Patents by Inventor Dieter Plenter

Dieter Plenter 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).

  • Pivot connections for use with mine roof supports
    Patent number: 4708531
    Abstract: A mine roof support has gap seals in the form of L-shaped plates on its roof cap and goaf shield. The side walls of the plates overlap at the junctures between the roof cap and the goaf shield and these walls are interconnected with pivot connections each of which is composed of complementary components fitted into openings in the walls. The components combine to form a pivot journal and and are locked to one another by a twist catch which can be released by relative rotation of the components.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: November 24, 1987
    Assignee: Gewerkschaft Eisenhutte Westfalia GmbH
    Inventor: Dieter Plenter