Patents by Inventor Herbert L. Zigler

Herbert L. Zigler 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).

  • Light weight fatigue resistant railcar truck bolster
    Patent number: 5111753
    Abstract: A light weight fatigue resistant cast steel bolster for a freight railcar truck without any opening in the bolster bottom wall having internal risers connected to the bottom wall at bend points and with a ratio of metal in the top and bottom walls that lessens the distance of the neutral axis above the bolster bottom wall as compared to comparable prior art bolsters.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: May 12, 1992
    Assignee: Amsted Industries Incorporated
    Inventors: Herbert L. Zigler, Robert D. Wronkiewicz, Franklin McKeown, Jr., William A. Wachter