Patents by Inventor Takeshi Maehara
Takeshi Maehara 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: 11939745Abstract: An electrically driven construction machine is provided in which, in a case where a plurality of electrically driven construction machines operate simultaneously, it is possible to avoid exceeding the allowable electric power that can be output by the electric power receiving facility of a commercial electric power supply. A controller computes an own demanded power Pd1 for driving the plurality of hydraulic actuators, on the basis of operation signals of the operation devices, computes an allowable power as a power limit value usable by the electric motor on the basis of the own demanded power, the demanded powers of the other electrically driven construction machines received through the communication device, and an allowable electric power of the electric power receiving facility of the commercial electric power supply, and controls the electric motor such that a power consumption of the electric motor does not exceed the allowable power.Type: GrantFiled: May 23, 2019Date of Patent: March 26, 2024Assignee: Hitachi Construction Machinery Tierra Co., Ltd.Inventors: Takeshi Ishii, Kiwamu Takahashi, Taihei Maehara, Tatsuo Takishita
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Patent number: 10317367Abstract: An eddy-current flaw detector includes a trace data calculator configured to calculate each coordinate with respect to flaw detection points on which an inspection probe is used upon performing an eddy-current testing based on an inputted condition of eddy-current flaw detection and surface shape data of an inspection-object surface measured by a profilometer, and to calculate a normal vector of each flaw detection point; a gap evaluation calculator configured to acquire an evaluation result on a gap between the inspection-object surface and the inspection probe for each flaw detection point; a flaw detection data collector configured to acquire flaw detection data of an inspection object for each flaw detection point; a flaw detection data analyzer configured to evaluate presence/absence of a flaw in the inspection-object surface based on the flaw detection data of the inspection object and the evaluation result on the gap for each flaw detection point.Type: GrantFiled: November 10, 2015Date of Patent: June 11, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Noriyasu Kobayashi, Souichi Ueno, Naotaka Suganuma, Tatsuya Oodake, Takeshi Maehara, Takashi Kasuya, Hiroya Ichikawa
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Patent number: 10245679Abstract: A laser welding head includes a shield gas injection nozzle and welding wire supply nozzle, wherein the shield gas injection nozzle and the welding wire supply nozzle include a main body section and a surface layer section that covers the main body section, and at least part of the surface layer section is formed by at least one of ultra-hard alloy, cermet and ceramics.Type: GrantFiled: March 31, 2016Date of Patent: April 2, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Taiji Kobayashi, Masataka Tamura, Takeshi Maehara, Osamu Yamaguchi
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Patent number: 10052717Abstract: An underwater welding apparatus includes: an underwater welding head provided underwater and having, at its leading end, a nozzle section from which laser light is emitted; a shied cover formed of an elastic member and provided around the nozzle section so as to form, at the leading end of the underwater welding head, a space where water is excluded by shield gas; and an expansion/contraction member having a discharge hole for discharging water and shield gas containing metal dust particles from an inside of the shield cover, the discharge hole being increased in diameter as pressure inside the shield cover rises, while being reduced in diameter as the pressure inside the shield cover falls.Type: GrantFiled: August 22, 2012Date of Patent: August 21, 2018Assignee: Kabushiki Kaisha ToshibaInventors: Tatsuya Ishigaki, Takuya Uehara, Yoshio Hamamoto, Osamu Yamaguchi, Takeshi Maehara, Hiromi Kato
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Publication number: 20170341177Abstract: In one embodiment, a laser peening apparatus includes an output unit (41) configured to output laser light (6); a light-guide unit (31) configured to guide the outputted laser light (6); a condenser lens (42) configured to condense the guided laser light (6); an irradiation nozzle (32) configured to radiate the condensed laser light (6); a focus-change unit (50) configured to change a focal position of the laser light (6) based on distance from an irradiation target (4, 5) of the laser light (6) to the irradiation nozzle (32); and a control unit (66) configured to apply laser peening by radiating the laser light (6) toward the irradiation target (4, 5) which is in contact with water.Type: ApplicationFiled: April 24, 2017Publication date: November 30, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kohei URAGUCHI, Takeshi MAEHARA, Osamu YAMAGUCHI, Masaki YODA, ltaru CHIDA
