Patents by Inventor Amane Majima
Amane Majima 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: 11798762Abstract: A gas circuit breaker includes a sealed container in which the arc-extinguishing gas is enclosed, a first fixed contactor portion and a second fixed contactor portion fixed to the sealed container, and a movable contactor portion which moves between the first fixed contactor portion and the second fixed contactor portion, to conduct and break current between them, in which an arc generated at a time of current breaking action is extinguished by spraying the arc-extinguishing gas, the gas circuit breaker includes a gas chamber configured to accumulate the unnecessary gas, the sealed container is formed by joining ends of the two hollow truncated cone portions, each having a large opening diameter, with the cylindrical portion therebetween, and the gas chamber is formed inside the cylindrical portion forming the sealed container.Type: GrantFiled: April 2, 2019Date of Patent: October 24, 2023Assignees: Kabushiki Kaisha Toshiba, Toshiba Energy Systems & Solutions CorporationInventors: Takanori Iijima, Amane Majima, Toshiyuki Uchii, Akira Shimamura, Norimitsu Kato
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Publication number: 20220319785Abstract: There is a gas circuit breaker that can reduce deterioration in insulation performance and current breaking performance due to unnecessary gas generated from arc-extinguishing gas sprayed to an arc.Type: ApplicationFiled: April 2, 2019Publication date: October 6, 2022Applicants: Kabushiki Kaisha Toshiba, Toshiba Energy Systems & Solutions CorporationInventors: Takanori IIJIMA, Amane MAJIMA, Toshiyuki UCHII, Akira SHIMAMURA, Norimitsu KATO
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Publication number: 20220166198Abstract: A gas insulation apparatus has a sealed container, an insulation gas, a high-voltage portion, and a removal material. The insulation gas has CO2 and O2 filling the sealed container as main components. The high-voltage portion is stored in the sealed container. The removal material reduces concentrations of HF, CO, and O3 in the insulation gas.Type: ApplicationFiled: February 8, 2022Publication date: May 26, 2022Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Tomohiro HASEGAWA, Tooru INOUE, Norimitsu KATO, Amane MAJIMA, Toshiyuki UCHII
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Patent number: 11222760Abstract: A gas circuit breaker of an embodiment includes a sealed container, a first contact part and a second contact part, an operation mechanism, an insulating nozzle, a pressure accumulator, and an electric field shield. The insulating nozzle is displaced in conjunction with the first contact part in a separation process of the first contact part and the second contact part. The insulating nozzle surrounds arc discharge generated between the first contact part and the second contact part. The electric field shield is attached to the insulating nozzle. The electric field shield has a floating potential during a period of at least part of the separation process. The electric field shield is electrically connected to the second contact part such that the electric field shield has the same potential in a completely open electrode state in which separation between the first contact part and the second contact part is terminated.Type: GrantFiled: July 29, 2020Date of Patent: January 11, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Amane Majima, Tooru Inoue, Toshiyuki Uchii, Norimitsu Kato, Akira Shimamura, Takanori Yasuoka, Tsutomu Tanaka, Tadashi Mori
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Patent number: 11177097Abstract: A gas circuit breaker to reduce deterioration of insulation and current-breaking performance thereof includes a sealed container (8) filled with arc-extinguishing gas. A first fixed contactor portion (2) and a second fixed contactor portion (4) are fixed to the sealed container (8). A movable contactor portion (3) moves between the first fixed contactor portion (2) and the second fixed contactor portion (4) and conducts and breaks current between the first fixed contactor portion (2) and the second fixed contactor portion (4). An arc is generated between a fixed arc contactor (21) provided to the first fixed contactor portion (2) and a movable arc contactor (31) provided to the movable contactor portion (3) when current breaking action is extinguished by an arc-extinguishing gas being sprayed thereto. Unnecessary gas generated from the arc-extinguishing gas sprayed to the arc is accumulated in a gas chamber (5).Type: GrantFiled: December 1, 2017Date of Patent: November 16, 2021Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takanori Iijima, Toshiyuki Uchii, Amane Majima, Norimitsu Kato, Akira Shimamura
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Publication number: 20210175030Abstract: A gas circuit breaker that can reduce deterioration of insulation performance thereof and current breaking performance thereof by the unnecessary gas generated from the arc-extinguishing gas sprayed to the arc is provided.Type: ApplicationFiled: December 1, 2017Publication date: June 10, 2021Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Takanori IIJIMA, Toshiyuki UCHII, Amane MAJIMA, Norimitsu KATO, Akira SHIMAMURA
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Publication number: 20200357586Abstract: A gas circuit breaker of an embodiment includes a sealed container, a first contact part and a second contact part, an operation mechanism, an insulating nozzle, a pressure accumulator, and an electric field shield. The insulating nozzle is displaced in conjunction with the first contact part in a separation process of the first contact part and the second contact part. The insulating nozzle surrounds arc discharge generated between the first contact part and the second contact part. The electric field shield is attached to the insulating nozzle. The electric field shield has a floating potential during a period of at least part of the separation process. The electric field shield is electrically connected to the second contact part such that the electric field shield has the same potential in a completely open electrode state in which separation between the first contact part and the second contact part is terminated.Type: ApplicationFiled: July 29, 2020Publication date: November 12, 2020Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Amane MAJIMA, Tooru INOUE, Toshiyuki UCHII, Norimitsu KATO, Akira SHIMAMURA, Takanori YASUOKA, Tsutomu TANAKA, Tadashi MORI
