Patents by Inventor J. James Dunn

J. James Dunn 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).

  • Pipe nesting device
    Patent number: 4413733
    Abstract: A device for holding nested bell and plain end push on joint pipes in a fixed position utilizing a novel frame work of simple members fastened firmly together. The inner pipe may be held concentrically or eccentrically with respect to the outer pipe.Padding may be added to protect inside coatings, and safety strapping offers added security that allows an abrasion resistant sheet to be held in place until disassembly occurs.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: November 8, 1983
    Assignee: U.S. Pipe and Foundry Company
    Inventors: J. James Dunn, Robert M. Graham