Patents by Inventor Ernest C. Bergquist

Ernest C. Bergquist 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).

  • Single wheelset railway truck sideframe
    Patent number: 4424750
    Abstract: A side frame for a single axle railway truck is provided. The side frame has top and bottom and spaced side walls. The side frame has a generally hollow cross section, with an upper middle portion, downwardly sloped intermediate portion and lower outer portions. The top and bottom walls have decreasing thickness inwardly from the end of the outer portions.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: January 10, 1984
    Assignee: AMSTED Industries Incorporated
    Inventors: Lynn K. Tilly, Ernest C. Bergquist