Patents by Inventor Ernest W. Billingham

Ernest W. Billingham 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).

  • Screw for contaminated pre-tapped holes
    Patent number: 5000638
    Abstract: A locking screw having a head at one end, a special entry portion at the other end, and a trilobular shank portion extending from the entry portion toward the head. The screw is further characterized in that the thread profile is of a double angle configuration symmetrical about an axis perpendicular to the longitudinal axis of the screw. The entry section is tapered and is formed with a series of truncations which serve to clear progressively a contaminating coating in an internally threaded workpiece, such as a nut, when the screw is threaded therein.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: March 19, 1991
    Assignee: Conti Fasteners AG
    Inventors: Charles J. Essom, Ernest W. Billingham
  • Screw for contaminated pre-tapped holes
    Patent number: 4973209
    Abstract: A locking screw having a head at one end, a special entry portion at the other end, and a trilobular shank portion extending from the entry portion toward the head. The screw is further characterized in that the thread profile is of a double angle configuration symmetrical about an axis perpendicular to the longitudinal axis of the screw. The entry section is tapered and is formed with a series of truncations which serve to clear progressively a contaminating coating in an internally threaded workpiece, such as a nut, when the screw is threaded therein.
    Type: Grant
    Filed: March 28, 1985
    Date of Patent: November 27, 1990
    Assignee: Conti Fasteners AG
    Inventors: Charles J. Essom, Ernest W. Billingham