Patents by Inventor Takahiro Kawaguchi

Takahiro Kawaguchi 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).

  • Publication number: 20210218358
    Abstract: In a thyristor starter, an inverter converts DC power provided from a converter through a DC reactor into AC power having a variable frequency, and supplies the AC power to a synchronous machine. A controller controls the inverter based on a phase control angle. A voltage regulator regulates an induced voltage of the synchronous machine by supplying a field current to the synchronous machine. When a rotation speed of the synchronous machine exceeds a reference rotation speed during acceleration of the synchronous machine, the voltage regulator controls the field current such that the induced voltage increases with an increase in the rotation speed of the synchronous machine. The controller decreases a rate of increase in the phase control angle relative to the rotation speed of the synchronous machine, as compared with when the rotation speed of the synchronous machine is less than the reference rotation speed.
    Type: Application
    Filed: January 4, 2019
    Publication date: July 15, 2021
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Takahiro OTA, Hironori KAWAGUCHI, Hiroshi OGINO, Yasuaki MATSUMOTO, Akinobu ANDO
  • Patent number: 10990070
    Abstract: A state quantity acquiring unit is configured to acquire a state quantity of a turbine. A time calculation unit is configured to calculate an operable time at an over firing operation of the turbine based on a design life of the turbine and a state quantity. A distance calculation unit configured to calculate a Mahalanobis distance based on the state quantity. A determination unit configured to determine whether or not the over firing operation of the turbine is possible by the Mahalanobis distance and the operable time.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: April 27, 2021
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Yasuoki Tomita, Katsuhiko Abe, Shintaro Kumano, Motoshi Takasu, Etsushi Kanno, Takahiro Kawaguchi, Takayoshi Isoda, Yuki Enomoto, Nobuhiro Osaki, Kazuyuki Misawa, Akihisa Endo, Masao Ogino
  • Publication number: 20210072676
    Abstract: According to an embodiment, a fixing device used for fixing a toner image to a sheet in a printing process includes a rotatable heated body having an inner facing surface and an outer facing surface. A heater for heating the rotatable heated body has a length corresponding to the length of the heated body. A pressing member contacts the inner facing surface of the rotatable heated body at a first position. A pressing roller presses against the outer facing surface of the rotatable heated body at a position corresponding to the pressing member. A lubricant holding member has a lubricating surface that contacts the inner facing surface of the rotatable heated body at a second position. The lubricant holding member has a plurality of recesses in its lubricating surface. The recesses are spaced from each other along the length of the lubricant holding member.
    Type: Application
    Filed: June 16, 2020
    Publication date: March 11, 2021
    Inventor: Takahiro KAWAGUCHI
  • Patent number: 10866689
    Abstract: To indirectly express a state change of an information processing apparatus. An information processing apparatus includes a display control unit that generates a display screen including a background object, and the display control unit moves the background object in accordance with a state change of the information processing apparatus.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: December 15, 2020
    Assignee: SONY MOBILE COMMUNICATIONS INC.
    Inventors: Tatsuya Hama, Shoichiro Moriya, Takahiro Kawaguchi
  • Publication number: 20200050343
    Abstract: To indirectly express a state change of an information processing apparatus. An information processing apparatus includes a display control unit that generates a display screen including a background object, and the display control unit moves the background object in accordance with a state change of the information processing apparatus.
    Type: Application
    Filed: December 19, 2017
    Publication date: February 13, 2020
    Applicant: Sony Mobile Communications Inc.
