Patents by Inventor Ryosuke Maeda

Ryosuke Maeda 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: 20250158539
    Abstract: In a bidirectional switch of a power converter, a first terminal thereof is connected to a connection node between a first switching element and a second switching element. A resonant capacitor is connected between the first terminal of the bidirectional switch and a second DC terminal. A resonant inductor is connected to a second terminal of the bidirectional switch. A regenerative element is connected between the resonant inductor and the second DC terminal. A first control unit controls the first switching element and the second switching element. A second control unit controls the bidirectional switch. A limiter limits the absolute value of a voltage variation rate of a voltage applied between the first and second terminals of the bidirectional switch to a threshold value or less.
    Type: Application
    Filed: January 17, 2023
    Publication date: May 15, 2025
    Inventors: Ryosuke MAEDA, Koji HIGASHIYAMA
  • Patent number: 12191848
    Abstract: A control circuit controls a switching element including a gate and a source corresponding to the gate. The control circuit includes an inductor, a circuit element, and a resistor. The inductor is connected between the gate and the source of the switching element. The circuit element is connected in series to the inductor between the gate and the source. The circuit element allows an electric current to flow therethrough in response to generation of electromotive force in the inductor. The resistor is connected in parallel to the inductor and the circuit element between the gate and the source.
    Type: Grant
    Filed: April 5, 2021
    Date of Patent: January 7, 2025
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Ryosuke Maeda, Yusuke Kinoshita, Hidetoshi Ishida
  • Patent number: 12143098
    Abstract: A power loss of a switching device is suppressed. Circuit for a switching device is used in switching device. Switching device includes first path and second path. First path includes first field effect transistor and first inductor. Second path includes second field effect transistor and second inductor. First path and second path are connected in parallel to power supply. A first maximum current that is a maximum current during conduction of first field effect transistor is smaller than a second maximum current that is a maximum current during conduction of second field effect transistor. Circuit for a switching device includes processing part. Processing part executes a specific operation according to a voltage difference between voltage across first inductor and voltage across second inductor.
    Type: Grant
    Filed: April 5, 2021
    Date of Patent: November 12, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yusuke Kinoshita, Yuta Nagatomi, Ryosuke Maeda, Satoshi Nakazawa
  • Patent number: 12123665
    Abstract: In cooling/heating cycles of a heat exchanger, to prevent cracks that tend to occur in a brazed portion between an end portion of a horizontal cross-section of a tube and a header plate. An end portion cover body is provided for an end portion of a tank main body or a header to cover hereby an end portion in a longer side direction of an opening end portion of a flat tube.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: October 22, 2024
    Assignee: T.RAD CO., LTD.
    Inventors: Yosuke Taniguchi, Ryosuke Maeda
  • Publication number: 20240313759
    Abstract: An on-state voltage measurement circuit includes a detecting switch element, a control unit, a resistive element, and a voltage detection unit. The control unit includes a signal output terminal and a reference potential terminal and controls the detecting switch element. The resistive element is connected between a source terminal of the detecting switch element and the reference potential terminal. A resistance value of the resistive element is greater than an on-state resistance of the detecting switch element. The control unit turns the detecting switch element on when the semiconductor switch element is turned on. The voltage detection unit detects, based on a voltage across the resistive element when the semiconductor switch element and the detecting switch element are both on, the on-state voltage of the semiconductor switch element connected between a drain terminal of the detecting switch element and the reference potential terminal.
    Type: Application
    Filed: February 22, 2022
    Publication date: September 19, 2024
    Inventors: Ryosuke MAEDA, Yusuke KINOSHITA, Satoshi NAKAZAWA
  • Publication number: 20240259018
    Abstract: In a switch system, a voltage clamping element is connected to a semiconductor switch in parallel. An active clamping circuit is connected between a control terminal and a first main terminal of the semiconductor switch. The active clamping circuit includes a first diode, a second diode, and a control switch. A second anode of the second diode is connected to a first anode of the first diode. The control switch is connected between the first anode of the first diode and the control terminal of the semiconductor switch. A second control unit controls the control switch. A breakdown voltage of the first diode is smaller than a clamp voltage of the voltage clamping element.
