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. 22, 2007
Filed:
Apr. 18, 2002
Moritz Bauer, Augsburg, DE;
Bodo Benitsch, Buttenwiesen, DE;
Martin Christ, Wehringen, DE;
Udo Gruber, Neusäss, DE;
Michael Heine, Allmannshofen, DE;
Andreas Kienzle, Thierhaupten, DE;
Jens Rosenlöcher, Augsburg, DE;
Rainer Zimmermann-chopin, Ellgau, DE;
Moritz Bauer, Augsburg, DE;
Bodo Benitsch, Buttenwiesen, DE;
Martin Christ, Wehringen, DE;
Udo Gruber, Neusäss, DE;
Michael Heine, Allmannshofen, DE;
Andreas Kienzle, Thierhaupten, DE;
Jens Rosenlöcher, Augsburg, DE;
Rainer Zimmermann-Chopin, Ellgau, DE;
Audi AG, Ingolstadt, DE;
Abstract
A friction disc, in particular a brake or clutch disc, includes carbon fiber-reinforced ceramic composite material with at least one top surface formed as a friction surface. At least part of the friction surface is formed of a different material, in particular of a carbon-containing material. The different material exhibits lower wear and oxidation resistance than that of the rest of the friction surface and a supporting zone of the friction disc. A visual, audible or mechanical signal is produced under operating conditions due to comparatively greater wear. The signal provides a warning that the service life of the friction disc is being exceeded. A process for producing the friction disc is also provided.