Patents by Inventor Ryoma Kato
Ryoma Kato 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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Publication number: 20240100937Abstract: A cooling system mounted in a vehicle includes a motor that is a drive source of the vehicle; an inverter that drives the motor; a radiator; a washer liquid tank that stores a cleaning liquid for cleaning a windshield of the vehicle; and a circulation channel that allows the cleaning liquid stored in the washer liquid tank to circulate through the inverter, the motor, the radiator, and the washer liquid tank in an order presented, thereby causing the cleaning liquid to store heat of the motor and the inverter and also causing heat of the cleaning liquid to be dissipated by the radiator.Type: ApplicationFiled: September 25, 2023Publication date: March 28, 2024Inventors: Ryoma NISHIMURA, Kota KATO
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Publication number: 20240058887Abstract: Provided is a frame member obtained by joining a first steel sheet member and a second steel sheet member at a spot-welding portion by spot welding. A cross-sectional region in which a cross section perpendicular to a longitudinal direction of the frame member is a closed cross section is formed, the first steel sheet member has a tensile strength of 1,900 MPa or more, and the spot-welding portion has a molten metal portion formed by the spot welding and a heat-affected portion adjacent to an outside of the molten metal portion. Average Vickers hardness HvAve at a measurement position corresponding to the first region on the virtual straight line and minimum Vickers hardness HvMin at a measurement position corresponding to the third region on the virtual straight line satisfy HvAve?HvMin?100.Type: ApplicationFiled: April 14, 2022Publication date: February 22, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Ryoma KATO, Takahiro AITOH, Shingo FUJINAKA, Yuri TODA
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Patent number: 8126105Abstract: A fast reactor having a reflector control system is provided which decreases the change in reactivity of the reactor core with time without performing control of a reflector lifting speed and that of a water flow rate. The above fast reactor has a liquid metal coolant, a reactor core immersed therein, and a neutron reflector which is provided outside the reactor core and which is moved in a vertical direction for adjusting leakage of neutrons therefrom for controlling the reactivity of the reactor core. The neutron reflector described above is gradually moved in an upward direction with the change in reactivity caused by fuel burn-up, and at least a part of a lower region of the neutron reflector is a high reflection region having a high neutron reflection ability as compared to that of the other region. The high reflection region is located from the bottom to a place between one fourth and one half of the height of the neutron reflector from the bottom end thereof.Type: GrantFiled: November 19, 2010Date of Patent: February 28, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Tsugio Yokoyama, Mitsuaki Yamaoka, Yasuyuki Moriki, Ryoma Kato, Yasushi Tsuboi, Atsuko Matsuda
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Publication number: 20110103535Abstract: A fast reactor having a reflector control system is provided which decreases the change in reactivity of the reactor core with time without performing control of a reflector lifting speed and that of a water flow rate. The above fast reactor has a liquid metal coolant, a reactor core immersed therein, and a neutron reflector which is provided outside the reactor core and which is moved in a vertical direction for adjusting leakage of neutrons therefrom for controlling the reactivity of the reactor core. The neutron reflector described above is gradually moved in an upward direction with the change in reactivity caused by fuel burn-up, and at least a part of a lower region of the neutron reflector is a high reflection region having a high neutron reflection ability as compared to that of the other region. The high reflection region is located from the bottom to a place between one fourth and one half of the height of the neutron reflector from the bottom end thereof.Type: ApplicationFiled: November 19, 2010Publication date: May 5, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsugio YOKOYAMA, Mitsuaki Yamaoka, Yasuyuki Moriki, Ryoma Kato, Yasushi Tsuboi, Atsuko Matsuda
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Patent number: 7864913Abstract: A fast reactor having a reflector control system is provided which decreases the change in reactivity of the reactor core with time without controlling a reflector lifting speed and a water flow rate. The fast reactor has a neutron reflector provided outside the reactor core and which is moved in a vertical direction for adjusting neutron leakage to control the reactivity of the reactor core. The neutron reflector is moved in an upward direction with the change in reactivity caused by fuel burn-up. At least a part of a lower region of the neutron reflector may be a region having a high neutron reflection ability as compared to that of the other region. The high reflection region is located at the bottom of the neutron reflector and extends from between one fourth and one half of the height of the neutron reflector.Type: GrantFiled: February 18, 2005Date of Patent: January 4, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Tsugio Yokoyama, Mitsuaki Yamaoka, Yasuyuki Moriki, Ryoma Kato, Yasushi Tsuboi, Atsuko Matsuda
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Patent number: 7773716Abstract: A fast reactor having a reflector control system is provided which decreases the change in reactivity of the reactor core with time without controlling reflector lifting speed and a water flow rate. The reactor has a liquid metal coolant, a reactor core immersed therein, and a neutron reflector provided outside the core and is moved in a vertical direction for adjusting leakage of neutrons therefrom for controlling the reactivity of the core. The reflector described above is gradually moved in an upward direction with the change in reactivity caused by fuel burn-up, and at least a part of a lower region of the reflector is a high reflection region having a high neutron reflection ability as compared to that of the other region. The high reflection region is located between the bottom and one fourth and one half of the height of the neutron reflector.Type: GrantFiled: July 2, 2008Date of Patent: August 10, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Tsugio Yokoyama, Mitsuaki Yamaoka, Yasuyuki Moriki, Ryoma Kato, Yasushi Tsuboi, Atsuko Matsuda
