Patents by Inventor Kenji Umetsu
Kenji Umetsu 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: 10880958Abstract: A first coil 110 and a second coil 120 are faced each other across a conductor plate S so that the first coil (110) and the second coil (120) become substantially the same in position in a Y-axis direction. The conductor plate S is inductively heated by applying alternating currents at a frequency at which a depth of penetration of the current becomes equal to or less than half a plate thickness of the conductor plate S to the first coil (110) and the second coil (120) in opposite directions.Type: GrantFiled: March 30, 2016Date of Patent: December 29, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Kenji Umetsu, Tsutomu Ueki
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Patent number: 10327287Abstract: The transverse flux induction heating device is allows an alternating magnetic field to intersect the sheet face of a conductive sheet which is conveyed in one direction, thereby inductively heating the conductive sheet. The transverse flux induction heating device includes a heating coil disposed such that a coil face faces the sheet face of the conductive sheet; a core around which the heating coil is coiled; a shielding plate formed of a conductor and disposed between the core and a side end portion in the direction perpendicular to a conveyance direction of the conductive sheet; and a non-conductive 10 soft magnetic material which is attached to the shielding plate, wherein the shielding plate is interposed between the core and the non-conductive soft magnetic material.Type: GrantFiled: August 22, 2018Date of Patent: June 18, 2019Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenji Umetsu, Tsutomu Ueki, Yasuhiro Mayumi, Toshiya Takechi
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Patent number: 10292210Abstract: The transverse flux induction heating device is allows an alternating magnetic field to intersect the sheet face of a conductive sheet which is conveyed in one direction, thereby inductively heating the conductive sheet. The transverse flux induction heating device includes a heating coil disposed such that a coil face faces the sheet face of the conductive sheet; a core around which the heating coil is coiled; a shielding plate formed of a conductor and disposed between the core and a side end portion in the direction perpendicular to a conveyance direction of the conductive sheet; and a non-conductive soft magnetic material which is attached to the shielding plate, wherein the shielding plate is interposed between the core and the non-conductive soft magnetic material.Type: GrantFiled: February 18, 2011Date of Patent: May 14, 2019Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenji Umetsu, Tsutomu Ueki, Yasuhiro Mayumi, Toshiya Takechi
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Publication number: 20190029080Abstract: A first coil 110 and a second coil 120 are faced each other across a conductor plate S so that the first coil (110) and the second coil (120) become substantially the same in position in a Y-axis direction. The conductor plate S is inductively heated by applying alternating currents at a frequency at which a depth of penetration of the current becomes equal to or less than half a plate thickness of the conductor plate S to the first coil (110) and the second coil (120) in opposite directions.Type: ApplicationFiled: March 30, 2016Publication date: January 24, 2019Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenji UMETSU, Tsutomu UEKI
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Publication number: 20180359817Abstract: The transverse flux induction heating device is allows an alternating magnetic field to intersect the sheet face of a conductive sheet which is conveyed in one direction, thereby inductively heating the conductive sheet. The transverse flux induction heating device includes a heating coil disposed such that a coil face faces the sheet face of the conductive sheet; a core around which the heating coil is coiled; a shielding plate formed of a conductor and disposed between the core and a side end portion in the direction perpendicular to a conveyance direction of the conductive sheet; and a non-conductive 10 soft magnetic material which is attached to the shielding plate, wherein the shielding plate is interposed between the core and the non-conductive soft magnetic material.Type: ApplicationFiled: August 22, 2018Publication date: December 13, 2018Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenji UMETSU, Tsutomu UEKI, Yasuhiro MAYUMI, Toshiya TAKECHI
