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:
Dec. 08, 2009
Filed:
Dec. 08, 2006
Applicants:
Andre Bollwerk, Freiberg A.N., DE;
Wolfgang Reeb, Ottersweier Hatzenweier, DE;
Reiner Fellmeth, Besigheim, DE;
Inventors:
Andre Bollwerk, Freiberg A.N., DE;
Wolfgang Reeb, Ottersweier Hatzenweier, DE;
Reiner Fellmeth, Besigheim, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01R 39/58 (2006.01); G08B 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and a device, respectively, for detecting the amount of wear on the carbon brush drive system of an electrically commutated d.c. motor which is used, for example, in the form of a pump motor in a motor vehicle. The d.c. motor is driven by at least two carbon brushes and includes means for detecting the generative follow-up voltage. The amount of wear on at least one carbon brush is derived from the time behavior of the generative motor voltage and displayed to the driver.