Tensioning arrangement for a saw chain of a motor-driven chain saw

US5522143A · kind A · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Harald Schliemann · Waiblingen, DE
• Werner Geyer · Newton, US
• Helmut Zimmermann · Winnenden, DE
• Rudolf Krebs · Wendeburg, DE
• Hans Nickel · Cottenweiler, DE

Key dates

• Filing date: Nov 14, 1994
• Grant date: Jun 4, 1996
• Expiry date: Nov 14, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B27B17/14
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a tensioning arrangement for saw chains of motor-driven chain saws which include a device for longitudinally displacing the guide bar. The clamped guide bar is released so that the adjusting arrangement can be actuated for the longitudinal displacement of the guide bar. By rotating a disc having a spiral slot, a slide piece, which is coupled to the guide bar, is displaced in the longitudinal direction. Assembly is simplified and handling facilitated when the tension in the saw chain is adjusted. This is achieved by making the slide piece on the spiral disc so that it is not released therefrom but instead is held so as to be rotationally and longitudinally displaceable. The slide piece is fixedly connected to the guide bar by using appropriate attachment devices.