Tillotson, Ltd.

Gary L Baumbarger

William A Scott

Mark A Hutchinson

John G Easter

A starting system for an internal combustion engine is provided for enhancing engine startability and performance by simultaneously controlling the volume of air flowing through a carburetor and the ratio of an air/fuel mixture through a single manual operation. The starting system is constructed to utilize atmospheric air control feed back to a carburetor and includes a piston disposed with a chamber which accesses two atmospheric ports. When the piston is positioned to fully close a first of the ports, a second of the ports is fully open. Similarly, when the piston fully opens the second port, the first port is fully closed. The two atmospheric ports access the carburetor idle system and intake manifold of the engine respectively. For starting of the engine in cold temperatures, the starting system also includes a fuel prime arrangement for enriching the ratio of air/fuel delivered to the engine. The fuel prime arrangement includes a primer pawl interconnected to the piston which depresses a prime bulb upon selective movement of the piston.

Starting system for an internal combustion engine

A fuel supply system for supplying fuel from a fuel source to an internal combustion engine includes a valve assembly having a shut-off valve automatically responsive to negative pressures transmitted from an engine. The shutoff valve is diaphragm responsive and moves in the same direction as the flow of fuel in order close the valve assembly, thereby retaining the content of a fuel receptacle infinitely. The shutoff valve is adapted to withstand pressures which may develop in a fuel receptacle without opening.

Automatic shutoff valve

A fuel supply system for supplying fuel from a fuel source to an internal combustion engine includes a valve assembly having a shut-off valve automatically responsive to negative pressures transmitted from engine aspiration or a fuel pump. The shutoff valve is diaphragm responsive and moves in the same direction as the flow of fuel in order close the valve assembly, thereby retaining the content of a fuel receptacle infinitely. The shutoff valve is adapted to withstand pressures which may develop in a fuel receptacle without opening. In one embodiment, the fuel supply system includes a vapor line for directing fuel vapor from the fuel receptacle to a portion of the engine, where it can be combusted. The vapor line is operatively associated with a fuel cap. The fuel cap can be selectively rotated positioned so as to permit fuel vapor to enter the vapor line.

Fuel tank vapor recovery control

An automatic choke assembly or starting aid is coupled with a small internal combustion engine. The choke assembly is responsive to a pressure differential in the internal combustion engine which causes movement of a mechanism to control the amount of combustion air entering into the internal combustion engine. The mechanism provides sufficient combustion air during start-up and during continuous running condition of the internal combustion engine.

Automatic choke and starting aid for small two-cycle internal combustion

An automatic choke assembly or starting aid is coupled with small internal combustion engines. The choke assembly is responsive to pressure differentials in the internal combustion engine which causes movement of a mechanism to control the amount of combustion air entering into the internal combustion engine. The mechanism provides sufficient combustion air during start-up and during continuous operation of the internal combustion engine.

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Decatur, IL, United States of America

Gary L Baumbarger