Patents by Inventor Kiyoshi Yamamoto

Kiyoshi Yamamoto 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: 20240360577
    Abstract: The present disclosure provides a cathode electrode in which selectivity of hydrogen decreases and selectivity of a carbon dioxide reduction product increases in a catalytic reaction producing carbon monoxide, an olefinic hydrocarbon such as ethylene, and an alcohol such as ethanol by a reduction reaction of carbon dioxide. A cathode electrode that electrically reduces carbon dioxide, including: a first layer containing cuprous oxide, copper, and at least one additional metal element selected from the group consisting of silver, gold, zinc, cadmium, and tin; and a second layer formed on the first layer and containing a constituent element composed of at least one metal element selected from the group consisting of copper, silver, gold, zinc, cadmium, and tin.
    Type: Application
    Filed: July 11, 2024
    Publication date: October 31, 2024
    Applicants: FURUKAWA ELECTRIC CO., LTD., THE UNIVERSITY OF TOKYO, CHIYODA CORPORATION
    Inventors: Takahiro YAMAMOTO, Yu MIMURA, Kiyoshi YAMAMOTO, Masakazu SUGIYAMA, Tsutomu MINEGISHI, Jun MATSUMOTO, Dai TAKEDA
  • Patent number: 11701026
    Abstract: Provided is a respiratory state estimating device including a pulse wave signal acquiring unit that acquires a pulse wave signal from a portion of a living subject, a pulse rate calculating unit that calculates a pulse rate of the living subject based on the pulse wave signal, and a respiratory state estimating unit that estimates a respiratory state of the living subject based on the pulse rate. Also, provided is a respiratory state estimating method including optically acquiring a pulse wave signal from a portion of a living subject, calculating a pulse rate of the living subject based on the pulse wave signal, estimating a respiratory state of the living subject from the pulse rate.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: July 18, 2023
    Assignee: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Yoshihiro Noguchi, Kiyoshi Yamamoto, Masaya Yamashita
  • Publication number: 20230193977
    Abstract: A torsional-vibration-reducing-device manufacturing method includes: molding an input rotating member and an output rotating member through punching press machining and bending press machining performed on plate materials; performing heat treatment on the molded input rotating member and the molded output rotating member; and assembling a damper product that includes, as components, the input rotating member and the output rotating member on which heat treatment has been performed, and a coil spring. The molding includes drilling processing for forming a hole opened in an outer-diameter direction with respect to the center line of rotation, at a position of at least one rotating member of the input rotating member and the output rotating member, the position serving as a spring holding section for holding the coil spring. The method further include cleaning the damper product with a cleaning solution and removing the cleaning solution remaining after the cleaning.
    Type: Application
    Filed: May 11, 2021
    Publication date: June 22, 2023
    Applicant: VALEO KAPEC JAPAN KK
    Inventors: Kiyoshi YAMAMOTO, Takashi FUJITA, Hiroki YANAGISAWA
  • Patent number: 11648736
    Abstract: A three-dimensional shaping apparatus includes an ejection portion, a base stage, a movement portion, and a controller. The ejection portion configured to eject a fused thermoplastic resin. The movement portion configured to change relative positions of the ejection portion and the base stage. The controller configured to control the movement portion and the ejection portion such that a wall is formed by ejecting a fused thermoplastic resin from the ejection portion while relatively moving the ejection portion with respect to the base stage to provide a space surrounded by the wall in a horizontal direction and open in an upward direction, and such that a filling portion is formed by injecting a fused thermoplastic resin into the space from above.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: May 16, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hitoshi Murao, Yoshiyuki Beniya, Kiyoshi Yamamoto
  • Publication number: 20220381327
    Abstract: A damper device includes an input-side rotating member, an intermediate rotating member, an output-side rotating member, and an elastic body. The elastic body is located in a clearance in a circumferential direction between each of a plurality of corresponding portions in which a hook portion of the input-side rotating member and a hook portion of the output-side rotating member face each other and the intermediate rotating member. A part of the corresponding portions is a first corresponding portion configured in such a manner that the elastic body is separated from the output-side rotating member and in contact with the input-side rotating member. The remainder of the corresponding portions is a second corresponding portion configured in such a manner that the elastic body is separated from the input-side rotating member and is in contact with the output-side rotating member.
