Patents by Inventor Mark A. Polzin

Mark A. Polzin 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).

  • Railway wheel
    Patent number: 5333926
    Abstract: A steel railway wheel with reduced axial flange deflection and reduced, thermally-induced, residual-tensile stress in the wheel rim, has a clearly defined relationship among the plate angle, the maximum depth of curvature of the wheel plate segment, the location of the maximum depth of curvature, the wheel hub and the rim, which relationship is provided for plate segments both concave and convex with respect to the wheel outboard surface.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: August 2, 1994
    Assignee: AMSTED Industries Incorporated
    Inventors: C. Dale Christie, Michael T. Gallagher, Michael J. Hendricksen, John D. Oliver, Mark A. Polzin