Carburetor

Claim 1

A MULTISTAGE CARBURETOR COMPRISING: A BODY STRUCTURE HAVING A PRIMARY MIXTURE CONDUIT AND A SECONDARY MIXTURE CONDUIT FOR THE FLOW OF AN AIR AND FUEL MIXTURE THERETHROUGH, MEANS INCLUDING A PRIMARY NOZZLE FOR PROVIDING FUEL FLOW INTO THE SAID PRIMARY CONDUIT. A SECONDARY NOZZLE FOR PROVIDING FUEL FLOW INTO THE SAID SECONDARY CONDUIT. MANUALLY OPERABLE MEANS INCLUDING A PRIMARY THROTTLE AND A SECONDARY THROTTLE MOVABLY MOUNTED RESPECTIVELY WITHIN SAID PRIMARY AND SECONDARY CONDUITS AND DOWNSTREAM RESPECTIVELY OF SAID PRIMARY AND SECONDARY FUEL NOZZLES, AN AIR VALVE WITHIN SAID SECONDARY CONDUIT UPSTREAM OF SAID SECONDARY FUEL NOZZLE, MEANS ECCENTRICALLY MOUNTING SAID AIR VALVE FOR MOVEMENT FROM A POSITION CLOSING SAID SECONDARY CONDUIT TOWARD AN OPEN POSITION FOR AIR FLOW THROUGH SAID SECONDARY CONDUIT, BIASING MEANS OPERATIVELY CONNECTED TO SAID AIR VALVE NORMALLY BIASING SAID AIR VALVE AGAINST SAID AIR FLOW TOWARD SAID CLOSED POSITION, AND DASHPOT MEANS OPERATIVELY CONNECTED TO SAID AIR VALVE FOR RETARDING THE MOVEMENT OF SAID AIR VALVE FROM A FIRST POSITION TO A SECOND POSITION THE SAID DASHPOT ALSO HAVING MEANS FOR MODULATING THE ACTION OF SAID DASHPOT WHEREBY GREATER RESISTANCE TO MOVEMENT IS PROVIDED ONLY AT INITIAL OPENING AND FINAL CLOSING OF THE SAID AIR VALVE.