Patent · US Active

Power tool

US8668027B2 · kind B2 · utility

4Cited by

17References

21Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Joachim Hoffmann · Esslingen am Neckar, DE
Stefan von Siegroth · Fellbach, DE

Key dates

Filing date	May 8, 2009
Grant date	Mar 11, 2014
Priority date	—
Expiry date	Feb 26, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB24B23/00
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A power tool with a drive motor and a drive belt guided about a drive pulley and an output pulley has a tool driven by the drive motor through the drive belt. A tensioning device is provided that changes a spacing between the drive pulley and the output pulley and has at least one tensioning position and at least one release position. In the at least one tensioning position, the drive pulley and the output pulley have a first spacing relative to one another and in the at least one release position have a second spacing to one another that is smaller than the first spacing. The drive belt is an elast belt and the tensioning device, as a result of inherent tension of the elast belt, is secured in the at least one tensioning position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.