Patents by Inventor Walter T. Durham

Walter T. Durham 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).

  • Double-ended stud with combined driving and locking means
    Patent number: 4223585
    Abstract: An integral stud member having shank portions extending from either side of a radially extending flange. A first shank portion including thread convolutions with means to form mating internal threads in an associated workpiece. The surface of the flange opposing the first shank including generally radially extending rib-like surfaces which serve as the means to drive the fastener in place. The rib structures are configured to permit a driver to softly engage the flange and to lock the fastener from backing out of the workpiece after a secondary work surface has been clamped over the flange.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: September 23, 1980
    Assignee: Illinois Tool Works Inc.
    Inventors: Gerald D. Barth, Walter T. Durham