Patents by Inventor Hirokazu Nagai

Hirokazu Nagai 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: 20220387682
    Abstract: The present invention relates to a phosphate adsorbing agent for blood processing comprising a porous formed article comprising an organic polymer resin and an inorganic ion adsorbent and having the most frequent pore size of 0.08 to 0.70 ?m measured with a mercury porosimeter. The present invention also relates to a blood processing system and a blood processing method involving the phosphate adsorbing agent for blood processing.
    Type: Application
    Filed: August 16, 2022
    Publication date: December 8, 2022
    Applicant: ASAHI KASEI MEDICAL CO., LTD.
    Inventors: Naoki MORITA, Hiroshi TAJIMA, Ryou SASAKI, Hirokazu NAGAI, Akihiro OMORI
  • Patent number: 11323060
    Abstract: A motor control apparatus includes: a converter configured to convert alternating current power of an AC source into direct current power; an inverter configured to convert the direct current power in a DC link into alternating current power for motor driving by the switching device being subjected to ON/OFF control, a DC link voltage detection unit configured to detect a DC link voltage, a DC link voltage determination unit configured to determine whether the DC link voltage exceeds a voltage threshold value, an alarm signal output unit configured to output an alarm signal in an abnormal condition; and a switching control unit configured to perform ON/OFF control on the switching device, and, when the alarm signal is output and the DC link voltage exceeds the voltage threshold value, the switching control unit performs control in such a way as to turn on all the switching device of a lower arm.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: May 3, 2022
    Assignee: Fanuc Corporation
    Inventors: Hironao Tanouchi, Naoki Masuda, Masato Watanabe, Hirokazu Nagai
  • Patent number: 11223194
    Abstract: A motor control apparatus includes: a main power conversion circuit that converts power that is supplied from a power supply into alternating current power for driving a motor, and outputs the alternating current power; a counter electromotive force protection circuit including a rectifier unit that rectifies alternating current power based on counter electromotive force of the motor and outputs direct current power, a short-circuit unit that short-circuits terminals on a direct current output side of the rectifier unit, and an alarm signal output unit that outputs an alarm signal at occurrence of an abnormality; a monitoring unit that monitors whether the alarm signal is output from the alarm signal output unit; and a protection operation unit that performs a protection operation for preventing damage to the main power conversion circuit when the monitoring unit determines that the alarm signal is output from the alarm signal output unit.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: January 11, 2022
    Assignee: Fanuc Corporation
    Inventors: Hironao Tanouchi, Naoki Masuda, Masato Watanabe, Hirokazu Nagai
  • Patent number: 11043345
    Abstract: There are provided a driving control portion configured to output a closing command for bringing a contact to a closed state to a first driving portion, and also to output to the first driving portion an opening command for bringing the contact to an open state and the closing command in an alternate and repeated manner until the current runs through the contact; a number-of-retries obtaining portion configured to obtain, as a number of retries, the number of times that the driving control portion repeated the opening command and the closing command until the current runs through the contact after the driving control portion outputted the closing command to the first driving portion; and a usable period estimating portion configured to estimate a usable period from the present time of a first relay in accordance with the number of retries.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: June 22, 2021
    Assignee: FANUC CORPORATION
    Inventors: Hirokazu Nagai, Masaya Tateda, Yasuyuki Matsumoto
  • Publication number: 20210184620
    Abstract: A motor control apparatus includes: a converter configured to convert alternating current power of an AC source into direct current power; an inverter configured to convert the direct current power in a DC link into alternating current power for motor driving by the switching device being subjected to ON/OFF control, a DC link voltage detection unit configured to detect a DC link voltage, a DC link voltage determination unit configured to determine whether the DC link voltage exceeds a voltage threshold value, an alarm signal output unit configured to output an alarm signal in an abnormal condition; and a switching control unit configured to perform ON/OFF control on the switching device, and, when the alarm signal is output and the DC link voltage exceeds the voltage threshold value, the switching control unit performs control in such a way as to turn on all the switching device of a lower arm.
    Type: Application
    Filed: December 3, 2020
    Publication date: June 17, 2021
    Applicant: Fanuc Corporation
    Inventors: Hironao Tanouchi, Naoki Masuda, Masato Watanabe, Hirokazu Nagai
  • Publication number: 20210184457
    Abstract: A motor control apparatus includes: a main power conversion circuit that converts power that is supplied from a power supply into alternating current power for driving a motor, and outputs the alternating current power; a counter electromotive force protection circuit including a rectifier unit that rectifies alternating current power based on counter electromotive force of the motor and outputs direct current power, a short-circuit unit that short-circuits terminals on a direct current output side of the rectifier unit, and an alarm signal output unit that outputs an alarm signal at occurrence of an abnormality; a monitoring unit that monitors whether the alarm signal is output from the alarm signal output unit; and a protection operation unit that performs a protection operation for preventing damage to the main power conversion circuit when the monitoring unit determines that the alarm signal is output from the alarm signal output unit.
