Patents by Inventor Jorgen Spangenberg

Jorgen Spangenberg 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).

  • Process for the production of multi-layered brushes and brushes obtained by the process
    Patent number: 5701046
    Abstract: The process comprising the charging into a mould (3) of at least one electrically conductive powder (4), the compression by means of a piston (5) of the contents of the mould to form a crude brush (7), the heat treatment of said crude brush (7) as well as the fixing of the ends of the electrical conductors (2), characterised in that the charging involves at least the simultaneous introduction of at least two conductive powders (4B, 4A and/or 4C . . . ) for obtaining a brush formed by integral blocks (1B, 1A and/or 1C . . . ), the junction (1AB and/or 1BC . . . ) between said blocks being orientated at least in part in the compression direction (13).
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: December 23, 1997
    Assignee: Le Carbone Lorraine
    Inventors: Eric Kammerer, Lothar Biering, Erhard Grohs, Klaus Groht, Conrad Reynvaan, Horst Siegmund, Jorgen Spangenberg, Arwed Uecker