Patents by Inventor David A. Valek

David A. Valek 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).

  • Eddy current flaw detector having rotatable field defining sleeve for selectively enhancing induced eddy currents in a workpiece
    Patent number: 4673879
    Abstract: Method and apparatus for scanning a generally cylindrical workpiece for flaws. A cylindrical metallic sleeve is rotatably supported about a workpiece path of travel. Two differentially wound energization coils surround the sleeve near two apertures in the sleeve. The coils are energized with a high frequency signal that induces eddy currents in the workpiece. The apertures periodically disrupt the eddy current inducing magnetic fields and enhances signals from the coils indicative of the presence of flaws in the workpiece.
    Type: Grant
    Filed: June 27, 1984
    Date of Patent: June 16, 1987
    Assignee: Rupublic Steel Corporation
    Inventors: Richard M. Harris, David A. Valek, James M. Toth, Richard F. Abramczyk