE SAID SECOND AIR MOTOR AND SAID SECOND METERING ROD IN RESPONSE TO A PRESSURE DROP ACROSS SAID THROTTLE VALVE.