    Type: Application
    Filed: November 20, 2020
    Publication date: June 17, 2021
    Applicant: Fanuc Corporation
    Inventors: Hironao Tanouchi, Naoki Masuda, Masato Watanabe, Hirokazu Nagai
  • Publication number: 20190244779
    Abstract: There are provided a driving control portion configured to output a closing command for bringing a contact to a closed state to a first driving portion, and also to output to the first driving portion an opening command for bringing the contact to an open state and the closing command in an alternate and repeated manner until the current runs through the contact; a number-of-retries obtaining portion configured to obtain, as a number of retries, the number of times that the driving control portion repeated the opening command and the closing command until the current runs through the contact after the driving control portion outputted the closing command to the first driving portion; and a usable period estimating portion configured to estimate a usable period from the present time of a first relay in accordance with the number of retries.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 8, 2019
    Applicant: FANUC CORPORATION
    Inventors: Hirokazu Nagai, Masaya Tateda, Yasuyuki Matsumoto
  • Publication number: 20180326136
    Abstract: The present invention relates to a phosphate adsorbing agent for blood processing comprising a porous formed article comprising an organic polymer resin and an inorganic ion adsorbent and having the most frequent pore size of 0.08 to 0.70 ?m measured with a mercury porosimeter. The present invention also relates to a blood processing system and a blood processing method involving the phosphate adsorbing agent for blood processing.
    Type: Application
    Filed: November 11, 2016
    Publication date: November 15, 2018
    Applicant: Asahi Kasei Medical Co., Ltd.
    Inventors: Naoki MORITA, Hiroshi TAJIMA, Ryou SASAKI, Hirokazu NAGAI, Akihiro OMORI
  • Patent number: 8748737
    Abstract: A concentrator photovoltaic device includes: an optical concentrator; a solar battery cell; a homogenizer; a sealant; and a light transmission preventing layer. The homogenizer has a trapezoidal shape in which a sectional area at the optical concentrator side is larger than a sectional area at the solar battery cell side, a relationship of nh>nf>nt is satisfied among a refractive index nh of the homogenizer, a refractive index nf of the sealant, and a refractive index nt of the light transmission preventing layer, a thickness (H) of the light transmission preventing layer is equal to or larger than 0.1 mm and equal to or smaller than 1.2 mm, and a relationship of 0.5?b/a<1.0 is satisfied between a height (b) of the light transmission preventing layer and a height (a) of the sealant at a position where the light transmission preventing layer is formed.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: June 10, 2014
    Assignee: Daido Tokushuko Kabushiki Kaisha
    Inventors: Hirokazu Nagai, Tomokazu Nakatani, Daichi Tokuyasu
  • Publication number: 20110284076
    Abstract: A concentrator photovoltaic device includes: an optical concentrator; a solar battery cell; a homogenizer; a sealant; and a light transmission preventing layer. The homogenizer has a trapezoidal shape in which a sectional area at the optical concentrator side is larger than a sectional area at the solar battery cell side, a relationship of nh>nf>nt is satisfied among a refractive index nh of the homogenizer, a refractive index nf of the sealant, and a refractive index nt of the light transmission preventing layer, a thickness (H) of the light transmission preventing layer is equal to or larger than 0.1 mm and equal to or smaller than 1.2 mm, and a relationship of 0.5?b/a<1.0 is satisfied between a height (b) of the light transmission preventing layer and a height (a) of the sealant at a position where the light transmission preventing layer is formed.
    Type: Application
    Filed: May 18, 2011
    Publication date: November 24, 2011
    Applicant: DAIDO TOKUSHUKO KABUSHIKI KAISHA
    Inventors: Hirokazu Nagai, Tomokazu Nakatani, Daichi Tokuyasu
  • Patent number: 6341943
    Abstract: A blower supplies compressed air to a predetermined place. The blower is provided with a plurality of compressors, a common air tank for storing compressed air supplied from the compressors, a changeover valve for switching the compressed air taken in from the air tank between a first supply state and a second supply state, and a controller for controlling operations of the compressors and the switching operation of the changeover valve. The controller can select one operation pattern from among a plurality of operation patterns determined by combinations between the compressors and the changeover valve.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: January 29, 2002
    Assignee: Nitto Kohki Co. Ltd.
    Inventors: Iwaji Shiomi, Giichiro Shimizu, Masaaki Tanabe, Hirokazu Nagai, Akira Takanaka