Patents by Inventor Tsutomu Ooishi
Tsutomu Ooishi 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: 10753543Abstract: A steam turbine pipe 1 of an embodiment includes: an upper half side main steam pipe 11 that leads steam to a steam turbine; an upper half side main steam control valve 30 that intervenes in the upper half side main steam pipe 11; and a post-valve drain pipe 31 that is connected to the upper half side main steam control valve 30 and leads drain to an outside. The steam turbine pipe 1 further includes: a shut-off valve 32 that intervenes in the post-valve drain pipe 31; and a branching pipe 60 that makes the post-valve drain pipe 31 on the side closer to the upper half side main steam control valve 30 than is the shut-off valve 32 communicate with the upper half side main steam pipe 11 between the upper half side main steam control valve 30 and a high-pressure turbine 200.Type: GrantFiled: December 18, 2018Date of Patent: August 25, 2020Assignees: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, TOSHIBA PLANT SYSTEMS & SERVICES CORPORATIONInventors: Yuichi Nakamura, Tomoo Ohfuji, Tsutomu Shioyama, Hiroki Shiraishi, Makoto Takahashi, Tsutomu Ooishi, Daisuke Asakura, Toshihiko Endo, Hiroyuki Tao, Tetsuya Yamanaka, Koji Kanbe, Hiroyuki Nishi
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Publication number: 20190120437Abstract: A steam turbine pipe 1 of an embodiment includes: an upper half side main steam pipe 11 that leads steam to a steam turbine; an upper half side main steam control valve 30 that intervenes in the upper half side main steam pipe 11; and a post-valve drain pipe 31 that is connected to the upper half side main steam control valve 30 and leads drain to an outside. The steam turbine pipe 1 further includes: a shut-off valve 32 that intervenes in the post-valve drain pipe 31; and a branching pipe 60 that makes the post-valve drain pipe 31 on the side closer to the upper half side main steam control valve 30 than is the shut-off valve 32 communicate with the upper half side main steam pipe 11 between the upper half side main steam control valve 30 and a high-pressure turbine 200.Type: ApplicationFiled: December 18, 2018Publication date: April 25, 2019Applicants: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, TOSHIBA PLANT SYSTEMS & SERVICES CORPORATIONInventors: Yuichi NAKAMURA, Tomoo Ohfuji, Tsutomu Shioyama, Hiroki Shiraishi, Makoto Takahashi, Tsutomu Ooishi, Daisuke Asakura, Toshihiko Endo, Hiroyuki Tao, Tetsuya Yamanaka, Koji Kanbe, Hiroyuki Nishi
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Publication number: 20190120436Abstract: A steam turbine pipe 1 of an embodiment includes: an upper half side main steam pipe 11 that leads steam to a steam turbine; an upper half side main steam control valve 30 that intervenes in the upper half side main steam pipe 11; and a post-valve drain pipe 31 that is connected to the upper half side main steam control valve 30 and leads drain to an outside. The steam turbine pipe 1 further includes: a shut-off valve 32 that intervenes in the post-valve drain pipe 31; and a branching pipe 60 that makes the post-valve drain pipe 31 on the side closer to the upper half side main steam control valve 30 than is the shut-off valve 32 communicate with the upper half side main steam pipe 11 between the upper half side main steam control valve 30 and a high-pressure turbine 200.Type: ApplicationFiled: December 18, 2018Publication date: April 25, 2019Applicants: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, TOSHIBA PLANT SYSTEMS & SERVICES CORPORATIONInventors: Yuichi Nakamura, Tomoo Ohfuji, Tsutomu Shioyama, Hiroki Shiraishi, Makoto Takahashi, Tsutomu Ooishi, Daisuke Asakura, Toshihiko Endo, Hiroyuki Tao, Tetsuya Yamanaka, Koji Kanbe, Hiroyuki Nishi
