Patents by Inventor Bill Adby Black

Bill Adby Black 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).

  • Patent number: 3970158
    Abstract: Deformable pads are inserted under the hard metal inserts used to form the earth removing teeth of an earth boring bit. The inserts are typically formed of sintered tungsten carbide, with a cylindrical body beveled at the lower end to facilitate insertion into an interferringly sized drilled hole. The volume of the deformable pad or plate is greater than the remaining voids between the hole, the plate and the assembled insert upon initial assembly. Repetitive loading of the insert during drilling deforms the plate to fill said space to evenly distribute stress between the insert and the wall of its retaining hole. A radius between the corner of the wall and bottom of the hole minimizes stress at this corner.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: July 20, 1976
    Assignee: Hughes Tool Company
    Inventors: Bill Adby Black, Johannes Gerardus Leon Eenink