Patent ID: 7514836
Filing Date: 2009-04-07
Classification: H01R

Abstract:
1. A current transfer unit, comprising: a carbon brush guide formed from a flat sheet of aluminum, having at least one aluminum oxide layer functioning as an insulating layer, and having unbent faces and shaped regions beginning and ending with convex curvatures; and a carbon brush, at least one of said carbon brush and said carbon brush guide being shaped such that said carbon brush can only come into contact with said unbent faces of said carbon brush guide, wherein the aluminum sheet is anodized prior to a bending process that bends the flat sheet and the carbon brush includes a plurality of sides and a plurality of transition areas, each of the transition areas forming a transition between a respective side of the carbon brush and another side of the carbon brush and the carbon brush being disposed in the carbon brush guide with the carbon brush guide having a first unbent face of the carbon brush guide in facing relationship to one side of the carbon brush, a second unbent face of the carbon brush guide in facing relationship to another side of the carbon brush interconnected to the one respective side of the carbon brush by a respective transition area, and a first shaped region of the carbon brush guide extending between the first and second unbent faces of the carbon brush guide, the first shaped region of the carbon brush guide having a curvature facing away from the carbon brush in a manner such that, in the event of a displacement of the carbon brush relative to the carbon brush guide, the one side of the carbon brush and the another side of the carbon brush respectively come into contact with the first unbent face of the carbon brush guide and the second unbent face of the carbon brush guide and there is no contact between the respective transition area of the carbon brush and the first shaped region of the carbon brush guide.