Inventors:
Robert G. Thompson - Milwaukee WI
Heinz K. Gund - Brookfield WI
Assignee:
Briggs & Stratton Corporation - Wauwatosa WI
International Classification:
F02B 3300
Abstract:
The choke valve of a small engine, biased towards a closed position, is link connected with an air vane that tends to open it under force of cooling air blown across the engine. The air vane has a lost motion connection with a control shaft that is rotatable between defined hot and cold positions. Shaft position is established by two spirally coiled bi-metal thermostats, one for high temperatures, one for low temperatures, each in a unidirectional torque transmitting connection between the shaft and fixed structure whereby each thermostat imposes force upon the shaft only at temperatures within its own range.