Patents by Inventor Leif A. Hellgren

Leif A. Hellgren 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).

  • Discharge gate device for bulk cargo hoppers, particularly hoppers in bulk cargo vessels
    Patent number: 4402436
    Abstract: In a discharge gate arrangement for cargo hoppers for bulk cargo, a cover is guided for sliding in its own plane between a closed and an open position. The cover is also mounted for movement towards and away from the plane of the discharge opening at the end of the closing movement and the beginning of the opening movement, respectively. In the closed position the cover presses against a gasket laid around the opening, providing a gas- and liquid-tight seal.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: September 6, 1983
    Assignee: AB Nordstroms Linbanor
    Inventor: Leif A. Hellgren