Patents by Inventor Tosiaki Saito

Tosiaki Saito 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).

  • Gas turbine, gas turbine blade used therefor and manufacturing method for gas turbine blade
    Patent number: 5620308
    Abstract: A heavy-duty gas turbine includes a compressor; a combustion liner; a turbine blade in a single stage or multi-stages; and a turbine nozzle provided in correspondence to the turbine blade. The turbine blade has a dovetail secured to a turbine disk and has an overall length of not less than 180 mm, and it is made of a single-crystal Ni-base alloy whose .gamma. phase is a single crystal. Operating gas temperature is not less than 1400.degree. C., and metal temperature of a first blade is not less than 1000.degree. C. under working stress.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 15, 1997
    Assignees: Hitachi, Ltd., Tohoku Electric Power Co., Inc.
    Inventors: Akira Yoshinari, Tosiaki Saito, Katsumi Iijima, Tadami Ishida, Ryozo Hashida, Kimio Kano
  • Blade for gas turbine
    Patent number: 5611670
    Abstract: A gas-turbine moving blade made of a Ni-base superalloy containing less grain boundary strengthening elements, in which a blade portion is formed of a single crystal and the rest is formed of columnar crystals, and a gas turbine including the moving blade. A thermal efficiency of the gas turbine can be improved to 35% or more, and a thermal efficiency of complex power generation with a steam turbine can be improved to 45% or more.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: March 18, 1997
    Assignees: Hitachi, Ltd., Tohoku Electric Power Co., Inc.
    Inventors: Akira Yoshinari, Hideki Tamaki, Tosiaki Saito, Mitsuru Kobayashi, Katsumi Iijima, Katsuo Wada, Kimio Kano, Hiroyuki Matsuzaki
  • Gas turbine, gas turbine blade used therefor and manufacturing method for gas turbine blade
    Patent number: 5489194
    Abstract: A heavy-duty gas turbine includes a compressor; a combustion liner; a turbine blade in a single stage or multi-stages; and a turbine nozzle provided in correspondence to the turbine blade. The turbine blade has a dovetail secured to a turbine disk and has an overall length of not less than 180 mm, and it is made of a single-crystal Ni-base alloy whose .gamma. phase is a single crystal. Operating gas temperature is not less than 1400.degree. C., and metal temperature of a first blade is not less than 1000.degree. C. under working stress.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: February 6, 1996
    Assignees: Hitachi, Ltd., Tohoku Electric Power Co., Inc.
    Inventors: Akira Yoshinari, Tosiaki Saito, Katsumi Iijima, Tadami Ishida, Ryozo Hashida, Kimio Kano
  • Door closer
    Patent number: D295367
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: April 26, 1988
    Assignee: Ryobi Ltd.
    Inventors: Yasunori Ishizuka, Tosiaki Saito