Patents by Inventor Stephen George Dawe

Stephen George Dawe 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).

  • Rock bolt
    Patent number: 7963725
    Abstract: A rock bolt (10) which includes An elongate tubular member (18), which is formed with an inlet (22) through which a pressurized fluid can pass, into an interior of the tubular member (18), thereby to expand the tubular member (18) in a radial direction, an elongate shank (12) with a first end (14) which is secured to the tubular member (18) and a second end (16), and an expansion unit (26) which has a wedge-shaped member (44) at the second end (16) of the shank (12).
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: June 21, 2011
    Assignee: Aveng (Africa) Ltd.
    Inventor: Stephen George Dawe