Patents by Inventor Hidetoshi Yuyama

Hidetoshi Yuyama 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).

  • Injection apparatus and injection control method for high-speed thin plate continuous casting machine
    Patent number: 5027885
    Abstract: An injection apparatus for a high-speed type thin plate continuous casting machine comprises linear motors (3A, 3B) interposing long sides of a flat nozzle (3), a power source unit for applying predetermined currents having a predetermined frequency to the linear motors (3A, 3B), and linear motor power factor improving capacitors (21) connected between the linear motors (3A, 3B) and the power source unit. A material on the inner walls of the short sides of the flat nozzle (3) is a conductive material to improve an edge effect, additionally, the apparatus is constructed to use a heating operation of the linear motor in heating the nozzle or a molten metal in the nozzle by adequately controlling a frequency or a current of a power supplied to the linear motors.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: July 2, 1991
    Assignee: Nippon-Steel Corporation
    Inventors: Keisuke Fujisake, Hideyuki Misumi, Junichi Nakagawa, Akira Hashimoto, Hidetoshi Yuyama, Noriyuki Kanai, Katsuhiro Maeda, Tsuyoshi Okada, Azumi Inaba, Shigeki Kashio, Atsuhiro Tokuda, Shiro Sukenari, Michiaki Kikunaga
  • Process for preparation of a casting having MnS dispersed and uniformly and finely precipitated therein
    Patent number: 4979558
    Abstract: MnS is finely dispersed and precipitated in a steel, and the steel obtained has highly improved characteristics such as HAZ toughness, cold cracking resistance, and corrosion resistance. This steel is obtained by continuously casting a component-adjusted molten steel having a dissolved oxygen concentration of 20 to 60 ppm and containing 0.01 to 0.05% by weight of a deoxidizing element, at a specific cooling rate.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: December 25, 1990
    Assignee: Nippon Steel Corporation
    Inventors: Takashi Sawai, Hidetoshi Yuyama, Yoshiyuki Ueshima, Shozo Mizoguchi