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:
Jun. 30, 2015
Filed:
Jul. 22, 2011
Andreas Fuchs, Bern, CH;
Klaus Fiederer, Dürbheim, DE;
Lars Girsberger, Schaffhausen, CH;
Emiliano Villanova, Neunkirch, CH;
Andreas Fuchs, Bern, CH;
Klaus Fiederer, Dürbheim, DE;
Lars Girsberger, Schaffhausen, CH;
Emiliano Villanova, Neunkirch, CH;
Marquardt GmbH, Rietheim-Weiheim, DE;
Abstract
A device for reversing the direction of rotation and/or for adjusting the carbon brushes for a reversible electric motor, in particular for an electric hand tool, with a base and with a mount, which is mounted pivotably on the base and on which brushholders for the carbon brushes wiping over the collector of the electric motor are arranged. The electric motor can be driven by means of power electronics, such as a pulse width controller, a phase gating controller, a phase chopping controller or the like. The power electronics are arranged on the base and/or on the mount. The device furthermore has fixed contacts and switching contacts, which interact with alternate contact-making for reversing the direction of rotation of the electric motor as the mount is pivoted.