Patent ID: 7287743

Claim:
A carburetor for use with an internal combustion engine comprising: a fuel and air mixing passage having an inlet and an outlet through which a fuel and air mixture is delivered to the engine; a fuel circuit that communicates a supply of fuel with the fuel and air mixing passage; a choke valve having a valve head disposed at least partially in the fuel and air mixing passage in the area of the inlet and movable between an open position and a closed position to restrict air flow through the fuel and air mixing passage; and an air bleed passage having an inlet in communication with the fuel and air mixing passage, an outlet in communication with a portion of the fuel circuit upstream of the fuel and air mixing passage to provide in operation air to said portion of the fuel circuit when the choke valve is in its open position, and the inlet is at least partially closed by the valve head when the choke valve is in its closed position in operation to at least substantially restrict air flow into the inlet and through the air bleed passage when the choke valve is closed.