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Patent number: 10203069Abstract: A steam turbine pipe 1 of an embodiment includes: an upper half side main steam pipe 11 that leads steam to a steam turbine; an upper half side main steam control valve 30 that intervenes in the upper half side main steam pipe 11; and a post-valve drain pipe 31 that is connected to the upper half side main steam control valve 30 and leads drain to an outside. The steam turbine pipe 1 further includes: a shut-off valve 32 that intervenes in the post-valve drain pipe 31; and a branching pipe 60 that makes the post-valve drain pipe 31 on the side closer to the upper half side main steam control valve 30 than is the shut-off valve 32 communicate with the upper half side main steam pipe 11 between the upper half side main steam control valve 30 and a high-pressure turbine 200.Type: GrantFiled: April 18, 2014Date of Patent: February 12, 2019Assignees: TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, TOSHIBA PLANT SYSTEMS & SERVICES CORPORATIONInventors: Yuichi Nakamura, Tomoo Ohfuji, Tsutomu Shioyama, Hiroki Shiraishi, Makoto Takahashi, Tsutomu Ooishi, Daisuke Asakura, Toshihiko Endo, Hiroyuki Tao, Tetsuya Yamanaka, Koji Kanbe, Hiroryuki Nishi
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Patent number: 9903219Abstract: With a simple structure in which the component count is reduced, the occurrence of noise and vibrations can be prevented in a range from a minute opening degree to the vicinity of an intermediate opening degree, and a pressure loss can be decreased when an opening degree is a fully-open opening degree or the vicinity thereof and thus the efficiency of a steam turbine can be improved.Type: GrantFiled: September 24, 2014Date of Patent: February 27, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tsutomu Ooishi, Shinji Watanabe
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Publication number: 20160208636Abstract: With a simple structure in which the component count is reduced, the occurrence of noise and vibrations can be prevented in a range from a minute opening degree to the vicinity of an intermediate opening degree, and a pressure loss can be decreased when an opening degree is a fully-open opening degree or the vicinity thereof and thus the efficiency of a steam turbine can be improved.Type: ApplicationFiled: September 24, 2014Publication date: July 21, 2016Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsutomu OOISHI, Shinji WATANABE
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Publication number: 20150211387Abstract: A steam turbine pipe 1 in an embodiment is a steam turbine pipe in a steam turbine facility. The steam turbine pipe 1 includes: a steam passage 30a that leads steam from a boiler to a steam turbine; and a branching passage 40 that branches off from the steam passage 30a. The steam turbine pipe 1 further includes: a shutoff valve 32 that intervenes in the branching passage 40; and a reduced pipe part 31b that is provided at a part of the branching passage 40 between the steam passage 30a and the shutoff valve 32 and made by reducing a passage cross section of the branching passage 40.Type: ApplicationFiled: January 20, 2015Publication date: July 30, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsutomu SHIOYAMA, Tsutomu OOISHI, Tomoo OOFUJI, Masanobu WATANABE, Daiki TAKEYAMA
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Publication number: 20140311601Abstract: A steam turbine pipe 1 of an embodiment includes: an upper half side main steam pipe 11 that leads steam to a steam turbine; an upper half side main steam control valve 30 that intervenes in the upper half side main steam pipe 11; and a post-valve drain pipe 31 that is connected to the upper half side main steam control valve 30 and leads drain to an outside. The steam turbine pipe 1 further includes: a shut-off valve 32 that intervenes in the post-valve drain pipe 31; and a branching pipe 60 that makes the post-valve drain pipe 31 on the side closer to the upper half side main steam control valve 30 than is the shut-off valve 32 communicate with the upper half side main steam pipe 11 between the upper half side main steam control valve 30 and a high-pressure turbine 200.Type: ApplicationFiled: April 18, 2014Publication date: October 23, 2014Applicants: Kabushiki Kaisha Toshiba, Toshiba Plant Systems & Services CorporationInventors: Yuichi NAKAMURA, Tomoo Ohfuji, Tsutomu Shioyama, Hiroki Shiraishi, Makoto Takahashi, Tsutomu Ooishi, Daisuke Asakura, Toshihiko Endo, Hiroyuki Tao, Tetsuya Yamanaka, Koji Kanbe, Hiroryuki Nishi
