Patents by Inventor Shuichi Kikukawa
Shuichi Kikukawa 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: 8791379Abstract: It is an object to provide a switchgear capable of alleviating burden to a manager. In order to solve the aforementioned problem, the switchgear according to the present invention includes a plurality of compatible switch units each provided in a housing and closing/interrupting/ground functions so that the plurality of switch units are connected to supply power to the load side.Type: GrantFiled: December 6, 2011Date of Patent: July 29, 2014Assignee: Hitachi, Ltd.Inventors: Shuichi Kikukawa, Kenji Tsuchiya, Ayumu Morita, Keiichi Takahashi
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Patent number: 8411418Abstract: The vacuum insulated switchgear includes: a housing enclosing a control compartment, a switch compartment, and a busbar compartment, each of the three compartments being partitioned by a metallic earthing plate; a first busbar and second busbar extended from an adjacent panel, in the busbar compartment; and a first busbar-connecting bushing and second busbar-connecting bushing making the first and second busbars connectible/disconnectible; a double-breaking three position vacuum switch, two sets of earthing switches, the first busbar-connecting bushing, and the second busbar-connecting bushing being integrally molded to form a switch provided on an electrical phase-by phase basis independently, wherein the switches for three phases are arranged in order side by side in the housing.Type: GrantFiled: August 10, 2010Date of Patent: April 2, 2013Assignee: Hitachi, Ltd.Inventors: Shuichi Kikukawa, Kenji Tsuchiya, Yuuko Kajiyama, Daisuke Sugai
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Patent number: 8379373Abstract: A vacuum insulated switchgear is arranged as a panel for a power substation with the other or the others in parallel rows. the vacuum insulated switchgear comprises a housing with a switch section, a bus section, a cable section, and a control section which are partitioned by earthed metal plates respectively. The vacuum insulated switchgear comprises: a connection member provided in each bus connecting part in the bus section of the each panel and enabling each bus to be connected and disconnected; and a bus recovery member which is detachably connected between the connection members of faultless panels adjacent to a faulty panel when the faulty panel occurred.Type: GrantFiled: January 29, 2010Date of Patent: February 19, 2013Assignee: Hitachi, Ltd.Inventors: Shuichi Kikukawa, Kenji Tsuchiya, Masato Kobayashi
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Patent number: 8304678Abstract: The vacuum insulated switch-gear is configured to be capable of being lifted up with a jack-up bolt to adjust a seated height of the vacuum insulated switch-gear. The switch-gear comprises a nut fixed on a base plate forming a bottom of the vacuum insulated switch-gear. The nut is used as a mating component with the jack-up bolt.Type: GrantFiled: July 28, 2009Date of Patent: November 6, 2012Assignee: Hitachi, Ltd.Inventors: Shuichi Kikukawa, Kenji Tsuchiya, Yuko Kajiyama, Daisuke Sugai
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Patent number: 8294057Abstract: An object of the invention is to provide a vacuum switch which can achieve a reduction of an electric loss and an improvement of a heat transmission performance by preventing an air gap portion from being generated between an electrode and a conductor rod and preventing the electrode and the conductor rod from generating any positional displacement. An electrode for a switch in accordance with the invention is provided with the conductor rod, a contact point electrode inserted to the conductor rod, and a coupling plate fixing both the elements to an outer side in a diametrical direction of the conductor rod and the contact point electrode, thereby fixing both the elements.Type: GrantFiled: August 16, 2010Date of Patent: October 23, 2012Assignee: Hitachi, Ltd.Inventors: Miki Yamazaki, Kenji Tsuchiya, Ayumu Morita, Masato Kobayashi, Shuichi Kikukawa, Shigeru Kikuchi
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Patent number: 8247725Abstract: A vacuum switchgear has a vacuum valve including a movable conductor connected to an insulating rod, and a fixed conductor connected to a bus bar or to a load cable, a vacuum chamber encasing the vacuum valve, an insulating envelope covering the vacuum chamber, the outer surface thereof being covered with an electro-conductive layer thereby to earth the envelope, and an insulating lid gas-tightly fitted to the insulating envelope. The lid has an insulating bushing through which an insulating rod penetrates, the insulating rod being connected to an operating mechanism, wherein the insulating rod except a portion exposed from the bushing is gas-tightly confined in insulating gas atmosphere formed between the insulating envelope and the insulating lid.Type: GrantFiled: November 12, 2009Date of Patent: August 21, 2012Assignee: Hitachi, Ltd.Inventors: Ayumu Morita, Takashi Sato, Tomoaki Utsumi, Makoto Yano, Kenji Tsuchiya, Masato Kobayashi, Shuichi Kikukawa, Junichi Katagiri
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Publication number: 20120152716Abstract: It is an object to provide a switchgear capable of alleviating burden to a manager. In order to solve the aforementioned problem, the switchgear according to the present invention includes a plurality of compatible switch units each provided in a housing and closing/interrupting/ground functions so that the plurality of switch units are connected to supply power to the load side.Type: ApplicationFiled: December 6, 2011Publication date: June 21, 2012Inventors: Shuichi KIKUKAWA, Kenji TSUCHIYA, Ayumu MORITA, Keiichi TAKAHASHI
