Patents by Inventor Werner Hellmuth

Werner Hellmuth 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).

  • Longwall mining machine for the mining of thick mineral seams
    Patent number: 4883323
    Abstract: A drum cutter mining machine translatable along a longwall conveyor includes an auxiliary cutting drum for breaking up pieces of mineral carried by the longwall conveyor system. The auxiliary cutting drum is supported by a jib and an arm extension affixed in a fixed relationship with a support arm. The auxiliary cutting drum is positioned by the same actuator which pivotally positions the drum-cutter cutting drum at a desired cutting height at the mine roof and other times at the floor. Positioning of the cutting drum at the desired cutting height automatically positioned the auxiliary cutting drum.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: November 28, 1989
    Assignee: Gebr. Eickhoff Maschinenfabrik und. Eisengieberei mbH
    Inventors: Friedhelm Henrich, Werner Hellmuth