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Patent number: 8690532Abstract: A nozzle box 10 includes: a lead-in pipe 20; a bent pipe 30 connected to the lead-in pipe 20 and formed so as to change a direction of a channel center line 50 to an axial direction of a turbine rotor 212; and an annular pipe 40 connected to the bent pipe 30 and leading steam to a first-stage nozzle 213a while spreading the steam in a circumferential direction of the turbine rotor 212. In the steam channel lead-in part structure 10, from an inlet of the lead-in pipe 20 toward an outlet of the annular pipe 40, steam channel widths Sa-1 to Sn-1 in a first direction intersecting with the channel center line 50 gradually increases and steam channel widths Sa-2 to Sn-2 in a second direction intersecting with the channel center line 50 and perpendicular to the first direction gradually decreases.Type: GrantFiled: March 1, 2010Date of Patent: April 8, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Yasunori Iwai, Tsutomu Ooishi, Yoshiki Niizeki, Taro Kawabata
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Patent number: 8020383Abstract: A steam valve 1 includes: a valve seat 9 being accommodated in a steam flow path of a casing 2 provided with a steam inlet pipe 14 and a steam outlet pipe 15; and a valve body 22, 27 capable of contacting the valve seat 9, the valve body 22, 27 being accommodated in the steam flow path of the casing 2. An expansion part 10 that smoothly projects toward an inside of the steam outlet pipe 15 is disposed at a downstream side on a contact surface of the valve seat 9.Type: GrantFiled: October 2, 2008Date of Patent: September 20, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Tsutomu Ooishi, Tomoo Oofuji, Hideo Hosaka, Yasunori Iwai, Hiroshi Saeki
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Publication number: 20100232958Abstract: A nozzle box 10 includes: a lead-in pipe 20; a bent pipe 30 connected to the lead-in pipe 20 and formed so as to change a direction of a channel center line 50 to an axial direction of a turbine rotor 212; and an annular pipe 40 connected to the bent pipe 30 and leading steam to a first-stage nozzle 213a while spreading the steam in a circumferential direction of the turbine rotor 212. In the steam channel lead-in part structure 10, from an inlet of the lead-in pipe 20 toward an outlet of the annular pipe 40, steam channel widths Sa-1 to Sn-1 in a first direction intersecting with the channel center line 50 gradually increases and steam channel widths Sa-2 to Sn-2 in a second direction intersecting with the channel center line 50 and perpendicular to the first direction gradually decreases.Type: ApplicationFiled: March 1, 2010Publication date: September 16, 2010Inventors: Yasunori IWAI, Tsutomu Ooishi, Yoshiki Niizeki, Taro Kawabata
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Patent number: 7604021Abstract: A steam valve in accordance with the present invention is the steam valve that houses a first valve device 21 composed of a valve seat, a valve body, a valve rod, and a driving device, and a second valve device 22 composed of the valve seat, the valve body, the valve rod, and the driving device, combined with each other in the valve casing 23, and a closing portion 41 to block a part of a main steam flow flowing from outside to inside of a strainer is formed in the strainer 27 that is housed in the valve casing 23 and that surrounds the valve body 29 of the first valve device. According to the above described configuration, the steam valve that is aimed to further decrease a pressure loss can be provided by effectively controlling the steam flow in the strainer housed in the valve casing.Type: GrantFiled: October 29, 2003Date of Patent: October 20, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Fumio Ootomo, Tsutomu Ooishi, Yoshiki Niizeki, Yoshitaka Fukuyama, Hisashi Matsuda, Osamu Shindo
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Publication number: 20090101859Abstract: A steam valve 1 includes: a valve seat 9 being accommodated in a steam flow path of a casing 2 provided with a steam inlet pipe 14 and a steam outlet pipe 15; and a valve body 22, 27 capable of contacting the valve seat 9, the valve body 22, 27 being accommodated in the steam flow path of the casing 2. An expansion part 10 that smoothly projects toward an inside of the steam outlet pipe 15 is disposed at a downstream side on a contact surface of the valve seat 9.Type: ApplicationFiled: October 2, 2008Publication date: April 23, 2009Inventors: Tsutomu Ooishi, Tomoo Oofuji, Hideo Hosaka, Yasunori Iwai, Hiroshi Saeki
