Patents by Inventor Kiyoshi Yamaguchi

Kiyoshi Yamaguchi 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).

  • Patent number: 6853388
    Abstract: A graphics map of an area in which a system is set is displayed on a screen of a display unit, and minimized stations and line connecting between the stations are displayed on the map. Display colors of the station icon and the line icon are changed in accordance with presence/absence of a failure. When each station icon is clicked, a window showing a list of NODEs belonging to that station is opened, and a NODE having a failure and a NODE having no failure are also distinguished from each other by changing the display colors in this window.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: February 8, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Michiko Ueno, Tooru Nakao, Hidetoshi Iwasaki, Yasushi Ariga, Youko Yamamoto, Hakaru Nakagawa, Kiyoshi Yamaguchi, Tatsuko Akimoto, Masaaki Nagano, Shinichi Izawa, Shinsuke Watanabe
  • Patent number: 6849983
    Abstract: The rotary machine is composed of the rotor having magnetic poles and the stator having the stator yoke portion constituting the iron core tooth portion wound by the stator winding and the flux flow path of the magnetic poles. The rotor is composed of a metallic material having ferromagnetic parts and non-magnetic parts as a member and has a magnetic barrier area composed of the slit portion for blocking the bypath magnetic path in the periphery of the rotor and the non-magnetic parts. The rotary machine that produced torque can be increased sufficiently and the mechanical strength during high-speed running is improved and an electrical vehicle using it.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: February 1, 2005
    Assignees: Hitachi, Ltd., Hitachi Metals, Ltd.
    Inventors: Fumio Tajima, Yutaka Matsunobu, Masashi Kitamura, Kiyoshi Yamaguchi, Osamu Koizumi, Suetaro Shibukawa, Shigeki Morinaga, Yukinori Taneda, Hideki Nakamura, Hakaru Sasaki, Shinichiro Yokoyama
  • Publication number: 20040104985
    Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.
    Type: Application
    Filed: November 25, 2003
    Publication date: June 3, 2004
    Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
  • Patent number: 6740383
    Abstract: A magnetic recording medium and a magnetic disk device using the same. The magnetic recording medium comprising a nonmagnetic substrate having applied thereon, through two or more chromium-based underlayers, a magnetic recording layer having a circumferential direction of easy magnetization and containing cobalt as a principal component thereof, and also containing chromium and platinum in combination with tantalum or tantalum and niobium. Using the magnetic recording medium, a reproducing output and S/N ratio can be increased without causing an increase in noise.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: May 25, 2004
    Assignee: Fujitsu Limited
    Inventors: Masayoshi Shinohara, Kenji Sato, Yuki Yoshida, Iwao Okamoto, Yasuji Ikeda, Kiyoshi Yamaguchi
  • Patent number: 6729716
    Abstract: A liquid drop jet head includes a nozzle, a liquid room, a vibration board forming a wall surface of the liquid room, driving element, a support substrate to which an end part of the driving element is connected without connecting to the vibration board, and a gap between the support substrate and the vibration board at a position corresponding to a partition of the liquid room, wherein the vibration board includes a thin part and a thick part and the area of the thin part is divided by the thick part with which the driving element comes in contact.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: May 4, 2004
    Assignee: Ricoh Company, Ltd.
    Inventors: Hirotoshi Eguchi, Shuzo Matsumoto, Kenichi Ogata, Kiyoshi Yamaguchi, Takayuki Hiyoshi, Mitsuru Shingyohuchi, Masanori Kusunoki
  • Patent number: 6682185
    Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: January 27, 2004
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
  • Publication number: 20030192801
    Abstract: A wrapping film holding device is provided on a surface (3b) of a wrapping film container (1) on which a pullout opening (3a) is formed for pulling out a wrapping film 10 such as to face the pullout opening (3a), always energizes the wrapping film (10) pulled out through the opening (3a) toward a direction departing from the surface (3b) so that space (S) is secured between the pulled out wrapping film 10 and the surface 3b. The space (S) separates the wrapping film (10) from the surface (3b). The holding device comprises a plate spring (12) for always energizing the pulled out wrapping film (10) toward the direction departing from the surface (3b), and adhesive provided on tongs (12a, 12b) of the plate spring (12) for allowing the wrapping film (10) to adhere on or to electrostatically contact with the top surfaces of the tongs (12a, 12b).
    Type: Application
    Filed: April 10, 2003
    Publication date: October 16, 2003
    Inventor: Kiyoshi Yamaguchi
  • Publication number: 20030141774
    Abstract: A rotor for a rotating electric machine comprises a shaft, a cylindrical permanent magnet put on the shaft, and a holding ring fixedly put on the permanent magnet. The permanent magnet is magnetized by Halbach magnetization, and the holding ring is formed by circumferentially alternately arranging nonmagnetic segments of a nonmagnetic material and magnetic segments of a magnetic material. Another rotor for a rotating electric machine comprises a solid, cylindrical permanent magnet, and a cylindrical holding ring put on the permanent magnet, wherein the permanent magnet is magnetized by Halbach magnetization, and the holding ring is formed by circumferentially alternately arranging nonmagnetic segments of a nonmagnetic material and magnetic segments of a magnetic material. A rotating electric machine is provided with one of the foregoing rotors, and a gas turbine power plant is equipped with a rotating electric machine including one of the foregoing rotors.