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Publication number: 20170336361Abstract: An eddy-current flaw detector includes a trace data calculator configured to calculate each coordinate with respect to flaw detection points on which an inspection probe is used upon performing an eddy-current testing based on an inputted condition of eddy-current flaw detection and surface shape data of an inspection-object surface measured by a profilometer, and to calculate a normal vector of each flaw detection point; a gap evaluation calculator configured to acquire an evaluation result on a gap between the inspection-object surface and the inspection probe for each flaw detection point; a flaw detection data collector configured to acquire flaw detection data of an inspection object for each flaw detection point; a flaw detection data analyzer configured to evaluate presence/absence of a flaw in the inspection-object surface based on the flaw detection data of the inspection object and the evaluation result on the gap for each flaw detection point.Type: ApplicationFiled: November 10, 2015Publication date: November 23, 2017Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Noriyasu KOBAYASHI, Souichi UENO, Naotaka SUGANUMA, Tatsuya OODAKE, Takeshi MAEHARA, Takashi KASUYA, Hiroya ICHIKAWA
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Patent number: 9662744Abstract: A laser irradiation device in which laser light is adjusted to create a laser beam, including a protective glass window arranged in an emission region that emits the laser beam; a reflection mechanism that passes the laser beam and reflects visible light; a wavelength-dependent optical screening mechanism that cuts off light of a wavelength region other than visible light from the light that is reflected by the reflection mechanism; image pickup camera configured to capture the visible light reflected with the reflection optical element; and an image adjustment lens unit that adjusts an image in the visible light that is input from the wavelength-dependent optical screening mechanism. The wavelength-dependent optical screening mechanism is provided between the reflection optical element and the image camera.Type: GrantFiled: April 16, 2014Date of Patent: May 30, 2017Assignee: Kabushiki Kaisha ToshibaInventors: Itaru Chida, Katsunori Shiihara, Yasuaki Tokunaga, Takeshi Maehara, Keiichi Hirota, Hiroya Ichikawa
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Publication number: 20160288260Abstract: A laser welding head includes a shield gas injection nozzle and welding wire supply nozzle, wherein the shield gas injection nozzle and the welding wire supply nozzle include a main body section and a surface layer section that covers the main body section, and at least part of the surface layer section is formed by at least one of ultra-hard alloy, cermet and ceramics.Type: ApplicationFiled: March 31, 2016Publication date: October 6, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Taiji KOBAYASHI, Masataka Tamura, Takeshi Maehara, Osamu Yamaguchi
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Publication number: 20140231394Abstract: An underwater welding apparatus includes: an underwater welding head provided underwater and having, at its leading end, a nozzle section from which laser light is emitted; a shied cover formed of an elastic member and provided around the nozzle section so as to form, at the leading end of the underwater welding head, a space where water is excluded by shield gas; and an expansion/contraction member having a discharge hole for discharging water and shield gas containing metal dust particles from an inside of the shield cover, the discharge hole being increased in diameter as pressure inside the shield cover rises, while being reduced in diameter as the pressure inside the shield cover falls.Type: ApplicationFiled: August 22, 2012Publication date: August 21, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Tatsuya Ishigaki, Takuya Uehara, Yoshio Hamamoto, Osamu Yamaguchi, Takeshi Maehara, Hiromi Kato