    Type: Application
    Filed: March 24, 2022
    Publication date: August 1, 2024
    Inventors: Yusuke KINOSHITA, Ryosuke MAEDA, Satoshi NAKAZAWA
  • Patent number: 11992240
    Abstract: A puncture system that is configured to automatically puncture a radial artery of a hand of a patient includes: a grip to be gripped by the hand; a blood vessel detection unit that detects a position of an artery of the hand that grips the grip; an adjustment mechanism that adjusts a relative posture of the grip and a puncture needle a forward mechanism to move the puncture needle forward toward the grip; and a control unit that determines, in accordance with the position of the artery detected by the blood vessel detection unit, a relative posture of the grip and the puncture needle and a forward distance of the puncture needle, and controls operations of the adjustment mechanism and the forward mechanism on the basis of the posture and the forward distance having been determined.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: May 28, 2024
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Ryosuke Ueda, Takashi Kumazawa, Ryosuke Maeda, Toshiaki Shinohara, Masaaki Watanabe, Yuusuke Uchida
  • Publication number: 20230145803
    Abstract: A control circuit controls a switching element including a gate and a source corresponding to the gate. The control circuit includes an inductor, a circuit element, and a resistor. The inductor is connected between the gate and the source of the switching element. The circuit element is connected in series to the inductor between the gate and the source. The circuit element allows an electric current to flow therethrough in response to generation of electromotive force in the inductor. The resistor is connected in parallel to the inductor and the circuit element between the gate and the source.
    Type: Application
    Filed: April 5, 2021
    Publication date: May 11, 2023
    Inventors: Ryosuke MAEDA, Yusuke KINOSHITA, Hidetoshi ISHIDA
  • Publication number: 20220268533
    Abstract: In cooling/heating cycles of a heat exchanger, to prevent cracks that tend to occur in a brazed portion between an end portion of a horizontal cross-section of a tube and a header plate. An end portion cover body is provided for an end portion of a tank main body or a header to cover hereby an end portion in a longer side direction of an opening end portion of a flat tube.
    Type: Application
    Filed: June 26, 2020
    Publication date: August 25, 2022
    Inventors: Yosuke TANIGUCHI, Ryosuke MAEDA
  • Patent number: 11391308
    Abstract: A work vehicle includes: a hydraulic pump driven by an engine; a hydraulic actuator that is driven by hydraulic oil supplied from the hydraulic pump; a switching valve configured to switch from one to the other of a first state in which the hydraulic oil supplied from the hydraulic pump is supplied to a first channel and a second state in which the hydraulic oil supplied from the hydraulic pump is supplied to a second channel; a restriction operation device configured to generate an operation signal that restricts the drive of the hydraulic actuator; and a controller that controls the switching valve. The controller includes: an operation signal acquisition unit configured to acquire the operation signal; and an instruction output unit configured to output, to the switching valve, a control instruction that restricts the drive of the hydraulic actuator with the engine driving, in response to the operation signal.
    Type: Grant
    Filed: April 11, 2018
    Date of Patent: July 19, 2022
    Assignee: Komatsu Ltd.
