Patents by Inventor Rokuro Kohno

Rokuro Kohno 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).

  • Method of continuous hot rolling and apparatus for welding steel bars thereof
    Patent number: 5994665
    Abstract: Sheet bars are effectively joined while they are traveling and subjected to continuous hot rolling without causing defects in quality and without requiring large expensive apparatus such as a swing roller etc.The present invention is to provide a continuous hot rolling method and apparatus in which the tail of a preceding sheet bar is butted to the top of a succeeding sheet bar between the rough and finishing mills on a continuous hot rolling line, and the butted portion is welded from the upper surface of the sheet bars by means of laser beam or plasma arc while the sheet bars are traveling.According to the present invention, it is possible to join sheet bars from the upper surface in a short period of time without stopping the sheet bars and without causing splashes and burrs, before the sheet bars are subjected to continuous finish rolling.
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: November 30, 1999
    Assignee: Nippon Steel Corporation
    Inventors: Shigeru Nishibayashi, Masahiro Ohara, Katsuhiro Minamida, Tadatsugu Yoshida, Rokuro Kohno, Atsushi Sugihashi
  • Apparatus for welding steel bars in a continuous hot rolling process
    Patent number: 5814787
    Abstract: Sheet bars are effectively joined while they are traveling and subjected to continuous hot rolling without causing defects in quality and without requiring large expensive apparatus such as a swing roller etc.The present invention is to provide a continuous hot rolling method and apparatus in which the tail of a preceding sheet bar is butted to the top of a succeeding sheet bar between the rough and finishing mills on a continuous hot rolling line, and the butted portion is welded from the upper surface of the sheet bars by means of laser beam or plasma arc while the sheet bars are traveling.According to the present invention, it is possible to join sheet bars from the upper surface in a short period of time without stopping the sheet bars and without causing splashes and burrs, before the sheet bars are subjected to continuous finish rolling.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: September 29, 1998
    Assignee: Nippon Steel Corporation
    Inventors: Shigeru Nishibayashi, Masahiro Ohara, Katsuhiro Minamida, Tadatsugu Yoshida, Rokuro Kohno, Atsushi Sugihashi