Patents by Inventor Hisao Fujihashi

Hisao Fujihashi 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).

  • Geothermal turbine
    Publication number: 20070224037
    Abstract: A geothermal turbine comprises a turbine casing, a turbine rotor shaft, a plurality of nozzle diaphragm outer rings fixed to the turbine casing, a plurality of nozzle diaphragm inner rings located radially inside the nozzle diaphragm outer rings, a plurality of nozzles placed between the nozzle diaphragm outer rings and the nozzle diaphragm inner rings, which form a steam passage, a plurality of rotor blades mounted on the turbine rotor shaft, which face the nozzles and form a blade cascade in a circumferential direction, a shroud arranged on tip of the rotor blade, an overhang attached to the nozzle diaphragm outer ring, which extends downstream of the nozzles and has an inner surface facing radially outside the shroud, and a plurality of sealing fins which protrude radially outward from the shroud and face the overhang.
    Type: Application
    Filed: December 21, 2006
    Publication date: September 27, 2007
    Inventors: Atsuhide Suzuki, Toshihiro Fujiwara, Masataka Fukuda, Kazuaki Ikeda, Toshihiro Matsuura, Osamu Watanabe, Hisao Fujihashi, Kentaro Takagi
  • Geothermal turbine
    Patent number: 7165943
    Abstract: A geothermal turbine comprises a turbine casing, a turbine rotor shaft, a plurality of nozzle diaphragm outer rings fixed to the turbine casing, a plurality of nozzle diaphragm inner rings located radially inside the nozzle diaphragm outer rings, a plurality of nozzles placed between the nozzle diaphragm outer rings and the nozzle diaphragm inner rings, which form a steam passage, a plurality of rotor blades mounted on the turbine rotor shaft, which face the nozzles and form a blade cascade in a circumferential direction, a shroud arranged on tip of the rotor blade, an overhang attached to the nozzle diaphragm outer ring, which extends downstream of the nozzles and has an inner surface facing radially outside the shroud, and a plurality of sealing fins which protrude radially outward from the shroud and face the overhang.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: January 23, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsuhide Suzuki, Toshihiro Fujiwara, Masataka Fukuda, Kazuaki Ikeda, Toshihiro Matsuura, Osamu Watanabe, Hisao Fujihashi, Kentaro Takagi
  • Geothermal turbine
    Patent number: 6860718
    Abstract: A geothermal turbine comprises a turbine casing, a turbine rotor shaft, a plurality of nozzle diaphragm outer rings fixed to the turbine casing, a plurality of nozzle diaphragm inner rings located radially inside the nozzle diaphragm outer rings, a plurality of nozzles placed between the nozzle diaphragm outer rings and the nozzle diaphragm inner rings, which form a steam passage, a plurality of rotor blades mounted on the turbine rotor shaft, which face the nozzles and form a blade cascade in a circumferential direction, a shroud arranged on tip of the rotor blade, an overhang attached to the nozzle diaphragm outer ring, which extends downstream of the nozzles and has an inner surface facing radially outside the shroud, and a plurality of sealing fins which protrude radially outward from the shroud and face the overhang.
    Type: Grant
    Filed: January 27, 2003
    Date of Patent: March 1, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsuhide Suzuki, Toshihiro Fujiwara, Masataka Fukuda, Kazuaki Ikeda, Toshihiro Matsuura, Osamu Watanabe, Hisao Fujihashi, Kentaro Takagi
  • Geothermal turbine
    Publication number: 20050025617
    Abstract: A geothermal turbine comprises a turbine casing, a turbine rotor shaft, a plurality of nozzle diaphragm outer rings fixed to the turbine casing, a plurality of nozzle diaphragm inner rings located radially inside the nozzle diaphragm outer rings, a plurality of nozzles placed between the nozzle diaphragm outer rings and the nozzle diaphragm inner rings, which form a steam passage, a plurality of rotor blades mounted on the turbine rotor shaft, which face the nozzles and form a blade cascade in a circumferential direction, a shroud arranged on tip of the rotor blade, an overhang attached to the nozzle diaphragm outer ring, which extends downstream of the nozzles and has an inner surface facing radially outside the shroud, and a plurality of sealing fins which protrude radially outward from the shroud and face the overhang.
    Type: Application
    Filed: August 30, 2004
    Publication date: February 3, 2005
    Inventors: Atsuhide Suzuki, Toshihiro Fujiwara, Masataka Fukuda, Kazuaki Ikeda, Toshihiro Matsuura, Osamu Watanabe, Hisao Fujihashi, Kentaro Takagi
  • Geothermal turbine
    Publication number: 20030165382
    Abstract: A geothermal turbine comprises a turbine casing, a turbine rotor shaft, a plurality of nozzle diaphragm outer rings fixed to the turbine casing, a plurality of nozzle diaphragm inner rings located radially inside the nozzle diaphragm outer rings, a plurality of nozzles placed between the nozzle diaphragm outer rings and the nozzle diaphragm inner rings, which form a steam passage, a plurality of rotor blades mounted on the turbine rotor shaft, which face the nozzles and form a blade cascade in a circumferential direction, a shroud arranged on tip of the rotor blade, an overhang attached to the nozzle diaphragm outer ring, which extends downstream of the nozzles and has an inner surface facing radially outside the shroud, and a plurality of sealing fins which protrude radially outward from the shroud and face the overhang.
    Type: Application
    Filed: January 27, 2003
    Publication date: September 4, 2003
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Atsuhide Suzuki, Toshihiro Fujiwara, Masataka Fukuda, Kazuaki Ikeda, Toshihiro Matsuura, Osamu Watanabe, Hisao Fujihashi, Kentaro Takagi