Patents by Inventor James W. Kohl

James W. Kohl 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).

  • Articulatable fume exhauster trunk
    Patent number: 4860644
    Abstract: Fumes are drawn by a vacuum source from a scoop through conduit. The conduit provides its own structure with rigid tubes and which are held with respect to one another, a mounting collar and the scoop by joint attaching assemblies and. In this way, the fume exhauster requires minimal structure. Also, joint assemblies minimize flow resistance since they are located along inside conduit curvatures.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: August 29, 1989
    Assignee: Donaldson Company, Inc.
    Inventors: James W. Kohl, Mark D. Belcher