Patents by Inventor Stanley A. Tjapkes

Stanley A. Tjapkes 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: 5313853
    Abstract: A drop-in type shifter is provided for an automotive transmission, the shifter employing one or more washer-like flat springs for spring biasing a shift stick to a predetermined position on the shifter and actuatable for changing the drive ratio of the transmission when the shift stick is pivoted. A base is adapted for mounting the shifter on the transmission. A spherical socket is disposed on the base, and a spherical ball is disposed on the shift stick, the shift stick being received in the ball for pivotally mounting the shift stick on the base. One or more flat washer-like springs are provided having an aperture through which the upper end of the shift stick extends, the washer-like spring being normally planar in an unstressed condition but being compressible into a curvilinear predetermined cross-sectional shape as installed.
    Type: Grant
    Filed: December 14, 1992
    Date of Patent: May 24, 1994
    Assignee: Grand Haven Stamped Products Company, Div. of JSJ Corporation
    Inventors: Bruce E. Olmsted, Stanley A. Tjapkes