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Patent number: 10085306Abstract: The transverse flux induction heating device allows an alternating magnetic field to intersect the sheet face of a conductive sheet which is conveyed in one direction, thereby inductively heating the conductive sheet. The transverse flux induction heating device includes a heating coil disposed such that a coil face faces the sheet face of the conductive sheet; a core around which the heating coil is coiled; and a shielding plate formed of a conductor and disposed between the core and a side end portion in a direction perpendicular to the conveyance direction of the conductive sheet, wherein the shielding plate has a protruded portion, and the side surface of the protruded portion represents a closed loop when viewed from a direction perpendicular to the coil face.Type: GrantFiled: January 11, 2017Date of Patent: September 25, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenji Umetsu, Tsutomu Ueki, Yasuhiro Mayumi, Toshiya Takechi
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Patent number: 9942949Abstract: A control unit of an induction heating unit controls AC power output to a heating coil of a transverse type induction heating unit that allows an alternating magnetic field to intersect a sheet surface of a conductive sheet that is being conveyed to inductively heat the conductive sheet. The control unit includes: a magnetic energy recovery switch that outputs AC power to the heating coil; a frequency setting unit that sets an output frequency in response to at least one of the relative permeability, resistivity, and sheet thickness of the conductive sheet; and a gate control unit that controls a switching operation of the magnetic energy recovery switch on the basis of the output frequency set by the frequency setting unit.Type: GrantFiled: December 14, 2015Date of Patent: April 10, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuhiko Fukutani, Yasuhiro Mayumi, Toshiya Takechi, Kenji Umetsu
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Patent number: 9907120Abstract: A control unit of an induction heating unit controls AC power output to a heating coil of a transverse type induction heating unit that allows an alternating magnetic field to intersect a sheet surface of a conductive sheet that is being conveyed to inductively heat the conductive sheet. The control unit includes: a magnetic energy recovery switch that outputs AC power to the heating coil; a frequency setting unit that sets an output frequency in response to at least one of the relative permeability, resistivity, and sheet thickness of the conductive sheet; and a gate control unit that controls a switching operation of the magnetic energy recovery switch on the basis of the output frequency set by the frequency setting unit.Type: GrantFiled: December 14, 2015Date of Patent: February 27, 2018Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuhiko Fukutani, Yasuhiro Mayumi, Toshiya Takechi, Kenji Umetsu
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Patent number: 9784899Abstract: The present invention is characterized in that a light emitting part of LED 1 has a planar and point-symmetrical shape, a light emission angle distribution is a Lambert distribution and a light emission face is a scattering face; a hemispheric mirror 3 forms a reflection face 3a on the interior face, and has an aperture 3b at the center, while the reflection face 3a is disposed so as to oppose to LED 1; a normal line of LED 1 and an optical axis of the hemispheric mirror 3 are coincident with each other; an interval between LED 1 and the hemispheric mirror 3 is equal to or smaller than a curvature radius of the hemispheric mirror 3; a dimension of the aperture 3b of the hemispheric mirror 3 is substantially equal to a radiation dimension; and sin (tan?1 d LED/2t)?NA object is established.Type: GrantFiled: May 5, 2016Date of Patent: October 10, 2017Assignee: U-technology Co., Ltd.Inventors: Shuji Shikano, Kenji Umetsu
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Publication number: 20170127482Abstract: The transverse flux induction heating device allows an alternating magnetic field to intersect the sheet face of a conductive sheet which is conveyed in one direction, thereby inductively heating the conductive sheet. The transverse flux induction heating device includes a heating coil disposed such that a coil face faces the sheet face of the conductive sheet; a core around which the heating coil is coiled; and a shielding plate formed of a conductor and disposed between the core and a side end portion in a direction perpendicular to the conveyance direction of the conductive sheet, wherein the shielding plate has a protruded portion, and the side surface of the protruded portion represents a closed loop when viewed from a direction perpendicular to the coil face.Type: ApplicationFiled: January 11, 2017Publication date: May 4, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenji UMETSU, Tsutomu UEKI, Yasuhiro MAYUMI, Toshiya TAKECHI
