The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2008
Filed:
Jul. 17, 2006
Helmut Zimmermann, Berglen, DE;
Roland Schierling, Affalterbach, DE;
Johannes Menzel, Wernau, DE;
Kai-ulrich Machens, Stuttgart, DE;
Helmut Zimmermann, Berglen, DE;
Roland Schierling, Affalterbach, DE;
Johannes Menzel, Wernau, DE;
Kai-Ulrich Machens, Stuttgart, DE;
Andreas Stihl AG & Co. KG, Waiblingen, DE;
Abstract
A protective shield () is provided for a free-cutting tool (). The free-cutting tool has a cutterhead () rotatable about a rotational axis () and carries a cutting filament (). For a rotating cutterhead (), the cutting filament () rotates in a rotational direction (), aligns itself approximately radially to the rotational axis () and defines a cutting circle () having a constructively pregiven nominal radius (R). The cutting radius () is at least partially covered by the protective shield (). A cut-to-length knife () having a cutting edge () for cutting the cutting filament () to length is mounted on the protective shield () in the peripheral region thereof. The cut-to-length knife () is mounted on the protective shield () to be moveable back and forth between a cutting position () and a rest position (). The cutting edge () lies in the plane of the cutting circle () in the cutting position () and has the nominal radius (R) to the rotational axis () and, in the rest position (), the cutting edge () lies outside of the cutting circle ().