Patents by Inventor Willem L. Streefkerk

Willem L. Streefkerk 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: 4556349
    Abstract: A partition for a cargo carrier (1) for bulk freight. The cargo carrier is provided with an unloading opening (3) closable by a door (4') or board at the location of a partition to be positioned at the inner side thereof. The partition includes a number of profiles (8) to be positioned horizontally across the unloading opening (3) in superposed relation into two supports (4). The supports (4) are provided at the location of the walls of the cargo carrier and extend perpendicular to the plane of the unloading opening (3). Each of the supports (4) includes a plate (4) the height of which corresponds substantially with the height of the partition. The plate (4) is placed against the inner wall of the cargo carrier and has parallel to the plane of the wall of the cargo carrier a dimension such that the bulk freight urges the plate (4) against said wall by a sufficient force as to hold the plate (4) by friction.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: December 3, 1985
    Assignee: Koninklijke Emballage Industrie Van Leer B.V.
    Inventors: Willem Koudstaal, Willem L. Streefkerk