    Type: Application
    Filed: April 8, 2022
    Publication date: December 1, 2022
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, VALEO KAPEC JAPAN K.K.
    Inventors: Isamu HACHISUWA, Atsushi MUTO, Takashi FUJITA, Kiyoshi YAMAMOTO
  • Publication number: 20220356588
    Abstract: The present disclosure provides a cathode electrode that can stably sustain a catalytic reaction producing an olefinic hydrocarbon such as ethylene and an alcohol such as ethanol by a reduction reaction of carbon dioxide over a long term. A cathode electrode that electrically reduces carbon dioxide, including cuprous oxide, copper, and at least one additional metal element selected from the group consisting of silver, gold, zinc, and cadmium.
    Type: Application
    Filed: July 26, 2022
    Publication date: November 10, 2022
    Applicants: RIKEN, CHIYODA CORPORATION, FURUKAWA ELECTRIC CO., LTD.
    Inventors: Katsushi FUJII, Kayo KOIKE, Ryuhei NAKAMURA, Satoshi WADA, Dai TAKEDA, Jun MATSUMOTO, Eri TORIKAI, Takahiro YAMAMOTO, Yu MIMURA, Kiyoshi YAMAMOTO, Shinsuke NISHIDA
  • Patent number: 11183955
    Abstract: The present invention addresses the problem of providing a method which makes it possible to simply evaluate an output of an initial position detection signal for a permanent magnetic field, along with providing a method for correcting errors that occur in the initial position detection signal. As a means for solving said problem, an MPU (51) obtains a correction value in which an offset error has been corrected by multiplying a first measurement value or a second measurement value, which are measured for each conduction pattern when an offset error occurs during position detection of a permanent magnetic field, by a correction coefficient A and estimates the position of the permanent magnetic field on the basis of the correction value.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: November 23, 2021
    Assignee: HOKUTO CONTROL CO., LTD.
    Inventor: Kiyoshi Yamamoto
  • Publication number: 20210297020
    Abstract: The present invention addresses the problem of providing a method which makes it possible to simply evaluate an output of an initial position detection signal for a permanent magnetic field, along with providing a method for correcting errors that occur in the initial position detection signal. As a means for solving said problem, an MPU (51) obtains a correction value in which an offset error has been corrected by multiplying a first measurement value or a second measurement value, which are measured for each conduction pattern when an offset error occurs during position detection of a permanent magnetic field, by a correction coefficient A and estimates the position of the permanent magnetic field on the basis of the correction value.
    Type: Application
    Filed: December 12, 2017
    Publication date: September 23, 2021
    Inventor: Kiyoshi YAMAMOTO
  • Patent number: 11050370
    Abstract: The present invention addresses the problem of providing a method for detecting a magnetic field location in an electric motor, said method making it possible to lower costs using simple hardware and software, and instantaneously detect permanent-magnet field location. As a means for solving said problem, an MPU (51) sequentially selects one from six conduction patterns using a phase at which one-phase conduction occurs without branching at a neutral point among three-phase coils as a phase to be measured, applies a sensing current to the three-phase coils, and uses a timer (56) to measure a pulse-width time until the coil current detected by a current sensor (53) reaches a current threshold, and stores the same as measurement data.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: June 29, 2021
    Assignee: HOKUTO CONTROL CO., LTD.
    Inventor: Kiyoshi Yamamoto
  • Publication number: 20210128017
    Abstract: Provided is a respiratory state estimating device including a pulse wave signal acquiring unit that acquires a pulse wave signal from a portion of a living subject, a pulse rate calculating unit that calculates a pulse rate of the living subject based on the pulse wave signal, and a respiratory state estimating unit that estimates a respiratory state of the living subject based on the pulse rate. Also, provided is a respiratory state estimating method including optically acquiring a pulse wave signal from a portion of a living subject, calculating a pulse rate of the living subject based on the pulse wave signal, estimating a respiratory state of the living subject from the pulse rate.