    Inventors: Yushi Tanaka, Ryosuke Maeda, Masaaki Imaizumi
  • Patent number: 11083467
    Abstract: A hemostatic device includes a band for wrapping around a puncture site of a wrist, a mechanism for securing the band to the wrist in a wrapped state, an inflatable portion connected to the band and inflated by being injected with air, a tube body that communicates between an inflatable space of the inflatable portion and an outside, and a cover portion that covers the tube body in the inflatable portion, in which the tube body has a hole portion that opens in the inflatable portion, the cover portion has a communication portion that is disposed to cover the hole portion and allows communication between the hole portion and the inflatable portion by being positioned to overlap the hole portion, and the tube body is movable relative to the cover portion so that a positional relation between the communication portion and the hole portion is controllable.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: August 10, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Kenichi Hazama, Ryosuke Maeda, Junichi Kobayashi
  • Patent number: 11065010
    Abstract: A hemostatic device includes a band for wrapping around a puncture site of a wrist, a mechanism for securing the band to the wrist in a wrapped state, an inflatable portion connected to the band and inflated by being injected with gas, an injection part which is elastically transformable and is capable of injecting air into the inflatable portion, and a tube body that connects an inflatable space of the inflatable portion and a housing space of the injection part to each other, in which the tube body has a hole portion opening in the inflatable portion and a cover portion disposed on the tube body to cover the hole portion, and the cover portion has a communication portion that allows communication between the inflatable space and the housing space by air discharged from the hole portion when air is injected into the inflatable portion from the injection part.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: July 20, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Ryosuke Maeda, Kenichi Hazama, Junichi Kobayashi
  • Publication number: 20210180623
    Abstract: A work vehicle includes: a hydraulic pump driven by an engine; a hydraulic actuator that is driven by hydraulic oil supplied from the hydraulic pump; a switching valve configured to switch from one to the other of a first state in which the hydraulic oil supplied from the hydraulic pump is supplied to a first channel and a second state in which the hydraulic oil supplied from the hydraulic pump is supplied to a second channel; a restriction operation device configured to generate an operation signal that restricts the drive of the hydraulic actuator; and a controller that controls the switching valve. The controller includes: an operation signal acquisition unit configured to acquire the operation signal; and an instruction output unit configured to output, to the switching valve, a control instruction that restricts the drive of the hydraulic actuator with the engine driving, in response to the operation signal.
    Type: Application
    Filed: April 11, 2018
    Publication date: June 17, 2021
    Inventors: Yushi Tanaka, Ryosuke Maeda, Masaaki Imaizumi
  • Patent number: 10980546
    Abstract: A hemostatic device including a band that is wrapped around a limb of a living body at a site of the living body where bleeding is to be stopped and an inflatable portion which is inflated by injection of gas to cause the inflatable portion to press the site where bleeding is to be stopped. The hemostatic device includes an injection part that injects gas into the interior of the inflatable portion. The injection part includes a hole penetrating the injection part and communicating the housing space with outside environment. The hemostatic device includes a first support plate and a second support plate positioned adjacent one another along the longitudinal direction of the band. The second support plate is movably connected to the first support plate. The inflatable portion is on the first support plate and the injection part is on the second support plate.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: April 20, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Kenichi Hazama, Teppei Hayashi, Ryosuke Maeda, Junichi Kobayashi, Masako Miyashita, Satoshi Wada
  • Publication number: 20210085362
    Abstract: A puncture system that is configured to automatically puncture a radial artery of a hand of a patient includes: a grip to be gripped by the hand; a blood vessel detection unit that detects a position of an artery of the hand that grips the grip; an adjustment mechanism that adjusts a relative posture of the grip and a puncture needle a forward mechanism to move the puncture needle forward toward the grip; and a control unit that determines, in accordance with the position of the artery detected by the blood vessel detection unit, a relative posture of the grip and the puncture needle and a forward distance of the puncture needle, and controls operations of the adjustment mechanism and the forward mechanism on the basis of the posture and the forward distance having been determined.
