Patents by Inventor Horst Ulm

Horst Ulm has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Carbon brush and fastening a braided indicator wire therein
    Patent number: 5488261
    Abstract: The invention relates to a carbon brush (10) with a braided indicator wire (26), (28) for indicating a defined wear of the carbon brush. The braided indicator wire is embedded in a blind bore (30), and is disposed spaced apart from the bottom (32) of the blind bore. To assure an exact indication of the wear of the carbon brush, the bottom of the blind bore is covered with a layer (40) consisting of an insulating material.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: January 30, 1996
    Assignee: Schunk Kohlenstofftechnik GmbH
    Inventors: Anton Swoboda, Edmund Kubler, Horst Ulm, Gunter Schardt