Patents by Inventor Koji Okimura
Koji Okimura 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).
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Patent number: 10134494Abstract: In an installation device of a reactor repair device and a method, an installation pole (111) connected with an upper portion of a water jet peening device (101), a lifting device (112) that can suspend and support an upper portion of the installation pole (111) and can lift the installation pole (111) from a work floor (121), a moving device (113) that can move the lifting device (112) in two directions intersecting in a horizontal direction, and a position adjustment device (114) that can move the installation pole (111) in the horizontal direction in a state where the installation pole (111) is supported by the lifting device (112).Type: GrantFiled: January 27, 2014Date of Patent: November 20, 2018Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akio Minamiyama, Yutaka Nishitsuji, Koji Okimura, Kazuyuki Hinami, Tomochika Hamamoto, Takao Konno
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Patent number: 9728285Abstract: Provided is a water jet peening apparatus and a water jet peening method including: a clamping cylinder (201) which is able to be disposed at the outer peripheral side of an instrumentation nozzle (83) with a predetermined gap therebetween; a clamping piece (210) which is able to fix the clamping cylinder (201) to the instrumentation nozzle (83); a nozzle guide (221) which has a cylindrical shape, is provided inside the clamping cylinder (201), and is positioned to a position adjacent to the upper end of the instrumentation nozzle (83); an inner surface WJP nozzle (105) which is movable upward and downward inside the nozzle guide (221); and a drainage hole (224) which radially penetrates the nozzle guide (221). Accordingly, it is possible to improve the safety of the operation by preventing a thimble tube from being popped out due to a water jet peening operation.Type: GrantFiled: January 23, 2014Date of Patent: August 8, 2017Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akio Minamiyama, Yutaka Nishitsuji, Koji Okimura, Kazuyuki Hinami, Tomochika Hamamoto, Takao Konno
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Publication number: 20150364224Abstract: In an installation device of a reactor repair device and a method, an installation pole (111) connected with an upper portion of a water jet peening device (101), a lifting device (112) that can suspend and support an upper portion of the installation pole (111) and can lift the installation pole (111) from a work floor (121), a moving device (113) that can move the lifting device (112) in two directions intersecting in a horizontal direction, and a position adjustment device (114) that can move the installation pole (111) in the horizontal direction in a state where the installation pole (111) is supported by the lifting device (112).Type: ApplicationFiled: January 27, 2014Publication date: December 17, 2015Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akio Minamiyama, Yutaka Nishitsuji, Koji Okimura, Kazuyuki Hinami, Tomochika Hamamoto, Takao Konno
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Publication number: 20150348659Abstract: Provided is a water jet peening apparatus and a water jet peening method including: a clamping cylinder (201) which is able to be disposed at the outer peripheral side of an instrumentation nozzle (83) with a predetermined gap therebetween; a clamping piece (210) which is able to fix the clamping cylinder (201) to the instrumentation nozzle (83); a nozzle guide (221) which has a cylindrical shape, is provided inside the clamping cylinder (201), and is positioned to a position adjacent to the upper end of the instrumentation nozzle (83); an inner surface WJP nozzle (105) which is movable upward and downward inside the nozzle guide (221); and a drainage hole (224) which radially penetrates the nozzle guide (221). Accordingly, it is possible to improve the safety of the operation by preventing a thimble tube from being popped out due to a water jet peening operation.Type: ApplicationFiled: January 23, 2014Publication date: December 3, 2015Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akio Minamiyama, Yutaka Nishitsuji, Koji Okimura, Kazuyuki Hinami, Tomochika Hamamoto, Takao Konno
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Patent number: 8867688Abstract: [Problem] To facilitate mounting of a nozzle. [Solving Means] In a nozzle mounting structure for mounting a nozzle 20 penetrating through a reactor vessel 10 having a hemispherical concave inner surface, the nozzle mounting structure includes a removed concave portion 17 in which a base material 12 on an inner surface side of the reactor vessel 10 is removed in a symmetrical shape around a normal line N on the hemispherical concave inner surface of the reactor vessel 10, a flange 25 provided on the nozzle 20, formed in a same symmetrical shape as that of the removed concave portion 17 around the normal line N, and inserted into the removed concave portion 17, and a weld part 18 provided around the normal line N for welding the flange 25 to the reactor vessel 10.Type: GrantFiled: January 18, 2011Date of Patent: October 21, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Nobuyuki Hori, Ryuichi Narita, Moritatsu Nishimura, Harutaka Suzuki, Koji Okimura
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Patent number: 8637784Abstract: An object is to provide a method and an apparatus for improving a residual stress in a tubular body, which are enabled to improve the residual stress reliably by clearly defining controlling rage for treatment conditions without depending on an installation state and configuration of the tubular body. When a cylindrical tubular body (2) is improved in its residual stress by locally irradiating an outer-circumferential surface of a welded portion (C) of the tubular body (2) with laser beams (5a) and by moving an irradiation area (s) in an circumferential direction, a plurality thermocouples (9) are installed on the tubular body (2) to be improved, a temperature history of the outer surface of the tubular body (2) by the irradiation of the laser beam (5a) is managed by measuring the temperature history itself.Type: GrantFiled: January 11, 2008Date of Patent: January 28, 2014Assignees: Mitsubishi Heavy Industries, Ltd., The Japan Atomic Power Company, Hokkaido Electric Power Company, Inc., Tohoku Electric Power Co., Inc, The Tokyo Electric Power Co., Inc, Chubu Electric Power Co., Inc, Hokuriku Electric Power Company, The Kansai Electric Power Co., Inc, The Chugoku Electric Power Co., Inc, Shikoku Electric Power Co., Inc, Kyushu Electric Power Co., Inc, Electric Power Development Co., LtdInventors: Takahiro Ota, Kazuhiko Kamo, Itaru Muroya, Seiji Asada, Kazuhiro Wakabayashi, Koji Okimura, Hironori Onitsuka
