Patents by Inventor Akihiro TAKAKUWA

Akihiro TAKAKUWA 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).

  • Ni-base alloy for turbine rotor of steam turbine and turbine rotor of steam turbine
    Patent number: 8828313
    Abstract: An Ni-base alloy for a turbine rotor of a steam turbine contains in percent by weight C: 0.01 to 0.15, Cr: 15 to 28, Co: 10 to 15, Mo: 8 to 12, Al: 1.5 to 2, Ti: 0.1 to 0.6, B: 0.001 to 0.006, Re: 0.5 to 3, and the balance of Ni and unavoidable impurities.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: September 9, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kuniyoshi Nemoto, Kiyoshi Imai, Yomei Yoshioka, Masayuki Yamada, Reki Takaku, Shigekazu Miyashita, Takeo Suga, Takeo Takahashi, Kenichi Okuno, Akihiro Takakuwa
  • NI-BASE ALLOY FOR TURBINE ROTOR OF STEAM TURBINE AND TURBINE ROTOR OF STEAM TURBINE
    Publication number: 20090285692
    Abstract: An Ni-base alloy for a turbine rotor of a steam turbine contains in percent by weight C: 0.01 to 0.15, Cr: 15 to 28, Co: 10 to 15, Mo: 8 to 12, Al: 1.5 to 2, Ti: 0.1 to 0.6, B: 0.001 to 0.006, Re: 0.5 to 3, and the balance of Ni and unavoidable impurities.
    Type: Application
    Filed: March 13, 2009
    Publication date: November 19, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kuniyoshi NEMOTO, Kiyoshi IMAI, Yomei YOSHIOKA, Masayuki YAMADA, Reki TAKAKU, Shigekazu MIYASHITA, Takeo SUGA, Takeo TAKAHASHI, Kenichi OKUNO, Akihiro TAKAKUWA
  • NICKEL-BASED ALLOY FOR TURBINE ROTOR OF STEAM TURBINE AND TURBINE ROTOR OF STEAM TURBINE
    Publication number: 20090074584
    Abstract: A Nickel-based alloy for a turbine rotor of a steam turbine contains C: 0.01 to 0.15, Cr: 18 to 28, Co: 10 to 15, Mo: 8 to 12, Al: 1.5 to 2, Ti: 0.1 to 0.6, B: 0.001 to 0.006, Ta: 0.1 to 0.7 in % by weight, and the remaining portion is composed of Ni and unavoidable impurities. The Nickel-based alloy is composed of the above-stated chemical composition range, and thereby, a mechanical strength improves while maintaining forgeability as same as a conventional steel.
    Type: Application
    Filed: September 15, 2008
    Publication date: March 19, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kuniyoshi Nemoto, Kiyoshi Imai, Yomei Yoshioka, Masayuki Yamada, Reki Takaku, Takeo Suga, Masafumi Fukuda, Kenichi Okuno, Akihiro Takakuwa