Patents by Inventor Robert F. Valli

Robert F. Valli 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).

  • Vibration dampened table bushing assembly for rotary drilling machines
    Patent number: 5119890
    Abstract: A table bushing is used with a rotary drilling machine of the type having a table through which a drill steel passes. The table bushing uses an automotive tire, or like resilient annular tube, to center the table bushing within an oversized hole in the table. The tire, the pressure of which can be varied according to the operating conditions, dampens vibrations generated while drilling under high thrust loads.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: June 9, 1992
    Assignee: Reichdrill, Inc.
    Inventor: Robert F. Valli