Patents by Inventor William Z. Nelson

William Z. Nelson 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).

  • Method and apparatus for hardening axially spaced cams on a camshaft
    Patent number: 4728761
    Abstract: Method and apparatus for inductively heating and quench hardening axially spaced cams on a steel camshaft having a longitudinally extending rotational axis concentric with a plurality of axially spaced bearings, which method and apparatus utilizes an induction heating coil having an inner surface surrounding the rotational axis of the camshaft with an insulating gap and integral quench openings for directing quenching liquid inwardly from the heating coil for the workpiece, and a high frequency power supply for selectively energizing the heating coil with a power density within the heating coil of about 20KW/in.sup.2 and an auxiliary cooling assembly fixed with respect to the heating coil and including an arrangement for spraying a cooling liquid toward the camshaft.
    Type: Grant
    Filed: May 5, 1986
    Date of Patent: March 1, 1988
    Assignee: Tocco, Inc.
    Inventors: George M. Mucha, John R. Laughlin, William Z. Nelson, Robert C. Johnson