Patents by Inventor Yigang Cal

Yigang Cal 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: 5586504
    Abstract: A propulsion and stabilization system with a plurality of superconducting magnetic devices affixed to the dual-keels of a vehicle, where the superconducting magnetic devices produce a magnetic field when energized. The system also includes a plurality of figure-eight shaped null-flux coils affixed to opposing vertical sides of slots in a guideway. The figure-eight shaped null-flux coils are vertically oriented, laterally cross-connected in parallel, longitudinally connected in series, and continue the length of the vertical slots providing levitation and guidance force. An external power source energizes the figure-eight shaped null-flux coils to create a magnetic traveling wave that interacts with the magnetic field produced by the superconducting magnets to impart motion to the vehicle.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: December 24, 1996
    Assignee: The United States of America as represented by The United States Department of Energy
    Inventors: Jianliang He, Zian Wang, Donald M. Rote, Howard T. Coffey, John R. Hull, Thomas M. Mulcahy, Yigang Cal