Patents by Inventor Yuuichi Motora

Yuuichi Motora 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).

  • Reactor bottom repairing method
    Patent number: 9136026
    Abstract: A heating laser beam is emitted to a cracked portion to remove moisture from the cracked portion, and subsequently, a welding laser beam is emitted to the cracked portion to heat and melt the cracked portion. The heating laser beam and the welding laser beam are emitted to an entire surface of the cylindrical body inside the reactor such as a stub tube penetrating through and fixed to a reactor bottom portion and a crack of the welded portion between the cylindrical body and the reactor bottom portion to thereby prevent a new crack from occurring and reactor water from leaking.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: September 15, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshio Hamamoto, Yuuichi Motora, Hiromi Kato, Masahiro Takeuchi, Masataka Tamura, Satoshi Okada, Taiji Kobayashi, Masaki Yoda, Hiroyuki Miyasaka, Wataru Kono, Masakazu Abura
  • REACTOR BOTTOM REPAIRING METHOD
    Publication number: 20110274229
    Abstract: A heating laser beam is emitted to a cracked portion to remove moisture from the cracked portion, and subsequently, a welding laser beam is emitted to the cracked portion to heat and melt the cracked portion. The heating laser beam and the welding laser beam are emitted to an entire surface of the cylindrical body inside the reactor such as a stub tube penetrating through and fixed to a reactor bottom portion and a crack of the welded portion between the cylindrical body and the reactor bottom portion to thereby prevent a new crack from occurring and reactor water from leaking.
    Type: Application
    Filed: October 2, 2009
    Publication date: November 10, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshio Hamamoto, Yuuichi Motora, Hiromi Kato, Masahiro Takeuchi, Masataka Tamura, Satoshi Okada, Taiji Kobayashi, Masaki Yoda, Hiroyuki Miyasaka, Wataru Kono, Masakazu Abura
  • Underwater laser processing apparatus and underwater laser processing method
    Patent number: 7759601
    Abstract: An underwater laser processing apparatus includes an optical unit and a nozzle. The optical unit irradiates a condensed laser beam generated by a YAG laser source to a certain point on a underwater workpiece. The nozzle has a gas exit for supplying a gas to the certain point. In the nozzle, an area surrounding the gas exit extends to the surface of the workpiece. This area keeps the supplied gas between the nozzle and the workpiece to improve the underwater laser process.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: July 20, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masataka Tamura, Seiichiro Kimura, Yuuichi Motora, Hidenori Takahashi
  • Underwater laser processing apparatus and underwater laser processing method
    Patent number: 6946618
    Abstract: An underwater laser processing apparatus includes an optical unit and a nozzle. The optical unit irradiates a condensed laser beam generated by a YAG laser oscillator to a certain point on a underwater workpiece. The nozzle has a gas exit for supplying a gas to the certain point. In the nozzle, an area surrounding the gas exit extends to the surface of the workpiece. This area keeps the supplied gas between the nozzle and the workpiece to improve the underwater laser process.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: September 20, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masataka Tamura, Seiichiro Kimura, Yuuichi Motora, Hidenori Takahashi
  • Underwater laser processing apparatus and underwater laser processing method
    Publication number: 20040149707
    Abstract: An underwater laser processing apparatus includes an optical unit and a nozzle. The optical unit irradiates a condensed laser beam generated by a YAG laser source to a certain point on a underwater workpiece. The nozzle has a gas exit for supplying a gas to the certain point. In the nozzle, an area surrounding the gas exit extends to the surface of the workpiece. This area keeps the supplied gas between the nozzle and the workpiece to improve the underwater laser process.
    Type: Application
    Filed: January 26, 2004
    Publication date: August 5, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Masataka Tamura, Seiichiro Kimura, Yuuichi Motora, Hidenori Takahashi
  • Undewater laser processing apparatus and underwater laser processing method
    Publication number: 20020036190
    Abstract: An underwater laser processing apparatus includes an optical unit and a nozzle. The optical unit irradiates a condensed laser beam generated by a YAG laser oscillator to a certain point on a underwater workpiece. The nozzle has a gas exit for supplying a gas to the certain point. In the nozzle, an area surrounding the gas exit extends to the surface of the workpiece. This area keeps the supplied gas between the nozzle and the workpiece to improve the underwater laser process.
    Type: Application
    Filed: September 28, 2001
    Publication date: March 28, 2002
    Inventors: Masataka Tamura, Seiichiro Kimura, Yuuichi Motora, Hidenori Takahashi