Patents by Inventor Hirofumi Ouchi
Hirofumi Ouchi 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: 9222915Abstract: An eddy current flaw detection system includes an eddy current flaw detection probe having a substrate facing an inspection surface, and at least one exciting coil and at least two detecting coils provided on the substrate, a scanning device which scans the probe on the inspection surface, a scan control device which drives and controls the scanning device, an eddy current flaw detection device which acquires results of detection of a plurality of detection points corresponding to combinations of the exciting and detecting coils for each scan position of the probe, and a data processing/display device which processes data from the scan control device and the eddy current flaw detection device and thereby displays a result of flaw detection. The data processing/display device acquires three-dimensional coordinates of the detection points for each scan position of the probe and thereby creates three-dimensional flaw detection data.Type: GrantFiled: January 23, 2013Date of Patent: December 29, 2015Assignee: Hitachi-GE Nuclear Energy, Ltd.Inventors: Akira Nishimizu, So Kitazawa, Naoyuki Kono, Hisashi Endo, Kenichi Otani, Taiichiro Yamada, Hirofumi Ouchi, Isao Yoshida, Yoshio Nonaka, Masafumi Imai
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Patent number: 8554423Abstract: An automatic transmission device for a wheel loader includes: a shift mechanism; a work detection device that detects that the wheel loader is performing an excavation work; and a shift control device that executes control so as to downshift a speed stage at the shift mechanism if the work detection device detects that the wheel loader is performing the excavation work.Type: GrantFiled: June 1, 2006Date of Patent: October 8, 2013Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Tetsuji Tanaka, Masami Higaki, Hirofumi Ouchi, Eiichi Sakai
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Patent number: 8228058Abstract: Disclosed is an eddy current flaw detection probe that is capable of pressing itself against an inspection target whose curvature varies. A flaw sensor is configured by fastening a plurality of coils to a flexible substrate that faces the surface of the inspection target. A first elastic body is positioned opposite the inspection target for the flaw sensor, is obtained by stacking two or more elastic plates, and has an elastic coefficient that varies in a longitudinal direction. A second elastic body is a porous body positioned between the flexible substrate and the first elastic body. A pressure section is employed to press the first elastic body toward the inspection target.Type: GrantFiled: May 28, 2008Date of Patent: July 24, 2012Assignee: Hitachi-GE Nuclear Energy, Ltd.Inventors: Akira Nishimizu, Hirofumi Ouchi, Yoshio Nonaka, Yosuke Takatori, Akihiro Taki, Makoto Senoo
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Patent number: 8183862Abstract: An eddy current testing device which confirms that a change in characteristics of a target object is detected regardless of the magnitude of the change and specifying the position of a portion from which the change is detected. The device uses an eddy current probe to inspect a bent portion of a metal body, and has an inspection controller and a display unit. The inspection controller calculates a phase angle of a signal detected by the eddy current probe and generates flaw identification image data that indicates an area (or an area of the signal detected and determined to correspond to a flaw signal, based on the phase angle of the detected signal) of a flaw signal in coordinates in which the position of the portion of the target object is plotted along a coordinate axis. The display unit displays the flaw identification image data.Type: GrantFiled: February 20, 2009Date of Patent: May 22, 2012Assignee: Hitachi, Ltd.Inventors: Hisashi Endo, Akira Nishimizu, Hirofumi Ouchi, Yoshio Nonaka
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Publication number: 20100017076Abstract: An automatic transmission device for a wheel loader includes: a shift mechanism; a work detection device that detects that the wheel loader is performing an excavation work; and a shift control device that executes control so as to downshift a speed stage at the shift mechanism if the work detection device detects that the wheel loader is performing the excavation work.Type: ApplicationFiled: June 1, 2006Publication date: January 21, 2010Applicants: TCM Corporation, Hitachi Construction Machinery Co., LtdInventors: Tetsuji Tanaka, Masami Higaki, Hirofumi Ouchi, Eiichi Sakai
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Publication number: 20090230952Abstract: An eddy current testing device which confirms that a change in characteristics of a target object is detected regardless of the magnitude of the change and specifying the position of a portion from which the change is detected. The device uses an eddy current probe to inspect a bent portion of a metal body, and has an inspection controller and a display unit. The inspection controller calculates a phase angle of a signal detected by the eddy current probe and generates flaw identification image data that indicates an area (or an area of the signal detected and determined to correspond to a flaw signal, based on the phase angle of the detected signal) of a flaw signal in coordinates in which the position of the portion of the target object is plotted along a coordinate axis. The display unit displays the flaw identification image data.Type: ApplicationFiled: February 20, 2009Publication date: September 17, 2009Inventors: Hisashi Endo, Akira Nishimizu, Hirofumi Ouchi, Yoshio Nonaka
