Patents by Inventor Ichiro Nakauchi

Ichiro Nakauchi 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 for manufacturing a high strength rail with good toughness
    Patent number: 4933024
    Abstract: A method for manufacturing a high strength rail with good toughness, comprises cooling a rail to Ar.sub.3 transformation point or less after hot rolling; heating said cooled rail at a temperature of an austenite temperature zone ranging from Ac.sub.3 transformation point to 950.degree. C.; and cooling the heated rail. The chemical composition of the rail consists of 0.50 to 0.85 wt. % C, 0.50 to 1.50 wt. % Mn, 0.035 wt. % S or less, 0.10 to 1.00 wt. % Si, 0.035 wt. % P or less, 0.050 wt. % Al or less and the balance of Fe and inevitable impurities.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: June 12, 1990
    Assignee: NKK Corporation
    Inventors: Kozo Fukuda, Tsunemi Wada, Ichiro Nakauchi, Shinichi Nagahashi, Yoshio Saito, Kiyotaka Morioka, Yuzuru Kataoka, Yuzu Kato, Toyokazu Teramoto, Akio Fujibayashi