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Patent number: 10475607Abstract: In a gas circuit breaker, arc-extinguishing gas is filled in a container. A movable portion housed in the container includes a movable arc contact. The movable portion includes a pressure accumulator that increases pressure of an arc-extinguishing gas. An opposing portion housed in the container includes an opposing arc contact, an exhaust pipe, and a shielding portion. The shielding portion includes a first shielding wall intersecting with an axial direction of the pipe and a second shielding wall having a cylindrical shape extending from the first shielding wall toward the movable portion along the axial direction of the pipe. The second shielding wall includes through-holes. Lengths of the respective through-holes along the axial direction are from 18 millimeter's to 55 millimeters inclusive. An arc-extinguishing gas whose pressure has been increased in the pressure accumulator flows into a space to extinguish arc discharge, and flows into the second shielding wall.Type: GrantFiled: February 12, 2018Date of Patent: November 12, 2019Assignee: Kabushiki Kaisha ToshibaInventors: Tomohiko Jimbo, Biswas Debasish, Amane Majima
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Publication number: 20190088430Abstract: In a gas circuit breaker, arc-extinguishing gas is filled in a container. A movable portion housed in the container includes a movable arc contact. The movable portion includes a pressure accumulator that increases pressure of an arc-extinguishing gas. An opposing portion housed in the container includes an opposing arc contact, an exhaust pipe, and a shielding portion. The shielding portion includes a first shielding wall intersecting with an axial direction of the pipe and a second shielding wall having a cylindrical shape extending from the first shielding wall toward the movable portion along the axial direction of the pipe. The second shielding wall includes through-holes. Lengths of the respective through-holes along the axial direction are from 18 millimeter's to 55 millimeters inclusive. An arc-extinguishing gas whose pressure has been increased in the pressure accumulator flows into a space to extinguish arc discharge, and flows into the second shielding wall.Type: ApplicationFiled: February 12, 2018Publication date: March 21, 2019Applicant: Kabushiki Kaisha ToshibaInventors: Tomohiko JIMBO, Biswas DEBASISH, Amane MAJIMA
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Patent number: 9644632Abstract: A voltage application device of an embodiment applies a voltage between a first and second electrode disposed separately from each other in an airflow generation device, which is disposed on a rotation blade of a rotation apparatus, in which a rotation shaft of the rotation blade is held rotatably by a holding part. In the voltage application device of the embodiment, a voltage output unit outputs a voltage. Then, a sliding type transmission unit having electrodes disposed respectively on the rotation blade side and the holding part side of the rotation shaft transmits a voltage outputted from the voltage output unit from the holding part side to the rotation blade side. Then, a transformation unit disposed on the rotation blade side increases the voltage transmitted by the sliding type transmission unit and outputs the voltage to the airflow generation device.Type: GrantFiled: October 1, 2014Date of Patent: May 9, 2017Assignee: Kabushiki Kaisha ToshibaInventors: Motofumi Tanaka, Hisashi Matsuda, Shohei Goshima, Hiroyuki Yasui, Amane Majima, Toshiki Osako
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Patent number: 9258917Abstract: According to an embodiment, a gas insulated electrical equipment includes: a high-voltage conductor to be electrically charged; a hermetically sealed tank to be filled with insulating gas, one or more insulating spacers for dividing the hermetically sealed tank into gas compartments and supporting the high-voltage conductor; and a pressure release device equipped with a mouth of flow channel adapted to allow the inside and the outside of the hermetically sealed tank to communicate with each other so as to release the pressure in the hermetically sealed tank, which maintains the hermetically sealed state in an ordinary condition where the pressure in a gas compartment does not exceed the working pressure but releases the pressure in the hermetically sealed tank in an abnormal condition where the pressure in the gas compartment exceeds the working pressure.Type: GrantFiled: May 13, 2014Date of Patent: February 9, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki Uchii, Akira Shimamura, Amane Majima
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Publication number: 20150110651Abstract: A voltage application device of an embodiment applies a voltage between a first and second electrode disposed separately from each other in an airflow generation device, which is disposed on a rotation blade of a rotation apparatus, in which a rotation shaft of the rotation blade is held rotatably by a holding part. In the voltage application device of the embodiment, a voltage output unit outputs a voltage. Then, a sliding type transmission unit having electrodes disposed respectively on the, rotation blade side and the holding part side of the rotation shaft transmits a voltage outputted from the voltage output unit from the holding part side to the rotation blade side. Then, a transformation unit disposed on the rotation blade side increases the voltage transmitted by the sliding type transmission unit and outputs the voltage to the airflow generation device.Type: ApplicationFiled: October 1, 2014Publication date: April 23, 2015Inventors: Motofumi Tanaka, Hisashi Matsuda, Shohei Goshima, Hiroyuki Yasui, Amane Majima, Toshiki Osaka
