Patents by Inventor Allan J. Theisen

Allan J. Theisen 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: 4981406
    Abstract: A screw or bolt has a conventional threaded shank and a tapered pilot or lead end for easy entry to a threaded receptacle or nut. A pilot lead extends axially from the end of the shank. In one form, the pilot is cylindrical having an axis that either intersects or is parallel to the axis of the shank. Partial threads extend around the portion of the periphery of the pilot and an unthreaded transition surface angularly spaced from, transversely opposite, the partial threads extends to the outer surface of the shank. In another form, the pilot is elliptical having partial threads extending over a portion of its periphery and an unthreaded surface transversely opposite the pilot threads.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: January 1, 1991
    Assignee: Ford Motor Company
    Inventors: Ronald G. Weiss, James A. Levitte, Jonathon P. Schmidt, Allan J. Theisen