Patents by Inventor David K. Snediker

David K. Snediker 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).

  • Adherent crack gauge
    Patent number: 4255974
    Abstract: A crack gauge for monitoring the progress of fatigue crack propagation in a conductive substrate is made by applying an inorganic insulating layer and then a metallic conductor. The conductor is laid in a geometry which results in a change in a measured electrical property of the conductor (e.g., resistance) as a fatigue crack propagates through the substrate and breaks the conductor. The adherent crack gauge is especially reliable in hostile environments. A special conductor geometry is useful for especially fatigue resistant substrates.
    Type: Grant
    Filed: June 14, 1979
    Date of Patent: March 17, 1981
    Assignee: Battelle Development Corporation
    Inventors: Keith F. Dufrane, David K. Snediker