Patents by Inventor Kazuo Aoyagi

Kazuo Aoyagi 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).

  • Steam turbine and power generating equipment
    Patent number: 6790002
    Abstract: The present invention solves problems of securing high-temperature strength at elevated temperatures and of preventing steam leakage that arise when high-pressure, high-temperature steam is used for driving a steam turbine, and problems of preventing the occurrence of rubbing due to the suppression of the excessive elongation difference and of minimizing steam leakage from shaft seals. A double-wall casing structure is arranged at an area corresponding to stages from a high-pressure first stage (7) to a predetermined high-pressure stage arranged on an upstream side of a high-pressure final stage (8); and a single-wall casing structure is arranged at an area corresponding to stages which follows said predetermined high-pressure stage.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: September 14, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Morikazu Kitazawa, Masataka Kikuchi, Kazuo Aoyagi, Nobuo Okita, Hiroyuki Oohira
  • Steam turbine and power generating equipment
    Publication number: 20030143069
    Abstract: The present invention solves problems of securing high-temperature strength at elevated temperatures and of preventing steam leakage that arise when high-pressure, high-temperature steam is used for driving a steam turbine, and problems of preventing the occurrence of rubbing due to the suppression of the excessive elongation difference and of minimizing steam leakage from shaft seals. A double-wall casing structure is arranged at an area corresponding to stages from a high-pressure first stage (7) to a predetermined high-pressure stage arranged on an upstream side of a high-pressure final stage (8); and a single-wall casing structure is arranged at an area corresponding to stages which follows said predetermined high-pressure stage.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 31, 2003
    Inventors: Morikazu Kitazawa, Masataka Kikuchi, Kazuo Aoyagi, Nobuo Okita, Hiroyuki Oohira