Patents by Inventor John F. Coulahan

John F. Coulahan 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: 4605156
    Abstract: Disclosed is a method and apparatus for forming a cold weld joint between parts comprising a sleeve (or coupling) to receive the ends of conductors (or pipes). The sleeve is provided with weld pads which when the sleeve cools will engage one of the conductors and be cold welded thereto by the forces of shrink fit. Serrations are provided for axial strength of the joint and to limit the plastic flow of the material of the pads. A second conductor is loosely telescoped in the sleeve by bellows for compensating for any misalignment when the parts are initially brought together. Later the bellows is provided with a backing material to rigidly connect the second conductor to the sleeve.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: August 12, 1986
    Assignee: General Dynamics Corporation/Convair Div.
    Inventors: Donald D. Stenger, John F. Coulahan