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Publication number: 20110194663Abstract: [Problem] To facilitate mounting of a nozzle. [Solving Means] In a nozzle mounting structure for mounting a nozzle 20 penetrating through a reactor vessel 10 having a hemispherical concave inner surface, the nozzle mounting structure includes a removed concave portion 17 in which a base material 12 on an inner surface side of the reactor vessel 10 is removed in a symmetrical shape around a normal line N on the hemispherical concave inner surface of the reactor vessel 10, a flange 25 provided on the nozzle 20, formed in a same symmetrical shape as that of the removed concave portion 17 around the normal line N, and inserted into the removed concave portion 17, and a weld part 18 provided around the normal line N for welding the flange 25 to the reactor vessel 10.Type: ApplicationFiled: January 18, 2011Publication date: August 11, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Nobuyuki Hori, Ryuichi Narita, Moritatsu Nishimura, Harutaka Suzuki, Koji Okimura
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Publication number: 20100326974Abstract: An object is to provide a method and an apparatus for improving a residual stress in a tubular body, which are enabled to improve the residual stress reliably by clearly defining controlling rage for treatment conditions without depending on an installation state and configuration of the tubular body. When a cylindrical tubular body (2) is improved in its residual stress by locally irradiating an outer-circumferential surface of a welded portion (C) of the tubular body (2) with laser beams (5a) and by moving an irradiation area (s) in an circumferential direction, a plurality thermocouples (9) are installed on the tubular body (2) to be improved, a temperature history of the outer surface of the tubular body (2) by the irradiation of the laser beam (5a) is managed by measuring the temperature history itself.Type: ApplicationFiled: January 11, 2008Publication date: December 30, 2010Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., THE JAPAN ATOMIC POWER COMPANY, HOKKAIDO ELECTRIC POWER COMPANY, INCORPORATED, TOHOKU ELECTRIC POWER CO., INC., THE TOKYO ELECTRIC POWER COMPANY, INC., CHUBU ELECTRIC POWER CO., INC., HOKURIKU ELECTRIC POWER COMPANY, THE KANSAI ELECTRIC POWER CO., INC., THE CHUGOKU ELECTRIC POWER CO., INC., SHIKOKU ELECTRIC POWER CO., INC., KYUSHU ELECTRIC POWER CO., INC., ELECTRIC POWER DEVELOPMENT CO., LTD.Inventors: Takahiro Ota, Kazuhiko Kamo, Itaru Muroya, Seiji Asada, Kazuhiro Wakabayashi, Koji Okimura, Hironori Onitsuka
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Patent number: 6417487Abstract: A laser beam machining head includes a dividing optical system for dividing laser light into two separate laser beams, and providing spacing therebetween; a condensing optical system for condensing the separate laser beams into condensed laser light, and projecting it onto a cutting site of an object to be cut; and an inner assist gas nozzle placed between the separate laser beams, a width of an opening of a tip portion of the inner assist gas nozzle being nearly equal to a cutting width. Or the tip opening of the inner assist gas nozzle is slender; or its tip side is inclined, and the angle of inclination is variable; or the relative positions of the inner assist gas nozzle and a workpiece, or the relative positions of the focal position of the condensing optical system and the workpiece are variable independently; or an outer assist gas nozzle surrounding the separate laser beams is provided.Type: GrantFiled: August 3, 2001Date of Patent: July 9, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yasumi Nagura, Michisuke Nayama, Takashi Ishide, Yoshio Hashimoto, Yukio Michishita, Koji Okimura
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Publication number: 20020017513Abstract: A laser beam machining head includes a dividing optical system for dividing laser light into two separate laser beams, and providing spacing therebetween; a condensing optical system for condensing the separate laser beams into condensed laser light, and projecting it onto a cutting site of an object to be cut; and an inner assist gas nozzle placed between the separate laser beams, a width of an opening of a tip portion of the inner assist gas nozzle being nearly equal to a cutting width. Or the tip opening of the inner assist gas nozzle is slender; or its tip side is inclined, and the angle of inclination is variable; or the relative positions of the inner assist gas nozzle and a workpiece, or the relative positions of the focal position of the condensing optical system and the workpiece are variable independently; or an outer assist gas nozzle surrounding the separate laser beams is provided.Type: ApplicationFiled: August 3, 2001Publication date: February 14, 2002Applicant: MITSUBISHI HEABY INDUSTRIES, LTD.Inventors: Yasumi Nagura, Michisuke Nayama, Takashi Ishide, Yoshio Hashimoto, Yukio Michishita, Koji Okimura, Tadashi Nagashima, Masao Watanabe, Takashi Akaba, Katsusuke Shimizu
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Patent number: 6294754Abstract: In a laser beam machine head, when a filler wire and an optical axis of a laser beam are arranged coaxially, a convex roof mirror and a concave roof mirror are combined to divide the laser beam into two separate laser beams to that no laser beam is projected onto a filler wire feed pipe. Furthermore, the filler wire is fed from outside the laser beams to a condensing position via a filler wire guide in the spacing between the separate laser beams, or an electrode supported by a water flow pipe or an electrode holding pipe is brought close to the condensing position.Type: GrantFiled: October 29, 1999Date of Patent: September 25, 2001Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yasumi Nagura, Michisuke Nayama, Takashi Ishide, Yoshio Hashimoto, Yukio Michishita, Koji Okimura, Tadashi Nagashima, Masao Watanabe, Takashi Akaba, Katsusuke Shimizu