Patents by Inventor Joon-hyung Choi
Joon-hyung Choi 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: 20240125265Abstract: Disclosed herein is an exhaust apparatus for an agricultural work vehicle. The exhaust apparatus for an agricultural work vehicle includes: a muffler configured to reduce the noise that is generated in the process in which the exhaust gas generated in the engine of an agricultural work vehicle is discharged out of the agricultural work vehicle; an intake part coupled to each of the engine and the muffler in order to transfer the exhaust gas, generated in the engine, to the muffler; an exhaust part coupled to the muffler in order to discharge the exhaust gas, having passed through the muffler, out of the agricultural work vehicle; and a vibration reduction part coupled to each of the intake part and the muffler in order to reduce the vibration of the muffler.Type: ApplicationFiled: October 9, 2023Publication date: April 18, 2024Inventors: Jong Jae CHOI, Han Yeol YU, Maengchan JEONG, Joon Hyung KIM
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Patent number: 11946702Abstract: A nuclear reactor includes a heat exchanger that transfers thermal energy from a primary reactor coolant to a secondary coolant. The heat exchanger is formed with a hot flow channel, a cold flow channel, and a porous layer between the hot flow channel and the cold flow channel. The porous layer may be thermally insulative to reduce the efficiency of thermal energy transfer from the hot flow channel to the cold flow channel. The porous layer may have a control gas passed therethrough that can be tailored to control the thermal energy transfer through the porous layer. The control gas can be tested for leakage within the heat exchanger. The control gas may also be used to sequester fission or activation products.Type: GrantFiled: March 23, 2021Date of Patent: April 2, 2024Assignee: TERRAPOWER, LLCInventors: Joon Hyung Choi, Daniel Eichel, Mei He, Pavel Hejzlar, Mathieu G. Martin, Samuel J. Miller, James M. Vollmer
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Patent number: 11930670Abstract: A display device comprises a substrate; a driving transistor including a first active layer and a switching transistor including a second active layer, the first active layer and the second active layer being disposed on the substrate; a first gate insulating layer disposed on the first active layer of the driving transistor and the second active layer of the switching transistor; first and second gate electrodes disposed on the first gate insulating layer to overlap the first active layer of the driving transistor and the second active layer of the switching transistor, respectively; a first interlayer insulating layer disposed on the first gate electrode and the second gate electrode; and a second interlayer insulating layer disposed on the first interlayer insulating layer to overlap the first active layer without overlapping the second active layer in a plan view.Type: GrantFiled: May 6, 2021Date of Patent: March 12, 2024Assignees: Samsung Display Co., Ltd., Industry-University Cooperation Foundation Hanyang University ERICA CampusInventors: Sang Woo Sohn, Saeroonter Oh, Joon Seok Park, Young Joon Choi, Su Hyun Kim, Jun Hyung Lim
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Publication number: 20220310278Abstract: A nuclear reactor includes a heat exchanger that transfers thermal energy from a primary reactor coolant to a secondary coolant. The heat exchanger is formed with a hot flow channel, a cold flow channel, and a porous layer between the hot flow channel and the cold flow channel. The porous layer may be thermally insulative to reduce the efficiency of thermal energy transfer from the hot flow channel to the cold flow channel. The porous layer may have a control gas passed therethrough that can be tailored to control the thermal energy transfer through the porous layer. The control gas can be tested for leakage within the heat exchanger. The control gas may also be used to sequester fission or activation products.Type: ApplicationFiled: March 23, 2021Publication date: September 29, 2022Inventors: Joon Hyung Choi, Daniel Eichel, Mei He, Pavel Hejzlar, Mathieu G. Martin, Samuel J. Miller, James M. Vollmer
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Publication number: 20200027583Abstract: Annular metal fuel and fuel rods are described that have improved performance over uranium oxide fuel rods. The annular metal fuel can be made out of porous metal nuclear fuel and will generate more power and operate at a much lower temperature than uranium oxide fuel. The annular metal fuel rods may be used in traveling wave reactors and other fast reactors. Pressurized water reactors may also be retrofit with annular metal fuel rods to improve reactor performance.Type: ApplicationFiled: December 21, 2018Publication date: January 23, 2020Applicant: TerraPower, LLCInventors: Joon Hyung Choi, Micah J. Hackett, Pavel Hejzlar, Ryan N. Latta, James M. Vollmer
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Patent number: 10062458Abstract: A method of providing an end-capped tubular ceramic composite for containing nuclear fuel (34) in a nuclear reactor involves the steps of providing a tubular ceramic composite (40), providing at least one end plug (14, 46, 48), applying (42) the at least one end plug material to the ends of the tubular ceramic composite, applying electrodes to the end plug and tubular ceramic composite and applying current in a plasma sintering means (10, 50) to provide a hermetically sealed tube (52). The invention also provides a sealed tube made by this method.Type: GrantFiled: August 1, 2016Date of Patent: August 28, 2018Assignee: Westinghouse Electric Company LLCInventors: Peng Xu, Edward J. Lahoda, Lars Hallstadius, Joon Hyung Choi, Shinichi Higuichi, Fumihisa Kano