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Patent number: 7481058Abstract: A high temperature steam valve has a valve casing including a main steam inlet, a main steam outlet and a valve chest. The high temperature steam valve also has a valve seat positioned in the valve chest, a valve element facing the valve seat, and a valve rod slidably penetrating the valve casing to drive the valve element. A cooling steam hole is provided to surround a valve-rod penetrating portion of the valve casing. Cooling steam can be poured into the cooling steam hole from outside through a cooling steam inlet hole and steam having finished heat exchange can be exhausted from a cooling steam outlet hole into the valve chest. The sliding portion between the valve rod provided in the valve-rod penetrating portion of the valve casing and bush is cooled to prevent oxidized scale from depositing on the sliding portion.Type: GrantFiled: September 8, 2005Date of Patent: January 27, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Masafumi Fukuda, Hideo Hosaka, Tsutomu Ooishi
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Publication number: 20060048513Abstract: A high temperature steam valve has a valve casing including a main steam inlet, a main steam outlet and a valve chest. The high temperature steam valve also has a valve seat positioned in the valve chest, a valve element facing the valve seat, and a valve rod slidably penetrating the valve casing to drive the valve element. A cooling steam hole is provided to surround a valve-rod penetrating portion of the valve casing. Cooling steam can be poured into the cooling steam hole from outside through a cooling steam inlet hole and steam having finished heat exchange can be exhausted from a cooling steam outlet hole into the valve chest. The sliding portion between the valve rod provided in the valve-rod penetrating portion of the valve casing and bush is cooled to prevent oxidized scale from depositing on the sliding portion.Type: ApplicationFiled: September 8, 2005Publication date: March 9, 2006Inventors: Masafumi Fukuda, Hideo Hosaka, Tsutomu Ooishi
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Publication number: 20050268973Abstract: A steam valve in accordance with the present invention is the steam valve that houses a first valve device 21 composed of a valve seat, a valve body, a valve rod, and a driving device, and a second valve device 22 composed of the valve seat, the valve body, the valve rod, and the driving device, combined with each other in the valve casing 23, and a closing portion 41 to block a part of a main steam flow flowing from outside to inside of a strainer is formed in the strainer 27 that is housed in the valve casing 23 and that surrounds the valve body 29 of the first valve device. According to the above described configuration, the steam valve that is aimed to further decrease a pressure loss can be provided by effectively controlling the steam flow in the strainer housed in the valve casing.Type: ApplicationFiled: October 29, 2003Publication date: December 8, 2005Inventors: Fumio Ootomo, Tsutomu Ooishi, Yoshiki Niizeki, Yoshitaka Fukuyama, Hisashi Matsuda, Osamu Shindo
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Patent number: 5038202Abstract: An image transmission system includes a modulating part for independently modulating a luminance signal and two kinds of color difference signals and a demodulating part for independently demodulating the modulated luminance signal and the two kinds of modulated color difference signals. The demodulating part includes a signal correcting part for shifting at least one of the modulated luminance signal and the two kinds of modulated color difference signals by a predetermined number of picture elements in a scanning line direction to correct an error introduced by the modulation.Type: GrantFiled: July 11, 1989Date of Patent: August 6, 1991Assignee: Ricoh Company, Ltd.Inventors: Tsutomu Ooishi, Masaaki Ishikawa, Yasunori Ishikawa, Noboru Murayama, Koichi Suzuki, Koji Kuwata, Hiroshi Shimura