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Publication number: 20090009162Abstract: Disclosed is an eddy current flaw detection probe that is capable of pressing itself against an inspection target whose curvature varies. A flaw sensor is configured by fastening a plurality of coils to a flexible substrate that faces the surface of the inspection target. A first elastic body is positioned opposite the inspection target for the flaw sensor, is obtained by stacking two or more elastic plates, and has an elastic coefficient that varies in a longitudinal direction. A second elastic body is a porous body positioned between the flexible substrate and the first elastic body. A pressure section is employed to press the first elastic body toward the inspection target.Type: ApplicationFiled: May 28, 2008Publication date: January 8, 2009Inventors: Akira NISHIMIZU, Hirofumi Ouchi, Yoshio Nonaka, Yosuke Takatori, Akihiro Taki, Makoto Senoo
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Patent number: 7358721Abstract: An eddy current flaw detection sensor is provided which can detect a circumferential crack occurring at the deformed portion or peripheral portion thereof of a heat transfer tube with a high degree of sensitivity. Two excitation coils 1a, 1b cause eddy current B to flow in the axial direction of a tubular test object 31. A detection coil 2 disposed between the excitation coils 1a, 1b detects bypass eddy current D which flows in the circumferential direction of the test object 31 while bypassing a circumferential crack E. For this purpose, the coil axes of the excitation coils 1a, 1b are directed to the radial direction of the cylindrical protection member 3 and the coil axis of the detection coil 2 is directed to the axial direction of the protection member 3.Type: GrantFiled: March 1, 2007Date of Patent: April 15, 2008Assignee: Hitachi, Ltd.Inventors: Soshi Narishige, Akira Nishimizu, Masahiro Koike, Yoshiharu Abe, Yuuichi Narumi, Hirofumi Ouchi
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Publication number: 20070229066Abstract: An eddy current flaw detection sensor is provided which can detect a circumferential crack occurring at the deformed portion or peripheral portion thereof of a heat transfer tube with a high degree of sensitivity. Two excitation coils 1a, 1b cause eddy current B to flow in the axial direction of a tubular test object 31. A detection coil 2 disposed between the excitation coils 1a, 1b detects bypass eddy current D which flows in the circumferential direction of the test object 31 while bypassing a circumferential crack E. For this purpose, the coil axes of the excitation coils 1a, 1b are directed to the radial direction of the cylindrical protection member 3 and the coil axis of the detection coil 2 is directed to the axial direction of the protection member 3.Type: ApplicationFiled: March 1, 2007Publication date: October 4, 2007Inventors: Soshi Narishige, Akira Nishimizu, Masahiro Koike, Yoshiharu Abe, Yuuichi Narumi, Hirofumi Ouchi
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Patent number: 6400530Abstract: A method for manufacturing a magnetic head core of a complex magnetic head includes binding a first core material of a U-shaped cross section and a second core material of a flat plate shape to form a tubular core material having two bonded portions between the first and second core materials. Then a plurality of grooves are formed in the tubular core material across one of the bonded portions to form a plurality of track surfaces. The grooves are then filled with a fused glass material, and the other of the bonded portions is removed to form a substantially U-shaped core block having a plurality of track surfaces separated by the glass-filled grooves. The U-shaped core block is then sliced along each of the grooves to obtain a plurality of magnetic head cores. A complex magnetic head manufactured by the method is also disclosed.Type: GrantFiled: June 4, 1999Date of Patent: June 4, 2002Assignee: Mitsubishi Denki K.K.Inventors: Hirofumi Ouchi, Toshihisa Obuse, Yoshio Kasuga, Tatsunori Hibara, Masao Kouhashi, Kouichi Yamada, Seiichi Handa, Hiromasa Ishii, Seiichi Watanabe
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Patent number: 6088909Abstract: A method for manufacturing a magnetic head core of a complex magnetic head includes binding a first core material of a U-shaped cross section and a second core material of a flat plate shape to form a tubular core material having two bonded portions between the first and second core materials. Then a plurality of grooves are formed in the tubular core material across one of the bonded portions to form a plurality of track surfaces. The grooves are then filled with a fused glass material, and the other of the bonded portions is removed to form a substantially U-shaped core block having a plurality of track surfaces separated by the glass-filled grooves. The U-shaped core block is then sliced along each of the grooves to obtain a plurality of magnetic head cores. A complex magnetic head manufactured by the method is also disclosed.Type: GrantFiled: January 8, 1998Date of Patent: July 18, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hirofumi Ouchi, Toshihisa Obuse, Yoshio Kasuga, Tatsunori Hibara, Masao Kouhashi, Kouichi Yamada, Seiichi Handa, Hiromasa Ishii, Seiichi Watanabe
