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 TROTTLE 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 BIASING SAID AIR VALVE TOWARD A CLOSED POSITION AGAINST FLOW OF AIR THROUGH SAID MIXTURE CONDUIT, SAID CARBURETOR BODY INCLUDING FUEL RESERVOIR AND A FUEL PASSAGE EXTENDING FROM SAID FUEL RESERVOIR TO SAID MIXTURE EXTENDING FROM AIR VALVE AND THE THROTTLE VALVE, A METERING ROD ADAPTED TO BE POSITIONED IN SAID FUEL PASSAGE FOR VARYING THE FUEL FLOW THERETO, AND MEANS OPERATIVELY CONNECTING THE METERING ROD TO SAID AIR VALVE TO VARY THE FLOW OF FUEL TO SAID MIXTURE CONDUIT RELATIVE TO THE FLOW OF AIR THROUGH SAID MIXTURE CONDUIT, SAID CONNECTING MEANS INCLUDING TEMPERATURE RESPONSIVE MEANS TO VAY THE RELATIONSHIP BETWEEN THE FLOW OF FUEL TO SAID MIXTURE CONDUIT AND THE FLOW OF AIR THROUGH SAID MIXTURE CONDUIT IN RESPONSE TO TEMPERATURE, SAID TEMPERATURE RESPONSIVE MEANS INCLUDING A STOP MEMBER HOLDING SAID AIR VALVE IN AN OPEN POSITION ABOVE A PREDETERMINED AMBIENT TEMPERATURE AND A BIMETALLIC ELEMENT BETWEEN SAID STOP AND SAID AIR VALVE TO MOVE SAID AIR VALVE TOWARD A CLOSED POSITION AS SAID TEMPERATURE DROPS BELOW SAID PREDETERMINED VALUE.