Patents by Inventor Gerhard Schorradt

Gerhard Schorradt 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).

  • Hydraulic shield-type support
    Patent number: 4313698
    Abstract: The invention is concerned with a hydraulic shield-type support for supporting roofs in mines comprising a pair of base slides between which is located a channel-section guide beam supporting an hydraulic ram. At the rear end of the hydraulic ram a yoke is pivotally connected at a central part thereof to the rear end of the guide beam, the two outer portions of the yoke being pivotally connected to the rear end portions of the base slides. The front extendable end of the ram is connected to an elongate flat tongue which is longitudinally slidable in the guide beam underneath the hydraulic ram.
    Type: Grant
    Filed: February 6, 1980
    Date of Patent: February 2, 1982
    Assignee: Hermann Hemscheidt Maschinenfabrik GmbH & Co.
    Inventors: Alfred Maykemper, Gerhard Schorradt, Gunter Werth