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Publication number: 20110073567Abstract: An object of the invention is to provide a vacuum switch which can achieve a reduction of an electric loss and an improvement of a heat transmission performance by preventing an air gap portion from being generated between an electrode and a conductor rod and preventing the electrode and the conductor rod from generating any positional displacement. An electrode for a switch in accordance with the invention is provided with the conductor rod, a contact point electrode inserted to the conductor rod, and a coupling plate fixing both the elements to an outer side in a diametrical direction of the conductor rod and the contact point electrode, thereby fixing both the elements.Type: ApplicationFiled: August 16, 2010Publication date: March 31, 2011Applicant: Hitachi, Ltd.Inventors: Miki YAMAZAKI, Kenji Tsuchiya, Ayumu Morita, Masato Kobayashi, Shuichi Kikukawa, Shigeru Kikuchi
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Publication number: 20110058311Abstract: The vacuum insulated switchgear includes a housing enclosing a control compartment, a switch compartment, and a busbar compartment, each of the three compartments being partitioned by a metallic earthing plate; a first busbar and second busbar extended from an adjacent panel, in the busbar compartment; and a first busbar-connecting bushing and second busbar-connecting bushing making the first and second busbars connectible/disconnectible; a double-breaking three position vacuum switch, two sets of earthing switches, the first busbar-connecting bushing, and the second busbar-connecting bushing being integrally molded to form a switch provided on an electrical phase-by phase basis independently, wherein the switches for three phases are arranged in order side by side in the housing.Type: ApplicationFiled: August 10, 2010Publication date: March 10, 2011Applicant: HITACHI, LTD.Inventors: Shuichi KIKUKAWA, Kenji TSUCHIYA, Yuuko KAJIYAMA, Daisuke SUGAI
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Patent number: 7897890Abstract: A vacuum insulated switchgear is provided with: an enclosure having a switch block defined by a grounded metal plate, a bus block positioned above the switch block, and a cable block positioned on the rear side of the bus block; a bus provided in the bus block and connected with a fixed contact of a vacuum double-break three-position switch; the vacuum double-break three-position switch provided in the switch block so that its movable contacts are positioned below its fixed contacts; an operating device provided in the switch block so as to be positioned below the vacuum double-break three-position switch; and a lever mechanism that couples together the movable contacts of the vacuum double-break three-position switch and the operating device.Type: GrantFiled: August 20, 2007Date of Patent: March 1, 2011Assignee: Hitachi, Ltd.Inventors: Shuichi Kikukawa, Kenji Tsuchiya, Yuko Kajiyama
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Patent number: 7813109Abstract: Switchgear having a vacuum-insulated switchgear 2 comprising switches having at least breaking and disconnecting functions, each placed in a unit, and solid-insulated bus bars 12 for electrically connecting the switches in each unit; an air-insulated switchgear 1 comprising switches having at least breaking and disconnecting functions, each placed in a unit, and air-insulated bus bars for electrically connecting the switches in each unit; and_the vacuum-insulated switchgear 2 and the air-insulated switchgear 1 are installed side-by-side, wherein the vacuum-insulated switchgear 2 and the air-insulated switchgear 1 are electrically connected through flexible conductors 17 which are provided between the solid-insulated bus bars 12 and the air-insulated bus bars.Type: GrantFiled: February 6, 2009Date of Patent: October 12, 2010Assignee: Hitachi, Ltd.Inventors: Shuichi Kikukawa, Kenji Tsuchiya, Yuko Kajiyama
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Publication number: 20100195273Abstract: A vacuum insulated switchgear is arranged as a panel for a power substation with the other or the others in parallel rows. the vacuum insulated switchgear comprises a housing with a switch section, a bus section, a cable section, and a control section which are partitioned by earthed metal plates respectively. The vacuum insulated switchgear comprises: a connection member provided in each bus connecting part in the bus section of the each panel and enabling each bus to be connected and disconnected; and a bus recovery member which is detachably connected between the connection members of faultless panels adjacent to a faulty panel when the faulty panel occurred.Type: ApplicationFiled: January 29, 2010Publication date: August 5, 2010Applicant: HITACHI, LTD.Inventors: Shuichi KIKUKAWA, Kenji TSUCHIYA, Masato KOBAYASHI
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Publication number: 20100122967Abstract: A vacuum switchgear comprising: a vacuum valve comprising a movable conductor connected to an insulating rod, and a fixed conductor connected to a bus bar or to a load cable, a vacuum chamber encasing the vacuum valve, an insulating envelope covering the vacuum chamber, the outer surface thereof being covered with an electro-conductive layer thereby to earth the envelope, an insulating lid gas-tightly fitted to the insulating envelope, the lid having an insulating bushing through which an insulating rod penetrates, the insulating rod being connected to an operating mechanism, wherein the insulating rod except a portion exposed from the bushing is gas-tightly confined in insulating gas atmosphere formed between the insulating envelope and the insulating lid.Type: ApplicationFiled: November 12, 2009Publication date: May 20, 2010Applicant: HITACHI, LTD.Inventors: Ayumu MORITA, Takashi SATO, Tomoaki UTSUMI, Makoto YANO, Kenji TSUCHIYA, Masato KOBAYASHI, Shuichi KIKUKAWA, Junichi KATAGIRI
