Guide bar having a carbon fiber reinforced plastic insert

US9272438B2 · kind B2 · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Helmar Amend · Waiblingen, DE
• Christoph von Hiller · Stuttgart, DE
• Alexander Fuchs · Tuttlingen, DE
• Christine Rominger · Stuttgart, DE
• Matthias Schulz · Westerstetten, DE
• Jonas Lank · Winnenden, DE
• Klaus-Martin Uhl · Plochingen, DE

Key dates

• Filing date: Mar 5, 2014
• Grant date: Mar 1, 2016
• Expiry date: Aug 30, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B27B17/025
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A guide bar for a chain saw has an elongate main body of steel. The main body has flat sides and upper and lower peripheries defining a guide groove for a saw chain. An elongate window is formed in the main body between the peripheries and is filled with an insert made of a fiber composite material made up of resin and fibers. The fibers are in the direction of the longitudinal axis of the main body. The insert includes a plurality of fiber layers that are bonded with resin. A central layer is formed from a fiber layer and the fibers thereof are at an angle to the longitudinal axis. Two fiber layers having fibers oriented in the direction of the longitudinal axis of the main body are on both sides of the central layer. The inner fiber layers are covered outwardly by a woven fabric.