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Publication number: 20080273650Abstract: A fast reactor having a reflector control system is provided which decreases the change in reactivity of the reactor core with time without performing control of a reflector lifting speed and that of a water flow rate. The above fast reactor has a liquid metal coolant, a reactor core immersed therein, and a neutron reflector which is provided outside the reactor core and which is moved in a vertical direction for adjusting leakage of neutrons therefrom for controlling the reactivity of the reactor core. The neutron reflector described above is gradually moved in an upward direction with the change in reactivity caused by fuel burn-up, and at least a part of a lower region of the neutron reflector is a high reflection region having a high neutron reflection ability as compared to that of the other region. The high reflection region is located from the bottom to a place between one fourth and one half of the height of the neutron reflector from the bottom end thereof.Type: ApplicationFiled: July 2, 2008Publication date: November 6, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsugio Yokoyama, Mitsuaki Yamaoka, Yasuyuki Moriki, Ryoma Kato, Yasushi Tsuboi, Atsuko Matsuda
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Publication number: 20080130820Abstract: A fuel inlet mechanism to introduce a coolant into a fuel assembly configured to be charged in a light water nuclear reactor, includes, a filter catching a foreign substance included in the coolant on an upstream side of the fuel assembly, the filter having a plurality of through holes to pass the coolant, and the through holes having an inlet portion, an outlet portion and at least one bent portion to a degree by which the outlet portion cannot be seen through from the inlet portion by a straight line.Type: ApplicationFiled: September 10, 2007Publication date: June 5, 2008Inventors: Masaru UKAI, Kosaku Tsumita, Ryoma Kato, Kenjiro Fukamichi, Yuji Yamada, Makoto Sato, Tadaaki Shimazu, Tomoharu Tanabe, Hirotoshi Matsumura, Keiji Matsunaga, Ken Okuda
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Publication number: 20050276367Abstract: A fuel inlet mechanism to introduce a coolant into a fuel assembly configured to be charged in a light water nuclear reactor, includes, a filter catching a foreign substance included in the coolant on an upstream side of the fuel assembly, the filter having a plurality of through holes to pass the coolant, and the through holes having an inlet portion, an outlet portion and at least one bent portion to a degree by which the outlet portion cannot be seen through from the inlet portion by a straight line.Type: ApplicationFiled: August 22, 2005Publication date: December 15, 2005Inventors: Masaru Ukai, Kosaku Tsumita, Ryoma Kato, Kenjiro Fukamichi, Yuji Yamada, Makoto Sato, Tadaaki Shimazu, Tomoharu Tanabe, Hirotoshi Matsumura, Keiji Matsunaga, Ken Okuda
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Publication number: 20050220251Abstract: A fast reactor having a reflector control system is provided which decreases the change in reactivity of the reactor core with time without performing control of a reflector lifting speed and that of a water flow rate. The above fast reactor has a liquid metal coolant, a reactor core immersed therein, and a neutron reflector which is provided outside the reactor core and which is moved in a vertical direction for adjusting leakage of neutrons therefrom for controlling the reactivity of the reactor core. The neutron reflector described above is gradually moved in an upward direction with the change in reactivity caused by fuel burn-up, and at least a part of a lower region of the neutron reflector is a high reflection region having a high neutron reflection ability as compared to that of the other region. The high reflection region is located from the bottom to a place between one fourth and one half of the height of the neutron reflector from the bottom end thereof.Type: ApplicationFiled: February 18, 2005Publication date: October 6, 2005Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsugio Yokoyama, Mitsuaki Yamaoka, Yasuyuki Moriki, Ryoma Kato, Yasushi Tsuboi, Atsuko Matsuda
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Publication number: 20030185334Abstract: A core inlet structure for coolant disposed in a reactor pressure vessel of a boiling water reactor includes a core support plate provided with a plurality of fuel support holes, a reinforcing beam supporting the core support plate, a plurality of control rod guide pipes standing perpendicularly and having upper end portions fitted to the fuel support holes, and a fuel support member inserted into upper end portions of the control rod guide pipes and supported by the core support plate so as to support lower end portions of fuel assemblies. An inlet orifice is formed to the fuel support member so as to adjust flow rate of a coolant flowing in the fuel assemblies, and a vortex control structure is provided for the inlet orifice or provided at a portion on a coolant upstream side of the inlet orifice.Type: ApplicationFiled: April 1, 2003Publication date: October 2, 2003Applicant: Kabushiki Kaisha ToshibaInventors: Toshihiro Fujii, Shiho Fujita, Akira Mototani, Hideo Komita, Miyuki Akiba, Tadashi Narabayashi, Masaru Ukai, Shinichi Morooka, Tetsuzo Yamamoto, Ryoma Kato
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Publication number: 20030026381Abstract: A fuel inlet mechanism to introduce a coolant into a fuel assembly configured to be charged in a light water nuclear reactor, includes, a filter catching a foreign substance included in the coolant on an upstream side of the fuel assembly, the filter having a plurality of through holes to pass the coolant, and the through holes having an inlet portion, an outlet portion and at least one bent portion to a degree by which the outlet portion cannot be seen through from the inlet portion by a straight line.Type: ApplicationFiled: July 15, 2002Publication date: February 6, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Masaru Ukai, Kosaku Tsumita, Ryoma Kato, Kenjiro Fukamichi, Yuji Yamada, Makoto Sato, Tadaaki Shimazu, Tomoharu Tanabe, Hirotoshi Matsumura, Keiji Matsunaga, Ken Okuda