Patents by Inventor Daisuke Sugai
Daisuke Sugai 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: 8975550Abstract: A switch unit includes a plurality of switches, which are linearly disposed. The movable electrode in one switch and the fixed electrode in another switch are electrically connected to each other.Type: GrantFiled: January 5, 2012Date of Patent: March 10, 2015Assignee: Hitachi, Ltd.Inventors: Daisuke Sugai, Takashi Sato, Tomoaki Utsumi, Takashi Shirone, Kazuhiro Satou, Takafumi Hosono
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Publication number: 20150021298Abstract: Switchgear comprising: an air-insulated earthing disconnecting switch switchable among the closing position, disconnecting position, and earthing position; a vacuum interrupter electrically connected to the air-insulated earthing disconnecting switch; an operating device of the air-insulated earthing disconnecting switch having a motor; and an operating-force transmission unit transmitting driving force from the motor to a movable electrode of the air-insulated earthing disconnecting switch, wherein the operating-force transmission unit includes an operation rod fixedly coupled to the movable electrode, a shaft rotatably driven by the motor, a lever fixed to the shaft and making an arc motion with the shaft rotatably driven, a coupling pin coupling the lever and the operation rod, and limit switches detecting that the air-insulated earthing disconnecting switch is in the closing position, disconnecting position, or earthing position by means of the coupling pin driven by the operation of the rod operating witType: ApplicationFiled: July 17, 2014Publication date: January 22, 2015Inventors: Masashi SAWADA, Daisuke SUGAI
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Patent number: 8576545Abstract: A switchgear includes a chassis which is partitioned by metal earthed plates and includes a bus bar section located at a central portion, a switch section located below the bus bar section, a cable section located at a rear surface side, and a control section located at a front surface side; an air-insulated earthed disconnecting switch provided in the switch section; and a manipulating device. The switch section is separable from the chassis, and is configured as a case having a semi-closed structure which allows air to pass therethrough but prevents particles of oil and water from passing therethrough.Type: GrantFiled: August 15, 2011Date of Patent: November 5, 2013Assignee: Hitachi, Ltd.Inventors: Keiichi Takahashi, Kenji Tsuchiya, Ayumu Morita, Masato Kobayashi, Daisuke Sugai
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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: 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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Publication number: 20120175234Abstract: A switch unit includes a plurality of switches, which are linearly disposed. The movable electrode in one switch and the fixed electrode in another switch are electrically connected to each other.Type: ApplicationFiled: January 5, 2012Publication date: July 12, 2012Applicant: Hitachi, Ltd.Inventors: Daisuke SUGAI, Takashi Sato, Tomoaki Utsumi, Takashi Shirone, Kazuhiro Satou, Takafumi Hosono
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Patent number: 8168909Abstract: A vacuum switchgear comprising a vacuum container, two fixed contacts and two movable contacts for being in contact with and out of contact with the fixed contacts which are disposed in the vacuum container, and two operation rods linked to the each movable contact, respectively, characterized that a connection conductor having a current collector for making electrical sliding contact with the external surface of the each operation rod, which is fixed to outlet parts of the vacuum containers, from which extend the operation rod outwardly.Type: GrantFiled: December 23, 2008Date of Patent: May 1, 2012Assignee: Hitachi, Ltd.Inventors: Masato Kobayashi, Kenji Tsuchiya, Daisuke Sugai
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Publication number: 20120044616Abstract: A switchgear includes a chassis which is partitioned by metal earthed plates and includes a bus bar section located at a central portion, a switch section located below the bus bar section, a cable section located at a rear surface side, and a control section located at a front surface side; an air-insulated earthed disconnecting switch provided in the switch section; and a manipulating device. The switch section is separable from the chassis, and is configured as a case having a semi-closed structure which allows air to pass therethrough but prevents particles of oil and water from passing therethrough.Type: ApplicationFiled: August 15, 2011Publication date: February 23, 2012Inventors: Keiichi TAKAHASHI, Kenji Tsuchiya, Ayumu Morita, Masato Kobayashi, Daisuke Sugai
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Patent number: 8008594Abstract: A vacuum insulated switchgear has a busbar compartment, in which phase-segregated double-break, three-position vacuum circuit breakers are disposed; and feeder compartments disposed at both sides of the busbar compartment respectively, in each of which phase-segregated double-break, three-position vacuum circuit breakers are disposed. The busbar compartment and the feeder compartments are aligned in a row, and a second-phase insulated busbar is provided to connect one of the fixed contacts of a second-phase breaker in the busbar compartment to a fixed contact of a second-phase breaker in one of the feeder compartments. A first-phase insulated busbar is provided to connect one of the fixed contacts of a first-phase breaker in the busbar compartment to a fixed contact of a first-phase breaker in one of the feeder compartments adjacent to the busbar compartment, and the second-phase insulated busbar and the first-phase insulated busbar are disposed in different positions in height.Type: GrantFiled: July 14, 2008Date of Patent: August 30, 2011Assignee: Hitachi, Ltd.Inventors: Takuya Kurogi, Kenji Tsuchiya, Daisuke Sugai
