Patents by Inventor Hisao Kan

Hisao Kan 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).

  • Electromagnetic induction apparatus with cooling grooves
    Patent number: 4588972
    Abstract: A transformer has a vertical winding assembly formed of a stack of pancake coils sandwiched between electrically insulating bases each provided on its surface contacted by an associated one of pancake coils with a plurality of cooling grooves extending in spaced relationship along turns of a rectangular electrically conductive wire forming the pancake coil and opening on the upper and lower portions of the base. A liquid refrigerant sprinkled on the winding assembly is arranged to flow through the cooling grooves via the upper open ends and be discharged via the lower open ends.
    Type: Grant
    Filed: December 13, 1984
    Date of Patent: May 13, 1986
    Assignees: Yoshinobu Harumoto, Yoshio Yoshida, Yuichi Kabayama, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshinobu Harumoto, Yoshio Yoshida, Yuichi Kabayama, Hisao Kan, Tetsuro Hakata, Takahiro Matsumoto