Patents by Inventor Norikazu Takagi
Norikazu Takagi 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: 11940114Abstract: An optical device includes: a light guide plate having a group of optical-path deflectors configured to change the optical path of light from a first light source to form an image in the space within a first angle range, and change the optical path of light from a second light source to form an image in the space within a second angle range, wherein the first angle range and the second angle range are separated from each other or adjoining each other.Type: GrantFiled: January 23, 2019Date of Patent: March 26, 2024Assignee: OMRON CorporationInventors: Yoshihiko Takagi, Masayuki Shinohara, Yasuhiro Tanoue, Gouo Kurata, Norikazu Kitamura
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Patent number: 11566539Abstract: According to an embodiment, a gas turbine includes: a casing; a rotor shaft penetrating through the casing; a plurality of turbine stages which are in the casing and are arranged along an axial direction of the rotor shaft and through which a working fluid passes; two bearings disposed on outer sides of the casing in terms of the axial direction and supporting the rotor shaft in a rotatable manner; and a plurality of outlet pipes through which the working fluid having finished work in the turbine stages is discharged. The outlet pipes are provided in an upper half and a lower half of the casing.Type: GrantFiled: June 9, 2021Date of Patent: January 31, 2023Assignee: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa Tashima, Shogo Iwai, Takahiro Ono, Norikazu Takagi
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Patent number: 11459900Abstract: According to an embodiment, a turbine stator blade disposed in a working fluid flow path in a casing of a gas turbine, includes: a blade effective part disposed in the working fluid flow path; an outer circumferential sidewall having a plate-shaped part that is connected to a radially outer end portion of the blade effective part, and hooks each extending radially outward and circumferentially from the plate-shaped part and having a tip engaged with the casing; and an inner circumferential sidewall connected to a radially inner end portion of the blade effective part. At least one slit is formed at the rear hook or front hook to divide the hook in a circumferential direction, and the hook has a seal member to seal the slit.Type: GrantFiled: June 9, 2021Date of Patent: October 4, 2022Assignee: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Norikazu Takagi, Tsuguhisa Tashima, Daisuke Nomura, Yoshifumi Iwasaki, Shogo Iwai, Takahiro Ono
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Patent number: 11274555Abstract: A turbine rotor of an embodiment includes a rotor body portion having turbine discs in plural stages in an axial direction protruding radially outside from an outer peripheral surface of the rotor body portion over a circumferential direction. The turbine rotor includes a plurality of axial passages, through which a cooling medium flows, formed at the rotor body portion radially outside than a center axis of the turbine rotor and radially inside than an outer peripheral surface of the rotor body portion in the axial direction; an introduction passage introducing the cooling medium into each of the axial passages; and discharge passages that penetrate from each of the axial passages to the outer peripheral surface of the rotor body portion to discharge the cooling medium.Type: GrantFiled: November 25, 2020Date of Patent: March 15, 2022Assignee: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa Tashima, Takahiro Ono, Shogo Iwai, Yoshifumi Iwasaki, Norikazu Takagi
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Publication number: 20220065131Abstract: According to an embodiment, a gas turbine includes: a casing; a rotor shaft penetrating through the casing; a plurality of turbine stages which are in the casing and are arranged along an axial direction of the rotor shaft and through which a working fluid passes; two bearings disposed on outer sides of the casing in terms of the axial direction and supporting the rotor shaft in a rotatable manner; and a plurality of outlet pipes through which the working fluid having finished work in the turbine stages is discharged. The outlet pipes are provided in an upper half and a lower half of the casing.Type: ApplicationFiled: June 9, 2021Publication date: March 3, 2022Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa TASHIMA, Shogo IWAI, Takahiro ONO, Norikazu TAKAGI
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Publication number: 20210388731Abstract: According to an embodiment, a turbine stator blade disposed in a working fluid flow path in a casing of a gas turbine, includes: a blade effective part disposed in the working fluid flow path; an outer circumferential sidewall having a plate-shaped part that is connected to a radially outer end portion of the blade effective part, and hooks each extending radially outward and circumferentially from the plate-shaped part and having a tip engaged with the casing; and an inner circumferential sidewall connected to a radially inner end portion of the blade effective part. At least one slit is formed at the rear hook or front hook to divide the hook in a circumferential direction, and the hook has a seal member to seal the slit.Type: ApplicationFiled: June 9, 2021Publication date: December 16, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Norikazu TAKAGI, Tsuguhisa TASHIMA, Daisuke NOMURA, Yoshifumi IWASAKI, Shogo IWAI, Takahiro ONO
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Publication number: 20210285331Abstract: According to an embodiment, a turbine stator blade disposed in a working fluid flow path in a casing of a gas turbine, comprises: a blade effective part disposed in the working fluid flow path; an outer ring sidewall having a plate-shaped portion connecting to a radially outer end portion of the blade effective part, a front hook extending radially outward and circumferentially from the plate-shaped portion and having a tip fitting with the casing, a rear hook extending radially outward and circumferentially from the plate-shaped portion and having a tip fitting with the casing; and a reinforcing member that maintains an interval between the front hook and the rear hook; and an inner ring sidewall connected to a radially inner end portion of the blade effective part.Type: ApplicationFiled: February 23, 2021Publication date: September 16, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Norikazu TAKAGI, Tsuguhisa TASHIMA, Daisuke NOMURA, Yoshifumi IWASAKI, Shogo IWAI, Takahiro ONO
