Patent · US Active

Adjusting device for an electric motor

US9071119B2 · kind B2 · utility

3Cited by

11References

14Claims

0Family size

Assignee

MARQUARDT GMBH · DE

Inventors

Andreas Fuchs · Aalen, DE
Klaus Fiederer · Mindelheim, DE
Lars Girsberger · Schaffhausen, CH
Emiliano Villanova · Neuhausen, CH

Key dates

Filing date	Jul 22, 2011
Grant date	Jun 30, 2015
Priority date	—
Expiry date	Nov 30, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH02K23/18
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

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