Patents by Inventor Willi Heyer

Willi Heyer 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).

  • Tensioning a longwall mineral mining installation
    Patent number: 4169689
    Abstract: Mining apparatus comprises a longwall conveyor and tensioning means for tensioning the conveyor in its longitudinal direction. The tensioning means is constituted by a plurality of hydraulic tensioning rams, each of which is mounted, in use, by means of pivot joints at each end thereof directly between the conveyor and a respective roof support unit of a roof support assembly. Each tensioning ram extends at an acute angle to the longitudinal axis of the conveyor. The tensioning rams are positioned in two groups, one in each end zone of the conveyor.
    Type: Grant
    Filed: March 22, 1978
    Date of Patent: October 2, 1979
    Assignee: Gewerkschaft Eisenhutte Westfalia
    Inventors: Walter Weirich, Michael Dettmers, Christoph Rassmann, Willi Heyer, Herbert Beyer, Horst Linke