    Inventors: Tatsuya HAMA, Shoichiro MORIYA, Takahiro KAWAGUCHI
  • Patent number: 10543831
    Abstract: A control apparatus for a vehicle provided with a motor/generator functioning as a drive power source, and a mechanically operated transmission mechanism which constitutes a part of a power transmitting path between the motor/generator and drive wheels, the control apparatus including a motor/generator control portion configured to implement a regenerative torque control of the motor/generator so as to generate a regenerative torque according to a braking operation by an operator of the vehicle in a decelerating run of the vehicle, and a transmission shifting control portion configured to initiate a shift-down action of the mechanically operated transmission mechanism after a rate of change of the regenerative torque has been held within a predetermined range for at least a predetermined length of time, where a determination to implement the shift-down action is made in the process of the regenerative torque control of the motor/generator according to the braking operation.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: January 28, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kenta Kumazaki, Hiromichi Kimura, Kazuyuki Shiiba, Tooru Matsubara, Takeshi Kitahata, Nobufusa Kobayashi, Masato Yoshikawa, Masayuki Baba, Shun Sato, Takahiro Kawaguchi
  • Patent number: 10336117
    Abstract: An image erasing apparatus according to an embodiment includes a sheet supply portion that supplies a sheet and an ejector. A first conveying path conveys the sheet from the sheet supply portion toward the ejector. A reader arranged on the first conveying path reads an image on the sheet. A second conveying path branches from the first conveying path at a downstream of the reader on the first conveying path and merges with the first conveying path at an upstream of the reader on the first conveying path. An erasing unit is arranged on the second conveying path. A conveying path changing portion is arranged at a branching portion. An operating portion receives a setup of the processing to the sheet. A controller changes a conveying path of the sheet in accordance with the setup received by the operating portion before the sheet is supplied from the sheet supply portion.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: July 2, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Ken Iguchi, Hidetoshi Yokochi, Isao Yahata, Takahiro Kawaguchi, Yoshiaki Sugizaki, Kikuo Mizutani, Hiroyuki Taki, Hiroyuki Tsuchihashi, Chiaki Iizuka
  • Patent number: 10303096
    Abstract: An image forming apparatus includes a controller to control a process of printing identification information along with an image on a medium. A first image forming section forms images using a non-decolorable material. A second image forming section forms images using a decolorable material. A fixing device performs fixes images to the medium at a first fixing temperature at or above a decoloring temperature of the decolorable material. When the identification information is to be visible, the controller controls the first image forming section to form the image and identification information, and the images are fixed to the medium at the first temperature. When the identification information printed on the medium is to be invisible, the first image forming section forms the first image, the second image forming section forms the identification information, and the fixing device fixes the images at the first temperature.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: May 28, 2019
    Assignee: Toshiba TEC Kabushiki Kaisha
    Inventor: Takahiro Kawaguchi
  • Publication number: 20190018380
    Abstract: A state quantity acquiring unit is configured to acquire a state quantity of a turbine. A time calculation unit is configured to calculate an operable time at an over firing operation of the turbine based on a design life of the turbine and a state quantity. A distance calculation unit configured to calculate a Mahalanobis distance based on the state quantity. A determination unit configured to determine whether or not the over firing operation of the turbine is possible by the Mahalanobis distance and the operable time.
    Type: Application
    Filed: December 8, 2016
    Publication date: January 17, 2019
    Inventors: Yasuoki TOMITA, Katsuhiko ABE, Shintaro KUMANO, Motoshi TAKASU, Etsushi KANNO, Takahiro KAWAGUCHI, Takayoshi ISODA, Yuki ENOMOTO, Nobuhiro OSAKI, Kazuyuki MISAWA, Akihisa ENDO, Masao OGINO
  • Publication number: 20190018384
    Abstract: A state quantity acquiring unit is configured to acquire a state quantity of a turbine including a temperature of the turbine. A variable calculation unit is configured to calculate a history variable with respect to a history of the state quantity. A time calculation unit is configured to calculate the operable time at an over firing operation of the turbine based on a history variable corresponding to a design life of the turbine and a calculated history variable.
    Type: Application
    Filed: December 8, 2016
    Publication date: January 17, 2019
    Inventors: Yasuoki TOMITA, Katsuhiko ABE, Shintaro KUMANO, Motoshi TAKASU, Etsushi KANNO, Takahiro KAWAGUCHI, Masao OGINO
  • Publication number: 20180354495
    Abstract: A control apparatus for a vehicle provided with a motor/generator functioning as a drive power source, and a mechanically operated transmission mechanism which constitutes a part of a power transmitting path between the motor/generator and drive wheels, the control apparatus including a motor/generator control portion configured to implement a regenerative torque control of the motor/generator so as to generate a regenerative torque according to a braking operation by an operator of the vehicle in a decelerating run of the vehicle, and a transmission shifting control portion configured to initiate a shift-down action of the mechanically operated transmission mechanism after a rate of change of the regenerative torque has been held within a predetermined range for at least a predetermined length of time, where a determination to implement the shift-down action is made in the process of the regenerative torque control of the motor/generator according to the braking operation.
