Patents by Inventor Richard George Holtshausen

Richard George Holtshausen 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).

  • Pick holder extraction
    Patent number: 6059373
    Abstract: A pick holder (110) is frictionally seated via a round cylindrical barrel (112) in a pick box of a continuous miner. A pick is in operation rotationally located in a bore (114). The bore (114), toward a rear thereof, has an internal, inwardly projecting screw thread (30). When the pick has been removed, the pick holder (110) is extracted from the pick box by screwing a screw threaded shank into the screw thread (30), and applying an extracting force via the shank and the interengaged screw threads to the pick holder (110).
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: May 9, 2000
    Assignee: Kennametal Inc.
    Inventors: Noel G. Wright, Richard George Holtshausen