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Patent number: 8937799Abstract: A voltage application device of an embodiment applies a voltage between a first and second electrode disposed separately from each other in an airflow generation device, which is disposed on a rotation blade of a rotation apparatus, in which a rotation shaft of the rotation blade is held rotatably by a holding part. In the voltage application device of the embodiment, a voltage output unit outputs a voltage. Then, a sliding type transmission unit having electrodes disposed respectively on the rotation blade side and the holding part side of the rotation shaft transmits a voltage outputted from the voltage output unit from the holding part side to the rotation blade side. Then, a transformation unit disposed on the rotation blade side increases the voltage transmitted by the sliding type transmission unit and outputs the voltage to the airflow generation device.Type: GrantFiled: March 15, 2012Date of Patent: January 20, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Motofumi Tanaka, Hisashi Matsuda, Shohei Goshima, Hiroyuki Yasui, Amane Majima, Toshiki Osako
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Publication number: 20140263187Abstract: A gas-insulated device for electrical power is disclosed that includes: a fixed contact unit and a movable contact unit which are disposed to face with each other in an airtight container filled with a carbon dioxide gas or a gas mixture including a carbon dioxide gas, serving as an arc extinguishing gas. The fixed contact unit includes a fixed arc contact, a fixed conduction contact disposed outside the fixed arc contact, and a conductive supporting member for electrically connecting between the fixed arc contact and the fixed conduction contact and supporting these contacts.Type: ApplicationFiled: February 11, 2014Publication date: September 18, 2014Applicant: Kabushiki Kaisha ToshibaInventors: Akira Yamada, Hisao Oomura, Hirofumi Okabe, Kei Kawasaki, Amane Majima
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Publication number: 20140247538Abstract: According to an embodiment, a gas insulated electrical equipment includes: a high-voltage conductor to be electrically charged; a hermetically sealed tank to be filled with insulating gas, one or more insulating spacers for dividing the hermetically sealed tank into gas compartments and supporting the high-voltage conductor; and a pressure release device equipped with a mouth of flow channel adapted to allow the inside and the outside of the hermetically sealed tank to communicate with each other so as to release the pressure in the hermetically sealed tank, which maintains the hermetically sealed state in an ordinary condition where the pressure in a gas compartment does not exceed the working pressure but releases the pressure in the hermetically sealed tank in an abnormal condition where the pressure in the gas compartment exceeds the working pressure.Type: ApplicationFiled: May 13, 2014Publication date: September 4, 2014Inventors: Toshiyuki UCHII, Akira SHIMAMURA, Amane MAJIMA
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Patent number: 8674253Abstract: According to an embodiment, a gas insulation apparatus (e.g., a gas circuit breaker) includes a high-voltage unit, a zeolite and an insulation gas in a closed vessel. The insulation gas is CO2 gas or a gas including CO2 gas as the main component. The zeolite is contained in a zeolite case and is placed under an insulation gas atmosphere. CO2 is adsorbed on the zeolite before use of the gas insulation apparatus.Type: GrantFiled: December 14, 2011Date of Patent: March 18, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Toshiyuki Uchii, Amane Majima, Toshiyuki Nakano, Yoshihiko Hirano, Akira Shimamura, Yoshikazu Hoshina
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Publication number: 20120287550Abstract: A voltage application device of an embodiment applies a voltage between a first and second electrode disposed separately from each other in an airflow generation device, which is disposed on a rotation blade of a rotation apparatus, in which a rotation shaft of the rotation blade is held rotatably by a holding part. In the voltage application device of the embodiment, a voltage output unit outputs a voltage. Then, a sliding type transmission unit having electrodes disposed respectively on the rotation blade side and the holding part side of the rotation shaft transmits a voltage outputted from the voltage output unit from the holding part side to the rotation blade side. Then, a transformation unit disposed on the rotation blade side increases the voltage transmitted by the sliding type transmission unit and outputs the voltage to the airflow generation device.Type: ApplicationFiled: March 15, 2012Publication date: November 15, 2012Inventors: Motofumi TANAKA, Hisashi Matsuda, Shohei Goshima, Hiroyuki Yasui, Amane Majima, Toshiki Osako
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Publication number: 20120085735Abstract: According to an embodiment, a gas insulation apparatus (e.g., a gas circuit breaker) includes a high-voltage unit, a zeolite and an insulation gas in a closed vessel. The insulation gas is CO2 gas or a gas including CO2 gas as the main component. The zeolite is contained in a zeolite case and is placed under an insulation gas atmosphere. CO2 is adsorbed on the zeolite before use of the gas insulation apparatus.Type: ApplicationFiled: December 14, 2011Publication date: April 12, 2012Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toshiyuki UCHII, Amane Majima, Toshiyuki Nakano, Yoshihiko Hirano, Akira Shimamura, Yoshikazu Hoshina