    Type: Application
    Filed: January 31, 2003
    Publication date: July 31, 2003
    Applicant: HITACHI LTD.
    Inventors: Akiyoshi Komura, Miyoshi Takahashi, Kazumasa Ide, Mamoru Kimura, Takanobu Mori, Kiyoshi Yamaguchi, Takashi Matsunobu
  • Publication number: 20030067513
    Abstract: A liquid drop jet head includes a nozzle, a liquid room, a vibration board forming a wall surface of the liquid room, driving means, a support substrate to which an end part of the driving means is connected without connecting to the vibration board, and a gap between the support substrate and the vibration board at a position corresponding to a partition of the liquid room, wherein the vibration board comprises a thin part and a thick part and the area of the thin part is divided by the thick part with which the driving means comes in contact.
    Type: Application
    Filed: July 9, 2002
    Publication date: April 10, 2003
    Applicant: Ricoh Company, Ltd.
    Inventors: Hirotoshi Eguchi, Shuzo Matsumoto, Kenichi Ogata, Kiyoshi Yamaguchi, Takayuki Hiyoshi, Mitsuru Shingyohuchi, Masanori Kusunoki
  • Patent number: 6509108
    Abstract: A magnetic recording medium has a nonmagnetic substrate having applied thereon through a nonmagnetic underlayer a magnetic recording layer composed of a magnetic metal material. The nonmagnetic substrate has a smooth surface with an average surface roughness Ra of not more than 20 Å, a recesses-and protrusions-forming layer having stripe-like protrusions and recesses in the circumferential direction, formed on the substrate. A CrP or CrMoP reinforcing coat layer having a hardness higher than that of the recesses-and protrusions-forming layer is sandwiched between the substrate and the recesses-and-protrusions-forming layer.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: January 21, 2003
    Assignee: Fujitsu Limited
    Inventors: Chiaki Okuyama, Yuki Yoshida, Kenji Sato, Kiyoshi Yamaguchi, Yoshita Kitamoto
  • Publication number: 20020175980
    Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.
    Type: Application
    Filed: March 20, 2002
    Publication date: November 28, 2002
    Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
  • Publication number: 20020101565
    Abstract: A multifocal lens has an outer surface and an inner surface. The outer surface has at least farsighted region and nearsighted region. The outer surface has an outer surface TC equal to 180 degrees. A thickness of the lens varies from the farsighted region to the nearsighted region in accordance with the outer surface TC. For example, the thickness of the lens increases from the farsighted region to the nearsighted region in accordance with the outer surface TC. The thickness of the lens is a constant in the farsighted region. As a result, it is possible to enlarge the nearsighted region an to prevent distortion in each edge of the lens.
    Type: Application
    Filed: June 8, 2001
    Publication date: August 1, 2002
    Inventor: Kiyoshi Yamaguchi
  • Publication number: 20020048692
    Abstract: A disk medium has enhanced close contact property between the glass-based substrate and the NiP layer, and has a high shock resistance and a large signal to noise (S/N) ratio. A contact layer including Cr, a NiP layer, a Cr-based underlayer and a magnetic layer are sequentially formed on a non-magnetic substrate. The NiP layer is formed by the sputtering process in the thickness t (nm) under the substrate temperature of T (° C.) to satisfy the condition of T+t≦370. In another aspect of the invention, the disk medium is polished to form circumferential grooves having a depth larger than the maximum value of surface roughness of the NiP layer.
    Type: Application
    Filed: March 14, 2000
    Publication date: April 25, 2002
    Inventors: Tetsuo Hosokawa, Kiyoshi Yamaguchi
  • Patent number: 6377767
    Abstract: The invention is to provide a toner, a toner cartridge and a developing device using the same in that an excellent image without a defect on the image is obtained in a long period of time, and stable agitation and transportation can be conducted. In a toner cartridge containing a toner containing at least a binder resin, a colorant and wax, inside the toner cartridge, and a toner agitating and transporting member for supplying the toner under agitation and transportation, the toner contains the wax in an amount of from 3 to 10% by weight and has a mean particle diameter of from 3 to 10 &mgr;m, and the toner agitating and transporting member is arranged as rotatably inside the toner cartridge to form a distance of from 0.5 to 3.0 mm between the member and an inner wall of a main body of the toner cartridge.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: April 23, 2002
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Koji Fukushima, Yoshihiro Maekawa, Kiyoshi Yamaguchi, Yuusaku Shibuya, Tomomitsu Fukuda, Kazuya Furuta, Masako Kojima
  • Publication number: 20020045069
    Abstract: A magnetic recording medium and a magnetic disk device using the same. The magnetic recording medium comprising a nonmagnetic substrate having applied thereon, through two or more chromium-based underlayers, a magnetic recording layer having a circumferential direction of easy magnetization and containing cobalt as a principal component thereof, and also containing chromium and platinum in combination with tantalum or tantalum and niobium. Using the magnetic recording medium, a reproducing output and S/N ratio can be increased without causing an increase in noise.
