Patents by Inventor Stephen G. Dawe

Stephen G. 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).

  • Drill adaptor
    Patent number: 4638874
    Abstract: The invention provides an adaptor which comprises a hexagonal tail portion adapted to engage in a drilling machine, and a leading portion which is adapted to receive a circular drill rod in locking relationship. Sealing means is provided between the drilling machine and the adaptor and the latter and the drill rod.
    Type: Grant
    Filed: July 26, 1983
    Date of Patent: January 27, 1987
    Assignee: Coalequip (Proprietary) Limited
    Inventors: Stephen G. Dawe, James A. Brews