Andreas Stihl Ag Co. Kg

Braun Gmbh

Ricardo Hojczyk

Ulrich Kapinsky

Eberhard Bohnaker

Andreas Moehring

Martin Rieber

Mark Reichler

Renata Burghardt

Jörg Amann

Tobias Bernhard

Robert Feulner

Harald Buehner

Harald Bühner

Dietmar Korn

A handheld work apparatus has a fuel supply system and a pump for delivering fuel from the fuel supply system. The pump has an elastic pump bellows which can be actuated by the operator. The pump bellows has a fastening section at which the pump bellows is fastened to a housing. The pump bellows has a main section and a roof section, wherein the roof section has a dome-shaped section adjoining the main section and a cap which adjoins the dome-shaped section and closes off the dome-shaped section. In order to achieve a rapid return of the pump bellows from the actuated position into the unactuated position, even at low temperatures, it is provided that the smallest wall thickness (g) of the main section is at least 10% greater than the smallest wall thickness (h) of the dome-shaped section.

Handheld work apparatus having a pump, said pump and pump bulb therefor

An internal combustion engine has a cylinder () and a crankcase (). A combustion chamber () is formed in the cylinder () and is delimited by a piston (). The piston () rotationally drives a crankshaft () in a rotational direction () via a connecting rod (). The crankshaft () is arranged in a crankcase interior space (). A mixture inlet () is provided in the crankcase interior space (). In the crankcase interior space (), at least one flow conducting element () is provided which is spatially fixed and this flow conducting element projects into the crankcase interior space () and lies opposite to the rotational direction () of the crankshaft ().

Internal combustion engine

Growing community of inventors

Waiblingen, Germany

Ricardo Hojczyk