Patent ID: 6481403
Filing Date: 2002-11-19
Classification: F02M,Y10S

Abstract:
A carburetor for an internal combustion engine comprising:a body having a fuel and air mixing passage extending therethrough; a throttle valve in the fuel and air mixing passage movable between idle and wide open positions to control at least in part the flow of air through the fuel and air mixing passage; a choke valve shaft carried by the body; a choke valve head in the fuel and air mixing passage upstream of the throttle valve, carried by the choke valve shaft and movable between open and closed positions; a cam carried by the choke valve shaft; a primer fuel passage adapted to receive a supply of fuel and being communicated with the fuel and air mixing passage; a primer valve carried by the body in communication with the primer fuel passage and having a valve seat and a valve head yieldably biased to a closed position on the valve seat to prevent fluid flow through the primer valve and movable by the cam to an open position spaced from the valve seat in response to movement of the choke valve from its open position to its closed position to permit fluid flow through the primer valve and to provide a quantity of fuel from the primer fuel passage into the fuel and air mixing passage to facilitate starting an engine with which the carburetor is used; and at least one detent carried by the choke valve shaft and configured to permit the primer valve head to be in its closed position when the choke valve is in its open position.