Andreas Stihl Ag & Co.

Peter St&uuml;cke

Hans Nickel

Werner Geyer

Harald Schliemann

Helmut Zimmermann

Bernhard D&uuml;rr

Axel Klimmek

J&ouml;rg Schlossarczyk

Gunter Stein

A hand-held working tool has a housing and an internal combustion engine arranged in the housing and comprising a crankshaft and an air filter. A tool is driven by the crankshaft of the internal combustion engine. A fan housing is attached to the engine housing and has an air inlet. A fan wheel is arranged in the fan housing and is driven by the crankshaft of the internal combustion engine to supply cooling air, sucked in through the air inlet, to the internal combustion engine. The fan housing has a bottom extending radially to the crankshaft. The bottom and a side of the fan wheel facing the bottom define a chamber in the fan housing. The bottom has a combustion air outlet. A combustion air channel is connected to the combustion air outlet and to the air filter. The combustion air outlet is axially supplying combustion air from the chamber through the combustion air channel into the air filter of internal combustion engine. The fan housing has a channel wall having a bottom portion connected to the face of the bottom remote from the fan wheel and covering the bottom partially to form a double-walled bottom. The end face portion of the combustion air channel is defined by the bottom and the bottom portion of the channel wall. In an alternative embodiment the combustion air channel is provided in a hollow beam of a support that supports the drive unit of the working tool.

Hand-held working tool

Growing community of inventors

Virginia Beach, VA, United States of America

Peter Stücke

Growing community of inventors

Virginia Beach, VA, United States of America

Peter St&uuml;cke

Peter Stücke