Patents by Inventor William J. Groos

William J. Groos 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).

  • Railroad hopper car vent
    Patent number: 4896590
    Abstract: The invention is directed to a venting device for admitting air into an enclosed container such as a railway car during discharge of material from the container. The device includes a securing member having an interlock for releasably retaining a replaceable filter member that is adapted to admit air into the container. The mounting member is adapted for mounting in an opening in the container member. A securing member has a one way interlook with the mounting member which may be overridden for disassembly and a releasable interlock with the filter member.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: January 30, 1990
    Assignee: Pullman Leasing Company
    Inventor: William J. Groos