    Type: Application
    Filed: June 4, 2018
    Publication date: December 13, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kenta KUMAZAKI, Hiromichi KIMURA, Kazuyuki SHIIBA, Tooru MATSUBARA, Takeshi KITAHATA, Nobufusa KOBAYASHI, Masato YOSHIKAWA, Masayuki BABA, Shun SATO, Takahiro KAWAGUCHI
  • Patent number: 10131174
    Abstract: An erasing apparatus of embodiments has a color erasing device, the color erasing device has: a first heating member; a second heating member provided at a position facing the first heating member so as to form a nip portion therebetween through which the sheet is passed; a halogen lamp configured to heat the second heating member from outside thereof; and a reflector provided at a position opposite to the second heating member with the halogen lamp interposed therebetween and having a reflective surface configured to reflect heat received from the halogen lamp toward the second heating member, the reflector forming a guiding section configured to be in sliding contact with the sheet being conveyed so as to guide the sheet to the nip portion, the guiding section being heated by the halogen lamp.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: November 20, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Hiroyuki Tsuchihashi, Kikuo Mizutani, Hidetoshi Yokochi, Isao Yahata, Takahiro Kawaguchi, Yoshiaki Sugizaki, Hiroyuki Taki, Ken Iguchi, Chiaki Iizuka
  • Patent number: 10112427
    Abstract: An image decoloring device operates in a power-saving mode and in a normal mode. The image decoloring device includes a decoloring processing unit which removes a color of a decolorable colorant that forms an image on a sheet by applying heat to the sheet. A sheet carrying unit conveys the sheet through the decoloring processing unit. A processor controls the sheet carrying unit. If the image decoloring device is operating in the power-saving mode, a conveyance speed of the sheet through the decoloring processing unit is a first speed. If the image decoloring carrying unit is operating in the normal mode, the conveyance speed of the sheet through the decoloring processing unit is a second speed greater than the first speed.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: October 30, 2018
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Ken Iguchi, Isao Yahata, Takahiro Kawaguchi, Hiroyuki Taguchi, Hiroyuki Tsuchihashi, Hiroyuki Taki
  • Publication number: 20180304662
    Abstract: An image erasing apparatus according to an embodiment includes a sheet supply portion that supplies a sheet and an ejector. A first conveying path conveys the sheet from the sheet supply portion toward the ejector. A reader arranged on the first conveying path reads an image on the sheet. A second conveying path branches from the first conveying path at a downstream of the reader on the first conveying path and merges with the first conveying path at an upstream of the reader on the first conveying path. An erasing unit is arranged on the second conveying path. A conveying path changing portion is arranged at a branching portion. An operating portion receives a setup of the processing to the sheet. A controller changes a conveying path of the sheet in accordance with the setup received by the operating portion before the sheet is supplied from the sheet supply portion.
    Type: Application
    Filed: June 27, 2018
    Publication date: October 25, 2018
    Inventors: Ken IGUCHI, Hidetoshi YOKOCHI, Isao YAHATA, Takahiro KAWAGUCHI, Yoshiaki SUGIZAKI, Kikuo MIZUTANI, Hiroyuki TAKI, Hiroyuki TSUCHIHASHI, Chiaki IIZUKA
  • Publication number: 20180284972
    Abstract: There is provided a GUI with which a user easily notices what a computer system should inform a user. An aspect of the present technology that accomplishes the object above is a display control apparatus including a control unit. The control unit outputs a first display element expressed on a display surface by a dot having a first color whose contrast is higher than that of the display surface. Further, the control unit outputs one or a plurality of second display elements expressed on the display surface by a line having the first color. Further, the control unit moves or deforms at least any of the first display element and the second display elements.
    Type: Application
    Filed: February 16, 2017
    Publication date: October 4, 2018
    Applicants: SONY CORPORATION, Sony Mobile Communications Inc.
    Inventors: Satoshi AKAGAWA, Shinichi IRIYA, Yoshihito OHKI, Makoto IMAMURA, Takahiro KAWAGUCHI, Masanori MATSUSHIMA, Kazuma TAKAHASHI
  • Patent number: D845994
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: April 16, 2019
    Assignee: SONY CORPORATION
    Inventors: Satoshi Akagawa, Shinichi Iriya, Yoshihito Ohki, Makoto Imamura, Takahiro Kawaguchi, Masanori Matsushima, Kazuma Takahashi, Katsuji Miyazawa, Goro Takaki
  • Patent number: D855649
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: August 6, 2019
    Assignee: SONY CORPORATION
    Inventors: Satoshi Akagawa, Shinichi Iriya, Yoshihito Ohki, Makoto Imamura, Takahiro Kawaguchi, Masanori Matsushima
  • Patent number: D866590
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: November 12, 2019
    Assignee: SONY CORPORATION
    Inventors: Satoshi Akagawa, Shinichi Iriya, Yoshihito Ohki, Makoto Imamura, Takahiro Kawaguchi, Masanori Matsushima
  • Patent number: D911385
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: February 23, 2021
    Assignee: SONY CORPORATION
    Inventors: Satoshi Akagawa, Shinichi Iriya, Yoshihito Ohki, Makoto Imamura, Takahiro Kawaguchi, Masanori Matsushima, Goro Takaki, Tatsuya Hama, Kazuma Takahashi, Katsuji Miyazawa, Daisuke Sato, Shoichiro Moriya, Takamoto Tsuda
  • Patent number: D919654
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: May 18, 2021
    Assignee: SONY CORPORATION
    Inventors: Satoshi Akagawa, Shinichi Iriya, Yoshihito Ohki, Makoto Imamura, Takahiro Kawaguchi, Masanori Matsushima