Patents by Inventor Fraser M. Barr

Fraser M. Barr 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).

  • Patent number: 4995522
    Abstract: The invention provides a shipping container apparatus for bulk granulated material, the apparatus having a lower wall with discharge openings therein. Doors are provided for opening and closing the discharge openings, the doors being actuated by an actuating structure which is mounted for vertical movement relative to the container apparatus. The actuating structure has upper portions which serve as conventional lifting connectors or receptacles at corners of the container, which cooperate with conventional hooks or dogs of a conventional container lifting apparatus, so that raising the actuating structure opens the doors, and lowering the actuating structure closes the doors. This permits granulated material within the container to be dumped into a lower container or conveyance without requiring any specialized lifting or opening equipment.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: February 26, 1991
    Inventor: Fraser M. Barr