Patents by Inventor John C. Bothwell

John C. Bothwell 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).

  • Bench mining method and apparatus
    Patent number: 4979781
    Abstract: A method and apparatus for bench mining employs a rotating wheel excavator with excavator wheel positioned outwardly to one side of a tractor unit for the excavator so that the tractor unit draws the excavation wheel along a bench line or cut line between different layers of the bench mine. The cutting wheel can either be moved to opposite sides of the tractor unit or a second wheel can be positioned at the other side so that the excavator can operate in both directions of movement.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: December 25, 1990
    Assignee: G.D. Mechanial Design Ltd.
    Inventors: John C. Bothwell, Glen H. Doyle