Patents by Inventor Robert F. Oory

Robert F. Oory 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).

  • Concrete discharge hopper
    Patent number: 4278190
    Abstract: A very large hopper capable of discharging concrete of varying consistency onto a moving belt conveyor in a smooth continuous ribbon. The hopper will handle concrete which is predominately mortar, up to concrete having aggregate comprising 4 to 6 inch mean diameter rocks. In a preferred embodiment the hopper has a flat inclined wall containing a discharge opening closed by a sliding primary gate with a "W" shaped leading edge; the primary gate also having a discharge opening closed by a sliding secondary gate.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: July 14, 1981
    Assignee: Rotec Industries, Inc.
    Inventors: Robert F. Oory, Charles J. Arndt