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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: 20210172321Abstract: A turbine rotor of an embodiment includes a rotor body portion having turbine discs in plural stages in an axial direction protruding radially outside from an outer peripheral surface of the rotor body portion over a circumferential direction. The turbine rotor includes a plurality of axial passages, through which a cooling medium flows, formed at the rotor body portion radially outside than a center axis of the turbine rotor and radially inside than an outer peripheral surface of the rotor body portion in the axial direction; an introduction passage introducing the cooling medium into each of the axial passages; and discharge passages that penetrate from each of the axial passages to the outer peripheral surface of the rotor body portion to discharge the cooling medium.Type: ApplicationFiled: November 25, 2020Publication date: June 10, 2021Applicant: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Tsuguhisa TASHIMA, Takahiro ONO, Shogo IWAI, Yoshifumi IWASAKI, Norikazu TAKAGI
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Patent number: 10738658Abstract: An axial flow turbine according to an embodiment includes: an outer casing; an inner casing provided inside the outer casing; a discharge pipe that is welded and joined to the outer casing and through which a working fluid discharged from the axial flow turbine flows; a sleeve that is provided inside the outer casing and the discharge pipe and guides the working fluid discharged from the axial flow turbine to the discharge pipe; a tubular member that is provided over an outer periphery of the sleeve inside the outer casing and the discharge pipe and covers an inner periphery side of a joint portion between the outer casing and the discharge pipe; an introduction port that introduces a cooling medium into a space demarcated by the outer casing, the discharge pipe, and the tubular member; and a discharge port that discharges the cooling medium introduced into the space.Type: GrantFiled: April 19, 2018Date of Patent: August 11, 2020Assignee: Toshiba Energy Systems & Solutions CorporationInventors: Tomohiro Tejima, Tsuguhisa Tashima, Norikazu Takagi, Shogo Iwai
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Patent number: 10662817Abstract: A steam turbine according to an embodiment includes an outer casing, an inner casing, a turbine rotor, and a pair of inner casing regulating portions. The pair of inner casing regulating portions regulates movement of the inner casing in a direction orthogonal to an axial direction of the turbine rotor. The pair of inner casing regulating portions is disposed beneath the inner casing at positions different from each other in the axial direction and is supported by a regulating supporting portion extending upward from a bottom portion of the outer casing.Type: GrantFiled: November 21, 2017Date of Patent: May 26, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Norikazu Takagi, Takahiro Ono, Tsuguhisa Tashima, Shogo Iwai, Daichi Fukabori
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Patent number: 10145254Abstract: A sealing structure according to the embodiment includes a first cylinder, a second cylinder, an intermediate cylinder, a first sealing part, and a second sealing part. The first cylinder forms a flow passage of a working fluid of a turbine therein. The second cylinder is disposed at one end of the first cylinder and downstream from the flow passage. The intermediate cylinder is disposed between the first and second cylinders. The first sealing part is disposed at one of a first region between the first cylinder and the intermediate cylinder and a second region between the second cylinder and the intermediate cylinder, and follows a positional displacement in a radial direction. The second sealing part is disposed at the other of the first and second regions, and follows a positional displacement in an axial direction.Type: GrantFiled: September 18, 2015Date of Patent: December 4, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Norikazu Takagi, Shogo Iwai
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Patent number: 10130544Abstract: A pneumatic massage apparatus making it possible to perform even more efficient drainage is provided. A pneumatic massage apparatus includes a massage device to be fitted to wrap around at least one of an arm or leg of a patient and having a plurality of air chambers disposed in series in a proximal direction from a distal position of the at least one of an arm and a leg toward the center of the patient's body, and a compressed air control unit configured to supply compressed air into the plurality of air chambers to pressurize them, and discharge compressed air from the plurality air chambers to depressurize them. The compressed air control unit is configured to depressurize the pressurized air chambers in such a manner that, of any pair of mutually adjacent air chambers, a proximal air chamber of the pair first starts to be depressurized, and then a distal air chamber of the pair starts to be depressurized.Type: GrantFiled: February 20, 2015Date of Patent: November 20, 2018Assignee: NITTO KOHKI CO., LTD.Inventors: Norikazu Takagi, Haruki Nakao, Jiro Maegawa
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Publication number: 20180238194Abstract: An axial flow turbine according to an embodiment includes: an outer casing; an inner casing provided inside the outer casing; a discharge pipe that is welded and joined to the outer casing and through which a working fluid discharged from the axial flow turbine flows; a sleeve that is provided inside the outer casing and the discharge pipe and guides the working fluid discharged from the axial flow turbine to the discharge pipe; a tubular member that is provided over an outer periphery of the sleeve inside the outer casing and the discharge pipe and covers an inner periphery side of a joint portion between the outer casing and the discharge pipe; an introduction port that introduces a cooling medium into a space demarcated by the outer casing, the discharge pipe, and the tubular member; and a discharge port that discharges the cooling medium introduced into the space.Type: ApplicationFiled: April 19, 2018Publication date: August 23, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Tomohiro TEJIMA, Tsuguhisa TASHIMA, Norikazu TAKAGI, Shogo IWAI
