Patents by Inventor Katsuki HOTTA
Katsuki HOTTA 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: 11962142Abstract: The present disclosure includes: a power generator; and a power line through which power generated by the power generator is transmitted to a load. The power line between the power generator and the load is provided with: a current limitation device configured to, when detecting occurrence of a fault current, limit the fault current; and a current interruption device configured to interrupt current heading for the load, in conjunction with the limitation of the fault current performed by the current limitation device.Type: GrantFiled: April 16, 2020Date of Patent: April 16, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuhiko Horinouchi, Katsuki Hotta, Tsuguhiro Takuno
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Patent number: 11908648Abstract: A switch includes: a first stationary contact having a first stationary contact point; a second stationary contact having a second stationary contact point; a movable contact having a first movable contact, and a second movable contact point; a first magnet pair defined by magnets having surfaces facing each other, the magnets of the first magnet pair being disposed with the first stationary contact point and the first movable contact point therebetween in such a manner that the magnets of the first magnet pair become farther from each other outwardly; and a second magnet pair defined by magnets having surfaces facing each other, the magnets of the second magnet pair being disposed with the second stationary contact point and the second movable contact point therebetween in such a manner that the magnets of the second magnet pair become farther from each other outwardly.Type: GrantFiled: December 2, 2020Date of Patent: February 20, 2024Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuki Hotta, Shinya Watanabe, Takashi Inaguchi, Katsutoshi Ikarashi
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Patent number: 11658467Abstract: Provided is a busbar connecting device that can achieve good workability and high reliability at the same time. The busbar connecting device includes: a connection portion in which a busbar conductor and a current conductor of a bushing are connected; an insulation busbar connector covering the connection portion; a work hole communicating with the connection portion from an outside of the insulation busbar connector; and an insulating plug inserted into the work hole and sealing the insulation busbar connector, wherein a surface pressure between an inner circumferential surface of the work hole and an outer circumferential surface of the insulating plug is greater at a deep part of the work hole than at a shallow part of the work hole.Type: GrantFiled: December 26, 2018Date of Patent: May 23, 2023Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Shintaro Yamada, Katsushi Nakada, Katsuki Hotta, Yasutomo Otake, Takao Tsurimoto, Shintaro Kuroaki
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Publication number: 20230030964Abstract: The present disclosure includes: a power generator; and a power line through which power generated by the power generator is transmitted to a load. The power line between the power generator and the load is provided with: a current limitation device configured to, when detecting occurrence of a fault current, limit the fault current; and a current interruption device configured to interrupt current heading for the load, in conjunction with the limitation of the fault current performed by the current limitation device.Type: ApplicationFiled: April 16, 2020Publication date: February 2, 2023Applicant: Mitsubishi Electric CorporationInventors: Katsuhiko HORINOUCHI, Katsuki HOTTA, Tsuguhiro TAKUNO
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Publication number: 20220415596Abstract: A switch includes: a first stationary contact having a first stationary contact point; a second stationary contact having a second stationary contact point; a movable contact having a first movable contact, and a second movable contact point; a first magnet pair defined by magnets having surfaces facing each other, the magnets of the first magnet pair being disposed with the first stationary contact point and the first movable contact point therebetween in such a manner that the magnets of the first magnet pair become farther from each other outwardly; and a second magnet pair defined by magnets having surfaces facing each other, the magnets of the second magnet pair being disposed with the second stationary contact point and the second movable contact point therebetween in such a manner that the magnets of the second magnet pair become farther from each other outwardly.Type: ApplicationFiled: December 2, 2020Publication date: December 29, 2022Applicant: Mitsubishi Electric CorporationInventors: Katsuki HOTTA, Shinya WATANABE, Takashi INAGUCHI, Katsutoshi IKARASHI
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Publication number: 20220415597Abstract: A switch includes a first fixed contactor, a second fixed contactor, a movable contactor, permanent magnets, and a yoke. The movable contactor extends in a first direction, includes a first movable contact at a first end portion, and is provided to be contactable with and separatable from the first fixed contactor in a second direction. The permanent magnets are arranged to sandwich the movable contactor, and to cause their surfaces facing the movable contactor in the third direction of the movable contactor to have the same polarity. The yoke surrounds a periphery of the movable contactor in the first direction and the third direction and is connected to surfaces of the permanent magnets on opposite sides of their surfaces facing the movable contactor. The yoke includes a protrusion protruding toward the movable contactor at a position facing the first end portion of the movable contactor in the first direction.Type: ApplicationFiled: December 2, 2020Publication date: December 29, 2022Applicant: Mitsubishi Electric CorporationInventors: Katsuki HOTTA, Shinya WATANABE, Takashi INAGUCHI, Katsutoshi IKARASHI
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Patent number: 11348753Abstract: A contactor includes a fixed iron core, a movable iron core, an operation coil, a first crossbar, a tripping spring, and a second crossbar. The contactor includes a push spring to push a movable contact toward a fixed contact, a trip coil connected to the fixed contact, and a plunger that is operated by an electromagnetic force generated in the trip coil when a current of a predetermined value or higher flows through the trip coil. The contactor includes an opening lever to push the second crossbar in a direction away from the first crossbar in conjunction with the operation of the plunger.Type: GrantFiled: December 1, 2017Date of Patent: May 31, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi Inaguchi, Kazuki Takahashi, Katsuki Hotta, Hiroyuki Nozaki
