Andreas Stihl Ag Co. Kg

Jan Foehrenbach

Wolfgang Weissert

Norbert Apfel

Jochen Buchholtz

Thomas Lux

Oliver Gerstenberger

Alexander Fuchs

David Mitrega

Matthias Schulz

Berthold Schell

Simone Pelludat

Andreas Wolf

Ruediger Ludwig

Thomas Voigt

Christian Bareiss

Andreas Rieger

Bernd Hein

A telescopic drive shaft in a protective tube of a handheld work apparatus has one end connected to a rotational drive and the other end thereof to a driven tool. The drive shaft includes a rigid shaft segment and a connecting section. The rigid shaft segment has a hollow shaft end portion and an engagement length (E) of the connecting section engages therein. The engagement length (E) and the length of the hollow shaft end portion mutually overlap to form a joining section. The hollow shaft end portion is deformed for connecting the connecting section to the rigid shaft segment. The material of the hollow shaft end portion is compressed over its entire periphery and deformed so that the material of the hollow shaft end portion is radially displaced and is pressed in a rotative manner onto the engagement length (E) to produce a balanced, loadable connection.

Drive shaft in a handheld work apparatus

A guide bar for a saw chain includes an elongate, flat base body made of a basic material. The base body extends along a longitudinal center axis and, in order to guide a saw chain, has a running surface formed on an outer periphery thereof and a guide groove formed in the outer periphery of the base body. The guide groove has a groove base. A direction-reversing section for the saw chain is provided at one end of the base body. The direction-reversing section includes at least one add-on component having a running surface made of more wear-resistant material than the basic material of the base body. The add-on component is secured to the base body of the guide bar by at least one weld seam. The weld seam extends between the add-on component and the base body and is located spatially beneath the groove base.

Guide bar for a saw chain having a reduced-wear direction-reversing section

Growing community of inventors

Fellbach, Germany

Jan Foehrenbach