Patents by Inventor Yohei ISHIGAMI

Yohei ISHIGAMI 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: 12358005
    Abstract: Voltage application device includes voltage application circuit. Voltage application circuit causes discharge electrode to generate a discharge by applying an application voltage to load that includes discharge electrode holding liquid. Voltage application circuit periodically changes a magnitude of the application voltage to generate a discharge intermittently. Voltage application circuit applies a maintaining voltage to load for suppressing contraction of liquid in addition to the application voltage during an intermittent period from a discharge to a next discharge.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: July 15, 2025
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yohei Ishigami, Kana Shimizu, Takafumi Omori, Yukari Nakano, Tetsunori Aono, Jumpei Oe
  • Patent number: 12107397
    Abstract: An electric discharge device according to the present disclosure includes a discharge electrode, a counter electrode, a voltage application circuit, and a liquid supply unit. The discharge electrode is a columnar electrode. The counter electrode faces the discharge electrode. The voltage application circuit applies an application voltage between the discharge electrode and the counter electrode. The liquid supply unit supplies liquid to the discharge electrode. The liquid extends and contracts along a central axis of the discharge electrode by discharge. The counter electrode includes a peripheral electrode part and a projecting electrode part. In a direction along the central axis of the discharge electrode, a tip of the liquid in a state in which the liquid extends is located at the same position as an outer peripheral edge of the peripheral electrode part or located closer to the discharge electrode than the outer peripheral edge.
    Type: Grant
    Filed: July 16, 2020
    Date of Patent: October 1, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yohei Ishigami, Takafumi Omori, Tetsunori Aono, Sadahiko Wakaba, Takayuki Nakada
  • Publication number: 20240322530
    Abstract: A discharge device includes discharge electrode, counter electrode, and a voltage application device. Discharge electrode includes distal end portion. Counter electrode is disposed so as to face distal end portion of discharge electrode with a gap provided therebetween. The voltage application device applies a voltage between discharge electrode and counter electrode to generate a discharge between discharge electrode and counter electrode. Discharge electrode protrudes toward counter electrode. Counter electrode includes discharge portion where a discharge occurs between discharge portion and distal end portion of discharge electrode. Discharge portion extends along a circumference centered at distal end portion of discharge electrode.
    Type: Application
    Filed: April 21, 2022
    Publication date: September 26, 2024
    Inventors: HIDETOSHI HATA, YOHEI ISHIGAMI, MAKOTO IMAI
  • Publication number: 20240301576
    Abstract: Gas generator includes decomposition unit and supply unit. Decomposition unit reacts with at least a portion of a supply liquid to generate at least one of hydrogen gas or oxygen gas. Supply unit collects moisture in the atmosphere, and supplies the collected moisture to decomposition unit as supply liquid.
    Type: Application
    Filed: January 18, 2022
    Publication date: September 12, 2024
    Inventors: Yohei ISHIGAMI, Makoto IMAI, Takahiro MIYATA, Yoshinori TANAKA
  • Publication number: 20240266807
    Abstract: Discharge device includes voltage application circuit that applies output voltage to load including discharge electrode holding liquid to generate discharge in discharge electrode. Voltage application circuit includes a function of varying a magnitude of output voltage, and a function of switching a discharge period that is a period for varying the magnitude of output voltage to any one of a plurality of periods having different lengths with a lapse of time.
    Type: Application
    Filed: April 21, 2022
    Publication date: August 8, 2024
    Inventors: Makoto IMAI, Hidetoshi HATA, Yohei ISHIGAMI, Takafumi OMORI, Yuki TAKIGAWA, Tetsunori AONO, Yutaka URATANI, Mikio ITO
  • Patent number: 11889907
    Abstract: A discharge device includes a discharge electrode, a counter electrode that faces the discharge electrode in a first direction, and voltage application unit that applies an application voltage between the discharge electrode and the counter electrode. The counter electrode includes a dome-shaped electrode having a recessed inner surface recessed to a side opposite to the discharge electrode in the first direction, and a protruding electrode that protrudes in a second direction intersecting the first direction from an opening edge of an opening of the dome-shaped electrode, the opening being provided at an end opposite to the discharge electrode. The discharge device forms a discharge path having at least partial dielectric breakdown between the discharge electrode and the protruding electrode, when the discharge occurs. The discharge path includes a first dielectric breakdown region generated around the discharge electrode and a second dielectric breakdown region generated around the protruding electrode.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: February 6, 2024
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroyuki Inoue, Yohei Ishigami, Masato Kinoshita, Aya Ishihara, Yasunori Matsui, Hayato Kikuchi
  • Publication number: 20230390792
    Abstract: Discharge device includes discharge electrode, voltage application circuit, and current limiting element. Discharge electrode is disposed to face counter electrode, and retains liquid. Voltage application circuit is electrically connected to discharge electrode and counter electrode with discharge electrode as a ground side. Voltage application circuit generates discharge between discharge electrode and counter electrode by applying a voltage between discharge electrode and counter electrode. Current limiting element is electrically connected to a side of discharge electrode opposite to counter electrode. Current limiting element limits a current flowing to discharge electrode.
