Andreas Stihl Ag & Co.

Andreas Stihl

Andreas Stihl Ag Co. Kg

Bernd Andress

Roland Schierling

David Mitrega

Johannes Menzel

Norbert Apfel

Jochen Buchholtz

Kai-Ulrich Machens

Walter Sattelmaier

Klaus Wieninger

Martin Baum

Heinz Escher

A cover arrangement of a hand-held power tool has a cover having at least one fastening element for connecting the cover to an additional component of the power tool. The cover has a wall component having a shape-elastic yielding support forming a monolithic part of the cover. The at least one fastening element is arranged on the support.

Cover arrangement for a hand-held power tool

The invention is directed to a saw chain for a motor-driven chain saw comprising center drive links and lateral connecting links which are pivotally connected to each other via rivets lying transversely to the longitudinal direction of the chain. Individual connecting links are configured as cutting links and have a cutting tooth with a roof bent over toward the chain center. The roof has a leading edge and a trailing edge which lie each transverse to the longitudinal direction of the chain. The leading edge is configured as a roof cutting edge and lies higher than the trailing edge which lies at a spacing above a depression. The depression is formed in the region between the rivet holes in the adjacent upper edge of the drive link and delimits a chip channel. The recess is formed asymmetrically on a drive link with respect to the center perpendicular of an imaginary connecting line between the center points of the rivet holes. In this way, a blockage-free removal of chips is ensured and a high cutting power is provided.

Saw chain for a motor-driven chain saw

The invention relates to a method for assembling a guide bar having a guide groove for a saw chain of a motor-driven chain saw. The guide groove extends along the periphery of the guide bar. The guide bar includes two parallel mutually adjacent side parts and individual spacers arranged between the side parts. The spacers hold the side parts at a spacing corresponding to the groove width. The side parts as well as the spacers are inseparably joined to each other at individual attachment points. A spacer is arranged at each attachment point. The spacers are fixed to a common carrier to obtain a light guide bar accurate with respect to size. The carrier is removed after the side parts are joined.

Method of assembling a guide bar

A guide bar for a saw chain of a motor chain saw has a single member steel plate having a center plane and a circumferential guide groove for guiding a saw chain extending in the center plane. The steel plate has a longitudinal extension and a height perpendicular to the longitudinal extension. The steel plate has a cutout extending over a portion of the longitudinal extension and over a portion of the height. A filling member, consisting of a casting material having a smaller density than the steel plate, is cast into the cutout. The cutout has a circumferential edge facing the filling member. The circumferential edge has undercuts uniformly distributed along the circumferential edge. The filling member has a shrinkage rate of at least 0.5% for engaging positive-lockingly the undercuts upon solidification of the casting material to thereby create a uniformly distributed pretension within the center plane of the guide bar in the unloaded state of the guide bar.

Guide bar for a motor chain saw

The invention is directed to a bearing arrangement for a drive shaft connecting a work tool to a drive unit. A protective tube has an inner wall surface and is part of this bearing arrangement. A bearing structure is mounted in the protective tube and has a bearing sleeve for accommodating the drive shaft therein. A plurality of longitudinally running supporting ribs extend from the bearing sleeve to act on the inner wall surface to hold the bearing sleeve approximately centered in the protective tube. Each of the supporting ribs includes a radial leg extending approximately radially from the bearing sleeve and a peripheral leg extending axially of the radial leg and approximately in the peripheral direction of the inner wall surface. The radial leg has an outer radial end portion facing toward the inner wall surface so as to leave a gap therebetween. The peripheral leg extends from the radial leg at the outer radial end portion and is supported on the inner wall surface. The peripheral leg is joined to the radial leg at an angle of less than 90.degree..

Bearing arrangement for a drive shaft

The invention is directed to a guide bar for guiding the saw chain of a motor-driven chain saw. The guide bar of the invention has a lamellar configuration and is not made of three parts as are conventional guide bars. Instead, the guide bar of the invention is made of two side parts. The two side parts are connected by means of spacers which are configured as projections on at least one of the two side parts. The side parts can be frames having large inner openings and are preferably stiffened. The connected frames define a composite frame which can be filled with plastic. The spacers determine the spacing of the side parts and therefore the width of the guide groove for the saw chain. The invention is also directed to a method of making the guide bar.

Growing community of inventors

Erdmannhausen, Germany

Bernd Andress