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:
May. 20, 1997
Filed:
Nov. 07, 1994
Heinz Flaig, Bochum, DE;
Josef Saeftel, Castrop-Rauxel, DE;
Harald Bitsch, Witten, DE;
Herbert Dreher, Witten, DE;
Axel Hauschild, Dortmund, DE;
Johannes Kluge, Wetter, DE;
Anton Munzebrock, Dortmund, DE;
Dirk Schulte, Schwerte, DE;
Roland Staggl, Wetter, DE;
Karl Zacharias, Schwerte, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Abstract
An electric drive with brakes, in particular for hoists, lifting devices or positioning transporting systems, having a brake disk which is movable axially on a motor shaft so as to rotate therewith via a toothing. The brake disk has brake faces at both sides and can be pressed against a stationary counter-brake disk by a spring force. An electromagnetic device is provided which, when connected to current, causes the brake to be released against the spring force. The electromagnetic device has a.c. magnets and E-shaped magnet coil yokes. The counter-pole faces associated with the coil yokes are arranged at magnet yokes which can move angularly on all sides so that the counter-pole faces can be aligned at the end faces of the E-shaped magnet coil yokes located opposite thereto when current is applied to the a.c. magnet.