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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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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: 20090173719Abstract: A vacuum switchgear comprising a vacuum container, two fixed contacts and two movable contacts for being in contact with and out of contact with the fixed contacts which are disposed in the vacuum container, and two operation rods linked to the each movable contact, respectively, characterized in that: a connection conductor having a current collector for making electrical sliding contact with the external surface of the each operation rod, which is fixed to outlet parts of the vacuum containers, from which extend the operation rod outwardly.Type: ApplicationFiled: December 23, 2008Publication date: July 9, 2009Inventors: Masato Kobayashi, Kenji Tsuchiya, Daisuke Sugai
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Publication number: 20090020507Abstract: A vacuum insulated switchgear has a busbar compartment, in which phase-segregated double-break, three-position vacuum circuit breakers are disposed; and feeder compartments disposed at both sides of the busbar compartment respectively, in each of which phase-segregated double-break, three-position vacuum circuit breakers are disposed. The busbar compartment and the feeder compartments are aligned in a row, and a second-phase insulated busbar is provided to connect one of the fixed contacts of a second-phase breaker in the busbar compartment to a fixed contact of a second-phase breaker in one of the feeder compartments A first-phase insulated busbar is provided to connect one of the fixed contacts of a first-phase breaker in the busbar compartment to a fixed contact of a first-phase breaker in one of the feeder compartments adjacent to the busbar compartment, and the second-phase insulated busbar and the first-phase insulated busbar are disposed in different positions in height.Type: ApplicationFiled: July 14, 2008Publication date: January 22, 2009Inventors: Takuya KUROGI, Kenji Tsuchiya, Daisuke Sugai
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Patent number: 7223932Abstract: Disclosed is a vacuum switchgear comprising an electro-conductive outer vacuum container, a plurality of inner container disposed in the outer vacuum container. The inner containers and the outer container are electrically isolated from each other. The outer container is made of stainless steel plate, for example. One of the inner vacuum containers accommodates a ground switch for keeping the circuit open while the switchgear is opened, having a movable electrode connected to an operating mechanism, and a fixed electrode connected to fixed electrode rod. Another inner vacuum container accommodates a function switch capable of having at least one of functions of a circuit breaker, a disconnector and a load switch. A plurality of electrode shields each surrounds the electrodes of the ground switch and of the function switch. The ground switch and the function switch are disposed in separate vacuum inner containers, respectively.Type: GrantFiled: June 20, 2006Date of Patent: May 29, 2007Assignee: Hitachi, Ltd.Inventors: Masato Kobayashi, Kenji Tsuchiya, Satoru Kajiwara, Daisuke Sugai, Hironori Tonosaki
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Patent number: 7135652Abstract: Disclosed is a vacuum switchgear comprising an electro-conductive outer vacuum container, a plurality of inner container disposed in the outer vacuum container. The inner containers and the outer container are electrically isolated from each other. The outer container is made of stainless steel plate, for example. One of the inner vacuum containers accommodates a ground switch for keeping the circuit open while the switchgear is opened, having a movable electrode connected to an operating mechanism, and a fixed electrode connected to fixed electrode rod. Another inner vacuum container accommodates a function switch capable of having at least one of functions of a circuit breaker, a disconnector and a load switch. A plurality of electrode shields each surrounds the electrodes of the ground switch and of the function switch. The ground switch and the function switch are disposed in separate vacuum inner containers, respectively.Type: GrantFiled: May 14, 2004Date of Patent: November 14, 2006Assignee: Hitachi, Ltd.Inventors: Masato Kobayashi, Kenji Tsuchiya, Satoru Kajiwara, Daisuke Sugai, Hironori Tonosaki
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Publication number: 20060237394Abstract: Disclosed is a vacuum switchgear comprising an electro-conductive outer vacuum container, a plurality of inner container disposed in the outer vacuum container. The inner containers and the outer container are electrically isolated from each other. The outer container is made of stainless steel plate, for example. One of the inner vacuum containers accommodates a ground switch for keeping the circuit open while the switchgear is opened, having a movable electrode connected to an operating mechanism, and a fixed electrode connected to fixed electrode rod. Another inner vacuum container accommodates a function switch capable of having at least one of functions of a circuit breaker, a disconnector and a load switch. A plurality of electrode shields each surrounds the electrodes of the ground switch and of the function switch. The ground switch and the function switch are disposed in separate vacuum inner containers, respectively.Type: ApplicationFiled: June 20, 2006Publication date: October 26, 2006Inventors: Masato Kobayashi, Kenji Tsuchiya, Satoru Kajiwara, Daisuke Sugai, Hironori Tonosaki
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Publication number: 20040232112Abstract: Disclosed is a vacuum switchgear comprising an electro-conductive outer vacuum container, a plurality of inner container disposed in the outer vacuum container. The inner containers and the outer container are electrically isolated from each other. The outer container is made of stainless steel plate, for example. One of the inner vacuum containers accommodates a ground switch for keeping the circuit open while the switchgear is opened, having a movable electrode connected to an operating mechanism, and a fixed electrode connected to fixed electrode rod. Another inner vacuum container accommodates a function switch capable of having at least one of functions of a circuit breaker, a disconnector and a load switch. A plurality of electrode shields each surrounds the electrodes of the ground switch and of the function switch. The ground switch and the function switch are disposed in separate vacuum inner containers, respectively.Type: ApplicationFiled: May 14, 2004Publication date: November 25, 2004Inventors: Masato Kobayashi, Kenji Tsuchiya, Satoru Kajiwara, Daisuke Sugai, Hironori Tonosaki