Patents by Inventor Friedhelm Maiworm

Friedhelm Maiworm 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: 6129041
    Abstract: When motor vehicle wheels are subjected to a coating process, the fastener holes must be masked. Masking elements are inserted into pilot holes of the fastener holes for masking the fastener holes during the coating process. The masking elements are such that they a form-locked in the respective pilot hole. In the apparatus in accordance with the invention a controlled swivel arm with a feed hopper is provided for feeding each masking element to the pilot hole of the fastener hole. After the coating process the masking element is removed from the pilot hole by swivel movement of the wheel, such that the masking element drops out of the pilot hole.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: October 10, 2000
    Assignee: Stahlschmidt und Maiworm GmbH
    Inventors: Friedhelm Maiworm, Gottfried Graf
  • 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
  • Patent number: D387319
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: December 9, 1997
    Assignee: Aluster Wheels Trading GmbH
    Inventors: Michael Timm, Friedhelm Maiworm