Carburetor

Claim 1

A CARBURETOR COMPRISING A BODY STRUCTURE HAVING AN AIR AND FUEL MIXTURE CONDUIT THERETHROUGH, (1) A THROTTLE VALVE MOUNTED ACROSS SAID MIXTURE CONDUIT FOR MOVEMENT FROM AN OPEN POSITION TO A POSITION CLOSING SAID MIXTURE CONDUIT (2) MEANS FOR OPERATING SAID THROTTLE VALVE (3) AN AIR VALVE MOUNTED WITHIN SAID MIXTURE CONDUIT ANTERIORLY OF SAID THROTTLE VALVE FOR MOVEMENT FROM AN OPEN TO A POSITION CLOSING SAI D MIXTURE CONDUIT, SAID AIR VALVE BEING ECCENTRICALLY MOUNTED FOR ROTATIONAL MOVEMENT ON A SHAFT EXTENDING ACROSS SAID MIXTURE CONDUIT (4) MEANS FOR SUPPLYING FUEL TO SAID MIXTURE CONDUIT BETWEEN SAID AIR VALVE AND SAID THROTTLE VALVE (5) A SERVO MOTOR CONNECTED TO SAID AIR VALVE TO MOVE SAID AIR VALVE IN RESPONSE TO PRESSURE SENSED WITHIN SAID MIXTURE CONDUIT (6) SAID SERVO MOTOR INCLUDING A SEALED CHAMBER HAVING ONE MOVABLE WALL CONNECTED TO SAID AIR VALVE, SPRING MEANS IN SAID CHAMBER NORMALLY MOVING SAID MOVABLE WALL IN A DIRECTION TO URGE SAID AIR VALVE TOWARD CLOSED POSITION, AN AIR PASSAGE CONNECTED AT ONE END TO SAID CHAMBER AND EXTENDING THROUGH THE WALL OF SAID CHAMBER, SAID AIR PASSAGE AT ITS OPPOSITE END INCLUDING BRANCH PASSAGES, ONE OF WHICH IS CONNECTED TO SAID FUEL MIXTURE CONDUIT ABOVE SAID THROTTLE WHEN THE LATTER IS IN CLOSED POSITION, AND THE OTHER BRANCH PASSAGE BEING CONNECTED TO THE FUEL MIXTURE CONDUIT BELOW SAID THROTTLE WHEN IN ITS CLOSED POSI-