    Type: Application
    Filed: November 19, 2021
    Publication date: December 7, 2023
    Inventors: Yohei ISHIGAMI, Makoto IMAI
  • Patent number: 11786922
    Abstract: A voltage application device includes a voltage application circuit. The voltage application circuit applies application voltage between discharge electrode and counter electrode which face each other with a clearance left from each other to generate a discharge. The voltage application device forms discharge path partially and dielectrically broken between discharge electrode and counter electrode when a discharge is generated. Discharge path includes first dielectric breakdown region formed around discharge electrode, and second dielectric breakdown region formed around counter electrode.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: October 17, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tetsunori Aono, Jumpei Oe, Yohei Ishigami, Kana Shimizu, Takafumi Omori, Yukari Nakano, Takayuki Nakada
  • Patent number: 11623230
    Abstract: Voltage application device includes voltage application circuit. Voltage application circuit applies a voltage to load including discharge electrode that holds liquid, voltage application circuit generating discharge in discharge electrode. During a drive period, voltage application circuit periodically changes a magnitude of the voltage applied to load at a drive frequency within a predetermined range including a resonance frequency of liquid, voltage application circuit mechanically vibrating liquid.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: April 11, 2023
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yohei Ishigami, Jumpei Oe, Yukari Nakano, Takafumi Omori, Tetsunori Aono, Kana Shimizu
  • Publication number: 20220344912
    Abstract: An electric discharge device according to the present disclosure includes a discharge electrode, a counter electrode, a voltage application circuit, and a liquid supply unit. The discharge electrode is a columnar electrode. The counter electrode faces the discharge electrode. The voltage application circuit applies an application voltage between the discharge electrode and the counter electrode. The liquid supply unit supplies liquid to the discharge electrode. The liquid extends and contracts along a central axis of the discharge electrode by discharge. The counter electrode includes a peripheral electrode part and a projecting electrode part. In a direction along the central axis of the discharge electrode, a tip of the liquid in a state in which the liquid extends is located at the same position as an outer peripheral edge of the peripheral electrode part or located closer to the discharge electrode than the outer peripheral edge.
    Type: Application
    Filed: July 16, 2020
    Publication date: October 27, 2022
    Inventors: Yohei ISHIGAMI, Takafumi OMORI, Tetsunori AONO, Sadahiko WAKABA, Takayuki NAKADA
  • Patent number: 11400465
    Abstract: An electrode device includes a discharge electrode and a counter electrode, and discharges when a voltage is applied across the discharge electrode and the counter electrode. The discharge electrode is a columnar electrode having a discharge portion on its front end. The counter electrode faces the discharge portion. The counter electrode has a peripheral electrode portion and a projecting electrode portion. The peripheral electrode portion is disposed to surround an axis of the discharge electrode. The projecting electrode portion projects from a part of the peripheral electrode portion toward the axis of the discharge electrode. A distance from the peripheral electrode portion to the discharge portion is shorter than a distance from the projecting electrode portion to the discharge portion.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: August 2, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hayato Kikuchi, Yasunori Matsui, Hiroyuki Inoue, Yohei Ishigami, Masato Kinoshita
  • Publication number: 20210315349
    Abstract: A discharge device includes a discharge electrode, a counter electrode that faces the discharge electrode in a first direction, and voltage application unit that applies an application voltage between the discharge electrode and the counter electrode. The counter electrode includes a dome-shaped electrode having a recessed inner surface recessed to a side opposite to the discharge electrode in the first direction, and a protruding electrode that protrudes in a second direction intersecting the first direction from an opening edge of an opening of the dome-shaped electrode, the opening being provided at an end opposite to the discharge electrode. The discharge device forms a discharge path having at least partial dielectric breakdown between the discharge electrode and the protruding electrode, when the discharge occurs. The discharge path includes a first dielectric breakdown region generated around the discharge electrode and a second dielectric breakdown region generated around the protruding electrode.
