Patents by Inventor Douglas G. Valentine

Douglas G. Valentine 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).

  • Hardened material supported rock bolt and apparatus for installing same
    Patent number: 4765778
    Abstract: A rock bolt system (10) including a mechanical rock bolt (12) having an interior channel (24) therein and a feeder attachment (14). An anchor may be affixed to the distal end of the rock bolt (12). An aperture (22) extends from the rock bolt (12). The feeder attachment (14), capable of being demountably affixed to the proximal end of the rock bolt (12), supplies hardenable material to the interior channel (24) where it courses through the interior of the rock bolt (12) and exits into the bore hole (16) through the aperture (22). A breather tube (38) extending from the feeder apparatus and into the interior channel (24) permits entrapped air to escape.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: August 23, 1988
    Assignee: Inco Limited
    Inventor: Douglas G. Valentine