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. 18, 2007
Filed:
Mar. 03, 2003
Rainer Sperling, Biebertal, DE;
Martin Schwarzer, Schoeffengrund, DE;
Rolf Heilmann, Giessen, DE;
Bernd Rinn, Biebertal, DE;
Rainer Sperling, Biebertal, DE;
Martin Schwarzer, Schoeffengrund, DE;
Rolf Heilmann, Giessen, DE;
Bernd Rinn, Biebertal, DE;
Schunk Kohlenstofftechnik GmbH, Heuchelheim, DE;
Abstract
A method for production of a multi-layer carbon brush including at least two electrically-conducting functional layers made from carbon material and at least one insulation layer made from an electrically-insulating material, running between consecutive functional layers. According to the invention, the corresponding multi-layer carbon brushes and the layers with desired thickness can be produced by applying the carbon material and the electrically-insulating material in a mold in a sequence corresponding to the layer sequence of the multi-layer carbon brush for production in powder form, then pressed and finally heat-treated.