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:
Apr. 14, 2009
Filed:
May. 30, 2003
Winfried Habel, Leinfelden-Echterdingen, DE;
Otto Baumann, Leinfelden-Echterdingen, DE;
Siegfried Fehrle, Leinfelden-Echterdingen, DE;
Andre Ullrich, Filderstadt-Bernhausen, DE;
Michael Weiss, Stuttgart, DE;
Hardy Schmid, Stuttgart, DE;
Winfried Habel, Leinfelden-Echterdingen, DE;
Otto Baumann, Leinfelden-Echterdingen, DE;
Siegfried Fehrle, Leinfelden-Echterdingen, DE;
Andre Ullrich, Filderstadt-Bernhausen, DE;
Michael Weiss, Stuttgart, DE;
Hardy Schmid, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An electric motor includes carbon brushes () disposed in a holder () that are pressed by means of a spring force () in a radial direction against a jacket face of a cylindrical collector () that is fixed to an armature shaft () of the motor. The holder () for the carbon brushes () can be removed from the motor with little effort as a result of a provision of covering means () that cover a pivot bearing () of the armature shaft () to protect it against the entry of dirt on a side of the covering means () facing the holder () for the carbon brushes (), provided with one or more chamfers () in such a way that the carbon brushes () slide over the covering means () as the holder () is being pulled off and that the carbon brushes () thereby are thrust radially outward counter to the spring force ().