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Patent number: 9578693Abstract: The transverse flux induction heating device allows an alternating magnetic field to intersect the sheet face of a conductive sheet which is conveyed in one direction, thereby inductively heating the conductive sheet. The transverse flux induction heating device includes a heating coil disposed such that a coil face faces the sheet face of the conductive sheet; a core around which the heating coil is coiled; and a shielding plate formed of a conductor and disposed between the core and a side end portion in a direction perpendicular to the conveyance direction of the conductive sheet, wherein the shielding plate has a protruded portion, and the side surface of the protruded portion represents a closed loop when viewed from a direction perpendicular to the coil face.Type: GrantFiled: February 18, 2011Date of Patent: February 21, 2017Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenji Umetsu, Tsutomu Ueki, Yasuhiro Mayumi, Toshiya Takechi
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Publication number: 20160349434Abstract: The present invention is characterized in that a light emitting part of LED 1 has a planar and point-symmetrical shape, a light emission angle distribution is a Lambert distribution and a light emission face is a scattering face; a hemispheric mirror 3 forms a reflection face 3a on the interior face, and has an aperture 3b at the center, while the reflection face 3a is disposed so as to oppose to LED 1; a normal line of LED 1 and an optical axis of the hemispheric mirror 3 are coincident with each other; an interval between LED 1 and the hemispheric mirror 3 is equal to or smaller than a curvature radius of the hemispheric mirror 3; a dimension of the aperture 3b of the hemispheric mirror 3 is substantially equal to a radiation dimension; and sin (tan?1 d LED/2t)?NA object is established.Type: ApplicationFiled: May 5, 2016Publication date: December 1, 2016Applicant: U-technology Co., Ltd.Inventors: Shuji SHIKANO, Kenji UMETSU
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Publication number: 20160100459Abstract: A control unit of an induction heating unit controls AC power output to a heating coil of a transverse type induction heating unit that allows an alternating magnetic field to intersect a sheet surface of a conductive sheet that is being conveyed to inductively heat the conductive sheet. The control unit includes: a magnetic energy recovery switch that outputs AC power to the heating coil; a frequency setting unit that sets an output frequency in response to at least one of the relative permeability, resistivity, and sheet thickness of the conductive sheet; and a gate control unit that controls a switching operation of the magnetic energy recovery switch on the basis of the output frequency set by the frequency setting unit.Type: ApplicationFiled: December 14, 2015Publication date: April 7, 2016Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuhiko FUKUTANI, Yasuhiro MAYUMI, Toshiya TAKECHI, Kenji UMETSU
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Publication number: 20160100458Abstract: A control unit of an induction heating unit controls AC power output to a heating coil of a transverse type induction heating unit that allows an alternating magnetic field to intersect a sheet surface of a conductive sheet that is being conveyed to inductively heat the conductive sheet. The control unit includes: a magnetic energy recovery switch that outputs AC power to the heating coil; a frequency setting unit that sets an output frequency in response to at least one of the relative permeability, resistivity, and sheet thickness of the conductive sheet; and a gate control unit that controls a switching operation of the magnetic energy recovery switch on the basis of the output frequency set by the frequency setting unit.Type: ApplicationFiled: December 14, 2015Publication date: April 7, 2016Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuhiko FUKUTANI, Yasuhiro MAYUMI, Toshiya TAKECHI, Kenji UMETSU
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Patent number: 9247590Abstract: A control unit of an induction heating unit controls AC power output to a heating coil of a transverse type induction heating unit that allows an alternating magnetic field to intersect a sheet surface of a conductive sheet that is being conveyed to inductively heat the conductive sheet. The control unit includes: a magnetic energy recovery switch that outputs AC power to the heating coil; a frequency setting unit that sets an output frequency in response to at least one of the relative permeability, resistivity, and sheet thickness of the conductive sheet; and a gate control unit that controls a switching operation of the magnetic energy recovery switch on the basis of the output frequency set by the frequency setting unit.Type: GrantFiled: November 22, 2010Date of Patent: January 26, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kazuhiko Fukutani, Yasuhiro Mayumi, Toshiya Takechi, Kenji Umetsu