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Publication number: 20140224780Abstract: A laser irradiation device comprises a laser oscillator, a laser irradiation head that performs laser processing by directing the laser beam onto the region to be processed; and a transmission mechanism that gets the laser beam through emitted from the laser oscillator to the laser irradiation head. The laser irradiation head comprises: a laser beam adjustment unit that adjusts the laser light to create a laser beam; a protective glass window arranged in an emission region that emits the laser beam; a reflection mechanism that gets the laser beam through and reflects visible light; a wavelength-dependent optical screening mechanism that cuts off light of a wavelength region other than visible light from the light that is reflected by the reflection mechanism; an image adjustment lens unit that adjusts an image comprising visible light that is input from the wavelength-dependent optical screening mechanism; an image pickup camera that inputs an image; and an image processing mechanism that processes the image.Type: ApplicationFiled: April 16, 2014Publication date: August 14, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Itaru CHIDA, Katsunori SHIIHARA, Yasuaki TOKUNAGA, Takeshi MAEHARA, Keiichi HIROTA, Hiroya ICHIKAWA
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Patent number: 8608121Abstract: A reactor metering pipe fixing device fixes a reactor metering pipe disposed in a reactor to a cylindrical outer surface of a jet pump diffuser and reduces stress that may be induced in a weld zone in the reactor metering pipe. An outer holding member 41 is held on the cylindrical outer surface 18a of a jet pump diffuser 18 by a C-shaped holding member 30. The reactor metering pipe 19 is clamped from radial directions by the outer holding member 41 and inner holding members 42 and 43. Wedges 44 and 45 are wedged into a gap between the cylindrical outer surface 18a and the inner holding member 42 and a gap between the cylindrical outer surface 18a and the inner holding member 43 to fix the reactor metering pipe 19 firmly to the cylindrical outer surface 18a.Type: GrantFiled: July 3, 2008Date of Patent: December 17, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Takeshi Maehara, Hideshi Iwasa, Yuusuke Watanabe, Kunihiko Kinugasa, Hajime Mori, Kiyofumi Saiki, Ken Okuda, Tsuyoshi Hagiwara, Noboru Saito, Masanobu Watanabe, Shigeru Kasai
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Patent number: 8325872Abstract: A working apparatus has: a working equipment for doing works on a structure; a folding/unfolding mechanism for conveying the working equipment to the working position in a folded state; a conveyance mechanism (such as a horizontal thruster) for conveying the working equipment and the folding/unfolding mechanism to the working position; a pressing mechanism (such as a ballast tank) for pressing the working equipment against the lower surface of the structure; and a traveling mechanism including a wheel for traveling along the lower surface of the structure and positioning the apparatus.Type: GrantFiled: April 1, 2010Date of Patent: December 4, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Mitsuaki Shimamura, Takeshi Maehara, Ikuko Kameyama, Hiroyuki Adachi, Yasuhiro Yuguchi, Toru Taguchi
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Patent number: 8157922Abstract: An apparatus for processing an inside of a pipe which performs various works from an inside of a pipe, includes traveling drive units, a working device, rotation support mechanisms, a coupling mechanism, and suspension devices. The traveling drive units are inserted into the inside of the pipe, and the working device is moved in a circumferential direction along the inside of the pipe by the traveling drive units.Type: GrantFiled: March 21, 2008Date of Patent: April 17, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Mitsuaki Shimamura, Yutaka Togasawa, Takeshi Maehara, Yasuhiro Yuguchi
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Patent number: 8085296Abstract: A method of computing an operating position based on a relative distance between a monitor and a movable body correlating data is obtained in advance for determining a one to one correlation between the relative distance and dimensions on the surface of a photographed object of an image. A relative angle is measured between the photographed object and the monitor. The movable body is photographed using a camera of the monitor. The distance and dimensions between reference points on the image are compared with the correlating data coincident with the measured relative angle.Type: GrantFiled: September 5, 2006Date of Patent: December 27, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Yasuhiro Yuguchi, Koichi Soma, Takeshi Maehara, Ikuko Kameyama, Tetsuro Nakagawa, Hiroyuki Adachi
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Publication number: 20110292205Abstract: A method of computing an operating position based on a relative distance between a monitor and a movable body correlating data is obtained in advance for determining a one to one correlation between the relative distance and dimensions on the surface of a photographed object of an image. A relative angle is measured between the photographed object and the monitor. The movable body is photographed using a camera of the monitor. The distance and dimensions between reference points on the image are compared with the correlating data coincident with the measured relative angle.Type: ApplicationFiled: September 5, 2006Publication date: December 1, 2011Applicant: Kabushiki Kaisha ToshibaInventors: Yasuhiro Yuguchi, Koichi Soma, Takeshi Maehara, Ikuko Kameyama, Tetsuro Nakagawa, Hiroyuki Adachi
