Patents by Inventor Franz Schlegl

Franz Schlegl 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).

  • Roof bolt drilling and setting apparatus
    Patent number: 5913573
    Abstract: A displaceable mining machine (1) comprises roof bolt drilling and setting apparatus (5, 13). A conveyor (6) is articulately pivotable in a rear portion of the machine about axes (16, 16') in order to provide space for a roof bolt drilling and setting apparatus (13) pivotable via an articulated arm (12) and operating behind the mining machine (1).
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: June 22, 1999
    Assignee: Voest-Alpine Bergtechnik Gesellschaft m.b.H.
    Inventors: Franz Schlegl, Alfred Zitz