Patents by Inventor Jürgen Spangenberg

Jürgen 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 manufacturing a sliding contact piece for medium to high current densities
    Patent number: 7449144
    Abstract: A process for manufacturing a sliding contact piece for medium to high current densities including a step of warm premixing of graphite and plastic binder, a step of cold mixing of the resulting premixture with copper, a step of pressing of the resulting main mixture into the sliding contact piece, and finally a step of sintering of it; and so as to improve the operating characteristics of the sliding contact piece, which is free of any environmentally harmful additives, a metal such as zinc, tin, bismuth or an alloy of such metals is added during the premixing of the graphite and plastic binder.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: November 11, 2008
    Assignee: Deutsche Carbone AG
    Inventors: Wilhelm Latz, Jürgen Spangenberg, Arwed Uecker