Andreas Stihl Ag Co. Kg

Andreas Stihl Ag & Co.

Berthold Schell

Oliver Gerstenberger

Alexander Fuchs

Klaus-Martin Uhl

Joachim Hoffmann

Norbert Apfel

Jochen Buchholtz

Thomas Lux

Jan Föhrenbach

David Mitrega

Matthias Schulz

Jan Foehrenbach

Thomas Voigt

Bernd Hein

Ruediger Ludwig

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

A cutting assembly of a chainsaw includes a saw chain and a guide bar () for guiding the saw chain () along a peripheral edge () of the guide bar. The saw chain () has drive links () having drive bases () which with their side surfaces (') are slidingly guided between the side walls () of a guide groove () of the guide bar () with the formation of a friction pairing. Lubricant pockets () are formed in the side surface (). The lubricant pockets () are only open toward the corresponding side wall () of the guide groove () and are otherwise closed. Offside the lubricant pockets (), the side surface () has a flat sliding surface () which slides on the side wall () of the guide groove (). The lubricant pocket () has a mean diameter and a maximum depth. The ratio of the mean diameter to the maximum depth lies in a range of 5.0 up to and including 25.0.

Cutting assembly of a chainsaw and saw chain

The application relates to a chainsaw system and chain guard for a chainsaw with interchangeable cutting attachments of different lengths. The cutting attachments have cutting chains, and the chain guard includes an insertion opening for inserting a cutting attachment, at least two side walls for covering lateral surfaces of the cutting attachment, a front end opposite the insertion opening, a first latching depression formed in at least one side wall, and a second latching depression formed in at least one side wall at a distance closer toward the insertion opening with respect to the first latching depression. The first latching depression and the second latching depression each include an arcuate latching surface for latching in a form-fitting manner with a cutting chain of the cutting attachment, such that the latching is active in the direction of a longitudinal axis of the chain guard.

Chain guard and chainsaw system

Cutter chain

A cutter head assembly for a motor chain saw has a cutter head housing and a drive shaft mounted in and projecting from the cutter head housing. A drive pinion is mounted on the portion of the drive shaft projecting from the cutter head housing. A guide bar having a first end positioned adjacent to the drive pinion is provided. A saw chain is driven by the drive pinion and circulates on the guide bar. A cover covering the drive pinion and resting at least in an area of outgoing deflection of the saw chain at a housing wall of the cutter head housing defines a cuttings chamber open toward the guide bar. The first end of the guide bar is clamped between the housing wall of the cutter head housing end the cover. The cover has a cuttings ejection opening opposite the housing wall in the vicinity of the area of outgoing deflection. The cuttings ejection opening has a rim extending in a circulating direction of the saw chain and a ramp projecting from a first portion of the rim into the cutting chamber.

Cutter head with cover for drive pinion

Growing community of inventors

Backnang, Germany

Berthold Schell