    Type: Application
    Filed: March 24, 1999
    Publication date: April 18, 2002
    Inventors: MASAYOSHI SHINOHARA, KENJI SATO, YUKI YOSHIDA, IWAO OKAMOTO, YASUJI IKEDA, KIYOSHI YAMAGUCHI
  • Publication number: 20020029294
    Abstract: On a screen of a display unit, all NODEs in a ring network to which a connected node (NODE) belongs are minimized and displayed on a screen of a display unit, and a line connecting NODEs with each other is displayed between respective NODE icons. Display colors of the NODE icon and the line icon are changed depending on presence/absence of a failure. Further, a display color of each object displayed in each window varies in a plurality of stages in accordance with a degree of a failure.
    Type: Application
    Filed: October 22, 2001
    Publication date: March 7, 2002
    Inventors: Michiko Ueno, Hidetoshi Iwasaki, Masaaki Nagano, Shinichi Izawa, Tooru Nakao, Youko Yamamoto, Hakaru Nakagawa, Yasushi Ariga, Tatsuko Akimoto, Kiyoshi Yamaguchi
  • Publication number: 20020024632
    Abstract: This invention prevents distortion in a portion area for farness in a multifocal lens. Therefore, the multifocal lens comprises a portion area for farness 12 molded so as to have a first curvature radius, and a portion area for nearness 13 molded so as to have a second curvature radius shorter than the first curvature radius, and a side portion prescribing an edge portion of the lens has a predetermined thickness irrespective of the portion area for farness and the portion area for nearness. For example, the thickness of the side portion is set to be entirely equal in the portion area for farness and the portion area for nearness by progressively changing the first curvature radius toward the side portion of the lens. Thus, distortion can be prevented in the portion area for farness. Further, if the thickness of the lens side portion is changed in accordance with the direction of a lens axial angle, it is possible to prevent distortion in the portion area for farness and cope with astigmatism.
    Type: Application
    Filed: April 4, 2001
    Publication date: February 28, 2002
    Inventor: KIYOSHI YAMAGUCHI
  • Publication number: 20020024535
    Abstract: A graphics map of an area in which a system is set is displayed on a screen of a display unit, and minimized stations and line connecting between the stations are displayed on the map. Display colors of the station icon and the line icon are changed in accordance with presence/absence of a failure. When each station icon is clicked, a window showing a list of NODEs belonging to that station is opened, and a NODE having a failure and a NODE having no failure are also distinguished from each other by changing the display colors in this window.
    Type: Application
    Filed: October 22, 2001
    Publication date: February 28, 2002
    Inventors: Michiko Ueno, Tooru Nakao, Hidetoshi Iwasaki, Yasushi Ariga, Youko Yamamoto, Hakaru Nakagawa, Kiyoshi Yamaguchi, Tatsuko Akimoto, Masaaki Nagano, Shinichi Izawa, Shinsuke Watanabe
  • Publication number: 20010030829
    Abstract: A magnetic recording medium comprising a nonmagnetic substrate having applied thereon through a nonmagnetic underlayer a magnetic recording layer composed of a magnetic metal material, in which the nonmagnetic substrate comprises a substrate having a smooth surface with an average surface roughness Ra of not more than 20 Å, a recesses-and protrusions-forming layer having stripe-like protrusions and recesses in the circumferential direction, formed on the substrate, and a reinforcing coat layer having a hardness higher than that of the recesses-and protrusions-forming layer is sandwiched between the substrate and the recesses-and-protrusions-forming layer. The magnetic recording medium is excellent in a characteristic of friction sliding with a flying-type magnetic head, can improve the reproducing output and S/N ratio while the low noise of the magnetic recording medium is kept without change, and prevents easy production of bit errors.
    Type: Application
    Filed: March 19, 2001
    Publication date: October 18, 2001
    Applicant: FUJITSU LIMITED
    Inventors: Chiaki Okuyama, Yuki Yoshida, Kenji Sato, Kiyoshi Yamaguchi, Yoshito Kitamoto
  • Publication number: 20010026108
    Abstract: The rotary machine 1 is composed of the rotor 3 having magnetic poles and the stator 4 having the stator yoke portion 41 constituting the iron core tooth portion 42 wound by the stator winding 5 and the flux flow path of the magnetic poles. The rotor 3 is composed of a metallic material having ferromagnetic parts and non-magnetic parts as a member and has a magnetic barrier area composed of the slit portion 72 for blocking the bypath magnetic path in the periphery of the rotor and the non-magnetic parts 75. The rotary machine that produced torque can be increased sufficiently and the mechanical strength during high-speed running is improved and an electrical vehicle using it.
    Type: Application
    Filed: March 2, 2001
    Publication date: October 4, 2001
    Inventors: Fumio Tajima, Yutaka Matsunobu, Masashi Kitamura, Kiyoshi Yamaguchi, Osamu Koizumi, Suetaro Shibukawa, Shigeki Morinaga, Yukinori Taneda, Hideki Nakamura, Hakaru Sasaki, Shinichiro Yokohama