Patents by Inventor Katsuhiko Hirogami

Katsuhiko Hirogami 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 preventing oxidation during water quenching of steel strip
    Patent number: 4052235
    Abstract: In a continuous annealing operation of a cold rolled steel strip involving water quenching and over-aging treatments, a method employing a cooling system comprising a pair of rolls arranged to contact the surfaces of a steel strip, a pair of cooling water spray units arranged in symmetrical positions on both sides of the steel strip and a storage tank connected to the spray units. When the steel strip, heated to a temperature between 500.degree. to 800.degree. C is water quenched, the distortion of the strip during the water quenching is inhibited and the surface oxidation is reduced to such an extent that no supplementary pickling is required.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: October 4, 1977
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Kazuhide Nakaoka, Kenji Araki, Yoshikazu Takada, Shinobu Osaka, Katsuhiko Hirogami