Patents by Inventor Wilfried Witulski

Wilfried Witulski 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).

  • Mining method and mining machine for cutting away hard mineral materials
    Patent number: 4181363
    Abstract: A mining method for cutting away hard mineral materials of a mining face, comprises, undercutting the mineral material by directing a liquid jet into the running face to form a mineral slab which overlies the undercutting and breaking the bond of the slab from the main face by striking it with a wedge-shaped impact tool in the undercut area and conveying away the broken-off material. The apparatus for carrying out the mining operation comprises a machine which is adapted to run along the mining face alongside a conveyor for conveying away the material. The machine includes an operating mechanism for moving a breaking head at each end inwardly into the mine face and along the mine face. The breaking head carries a percussion wedge member which may be driven into the mine face.
    Type: Grant
    Filed: March 28, 1978
    Date of Patent: January 1, 1980
    Assignee: Gutehoffnungshutte Sterkrade A.G.
    Inventors: Heinrich Goris, Roland Gunther, Kurt Ogorek, Karl-Heinz Schwarting, Wilfried Witulski