Cutting filament for a vegetation cutter

US5220774A · kind A · utility

Assignee

• Andreas Stihl · DE

Inventors

• Jorg Harbeke · Waiblingen, DE
• Klaus-Peter Schmitz · Rostock, DE

Key dates

• Filing date: Feb 22, 1991
• Grant date: Jun 22, 1993
• Expiry date: Feb 22, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/298
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a cutting filament for a vegetation cutter. The vegetation cutter includes a drive motor which sets the cutting filament in motion thereby producing noise. The cutting filament extends substantially radially outwardly because of the centrifugal force. The cutting filament reduces noise especially at high rotational speeds and thus also at high peripheral speeds. This is achieved in that the cutting filament is configured to have a cross section not having point symmetry. The cutting filament preferably has at least one slot and/or protrusion formed in the surface thereof to extend in the longitudinal direction. The slot and/or protrusion can, for example, be formed so as to follow a helical path with respect to the longitudinal axis of the filament or it can extend parallel to this axis.