Patent ID: 8847463

Claim:
A carbon brush for transmitting high currents, the brush comprising: a connection element for connecting an electrical connection track, the connection element having a first composition; a consumable contact element having a contact surface that is designed to lie flush against a commutator device, the contact element having a second composition different than the first composition; and a layer transition zone coupling the connection element with the contact element to form a one-piece molded body wherein the layer transition zone has a major axis aligned perpendicularly to the direction of wear of the carbon brush, wherein the second composition has a greater carbon fraction than the first composition, wherein the first and the second composition each have a metal fraction, the metal fraction of the second composition differing from the metal fraction of the first composition, said metal fraction of said second composition being greater than said carbon fraction of said second composition, wherein the metal fraction of the contact element is mostly silver and the metal fraction of the connecting element is mostly copper.