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Patent number: 6078467Abstract: A radial gap type medium driving motor for rotating a recording medium has first coil units having first windings of a first number of layers and second coil units having second windings of a second number of layers that is larger than the first number of layers. The first and second coil units are formed by winding wire on tooth-like poles of tooth-like pole blocks of a stator. A frame provided with a bearing portion for rotatably supporting the medium driving motor has a first accommodating portion for accommodating the first coil units and second accommodating portions for accommodating the second coil units.Type: GrantFiled: April 29, 1998Date of Patent: June 20, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Satoru Akutsu, Hitoshi Tamayama, Hirofumi Ouchi, Yuji Nakahara, Nobuaki Miyake
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Patent number: 6034846Abstract: A complex magnetic head in which magnetically separated upper and lower rank core chips are spaced apart and connected to a support block made of a nonmagnetic material in such a way as to be in parallel with each other. Each of the upper and lower rank core chips have first, second and third cores. Magnetic gaps, whose track widths are different from each other, are provided between the first and second cores of one of the upper and lower rank core chips and between the second and third cores of the other of the upper and lower rank core chips, respectively.Type: GrantFiled: August 6, 1997Date of Patent: March 7, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hirofumi Ouchi, Yoshio Kasuga, Masao Kouhashi, Tatsunori Hibara, Hiromasa Ishii, Seiichi Handa, Hiroshi Kobayashi
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Patent number: 5919567Abstract: A magnetic head is disclosed which includes in a preferred embodiment a head core (1) sandwiched between a first slider (2) and a second slider (3) both bonded to the core (1), said first and second sliders (2) and (3) being made from a resin composition comprising an epoxy resin composition and a filler comprising silica having a coefficient of thermal expansion of from 5.times.10.sup.-7 to 6.times.10.sup.-7 /.degree. C. as the main component and from 3 to 30 wt % at least one minor component selected from alumina, mullite, barium titanate, forsterite, steatite, and zircon, the amount of the filler being from 50 to 95 wt % based on the amount of the epoxy resin composition. The magnetic head is inexpensive, does not suffer deterioration of the magnetic characteristics of the head core, and is free from the problem of sticking to a floppy disk, head wear, or media wear.Type: GrantFiled: November 27, 1996Date of Patent: July 6, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masaru Okada, Hiromi Ito, Hirofumi Ouchi
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Patent number: 5806172Abstract: In relation to the magnetic head using a polycrystalline Mn-Zn ferrite as a core material, a magnetic head manufacturing method is provided for preventing the generation of the post-recording noise which is a pulse noise generated immediately after the completion of a current flow through the recording and reproducing coil. A fused core block is manufactured using Mn-Zn ferrite having a mean crystal grain size of equal to or less than 30 .mu.m as the core material of at least the recording and reproducing head and glass fusion using one type of glass, and the fused core block is annealed at a temperature equal to or higher than the strain point of the glass.Type: GrantFiled: September 2, 1997Date of Patent: September 15, 1998Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masaru Okada, Yuichiro Murata, Hirofumi Ouchi
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Patent number: 5740504Abstract: An electrophotographing method using a corona charging device having areas with and without a grid. Prior to at least a second exposure step, a charging step is effected using both areas relative to the grid. A voltage applied to the grid in the second charging is lower than that in the first charging, and lower than a potential of a non-image region of the photosensitive body.Type: GrantFiled: May 24, 1996Date of Patent: April 14, 1998Assignee: Hitachi Koki Co., Ltd.Inventors: Katsuhiro Akinaga, Hirofumi Ouchi, Kaoru Kataoka
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Patent number: D549738Type: GrantFiled: December 29, 2005Date of Patent: August 28, 2007Assignees: Hitachi Construction Machinery Co., Ltd., TCM Co., Ltd.Inventors: Kazuhiko Hiraoka, Jujutsu Murota, Tsuyoshi Sakyo, Kazunori Komatsu, Ei Takahashi, Hirofumi Ouchi