Patents by Inventor Hans-Joachim Pforr

Hans-Joachim Pforr 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).

  • Patent number: 5454628
    Abstract: In order to prevent contact corrosion when a magnesium wheel is fixed to a wheel mount of a motor vehicle, a configuration is provided in which an annular aluminum spacer is inserted between an inner contact surface of the magnesium wheel and the wheel mount in the vicinity of fixing bores. A central centering device in the form of an annular plastic adapter is squeezed into a hub bore of the magnesium wheel in order to cover the radially inner peripheral surface of the spacer and to center the same.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: October 3, 1995
    Assignee: Stahlschmidt & Maiworm GmbH
    Inventors: Friedhelm Maiworm, Hans-Joachim Pforr
  • Patent number: D339561
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: September 21, 1993
    Assignee: ATS Leichtmetallrader GmbH
    Inventors: Friedhelm Maiworm, Hans-Joachim Pforr