Patents by Inventor Yoshihiro Hanai

Yoshihiro Hanai 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).

  • Apparatus for preventing dust accumulation in exhaust duct of an electric furnace
    Patent number: 5394431
    Abstract: A smoke suction duct of an electric furnace is constructed as a separate member from other exhaust duct portions and other devices and is supported to be rotatable about an axis of the duct. Further, the smoke suction duct is either alternately turned to right and left or continuously turned in one direction by a duct turning device. Since accumulating dust is raised to an upper portion of the smoke suction duct where an exhaust gas flow has a high velocity due to rotation of the smoke suction duct and is pushed toward a combustion tower by the exhaust gas flow, dust is advantageously prevented from accumulating on a bottom of the smoke suction duct.
    Type: Grant
    Filed: November 3, 1993
    Date of Patent: February 28, 1995
    Assignee: Topy Kogyo Kabushiki Kaisha
    Inventors: Yoriyuki Kuwahara, Hideki Terashima, Yoshiyasu Hikosaka, Yoshihiro Hanai, Mitsuyoshi Kishita