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Publication number: 20180142573Abstract: A steam turbine according to an embodiment includes an outer casing, an inner casing, a turbine rotor, and a pair of inner casing regulating portions. The pair of inner casing regulating portions regulates movement of the inner casing in a direction orthogonal to an axial direction of the turbine rotor. The pair of inner casing regulating portions is disposed beneath the inner casing at positions different from each other in the axial direction and is supported by a regulating supporting portion extending upward from a bottom portion of the outer casing.Type: ApplicationFiled: November 21, 2017Publication date: May 24, 2018Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Energy Systems & Solutions CorporationInventors: Norikazu TAKAGI, Takahiro ONO, Tsuguhisa TASHIMA, Shogo IWAI, Daichi FUKABORI
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Patent number: 9464535Abstract: A stationary part sealing structure 10 of an embodiment has an insertion groove 20 formed annularly across a circumferential direction in a wall surface 111a and having a groove part 21 and projections 25, 26 projecting respectively from both side faces of the groove part 21 so as to narrow an opening 22 of the groove part 21, an insertion groove 30 formed annularly across a circumferential direction in a wall surface 110a which opposes the insertion groove 20 and having a groove part 31 and projections 35, 36 projecting respectively from both side faces of the groove part 31 so as to narrow an opening 32 of the groove part 31, and a platy annular sealing member 40 having an outer diameter side end 41 inserted in the insertion groove 20 and an inner diameter side end 42 inserted in the insertion groove 30.Type: GrantFiled: May 27, 2014Date of Patent: October 11, 2016Assignee: KABUSHIKI KAISHA TOSHIBAInventor: Norikazu Takagi
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Publication number: 20160242984Abstract: A pneumatic massage apparatus making it possible to perform even more efficient drainage is provided. The pneumatic massage apparatus includes a massage device to be fitted to wrap around at least one of an arm or leg of a patient and having a plurality of air chambers disposed in series in a proximal direction from a distal position of the at least one of an arm and a leg toward the center of the patient's body when the massage device is fitted around the at least one of a arm and a leg, and a compressed air control unit configured to supply compressed air into the plurality of air chambers to pressurize them, and discharge compressed air from the plurality air chambers to depressurize them. The compressed air control unit is configured to depressurize the pressurized air chambers in such a manner that, of any pair of mutually adjacent air chambers, a proximal air chamber of the pair first starts to be depressurized, and then a distal air chamber of the pair starts to be depressurized.Type: ApplicationFiled: February 20, 2015Publication date: August 25, 2016Inventors: Norikazu TAKAGI, Haruki NAKAO, Jiro MAEGAWA
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Publication number: 20160084098Abstract: A sealing structure according to the embodiment includes a first cylinder, a second cylinder, an intermediate cylinder, a first sealing part, and a second sealing part. The first cylinder forms a flow passage of a working fluid of a turbine therein. The second cylinder is disposed at one end of the first cylinder and downstream from the flow passage. The intermediate cylinder is disposed between the first and second cylinders. The first sealing part is disposed at one of a first region between the first cylinder and the intermediate cylinder and a second region between the second cylinder and the intermediate cylinder, and follows a positional displacement in a radial direction. The second sealing part is disposed at the other of the first and second regions, and follows a positional displacement in an axial direction.Type: ApplicationFiled: September 18, 2015Publication date: March 24, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Norikazu TAKAGI, Shogo IWAI
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Publication number: 20140346741Abstract: A stationary part sealing structure 10 of an embodiment has an insertion groove 20 formed annularly across a circumferential direction in a wall surface 111a and having a groove part 21 and projections 25, 26 projecting respectively from both side faces of the groove part 21 so as to narrow an opening 22 of the groove part 21, an insertion groove 30 formed annularly across a circumferential direction in a wall surface 110a which opposes the insertion groove 20 and having a groove part 31 and projections 35, 36 projecting respectively from both side faces of the groove part 31 so as to narrow an opening 32 of the groove part 31, and a platy annular sealing member 40 having an outer diameter side end 41 inserted in the insertion groove 20 and an inner diameter side end 42 inserted in the insertion groove 30.Type: ApplicationFiled: May 27, 2014Publication date: November 27, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Norikazu TAKAGI
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Patent number: 4770225Abstract: A mold-release agent injection nozzle is provided in the portion of the die casting machine leading to the mold cavity or in the mold. A mold-release agent is then spray applied to the surfaces of the mold through the nozzle while the mold is closed. The surplus mold-release agent is then discharged through a vent port having a displaceable valve.Type: GrantFiled: January 11, 1988Date of Patent: September 13, 1988Assignee: Asmo Co., Ltd.Inventors: Norikazu Takagi, Yoshihiko Iwasaki, Ryuji Koyama