    Type: Application
    Filed: February 4, 2019
    Publication date: October 14, 2021
    Inventors: Hiroyuki INOUE, Yohei ISHIGAMI, Masato KINOSHITA, Aya ISHIHARA, Yasunori MATSUI, Hayato KIKUCHl
  • Publication number: 20210283625
    Abstract: A voltage application device includes a voltage application circuit. The voltage application circuit applies application voltage between discharge electrode and counter electrode which face each other with a clearance left from each other to generate a discharge. The voltage application device forms discharge path partially and dielectrically broken between discharge electrode and counter electrode when a discharge is generated. Discharge path includes first dielectric breakdown region formed around discharge electrode, and second dielectric breakdown region formed around counter electrode.
    Type: Application
    Filed: July 25, 2019
    Publication date: September 16, 2021
    Inventors: Tetsunori AONO, Jumpei OE, Yohei ISHIGAMI, Kana SHIMIZU, Takafumi OMORI, Yukari NAKANO, Takayuki NAKADA
  • Publication number: 20210268524
    Abstract: Voltage application device includes voltage application circuit. Voltage application circuit causes discharge electrode to generate a discharge by applying an application voltage to load that includes discharge electrode holding liquid. Voltage application circuit periodically changes a magnitude of the application voltage to generate a discharge intermittently. Voltage application circuit applies a maintaining voltage to load for suppressing contraction of liquid in addition to the application voltage during an intermittent period from a discharge to a next discharge.
    Type: Application
    Filed: July 25, 2019
    Publication date: September 2, 2021
    Inventors: Yohei ISHIGAMI, Kana SHIMIZU, Takafumi OMORI, Yukari NAKANO, Tetsunori AONO, Jumpei OE
  • Publication number: 20200353488
    Abstract: Voltage application device includes voltage application circuit. Voltage application circuit applies a voltage to load including discharge electrode that holds liquid, voltage application circuit generating discharge in discharge electrode. During a drive period, voltage application circuit periodically changes a magnitude of the voltage applied to load at a drive frequency within a predetermined range including a resonance frequency of liquid, voltage application circuit mechanically vibrating liquid.
    Type: Application
    Filed: July 24, 2018
    Publication date: November 12, 2020
    Inventors: Yohei ISHIGAMI, Jumpei OE, Yukari NAKANO, Takafumi OMORI, Tetsunori AONO, Kana SHIMIZU
  • Publication number: 20200269263
    Abstract: An electrode device includes a discharge electrode and a counter electrode, and discharges when a voltage is applied across the discharge electrode and the counter electrode. The discharge electrode is a columnar electrode having a discharge portion on its front end. The counter electrode faces the discharge portion. The counter electrode has a peripheral electrode portion and a projecting electrode portion. The peripheral electrode portion is disposed to surround an axis of the discharge electrode. The projecting electrode portion projects from a part of the peripheral electrode portion toward the axis of the discharge electrode. A distance from the peripheral electrode portion to the discharge portion is shorter than a distance from the projecting electrode portion to the discharge portion.
    Type: Application
    Filed: February 20, 2020
    Publication date: August 27, 2020
    Inventors: Hayato KIKUCHI, Yasunori MATSUI, Hiroyuki INOUE, Yohei ISHIGAMI, Masato KINOSHITA
  • Patent number: D932451
    Type: Grant
    Filed: November 1, 2019
    Date of Patent: October 5, 2021
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yohei Ishigami, Takafumi Omori, Tetsunori Aono
  • Patent number: D1014444
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: February 13, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yohei Ishigami, Makoto Imai, Hidetoshi Hata, Takafumi Omori, Tetsunori Aono, Kenji Ogura, Yuki Takigawa
  • Patent number: D1014445
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: February 13, 2024
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yohei Ishigami, Makoto Imai, Hidetoshi Hata, Takafumi Omori, Tetsunori Aono, Kenji Ogura, Yuki Takigawa