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, 2025
Filed:
Oct. 28, 2021
Festool Gmbh, Wendlingen, DE;
Michael Thüringer, Großbettlingen, DE;
Alexander Fürst, Donzdorf, DE;
Patrick Schnelle, Ostfildern, DE;
Tobias Hofmann, Kirchheim, DE;
Michal Calta, Ceská Lípa, CZ;
Festool GmbH, Wendlingen, DE;
Abstract
A power tool, in particular a hand-held power tool, for example a polishing device, a grinding device and/or a sawing device, with a tool, an electric motor for driving the tool and a control unit for controlling the electric motor. The power tool is designed for connection to a mains voltage and includes a rectifier arrangement with an intermediate circuit for providing an intermediate circuit voltage based on the mains voltage, the Intermediate circuit voltage having a plurality of successive voltage half-waves, and the control unit being configured to provide, for each voltage half-wave, a respective torque half-wave for driving the electric motor, the waveform of which torque half-wave is flattened with respect to the waveform of the voltage half-wave.