Patents by Inventor Howard T. Coffey

Howard T. Coffey 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
  • Patent number: 5253592
    Abstract: A propulsion and suspension system for an inductive repulsion type magnetically levitated vehicle which is propelled and suspended by a system which includes propulsion windings which form a linear synchronous motor and conductive guideways, adjacent to the propulsion windings, where both combine to partially encircling the vehicle-borne superconducting magnets. A three phase power source is used with the linear synchronous motor to produce a traveling magnetic wave which in conjunction with the magnets propel the vehicle. The conductive guideway combines with the superconducting magnets to provide for vehicle leviation.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: October 19, 1993
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Howard T. Coffey
  • Patent number: 5222436
    Abstract: A propulsion and stabilization system for an inductive repulsion type magnetically levitated vehicle which is propelled and stabilized by a system which includes propulsion windings mounted above and parallel to vehicle-borne suspension magnets. A linear synchronous motor is part of the vehicle guideway and is mounted above and parallel to superconducting magnets attached to the magnetically levitated vehicle.
    Type: Grant
    Filed: July 28, 1992
    Date of Patent: June 29, 1993
    Assignee: United States Department of Energy
    Inventor: Howard T. Coffey