Patents by Inventor Dan C. Dong-Il

Dan C. Dong-Il 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: 5189323
    Abstract: An electrostatically operated micromotor is described that includes a rotor having first and second major surfaces, an axis of symmetry, and conductive portions. First and second annular, segmented torque stators are disposed adjacent the first and second major surfaces of the rotor and a bearing tethers the rotor to a support surface. Circuitry connects to each electrode of each torque stator for applying phased signals that induce a rotational force in the rotor. Such phased signals applied to electrodes of the first torque stator differ in potential from phased signals applied to electrodes of the second torque stator, so as to electrostatically balance the rotor, whereby net forces exerted by the rotor on the bearing in the direction of the axis of symmetry are lessened.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: February 23, 1993
    Assignee: The Trustees of Princeton University
    Inventors: Willian N. Carr, Hong Yu, Dan C. Dong-Il