Patents by Inventor Michiko Hashimoto
Michiko Hashimoto 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: 11305992Abstract: An ozone generation device includes an inverter, an ozone generator, and a reactor. The inverter turns on and off a switching element by pulse width modulation (PWM) control to convert DC power into AC power. In the ozone generator, voltage of the AC power is applied to a dielectric electrode, and discharge is generated in raw material gas flowing in a discharge gap between the dielectric electrode and a metal electrode, so that ozone is generated by the discharge. The reactor is connected in series to a dielectric electrode, and reduces an inrush current that flows through the dielectric electrode when the switching element is switched from off to on by the PWM control by the inverter.Type: GrantFiled: September 19, 2017Date of Patent: April 19, 2022Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Takaaki Murata, Yuji Okita, Michiko Hashimoto, Kie Kubo, Hiroshi Mochikawa
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Publication number: 20210147233Abstract: An ozone generation device includes an inverter, an ozone generator, and a reactor. The inverter turns on and off a switching element by pulse width modulation (PWM) control to convert DC power into AC power. In the ozone generator, voltage of the AC power is applied to a dielectric electrode, and discharge is generated in raw material gas flowing in a discharge gap between the dielectric electrode and a metal electrode, so that ozone is generated by the discharge. The reactor is connected in series to a dielectric electrode, and reduces an inrush current that flows through the dielectric electrode when the switching element is switched from off to on by the PWM control by the inverter.Type: ApplicationFiled: September 19, 2017Publication date: May 20, 2021Applicants: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Takaaki MURATA, Yuji OKITA, Michiko HASHIMOTO, Kie KUBO, Hiroshi MOCHIKAWA
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Publication number: 20210039948Abstract: An ozone generator includes a metal electrode, a dielectric element, a conductive film, and a power feeding member. The dielectric element has a tubular shape and is spaced from the metal electrode with a discharge gap to which raw gas is supplied. The conductive film is located. on an inner surface of the dielectric element. The power feeding member is electrically connected to the conductive film, and includes a contact member of a mesh form including a plurality of woven metal wires. The contact member contacts with the conductive film.Type: ApplicationFiled: September 13, 2018Publication date: February 11, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Michiko HASHIMOTO, Takaaki MURATA, Kie KUBO, Yuji OKITA
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Publication number: 20190367362Abstract: An ozone generator includes a first end plate, a second end plate located opposite the first end plate, a metallic electrode held at both ends by the first and second end plates, a dielectric located inside the metallic electrode with a discharge gap, and including an open end on a first end plate side and a closed end on a second end plate side, a conductive film located on an inner surface of the dielectric, and a high voltage feeding terminal electrically coupled to the conductive film. The conductive film and the high voltage feeding terminal are at least partially in a same position as the first end plate in axial direction of the dielectric. An end of the conductive film and an end of the high voltage feeding terminal on a dielectric opening side extend further toward the opening of the dielectric than the first end plate in the axial direction.Type: ApplicationFiled: September 19, 2017Publication date: December 5, 2019Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATIONInventors: Michiko HASHIMOTO, Takaaki MURATA, Kie KUBO, Yuji OKITA
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Patent number: 9656866Abstract: According to one embodiment, an ozone generation device includes a first electrode unit, a second electrode unit, a fuse and a fuse holder. The first electrode unit is provided on an inner face of a discharge tube. The second electrode unit is provided outside the discharge tube at an interval. The second electrode faces the first electrode unit. A diameter of the outer face of the fuse is smaller than a diameter of the inner face. At least a part of the outer face is positioned inside the discharge tube. The fuse holder is interposed between the discharge tube and the fuse, includes the outer periphery and an inner periphery and is provided with a first opening and a second opening. The outer periphery extends in an arc along the inner face to come into contact with the inner face. The inner periphery extends in an arc along the outer face to come into contact with the outer face.Type: GrantFiled: March 11, 2014Date of Patent: May 23, 2017Assignee: Kabushiki Kaisha ToshibaInventors: Akihiko Shirota, Kazuhiko Noda, Michiko Hashimoto, Kie Kubo
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Publication number: 20160207768Abstract: According to one embodiment, an ozone generation device includes a first electrode unit, a second electrode unit, a fuse and a fuse holder. The first electrode unit is provided on an inner face of a discharge tube. The second electrode unit is provided outside the discharge tube at an interval. The second electrode faces the first electrode unit. A diameter of the outer face of the fuse is smaller than a diameter of the inner face. At least a part of the outer face is positioned inside the discharge tube. The fuse holder is interposed between the discharge tube and the fuse, includes the outer periphery and an inner periphery and is provided with a first opening and a second opening. The outer periphery extends in an arc along the inner face to come into contact with the inner face. The inner periphery extends in an arc along the outer face to come into contact with the outer face.Type: ApplicationFiled: March 11, 2014Publication date: July 21, 2016Inventors: Akihiko SHIROTA, Kazuhiko NODA, Michiko HASHIMOTO, Kie KUBO
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Patent number: 8663569Abstract: An ozone generating apparatus according to one embodiment includes a hollow cylindrical sealed container provided with an inlet for a feed gas containing oxygen gas and an outlet for an ozonized gas. A discharge tube including a dielectric tube arranged within the container and a first electrode arranged within the dielectric tube is provided in the container. A second electrode is arranged within the container and surrounds the first electrode, spaced apart from the dielectric tube to form a discharge gap between the second electrode and the dielectric tube. The apparatus further includes a discharge voltage source configured to apply a discharging voltage across the first and second electrodes, and a cooling water jacket surrounding the second electrode. The dielectric tube has an outer diameter of 12 mm or more, but 19 mm or less.Type: GrantFiled: December 20, 2011Date of Patent: March 4, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Takaaki Murata, Kiyoyuki Amemori, Ryutaro Makise, Kanako Nakajima, Kazuhiko Noda, Michiko Hashimoto
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Publication number: 20120156106Abstract: An ozone generating apparatus according to one embodiment includes a hollow cylindrical sealed container provided with an inlet for a feed gas containing oxygen gas and an outlet for an ozonized gas. A discharge tube including a dielectric tube arranged within the container and a first electrode arranged within the dielectric tube is provided in the container. A second electrode is arranged within the container and surrounds the first electrode, spaced apart from the dielectric tube to form a discharge gap between the second electrode and the dielectric tube. The apparatus further includes a discharge voltage source configured to apply a discharging voltage across the first and second electrodes, and a cooling water jacket surrounding the second electrode. The dielectric tube has an outer diameter of 12 mm or more, but 19 mm or less.Type: ApplicationFiled: December 20, 2011Publication date: June 21, 2012Inventors: Takaaki MURATA, Kiyoyuki Amemori, Ryutaro Makise, Kanako Nakajima, Kazuhiko Noda, Michiko Hashimoto