Patents by Inventor Koki Nishimura
Koki Nishimura 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: 11753959Abstract: There is provided a turbine power generation system with a single casing configuration capable of easily executing the inhibition of an over-rotation speed. A turbine power generation system in an embodiment includes: a turbine including a turbine casing and a turbine rotor that rotates by a working medium to be introduced into the turbine casing; and a power generator including a power generator rotor connected to the turbine rotor, the power generator being caused to generate power by rotation of the power generator rotor caused by the rotation of the turbine rotor. The turbine casing of the turbine is single, and a moment of inertia of the power generator rotor is larger than a moment of inertia of the turbine rotor.Type: GrantFiled: June 4, 2021Date of Patent: September 12, 2023Assignee: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa Tashima, Takahiro Yamamoto, Koki Nishimura, Takahiro Ono, Shogo Iwai
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Patent number: 11499445Abstract: The invention provides a CO2 turbine power generation system that can be easily prevented from reaching an overspeed condition. A CO2 turbine power generation system of an embodiment includes a CO2 medium shutoff valve installed in a medium flow path between a regenerative heat exchanger and a combustor. When load rejection is to be performed, the CO2 medium shutoff valve closes to shut off the supply of the medium from the regenerative heat exchanger to the combustor.Type: GrantFiled: June 1, 2021Date of Patent: November 15, 2022Assignee: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro Ono, Takahiro Yamamoto, Koki Nishimura, Tomomi Okuyama, Tsuguhisa Tashima, Shogo Iwai
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Patent number: 11441488Abstract: Shaft stability is enhanced and reliability is improved. In a gas turbine power generation system of an embodiment, a pressurizing unit, a rotation control unit, a diaphragm coupling, a turbine, and a generator are disposed to line up sequentially on the same shaft. A thrust bearing is provided between the turbine and the generator. The turbine is configured such that a working medium flows from the diaphragm coupling side toward the rotation control unit side.Type: GrantFiled: January 6, 2021Date of Patent: September 13, 2022Assignee: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro Ono, Tsuguhisa Tashima, Shogo Iwai, Hideyuki Maeda, Tomomi Okuyama, Koki Nishimura
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Publication number: 20220146606Abstract: Provided is a polarization source having high oxygen resistance and capable of stably transitioning the spin polarization of electron to nucleus even in an environment where oxygen exists. A polarization source for dynamic nuclear polarization containing a molecule represented by the following general formula. One to six of Z1 to Z10 each represent N, and the others each independently represent C—R. R represents a hydrogen atom or a substituent. n represents an integer of 1 to 4.Type: ApplicationFiled: February 28, 2020Publication date: May 12, 2022Inventors: Nobuhiro YANAI, Nobuo KIMIZUKA, Hironori KOUNO, Yusuke KAWASHIMA, Saiya FUJIWARA, Kana ORIHASHI, Koki NISHIMURA, Kenichiro TATEISHI, Tomohiro UESAKA
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Publication number: 20220143223Abstract: Disclosed is a composition of a polarization source dispersed in an aqueous medium. Preferably, the polarization source forms a composite with a host. As the aqueous medium, a hydrogel is also usable in addition to water.Type: ApplicationFiled: February 28, 2020Publication date: May 12, 2022Inventors: Nobuhiro YANAI, Nobuo KIMIZUKA, Yusuke KAWASHIMA, Koki NISHIMURA, Hironori KOUNO, Saiya FUJIWARA, Kenichiro TATEISHI, Tomohiro UESAKA
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Publication number: 20220010686Abstract: There is provided a turbine power generation system with a single casing configuration capable of easily executing the inhibition of an over-rotation speed. A turbine power generation system in an embodiment includes: a turbine including a turbine casing and a turbine rotor that rotates by a working medium to be introduced into the turbine casing; and a power generator including a power generator rotor connected to the turbine rotor, the power generator being caused to generate power by rotation of the power generator rotor caused by the rotation of the turbine rotor. The turbine casing of the turbine is single, and a moment of inertia of the power generator rotor is larger than a moment of inertia of the turbine rotor.Type: ApplicationFiled: June 4, 2021Publication date: January 13, 2022Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa TASHIMA, Takahiro YAMAMOTO, Koki NISHIMURA, Takahiro ONO, Shogo IWAI
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Publication number: 20210381391Abstract: The invention provides a CO2 turbine power generation system that can be easily prevented from reaching an overspeed condition. A CO2 turbine power generation system of an embodiment includes a CO2 medium shutoff valve installed in a medium flow path between a regenerative heat exchanger and a combustor. When load rejection is to be performed, the CO2 medium shutoff valve closes to shut off the supply of the medium from the regenerative heat exchanger to the combustor.Type: ApplicationFiled: June 1, 2021Publication date: December 9, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro ONO, Takahiro YAMAMOTO, Koki NISHIMURA, Tomomi OKUYAMA, Tsuguhisa TASHIMA, Shogo IWAI
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Publication number: 20210262361Abstract: There is provided a turbine in which a sufficient measure against windage loss can be executed. In a turbine of an embodiment, a cooling medium higher in pressure and lower in temperature than a working medium is introduced to the inside from the outside of a turbine casing. Here, in at least a turbine stage of an exhaust stage, the cooling medium passes through a stator blade and thereafter passes through a flow path present between rotor blades and a rotor wheel to flow to an exhaust-stage wheel space.Type: ApplicationFiled: February 8, 2021Publication date: August 26, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa TASHIMA, Takahiro ONO, Shogo IWAI, Daisuke NOMURA, Norikazu TAKAGI, Tomomi OKUYAMA, Koki NISHIMURA
