Patents by Inventor Akihiko Kishikawa

Akihiko Kishikawa 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).

  • Superconducting magnet apparatus for magnetically levitated train
    Patent number: 5432669
    Abstract: A superconducting magnet apparatus according to the present invention has serially connected superconducting magnets, which are energized and de-energized via disconnectors from a power supply installed on a vehicle of the train, mounted in a pair on both sides of a magnetically levitated train that oppose guiding ground coils of a magnetically levitated railway when the magnetically levitated train is traveling, each superconducting magnet has a plurality of serially connected superconducting coils, persistent current switches are parallel-connected across respective ones of the superconducting coils, and demagnetizers are provided for linking and changing over corresponding persistent current switches mounted in pairs on both sides of the magnetically levitated train.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: July 11, 1995
    Assignee: Railway Technical Research Institute
    Inventors: Kaoru Nemoto, Hiroki Kamijo, Akihiko Kishikawa, Eiji Suzuki