    Type: Application
    Filed: December 3, 2020
    Publication date: March 25, 2021
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Ryosuke UEDA, Takashi KUMAZAWA, Ryosuke MAEDA, Toshiaki SHINOHARA, Masaaki WATANABE, Yuusuke UCHIDA
  • Patent number: 10939919
    Abstract: A hemostatic device has a band for being wrapped around a puncture site P of a wrist W, securing means for securing the band in a state where the band is wrapped around the wrist, an inflation portion that interlocks with the band, and that is inflated by injecting gas, and an injection portion that can inject gas into the inflation portion. The injection portion is disposed in the band, and is foldable so as to decrease a space formed inside the injection portion. The hemostatic device can thus inflate an inflation portion without using a separate dedicated instrument, which can prevent a hemostasis-requiring site from being unintentionally compressed more than necessary.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: March 9, 2021
    Assignee: TERUMO KABUSHIKI KAISHA
    Inventors: Kenichi Hazama, Ryosuke Maeda
  • Publication number: 20190150938
    Abstract: A hemostatic device including a band that is wrapped around a limb of a living body at a site of the living body where bleeding is to be stopped and an inflatable portion which is inflated by injection of gas to cause the inflatable portion to press the site where bleeding is to be stopped. The hemostatic device includes an injection part that injects gas into the interior of the inflatable portion. The injection part includes a hole penetrating the injection part and communicating the housing space with outside environment. The hemostatic device includes a first support plate and a second support plate positioned adjacent one another along the longitudinal direction of the band. The second support plate is movably connected to the first support plate. The inflatable portion is on the first support plate and the injection part is on the second support plate.
    Type: Application
    Filed: January 3, 2019
    Publication date: May 23, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Kenichi HAZAMA, Teppei HAYASHI, Ryosuke MAEDA, Junichi KOBAYASHI, Masako MIYASHITA, Satoshi WADA
  • Publication number: 20190133605
    Abstract: A hemostatic device includes a band for wrapping around a puncture site of a wrist, a mechanism for securing the band to the wrist in a wrapped state, an inflatable portion connected to the band and inflated by being injected with air, a tube body that communicates between an inflatable space of the inflatable portion and an outside, and a cover portion that covers the tube body in the inflatable portion, in which the tube body has a hole portion that opens in the inflatable portion, the cover portion has a communication portion that is disposed to cover the hole portion and allows communication between the hole portion and the inflatable portion by being positioned to overlap the hole portion, and the tube body is movable relative to the cover portion so that a positional relation between the communication portion and the hole portion is controllable.
    Type: Application
    Filed: January 2, 2019
    Publication date: May 9, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Kenichi HAZAMA, Ryosuke MAEDA, Junichi KOBAYASHI
  • Publication number: 20190133604
    Abstract: A hemostatic device includes a band for wrapping around a puncture site of a wrist , a mechanism for securing the band to the wrist in a wrapped state, an inflatable portion connected to the band and inflated by being injected with gas, an injection part which is elastically transformable and is capable of injecting air into the inflatable portion, and a tube body that connects an inflatable space of the inflatable portion and a housing space of the injection part to each other, in which the tube body has a hole portion opening in the inflatable portion and a cover portion disposed on the tube body to cover the hole portion, and the cover portion has a communication portion that allows communication between the inflatable space and the housing space by air discharged from the hole portion when air is injected into the inflatable portion from the injection part.
    Type: Application
    Filed: January 2, 2019
    Publication date: May 9, 2019
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Ryosuke MAEDA, Kenichi HAZAMA, Junichi KOBAYASHI
  • Publication number: 20180008282
    Abstract: A hemostatic device has a band for being wrapped around a puncture site P of a wrist W, securing means for securing the band in a state where the band is wrapped around the wrist, an inflation portion that interlocks with the band, and that is inflated by injecting gas, and an injection portion that can inject gas into the inflation portion. The injection portion is disposed in the band, and is foldable so as to decrease a space formed inside the injection portion. The hemostatic device can thus inflate an inflation portion without using a separate dedicated instrument, which can prevent a hemostasis-requiring site from being unintentionally compressed more than necessary.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 11, 2018
    Applicant: TERUMO KABUSHIKI KAISHA
    Inventors: Kenichi HAZAMA, Ryosuke MAEDA