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Publication number: 20210215102Abstract: Shaft stability is enhanced and reliability is improved. In a gas turbine power generation system of an embodiment, a pressurizing unit, a rotation control unit, a diaphragm coupling, a turbine, and a generator are disposed to line up sequentially on the same shaft. A thrust bearing is provided between the turbine and the generator. The turbine is configured such that a working medium flows from the diaphragm coupling side toward the rotation control unit side.Type: ApplicationFiled: January 6, 2021Publication date: July 15, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro ONO, Tsuguhisa TASHIMA, Shogo IWAI, Hideyuki MAEDA, Tomomi OKUYAMA, Koki NISHIMURA
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Publication number: 20210215046Abstract: According to an embodiment, a turbine comprises: a casing; a rotor shaft; turbine stages; a thrust bearing which receives thrust load in the axial direction generated by a flow of a working fluid supplied to the turbine stages; a balance piston which is formed on the rotor shaft along a circumferential direction and projects in a radial direction from the rotor shaft, for adjusting a thrust contact pressure; and a thrust load adjusting mechanism which applies pressures of a pressure-increasing side and a pressure-decreasing side to at least one of a balance piston inner-side chamber and a balance piston outer-side chamber which sandwich the balance piston in the axial direction.Type: ApplicationFiled: December 7, 2020Publication date: July 15, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa TASHIMA, Takahiro ONO, Shogo IWAI, Tomomi OKUYAMA, Hideyuki MAEDA, Koki NISHIMURA
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Patent number: 10253653Abstract: In one embodiment, an exhaust chamber cooling apparatus measures output of a generator driven by a steam turbine, a temperature in an exhaust chamber of the turbine, and a pressure in a condenser that changes steam from the turbine back to water. The apparatus further outputs a first signal when it is detected that a measurement value of the output is larger than a first setting value and a measurement value of the temperature is larger than a second setting value, and a second signal when it is detected that the measurement value of the output is smaller than the first setting value and a measurement value of the pressure or a calculation value obtained from the measurement value of the pressure is larger than a third setting value. The apparatus further controls supply of a cooling fluid into the chamber, based on the first or second signal.Type: GrantFiled: December 10, 2015Date of Patent: April 9, 2019Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Nozomi Tsukuda, Daisuke Ishikawa, Koki Nishimura
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Patent number: 9478349Abstract: Line conductors are provided on one principal surface of a magnetic layer, and line conductors are provided on the other principal surface of the magnetic layer. In addition, side conductors are provided on side surfaces of the magnetic layer to connect the line conductors in a coil shape. A non-magnetic layer is stacked at the one principal surface side of the magnetic layer, and a non-magnetic layer is stacked at the other principal surface side of the magnetic layer. Line conductors are provided within the non-magnetic layer, and line conductors are provided within the non-magnetic layer. Via-hole conductors are provided within the non-magnetic layer to connect the line conductors in parallel with the line conductors. In addition, via-hole conductors are provided within the non-magnetic layer to connect the line conductors in parallel with the line conductors.Type: GrantFiled: February 13, 2015Date of Patent: October 25, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Tomoya Yokoyama, Koki Nishimura
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Publication number: 20160169054Abstract: In one embodiment, an exhaust chamber cooling apparatus measures output of a generator driven by a steam turbine, a temperature in an exhaust chamber of the turbine, and a pressure in a condenser that changes steam from the turbine back to water. The apparatus further outputs a first signal when it is detected that a measurement value of the output is larger than a first setting value and a measurement value of the temperature is larger than a second setting value, and a second signal when it is detected that the measurement value of the output is smaller than the first setting value and a measurement value of the pressure or a calculation value obtained from the measurement value of the pressure is larger than a third setting value. The apparatus further controls supply of a cooling fluid into the chamber, based on the first or second signal.Type: ApplicationFiled: December 10, 2015Publication date: June 16, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Nozomi Tsukuda, Daisuke Ishikawa, Koki Nishimura
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Publication number: 20150162125Abstract: Line conductors are provided on one principal surface of a magnetic layer, and line conductors are provided on the other principal surface of the magnetic layer. In addition, side conductors are provided on side surfaces of the magnetic layer to connect the line conductors in a coil shape. A non-magnetic layer is stacked at the one principal surface side of the magnetic layer, and a non-magnetic layer is stacked at the other principal surface side of the magnetic layer. Line conductors are provided within the non-magnetic layer, and line conductors are provided within the non-magnetic layer. Via-hole conductors are provided within the non-magnetic layer to connect the line conductors in parallel with the line conductors. In addition, via-hole conductors are provided within the non-magnetic layer to connect the line conductors in parallel with the line conductors.Type: ApplicationFiled: February 13, 2015Publication date: June 11, 2015Inventors: Tomoya Yokoyama, Koki Nishimura
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Patent number: 6021541Abstract: A toothbrush is manufactured by planting sheath/core type composite fibers in a planting base, wherein the sheath/core type composite fiber further comprises: a composite portion consisting of a sheath portion made from polyester resin and 2 to 5 of core portions made from polyamide resin dispersed therein having a predetermined length from a planted base portion; and 2 to 5 of exposed core filament portions obtained by exposing the core portions only having a predetermined length on an end side from the composite portion.Type: GrantFiled: December 1, 1998Date of Patent: February 8, 2000Assignee: Sunstar, Inc.Inventors: Toyokazu Mori, Shinya Sakurai, Hitoshi Matsumoto, Koki Nishimura, Koichi Kubo