Patents by Inventor John R. Pratte

John R. Pratte 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).

  • Adjustable thickness vent door assembly for cargo bodies
    Patent number: 4112621
    Abstract: A vent door and frame assembly for cargo bodies includes a pair of rectangularly shaped frame members one of which defines a door frame opening and supports in hinged relation a vent door. The frame members during assembly with a wall construction are positionable in telescoping relation wherein they overlap opposite sides of a cargo body and when in this position form a permanent frame structure connected to the sides of the body. By virtue of the telescoping relationship of the frame parts the frame assembly is adapted to be readily utilized with cargo bodies having walls of different thickness.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: September 12, 1978
    Assignee: Pullman Incorporated
    Inventors: Leonard M. Ehrhart, John R. Pratte, Paul E. Mazik, Jr.