Patents by Inventor John N. Macadam

John N. Macadam 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).

  • Splice for a structural member
    Patent number: 4993095
    Abstract: Spliced structural members for supporting a traffic deck on a short span bridge. A spliced structural member includes a plurality of metal box-shaped girder segments placed end to end and splice channels nested around the adjacent ends of the girder segments. A spliced joint is formed by connecting the splice channels to the adjacent ends of the girder segments. The spliced joint has at least 75% of the flexural and shear strength of the girder segments and provides continuity for structural strength and rigidity for the spliced structural member.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: February 19, 1991
    Assignee: Armco Inc.
    Inventors: Richard W. Lautensleger, John N. Macadam, Daniel F. Senf, David C. Trimmer