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Patent number: 7679022Abstract: A vacuum insulated switchgear comprising a case having a switch section, a bus-bar section and a cable section, each being partitioned by an earthed metal plate, a vacuum double break three point switch disposed in the switch section and having breaking and disconnecting function, an operator, a bus-bar disposed in the bus-bar section of the case, and a cable connection terminal connected to a cable in the cable section.Type: GrantFiled: January 19, 2007Date of Patent: March 16, 2010Assignee: Hitachi, Ltd.Inventors: Kenji Tsuchiya, Shuichi Kikukawa
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Publication number: 20100025376Abstract: The vacuum insulated switch-gear is configured to be capable of being lifted up with a jack-up bolt to adjust a seated height of the vacuum insulated switch-gear. The switch-gear comprises a nut fixed on a base plate forming a bottom of the vacuum insulated switch-gear. The nut is used as a mating component with the jack-up bolt.Type: ApplicationFiled: July 28, 2009Publication date: February 4, 2010Inventors: Shuichi KIKUKAWA, Kenji Tsuchiya, Yuko Kajiyama, Daisuke Sugai
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Publication number: 20090237869Abstract: Switchgear having a vacuum-insulated switchgear 2 comprising switches having at least breaking and disconnecting functions, each placed in a unit, and solid-insulated bus bars 12 for electrically connecting the switches in each unit; an air-insulated switchgear 1 comprising switches having at least breaking and disconnecting functions, each placed in a unit, and air-insulated bus bars for electrically connecting the switches in each unit; and_the vacuum-insulated switchgear 2 and the air-insulated switchgear 1 are installed side-by-side, wherein the vacuum-insulated switchgear 2 and the air-insulated switchgear 1 are electrically connected through flexible conductors 17 which are provided between the solid-insulated bus bars 12 and the air-insulated bus bars.Type: ApplicationFiled: February 6, 2009Publication date: September 24, 2009Inventors: Shuichi KIKUKAWA, Kenji TSUCHIYA, Yuko KAJIYAMA
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Publication number: 20080067152Abstract: A vacuum insulated switchgear is provided with: an enclosure having a switch block defined by a grounded metal plate, a bus block positioned above the switch block, and a cable block positioned on the rear side of the bus block; a bus provided in the bus block and connected with a fixed contact of a vacuum double-break three-position switch; the vacuum double-break three-position switch provided in the switch block so that its movable contacts are positioned below its fixed contacts; an operating device provided in the switch block so as to be positioned below the vacuum double-break three-position switch; and a lever mechanism that couples together the movable contacts of the vacuum double-break three-position switch and the operating device.Type: ApplicationFiled: August 20, 2007Publication date: March 20, 2008Inventors: Shuichi Kikukawa, Kenji Tsuchiya, Yuko Kajiyama
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Publication number: 20070175866Abstract: A vacuum insulated switchgear comprising a case having a switch section, a bus-bar section and a cable section, each being partitioned by an earthed metal plate, a vacuum double break three point switch disposed in the switch section and having breaking and disconnecting function, an operator, a bus-bar disposed in the bus-bar section of the case, and a cable connection terminal connected to a cable in the cable section.Type: ApplicationFiled: January 19, 2007Publication date: August 2, 2007Inventors: Kenji Tsuchiya, Shuichi Kikukawa
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Patent number: 6335502Abstract: In order to provide a vacuum switch suitable for a distribution and transformation system compatible between structural simplicity and reliability and a vacuum switchgear using the vacuum switch, the vacuum switch comprises switching portions installed in a grounded vacuum container; and a breaker, a grounding switch and an isolator as things having the switching portions, wherein the vacuum container is divided into at least two chambers, and the switching portion of the breaker is disposed in one of the chambers and the switching portions of the grounding switch and the isolator are disposed in the other of the chambers through an insulation body.Type: GrantFiled: January 19, 2000Date of Patent: January 1, 2002Assignee: Hitachi, Ltd.Inventors: Shuichi Kikukawa, Tooru Tanimizu, Minoru Kanoi, Makoto Tazawa, Takuya Miyo
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Patent number: 6259051Abstract: There is disclosed a vacuum insulation switch provided with a movable electrode, a stationary electrode and an earthing electrode, which are insulated from each other, in a vacuum container made of a conductive material which is earthed, and a switchgear using the same. Since the vacuum insulation, which is excellent in the insulation ability, is utilized, the switch is drastically miniaturized and the number of constituent parts are reduced, whereby the manufacturing cost of the switch and the switchgear can be decreased.Type: GrantFiled: May 2, 2000Date of Patent: July 10, 2001Assignee: Hitachi, Ltd.Inventors: Toru Tanimizu, Masato Kobayashi, Shuichi Kikukawa, Ayumu Morita, Minoru Suzuki, Yoshimi Hakamata, Katsunori Kojima, Yozo Shibata, Yoshitomo Gotoh, Makoto Terai, Takuya Okada, Naoki Nakatsugawa