    Type: Application
    Filed: January 13, 2021
    Publication date: May 6, 2021
    Inventors: Yoshihiro NOGUCHI, Kiyoshi YAMAMOTO, Masaya YAMASHITA
  • Publication number: 20210114286
    Abstract: A three-dimensional shaping apparatus includes an ejection portion, a base stage, a movement portion, and a controller. The ejection portion configured to eject a fused thermoplastic resin. The movement portion configured to change relative positions of the ejection portion and the base stage. The controller configured to control the movement portion and the ejection portion such that a wall is formed by ejecting a fused thermoplastic resin from the ejection portion while relatively moving the ejection portion with respect to the base stage to provide a space surrounded by the wall in a horizontal direction and open in an upward direction, and such that a filling portion is formed by injecting a fused thermoplastic resin into the space from above.
    Type: Application
    Filed: December 28, 2020
    Publication date: April 22, 2021
    Inventors: Hitoshi Murao, Yoshiyuki Beniya, Kiyoshi Yamamoto
  • Patent number: 10906234
    Abstract: A three-dimensional shaping apparatus includes an ejection portion, a base stage, a movement portion, and a controller. The ejection portion configured to eject a fused thermoplastic resin. The movement portion configured to change relative positions of the ejection portion and the base stage. The controller configured to control the movement portion and the ejection portion such that a wall is formed by ejecting a fused thermoplastic resin from the ejection portion while relatively moving the ejection portion with respect to the base stage to provide a space surrounded by the wall in a horizontal direction and open in an upward direction, and such that a filling portion is formed by injecting a fused thermoplastic resin into the space from above.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: February 2, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hitoshi Murao, Yoshiyuki Beniya, Kiyoshi Yamamoto
  • Patent number: 10855212
    Abstract: The present invention addresses the problem of providing a method for detecting magnetic field location which can realize low cost by using simple hardware and software and can detect a rotor location in units of excitation sections in 120°-energization without generating sensing noise at the time of initiation. As a solution, an MPU (51) obtains, through calculation, a neutral point potential from an energization-phase voltage measured by an A/D conversion circuit (53), obtains the difference between the neutral point potential and a non-energization-phase voltage, performs magnitude comparison between the difference and a negative-side threshold value in the case where the present location is an odd-numbered section or between the difference and a positive-side threshold value in the case where the present location is an even-numbered section, and determines the end point of the 60°-energization section when the difference exceeds a threshold value in a direction away from the neutral point potential.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: December 1, 2020
    Assignee: HOKUTO CONTROL CO., LTD.
    Inventor: Kiyoshi Yamamoto
  • Patent number: 10840834
    Abstract: The present invention addresses the problem of proposing a method for driving a sensorless motor, wherein the method is different from a conventional rotor position estimation method according to a time axis and performs rotor position estimation according to an angle axis, thus making it possible for excitation switching to always be achieved at an optimal angle in response to a change in speed. According to the present invention, an MCU (5) starts excitation of a coil at an excitation section starting point, measures an induced voltage component generated in the coil by a certain period of energization, integrates the voltage component, and sets an excitation section ending position when the integral value reaches zero. In addition, the motor is continuously rotated by repeating the same integration operation by switching to an excitation pattern in the next excitation section.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: November 17, 2020
    Assignee: HOKUTO CONTROL CO., LTD.
    Inventor: Kiyoshi Yamamoto
  • Patent number: 10786778
    Abstract: A power supply control device of a nitrogen gas generator includes: a pipe having a nitrogen gas inlet for receiving input of nitrogen gas from a nitrogen gas generator that compresses air by a compressor to separate the nitrogen gas from the air, and a nitrogen gas outlet for outputting, to outside, the nitrogen gas received by the nitrogen gas inlet; a pressure gauge that measures pressure inside the pipe; a flowmeter that measures a flow rate of the nitrogen gas flowing inside the pipe; and a control unit that controls supply of power to the compressor and shut-off of the supply of the power in accordance with a measurement result of at least one of the pressure gauge and the flowmeter.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: September 29, 2020
    Assignee: SYSTEM INSTRUMENTS CO., LTD.
