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).
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Patent number: 11889907Abstract: 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: GrantFiled: February 4, 2019Date of Patent: February 6, 2024Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Hiroyuki Inoue, Yohei Ishigami, Masato Kinoshita, Aya Ishihara, Yasunori Matsui, Hayato Kikuchi
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Publication number: 20230390792Abstract: 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: ApplicationFiled: November 19, 2021Publication date: December 7, 2023Inventors: Yohei ISHIGAMI, Makoto IMAI
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Patent number: 11786922Abstract: 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: GrantFiled: July 25, 2019Date of Patent: October 17, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tetsunori Aono, Jumpei Oe, Yohei Ishigami, Kana Shimizu, Takafumi Omori, Yukari Nakano, Takayuki Nakada
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Patent number: 11623230Abstract: 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: GrantFiled: July 24, 2018Date of Patent: April 11, 2023Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yohei Ishigami, Jumpei Oe, Yukari Nakano, Takafumi Omori, Tetsunori Aono, Kana Shimizu
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Publication number: 20220344912Abstract: 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: ApplicationFiled: July 16, 2020Publication date: October 27, 2022Inventors: Yohei ISHIGAMI, Takafumi OMORI, Tetsunori AONO, Sadahiko WAKABA, Takayuki NAKADA
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Patent number: 11400465Abstract: 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: GrantFiled: February 20, 2020Date of Patent: August 2, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hayato Kikuchi, Yasunori Matsui, Hiroyuki Inoue, Yohei Ishigami, Masato Kinoshita
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Publication number: 20210315349Abstract: 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: ApplicationFiled: February 4, 2019Publication date: October 14, 2021Inventors: Hiroyuki INOUE, Yohei ISHIGAMI, Masato KINOSHITA, Aya ISHIHARA, Yasunori MATSUI, Hayato KIKUCHl
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Publication number: 20210283625Abstract: 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: ApplicationFiled: July 25, 2019Publication date: September 16, 2021Inventors: Tetsunori AONO, Jumpei OE, Yohei ISHIGAMI, Kana SHIMIZU, Takafumi OMORI, Yukari NAKANO, Takayuki NAKADA
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Publication number: 20210268524Abstract: 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: ApplicationFiled: July 25, 2019Publication date: September 2, 2021Inventors: Yohei ISHIGAMI, Kana SHIMIZU, Takafumi OMORI, Yukari NAKANO, Tetsunori AONO, Jumpei OE
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Publication number: 20200353488Abstract: 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: ApplicationFiled: July 24, 2018Publication date: November 12, 2020Inventors: Yohei ISHIGAMI, Jumpei OE, Yukari NAKANO, Takafumi OMORI, Tetsunori AONO, Kana SHIMIZU
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Publication number: 20200269263Abstract: 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: ApplicationFiled: February 20, 2020Publication date: August 27, 2020Inventors: Hayato KIKUCHI, Yasunori MATSUI, Hiroyuki INOUE, Yohei ISHIGAMI, Masato KINOSHITA
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Patent number: D932451Type: GrantFiled: November 1, 2019Date of Patent: October 5, 2021Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yohei Ishigami, Takafumi Omori, Tetsunori Aono
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Patent number: D1014444Type: GrantFiled: September 23, 2021Date of Patent: February 13, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yohei Ishigami, Makoto Imai, Hidetoshi Hata, Takafumi Omori, Tetsunori Aono, Kenji Ogura, Yuki Takigawa
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Patent number: D1014445Type: GrantFiled: September 23, 2021Date of Patent: February 13, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yohei Ishigami, Makoto Imai, Hidetoshi Hata, Takafumi Omori, Tetsunori Aono, Kenji Ogura, Yuki Takigawa