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Publication number: 20100232562Abstract: A working apparatus has: a working equipment for doing works on a structure; a folding/unfolding mechanism for conveying the working equipment to the working position in a folded state; a conveyance mechanism (such as a horizontal thruster) for conveying the working equipment and the folding/unfolding mechanism to the working position; a pressing mechanism (such as a ballast tank) for pressing the working equipment against the lower surface of the structure; and a traveling mechanism including a wheel for traveling along the lower surface of the structure and positioning the apparatus.Type: ApplicationFiled: April 1, 2010Publication date: September 16, 2010Inventors: Mitsuaki SHIMAMURA, Takeshi Maehara, Ikuko Kameyama, Hiroyuki Adachi, Yasuhiro Yuguchi, Toru Taguchi
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Patent number: 7720190Abstract: A working apparatus has: a working equipment for doing works on a structure; a folding/unfolding mechanism for conveying the working equipment to the working position in a folded state; a conveyance mechanism (such as a horizontal thruster) for conveying the working equipment and the folding/unfolding mechanism to the working position; a pressing mechanism (such as a ballast tank) for pressing the working equipment against the lower surface of the structure; and a traveling mechanism including a wheel for traveling along the lower surface of the structure and positioning the apparatus.Type: GrantFiled: November 10, 2005Date of Patent: May 18, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Mitsuaki Shimamura, Takeshi Maehara, Ikuko Kameyama, Hiroyuki Adachi, Yasuhiro Yuguchi, Toru Taguchi
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Publication number: 20090032650Abstract: A reactor metering pipe fixing device fixes a reactor metering pipe disposed in a reactor to a cylindrical outer surface of a jet pump diffuser and reduces stress that may be induced in a weld zone in the reactor metering pipe. An outer holding member 41 is held on the cylindrical outer surface 18a of a jet pump diffuser 18 by a C-shaped holding member 30. The reactor metering pipe 19 is clamped from radial directions by the outer holding member 41 and inner holding members 42 and 43. Wedges 44 and 45 are wedged into a gap between the cylindrical outer surface 18a and the inner holding member 42 and a gap between the cylindrical outer surface 18a and the inner holding member 43 to fix the reactor metering pipe 19 firmly to the cylindrical outer surface 18a.Type: ApplicationFiled: July 3, 2008Publication date: February 5, 2009Inventors: Takeshi MAEHARA, Hideshi Iwasa, Yuusuke Watanabe, Kunihiko Kinugasa, Hajime Mori, Kiyofumi Saiki, Ken Okuda, Tsuyoshi Hagiwara, Noboru Saito, Masanobu Watanabe, Shigeru Kasai
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Publication number: 20080264451Abstract: An apparatus for processing an inside of a pipe which performs various works from an inside of a pipe, includes traveling drive units, a working device, rotation support mechanisms, a coupling mechanism, and suspension devices. The traveling drive units are inserted into the inside of the pipe, and the working device is moved in a circumferential direction along the inside of the pipe by the traveling drive units.Type: ApplicationFiled: March 21, 2008Publication date: October 30, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Mitsuaki SHIMAMURA, Yutaka Togasawa, Takeshi Maehara, Yasuhiro Yuguchi
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Publication number: 20070253518Abstract: A working apparatus has: a working equipment for doing works on a structure; a folding/unfolding mechanism for conveying the working equipment to the working position in a folded state; a conveyance mechanism (such as a horizontal thruster) for conveying the working equipment and the folding/unfolding mechanism to the working position; a pressing mechanism (such as a ballast tank) for pressing the working equipment against the lower surface of the structure; and a traveling mechanism including a wheel for traveling along the lower surface of the structure and positioning the apparatus.Type: ApplicationFiled: November 10, 2005Publication date: November 1, 2007Inventors: Mitsuaki Shimamura, Takeshi Maehara, Ikuko Kameyama, Hiroyuki Adachi, Yasuhiro Yuguchi, Toru Taguchi