Patents by Inventor Winfried Brettmann

Winfried Brettmann 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).

  • Roll commutator for electric motors and dynamos, and method of manufacturing it
    Patent number: 5602438
    Abstract: A roll commutator for electric motors has a plurality of bars adjacent to one another and produced from a continuous metal section. The metal section already has projections on one of its sides before the production of the bars, which projections serve as anchoring claws after rolling up the line portions produced from the metal section. Additional tools and processing steps are not needed since it is not necessary to process the claws when manufacturing the roll commutator.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: February 11, 1997
    Assignee: Robert Bosch GmbH
    Inventors: Ludwig Reisnecker, Martin Schwertle, Winfried Brettmann, Friedrich Behrens, Hans Deierling, Peter Franz, Siegfried Hauptmann, Claus Pollack, Stefan Ossenkopp