Patents by Inventor Shinichi Tsukizaki

Shinichi Tsukizaki 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).

  • DC arc furnace
    Patent number: 5479435
    Abstract: Provided are a furnace shell with a lower electrode at a bottom of the shell, a furnace roof adapted to close an upper portion of the furnace shell, a material charge port substantially at a center of the furnace roof and two upper electrodes positioned laterally opposite to each other with respect to the material charge port and vertically extending through the furnace roof. Scrap material is continuously charged through the material charge port and arcs are directed to the scrap material at a center of the furnace shell.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: December 26, 1995
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Hironobu Yoshida, Shinichi Tsukizaki