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Publication number: 20140190655Abstract: A continuous casting apparatus for steel includes: a casting mold for casting a molten steel with a pair of long side walls and a pair of short side walls; a submerged entry nozzle which discharges the molten steel into the casting mold; and an electromagnetic stirring device which is disposed along each external surface of each of the long side walls and stirs an upper portion of the molten steel within the casting mold. A curved portion which is convexly curved toward the electromagnetic stirring device in plan view is formed at least at a position where the curved portion faces the submerged entry nozzle on each of the long side walls, and each of the long side walls including the curved portion has a uniform thickness.Type: ApplicationFiled: November 9, 2011Publication date: July 10, 2014Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Takehiko Toh, Junji Nakashima, Yasuo Maruki, Norimasa Yamasaki, Keiji Tsunenari, Kenji Umetsu
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Patent number: 8420990Abstract: There is provided an induction heating apparatus which continuously heats a steel plate using a solenoid system. The induction heating apparatus (1) includes: at least three heating coils (10A to 10D) disposed along a longitudinal direction of the steel plate to make the steel plate (2) pass through an inside thereof; and inductance adjusters (12A to 12D) disposed on electrical pathways (11) electrically connecting each of the heating coils and a power source applying a voltage to each of the heating coils and capable of generating self-induction and adjusting self-inductance in the self-induction, in which each of the inductance adjusters is disposed to cause a generation of mutual induction at least between the inductance adjusters mutually adjacent to one another.Type: GrantFiled: March 12, 2009Date of Patent: April 16, 2013Assignees: Nippon Steel & Sumitomo Metal Corporation, Fuji Electric Co., Ltd.Inventors: Hiroaki Mochinaga, Kazunari Ishizaki, Shigenobu Koga, Takaharu Kataoka, Kenji Umetsu, Yasuo Matsunaga, Yasuyuki Ikeda
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Patent number: 8418749Abstract: A continuous casting device for steel of the present invention includes a casting mold for casting a molten steel, a submerged entry nozzle, an electromagnetic stirring device, and an electromagnetic brake device. Further, a curved portion which is curved toward the electromagnetic stirring device is formed at least at a position where the curved portion faces the submerged entry nozzle, on each of the long side walls. Moreover, the horizontal distance between a top of the curved portion and the submerged entry nozzle in plan view is equal to or more than 35 mm and less than 50 mm.Type: GrantFiled: November 4, 2009Date of Patent: April 16, 2013Assignee: Nippon Steel & Sumitomo Metal CorporationInventors: Takehiko Toh, Hideaki Yamamura, Kenji Umetsu
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Patent number: 8383978Abstract: This invention provides a steel pipe material weld zone heating method and apparatus for melting and welding the weld zone of a steel pipe material that during continuous induction heating and welding of moving steel pipe material as the material being heated controls temperature distribution and molten steel shape and weld frequency fluctuation with high accuracy and high efficiency, irrespective of the shape of the heated region of material being heated or the material properties of the material being heated, which comprises a first imaging device, a weld zone temperature distribution computation device, a heating control device, and a variable frequency alternating current power supply device.Type: GrantFiled: October 22, 2008Date of Patent: February 26, 2013Assignee: Nippon Steel CorporationInventors: Kazuhiko Fukutani, Kenji Umetsu, Yoshiaki Nakamura, Kazuto Yamamoto, Takashi Miyakawa, Ryuichi Shimada, Tadayuki Kitahara, Takanori Isobe
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Publication number: 20120312805Abstract: The transverse flux induction heating device allows an alternating magnetic field to intersect the sheet face of a conductive sheet which is conveyed in one direction, thereby inductively heating the conductive sheet. The transverse flux induction heating device includes a heating coil disposed such that a coil face faces the sheet face of the conductive sheet; a core around which the heating coil is coiled; and a shielding plate formed of a conductor and disposed between the core and a side end portion in a direction perpendicular to the conveyance direction of the conductive sheet, wherein the shielding plate has a protruded portion, and the side surface of the protruded portion represents a closed loop when viewed from a direction perpendicular to the coil face.Type: ApplicationFiled: February 18, 2011Publication date: December 13, 2012Inventors: Kenji Umetsu, Tsutomu Ueki, Yasuhiro Mayumi, Toshiya Takechi