Patents by Inventor Dennis J. Wickman

Dennis J. Wickman 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).

  • Chair control mechanism
    Patent number: 5207479
    Abstract: The present invention is an office chair capable of dynamically tilting to provide a desired seat inclination from an upright position to a maximum tilted position. The preloading mechanism of the spring includes an adjusting screw and a tension arm which provides leverage. The leverage of the preloading mechanism facilitates turning the adjusting screw to vary the preloaded tension of the springs. Also, a spindle cover is provided to stop movement of the seat at the maximum tilted position, and to stop movement of a toggle mechanism at the upright position.
    Type: Grant
    Filed: June 6, 1990
    Date of Patent: May 4, 1993
    Assignee: Kimball International, Inc.
    Inventors: Dennis J. Wickman, Dennis R. Motz, Steven F. Trinkel