Patents by Inventor Robert A. Bridwell

Robert A. Bridwell 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).

  • Hot stretch-wrap forming with resistance heating
    Patent number: 4011429
    Abstract: Stretch-wrap forming of titanium parts or the like by resistance heating the part and a steel forming element which is cast into a fused silica die insert. Heating is accomplished by an electrical circuit in which both the part and the element are connected in parallel. The part is stretch wrapped over the element while a low voltage, high amperage current is allowed to flow through both the part and the element.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: March 8, 1977
    Assignee: Northrop Corporation
    Inventors: Carl M. Morris, William E. Manchester, John L. Hill, Robert A. Bridwell, Douglas B. Hugill