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Publication number: 20220006270Abstract: Provided is a busbar connecting device that can achieve good workability and high reliability at the same time. The busbar connecting device includes: a connection portion in which a busbar conductor and a current conductor of a bushing are connected; an insulation busbar connector covering the connection portion; a work hole communicating with the connection portion from an outside of the insulation busbar connector; and an insulating plug inserted into the work hole and sealing the insulation busbar connector, wherein a surface pressure between an inner circumferential surface of the work hole and an outer circumferential surface of the insulating plug is greater at a deep part of the work hole than at a shallow part of the work hole.Type: ApplicationFiled: December 26, 2018Publication date: January 6, 2022Applicant: Mitsubishi Electric CorporationInventors: Shintaro YAMADA, Katsushi NAKADA, Katsuki HOTTA, Yasutomo OTAKE, Takao TSURIMOTO, Shintaro KUROAKI
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Patent number: 11205546Abstract: A switch includes a first fixed contact, a second fixed contact, a movable contact, a drive shaft, a first outside yoke, a second outside yoke, a first inside yoke, a second inside yoke, and a permanent magnet. The permanent magnet magnetically couples the first outside yoke, the second outside yoke, the first inside yoke, and the second inside yoke, and produces a magnetic field component in a direction in which the first fixed contact point and the second fixed contact point are aligned, between the first fixed contact point and the first movable contact point and between the second fixed contact point and the second movable contact point.Type: GrantFiled: June 15, 2018Date of Patent: December 21, 2021Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuki Hotta, Takashi Inaguchi, Kazuki Takahashi
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Publication number: 20200219691Abstract: A contactor includes a fixed iron core, a movable iron core, an operation coil, a first crossbar, a tripping spring, and a second crossbar. The contactor includes a push spring to push a movable contact toward a fixed contact, a trip coil connected to the fixed contact, and a plunger that is operated by an electromagnetic force generated in the trip coil when a current of a predetermined value or higher flows through the trip coil. The contactor includes an opening lever to push the second crossbar in a direction away from the first crossbar in conjunction with the operation of the plunger.Type: ApplicationFiled: December 1, 2017Publication date: July 9, 2020Applicant: Mitsubishi Electric CorporationInventors: Takashi INAGUCHI, Kazuki TAKAHASHI, Katsuki HOTTA, Hiroyuki NOZAKI
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Publication number: 20200203094Abstract: A switch includes a first fixed contact, a second fixed contact, a movable contact, a drive shaft, a first outside yoke, a second outside yoke, a first inside yoke, a second inside yoke, and a permanent magnet. The permanent magnet magnetically couples the first outside yoke, the second outside yoke, the first inside yoke, and the second inside yoke, and produces a magnetic field component in a direction in which the first fixed contact point and the second fixed contact point are aligned, between the first fixed contact point and the first movable contact point and between the second fixed contact point and the second movable contact point.Type: ApplicationFiled: June 15, 2018Publication date: June 25, 2020Applicant: Mitsubishi Electric CorporationInventors: Katsuki HOTTA, Takashi INAGUCHI, Kazuki TAKAHASHI
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Patent number: 9905385Abstract: According to an electromagnetic switch of the present invention, a crossbar operating in conjunction with a movable core slides in response to magnetization or demagnetization of an operating coil to cause attraction or separation between a fixed contact point and a movable contact point on the supply-side and between a fixed contact point and a movable contact point on the load-side. The electromagnetic switch further includes a first crossbar sliding part and a second crossbar sliding part, as well as a first casing sliding part and a second casing sliding part that allow the first and second crossbar sliding parts to slide. A contact between the first casing sliding part and the first crossbar sliding part or between the second casing sliding part and the second crossbar sliding part causes the crossbar on the side of the movable core to be tilted in a direction opposite to the direction of gravity with respect to the horizontal.Type: GrantFiled: December 24, 2014Date of Patent: February 27, 2018Assignee: Mitsubishi Electric CorporationInventors: Takashi Inaguchi, Sachiyo Kato, Katsuki Hotta, Tetsuya Yagi
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Publication number: 20170358414Abstract: According to an electromagnetic switch of the present invention, a crossbar operating in conjunction with a movable core slides in response to magnetization or demagnetization of an operating coil to cause attraction or separation between a fixed contact point and a movable contact point on the supply-side and between a fixed contact point and a movable contact point on the load-side. The electromagnetic switch further includes a first crossbar sliding part and a second crossbar sliding part, as well as a first casing sliding part and a second casing sliding part that allow the first and second crossbar sliding parts to slide. A contact between the first casing sliding part and the first crossbar sliding part or between the second casing sliding part and the second crossbar sliding part causes the crossbar on the side of the movable core to be tilted in a direction opposite to the direction of gravity with respect to the horizontal.Type: ApplicationFiled: December 24, 2014Publication date: December 14, 2017Applicant: Mitsubishi Electric CorporationInventors: Takashi INAGUCHI, Sachiyo KATO, Katsuki HOTTA, Tetsuya YAGI