Patents by Inventor Karl Dufour

Karl Dufour 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: 4974387
    Abstract: A braced framework comprises a truss, supported at its ends, on vertical studs. The latter and the adjacent truss chords are connected together at eaves joints and the truss top chords are connected together at a ridge joint. Each joint includes a metal connector having a connection leg for each of the truss chords and studs. The connection legs are channel elements each defining a chamber into which one chord is received, each chamber having a front opening and the chords being frame members each formed with an open web. As a result, once the chords are inserted into the connection leg chambers of the metal connectors, the assembly of the frame members and the connection legs, at each joint, may be carried out by welding from the front openings of the chambers and through the open webs of the frame members, thereby avoiding having to lift the framework and turn it upside down.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: December 4, 1990
    Inventor: Karl Dufour