    Inventors: Kiyoshi Yamamoto, Yoshihisa Ujima, Takeshi Akiba
  • Publication number: 20200136536
    Abstract: The present invention addresses the problem of providing a method for detecting magnetic field location which can realize low cost by using simple hardware and software and can detect a rotor location in units of excitation sections in 120°-energization without generating sensing noise at the time of initiation. As a solution, an MPU (51) obtains, through calculation, a neutral point potential from an energization-phase voltage measured by an A/D conversion circuit (53), obtains the difference between the neutral point potential and a non-energization-phase voltage, performs magnitude comparison between the difference and a negative-side threshold value in the case where the present location is an odd-numbered section or between the difference and a positive-side threshold value in the case where the present location is an even-numbered section, and determines the end point of the 60°-energization section when the difference exceeds a threshold value in a direction away from the neutral point potential.
    Type: Application
    Filed: March 28, 2018
    Publication date: April 30, 2020
    Inventor: Kiyoshi YAMAMOTO
  • Publication number: 20190372489
    Abstract: The present invention addresses the problem of proposing a method for driving a sensorless motor, wherein the method is different from a conventional rotor position estimation method according to a time axis and performs rotor position estimation according to an angle axis, thus making it possible for excitation switching to always be achieved at an optimal angle in response to a change in speed. According to the present invention, an MCU (5) starts excitation of a coil at an excitation section starting point, measures an induced voltage component generated in the coil by a certain period of energization, integrates the voltage component, and sets an excitation section ending position when the integral value reaches zero. In addition, the motor is continuously rotated by repeating the same integration operation by switching to an excitation pattern in the next excitation section.
    Type: Application
    Filed: December 22, 2017
    Publication date: December 5, 2019
    Inventor: Kiyoshi YAMAMOTO
  • Publication number: 20190253009
    Abstract: The present invention addresses the problem of providing a method for detecting a magnetic field location in an electric motor, said method making it possible to lower costs using simple hardware and software, and instantaneously detect permanent-magnet field location. As a means for solving said problem, an MPU (51) sequentially selects one from six conduction patterns using a phase at which one-phase conduction occurs without branching at a neutral point among three-phase coils as a phase to be measured, applies a sensing current to the three-phase coils, and uses a timer (56) to measure a pulse-width time until the coil current detected by a current sensor (53) reaches a current threshold, and stores the same as measurement data.
    Type: Application
    Filed: November 8, 2017
    Publication date: August 15, 2019
    Inventor: Kiyoshi YAMAMOTO
  • Publication number: 20190069780
    Abstract: An estimating device to estimate blood oxygen concentration of a living body including: an acquiring unit to acquire optical information from the living body; a converting unit to convert a signal included in the optical information into a first color-difference signal; and a calculating unit to calculate the blood oxygen concentration of the living body based on the first color-difference signal is provided. Also, the acquiring unit may acquire optical information based on reflected light from the living body. Furthermore, the converting unit may convert a signal included in the optical information into a second color-difference signal that is different from the first color-difference signal; and the calculating unit may calculate the blood oxygen concentration based on the first color-difference signal and the second color-difference signal.
    Type: Application
    Filed: October 28, 2018
    Publication date: March 7, 2019
    Inventors: Kiyoshi YAMAMOTO, Yoshihiro NOGUCHI
  • Publication number: 20180353897
    Abstract: A power supply control device of a nitrogen gas generator includes: a pipe having a nitrogen gas inlet for receiving input of nitrogen gas from a nitrogen gas generator that compresses air by a compressor to separate the nitrogen gas from the air, and a nitrogen gas outlet for outputting, to outside, the nitrogen gas received by the nitrogen gas inlet; a pressure gauge that measures pressure inside the pipe; a flowmeter that measures a flow rate of the nitrogen gas flowing inside the pipe; and a control unit that controls supply of power to the compressor and shut-off of the supply of the power in accordance with a measurement result of at least one of the pressure gauge and the flowmeter.
    Type: Application
    Filed: January 15, 2016
    Publication date: December 13, 2018
    Applicant: SYSTEM INSTRUMENTS CO., LTD.
    Inventors: Kiyoshi YAMAMOTO, Yoshihisa UJIMA, Takeshi AKIBA