Patents by Inventor Ernst Gebehart

Ernst Gebehart 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).

  • Apparatus for preventing cave-ins of excavations
    Patent number: 3949562
    Abstract: An apparatus is disclosed for preventing cave-ins of mining galleries and other underground excavations. It includes a base, a roof-supporting shield extending upwardly from the base and a free edge to which a roof-supporting cap is pivoted, and an advancing arrangement for advancing the apparatus towards and away from a face of the excavation. The advancing arrangement has a shiftable carriage which can move towards and away from this face and which has an end directed towards the latter, and an extension section is telescopable into and out of this end and can be arrested in a plurality of different telescoped positions.
    Type: Grant
    Filed: June 6, 1974
    Date of Patent: April 13, 1976
    Assignee: Bochumer Eisenhutte Heintzmann & Co.
    Inventors: Gunter Blumenthal, Ernst Gebehart