Patents by Inventor Kazumi Isaka

Kazumi Isaka 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).

  • Hearth roller with suppressed heat crown
    Patent number: 5547450
    Abstract: A hearth roller has an outer sleeve which constitutes a hearth roller barrel is disclosed. An inner sleeve is fitted into the outer sleeve and innermost sleeve is fitted into the inner sleeve. The ends of the inner sleeve in the axial direction are positioned inwardly and separated from each of the ends of the outer sleeve and are sealed by a metal. The inner sleeve has substantially the same linear expansion coefficient as the outer sleeve but exhibits higher thermal conductivity.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: August 20, 1996
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yoshiro Matsumoto, Kazumi Isaka, Masaaki Mizuguchi, Yoshimitsu Oshima, Osamu Takatsu
  • Butt welding method
    Patent number: 4912295
    Abstract: A butt welding method is disclosed, which comprises abutting a pair of steel sheets and welding the abutting surfaces by opposing electrodes while preventing gaps from developing between the widthwise outer portions of said steel sheets by suppressing rotational deformation of the abutting surfaces in the widthwise outer portions thereof.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: March 27, 1990
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Kazushige Arimochi, Kazumi Isaka, Takao Taka