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Publication number: 20160358673Abstract: A method of providing an end-capped tubular ceramic composite for containing nuclear fuel (34) in a nuclear reactor involves the steps of providing a tubular ceramic composite (40), providing at least one end plug (14, 46, 48), applying (42) the at least one end plug material to the ends of the tubular ceramic composite, applying electrodes to the end plug and tubular ceramic composite and applying current in a plasma sintering means (10, 50) to provide a hermetically sealed tube (52). The invention also provides a sealed tube made by this method.Type: ApplicationFiled: August 1, 2016Publication date: December 8, 2016Applicants: WESTINGHOUSE ELECTRIC COMPANY LLC, KABUSHIKI KAISHA TOSHIBAInventors: PENG XU, EDWARD J. LAHODA, LARS HALLSTADIUS, JOON HYUNG CHOI, SHINICHI HIGUICHI, FUMIHISA KANO
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Patent number: 9455053Abstract: A method of providing an end-capped tubular ceramic composite for containing nuclear fuel (34) in a nuclear reactor involves the steps of providing a tubular ceramic composite (40), providing at least one end plug (14, 46, 48), applying (42) the at least one end plug material to the ends of the tubular ceramic composite, applying electrodes to the end plug and tubular ceramic composite and applying current in a plasma sintering means (10, 50) to provide a hermetically sealed tube (52). The invention also provides a sealed tube made by this method.Type: GrantFiled: September 16, 2013Date of Patent: September 27, 2016Assignees: Westinghouse Electric Company LLC, KABUSHIKI KAISHA TOSHIBA AKA Toshiba CorporationInventors: Peng Xu, Edward J. Lahoda, Lars Hallstadius, Joon Hyung Choi, Shinichi Higuchi, Fumihisa Kano
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Publication number: 20150078505Abstract: A method of providing an end-capped tubular ceramic composite for containing nuclear fuel (34) in a nuclear reactor involves the steps of providing a tubular ceramic composite (40), providing at least one end plug (14, 46, 48), applying (42) the at least one end plug material to the ends of the tubular ceramic composite, applying electrodes to the end plug and tubular ceramic composite and applying current in a plasma sintering means (10, 50) to provide a hermetically sealed tube (52). The invention also provides a sealed tube made by this method.Type: ApplicationFiled: September 16, 2013Publication date: March 19, 2015Applicants: Kabushiki Kaisha /Toshiba, aka Toshiba Corporation, Westinghouse Electric Company LLCInventors: PENG XU, Edward J. Lahoda, Lars Hallstadius, Joon Hyung Choi, Shinichi Higuchi, Fumisha Kano
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Patent number: 8229055Abstract: The present invention relates to a top nozzle for a nuclear fuel assembly that has a two-stage elastic section such that a pushing force against the axial movement of the nuclear fuel assembly under normal conditions is optimized and at the same time a suppressing force against a drastic uplifting force of the nuclear fuel assembly under transient conditions is strengthened, and that lowers the elastic coefficients of the springs operating under normal conditions more than those of existing coil springs, thereby providing an optimal pushing force against the nuclear fuel assembly.Type: GrantFiled: January 8, 2008Date of Patent: July 24, 2012Assignee: Korea Nuclear Fuel Co., Ltd.Inventors: Joon-kyoo Park, Joon-hyung Choi, Kyu-Tae Kim, Jung-min Suh, Shin-ho Lee, Nam-gyu Park, Kyong-bo Eom, Jin-sun Kim, Jin-seok Lee, Seong-ki Lee
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Patent number: 7835484Abstract: The present invention relates to an anti-fretting wear spacer grid having a plurality of canoe-shaped springs formed thereon, wherein each of the canoe-shaped springs includes: a fuel rod-contacting part having a flat surface having a predetermined longitudinal length so as to have linear contact with the fuel rod; a curved face-connecting part formed on the upper and lower portions of the fuel rod-contacting part; a leg-connecting part formed on the end portion of the curved face-connecting part; and legs each being formed of a plate shape having a predetermined length and connecting the both sides of the leg-connecting part with one unit grid cell surface.Type: GrantFiled: January 9, 2008Date of Patent: November 16, 2010Assignee: Korea Nuclear Fuel Co., LtdInventors: Kyong-bo Eom, Kyu-Tae Kim, Jung-min Suh, Shin-ho Lee, Nam-Gyu Park, Joon-kyoo Park, Jin-sun Kim, Il-kyu Kim, Seong-ki Lee, Joon-hyung Choi
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Publication number: 20100166134Abstract: The present invention relates to a top nozzle having on-off type of hold-down springs for a nuclear fuel assembly that has a two-stage elastic section such that a pushing force against the axial movement of the nuclear fuel assembly under normal conditions is optimized and at the same time a suppressing force against a drastic uplifting force of the nuclear fuel assembly under transient conditions is strengthened, and that lowers the elastic coefficients of the springs operating under normal conditions more than those of existing coil springs, thereby providing an optimal pushing force against the nuclear fuel assembly.Type: ApplicationFiled: January 8, 2008Publication date: July 1, 2010Applicant: Korea Nuclear Fuel Co., Ltd.Inventors: Joon-kyoo PARK, Joon-hyung Choi, Kyu-Tae Kim, Jung-min Suh, Shin-ho Lee, Nam-gyu Park, Kyong-bo Eom, Jin-sun Kim, Jin-seok Lee, Seong-ki Lee
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Publication number: 20100098208Abstract: The present invention relates to an anti-fretting wear spacer grid having a plurality of canoe-shaped springs formed thereon, wherein each of the canoe-shaped springs includes: a fuel rod-contacting part having a flat surface having a predetermined longitudinal length so as to have linear contact with the fuel rod; a curved face-connecting part formed on the upper and lower portions of the fuel rod-contacting part; a leg-connecting part formed on the end portion of the curved face-connecting part; and legs each being formed of a plate shape having a predetermined length and connecting the both sides of the leg-connecting part with one unit grid cell surface.Type: ApplicationFiled: January 9, 2008Publication date: April 22, 2010Applicant: Korea Nuclear Fuel Co., Ltd.Inventors: Kyong-bo EOM, Kyu-Tae Kim, Jung-min Suh, Shin-ho Lee, Nam-gyu Park, Joon-kyoo Park, Jin-sun Kim, II-kyu Kim, Seong-ki Lee, Joon-hyung Choi