Patents by Inventor Tomoyuki Yokota
Tomoyuki Yokota 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: 20210260689Abstract: Disclosed is a clad steel plate with further improved low temperature toughness along with excellent HIC resistance while ensuring a tensile strength of 535 MPa or more. A clad steel plate includes: a base steel; and a clad metal made of a corrosion resistant alloy bonded to one surface of the base steel, in which the base steel has: a chemical composition with appropriately controlled values of ACR and PHIC; and a steel microstructure in which bainite is present in an area fraction of 94% or more at a ½ thickness position in a thickness direction of the base steel, and with an average crystal grain size of 25 ?m or less, and shear strength at a bonded interface between the base steel and the cladding metal is 300 MPa or more.Type: ApplicationFiled: June 25, 2019Publication date: August 26, 2021Applicant: JFE STEEL CORPORATIONInventors: Ryosuke SAKAI, Yota KURONUMA, Junji SHIMAMURA, Tomoyuki YOKOTA
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Publication number: 20210175399Abstract: A package for installing a semiconductor element includes: a lead frame; a resin frame disposed on the lead frame and including a housing portion formed by an opening that widens with the distance in the upward direction from the lead frame; and a metal reflector that fits in the housing portion and includes an opening portion corresponding to the housing portion of the resin frame. The opening area of the opening portion of the metal reflector increases with the distance in the upward direction from the lead frame, and the metal reflector includes a flange around the side of the metal reflector in which the opening area is large. The flange is placed on the top surface of the resin frame.Type: ApplicationFiled: February 18, 2021Publication date: June 10, 2021Inventors: Ikuo NIWA, Yasutaka HASE, Shunsuke AKAI, Hayato TAKAGI, Tomoyuki YOKOTA, Hiroshi SANADA
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Publication number: 20210054471Abstract: A method for producing a steel material for line pipes which has a tensile strength of 570 MPa or more, a compressive strength of 440 MPa or more, and a thickness of 30 mm or more, the method including heating a steel having a specific composition to a temperature of 1000° C. to 1200° C.; performing hot rolling such that a cumulative rolling reduction ratio in a non-recrystallization temperature range is 60% or more, a cumulative rolling reduction ratio in a temperature range of (a rolling finish temperature +20° C.) or less is 50% or more, and a rolling finish temperature is the Ar3 transformation point or more and 790° C. or less; and subsequently performing accelerated cooling from a cooling start temperature of the Ar3 transformation point or more, at a cooling rate of 10° C./s or more, until the temperature of a surface of a steel plate reaches 300° C. to 500° C.Type: ApplicationFiled: January 22, 2019Publication date: February 25, 2021Applicant: JFE Steel CorporationInventors: Kyono Yasuda, Tomoyuki Yokota, Akihiko Tanizawa, Ryuji Muraoka, Kazukuni Hase
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Publication number: 20210032732Abstract: A method for producing a steel material for line pipes including heating a steel having a specific composition to a temperature of 1000° C. to 1200° C.; performing hot rolling such that a cumulative rolling reduction ratio in a non-recrystallization temperature range is 60% or more, a cumulative rolling reduction ratio in a temperature range of (a rolling finish temperature +20° C.) or less is 50% or more, and a rolling finish temperature is the Ar3 transformation point or more and 790° C. or less; subsequently performing accelerated cooling from a temperature of the Ar3 transformation point or more, at a cooling rate of 10° C./s or more, to a cooling stop temperature of 200° C. to 450° C.; and then performing reheating such that the temperature of a surface of the steel plate is 350° C. to 550° C. and the temperature of the center of the steel plate is less than 550° C.Type: ApplicationFiled: January 22, 2019Publication date: February 4, 2021Applicant: JFE Steel CorporationInventors: Kyono Yasuda, Tomoyuki Yokota, Akihiko Tanizawa, Ryuji Muraoka, Kazukuni Hase
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Publication number: 20210025023Abstract: Disclosed is a duplex stainless clad steel plate in which a duplex stainless steel plate as a cladding metal is bonded or joined to one or both surfaces of a base steel plate, in which the base steel plate comprises a predetermined chemical composition such that Nb/N is 3.0 or more and Ceq is 0.35 to 0.45, and the duplex stainless steel plate comprises: a predetermined chemical composition such that PI is 34.0 to 43.0; and a microstructure containing a ferrite phase in an area fraction of 35% to 65%, and in the microstructure, an amount of precipitated Cr is 2.00% or less and an amount of precipitated Mo is 0.50% or less.Type: ApplicationFiled: March 28, 2019Publication date: January 28, 2021Applicant: JFE STEEL CORPORATIONInventors: Yota KURONUMA, Hirofumi OHTSUBO, Tomoyuki YOKOTA
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Publication number: 20210025044Abstract: Disclosed is a duplex stainless clad steel plate in which a duplex stainless steel plate as a cladding metal is bonded or joined to one or both surfaces of a base steel plate, in which the base steel plate comprises a predetermined chemical composition such that Nb/N is 3.0 or more and Ceq is 0.35 to 0.45, and the duplex stainless steel plate comprises: a predetermined chemical composition such that PI is 33.0 to 38.0; and a microstructure containing a ferrite phase in an area fraction of 35% to 65%, and in the microstructure, an amount of precipitated Cr is 1.00% or less and an amount of precipitated Mo is 0.50% or less.Type: ApplicationFiled: March 28, 2019Publication date: January 28, 2021Applicant: JFE STEEL CORPORATIONInventors: Yota KURONUMA, Hirofumi OHTSUBO, Tomoyuki YOKOTA
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Patent number: 10302506Abstract: In order to provide a resin composition for temperature sensors that includes a polymer and exhibits high flexibility, higher sensitivity and high cyclic repeatability, a temperature sensor element, a temperature sensor, and a method for producing a temperature sensor, the resin composition (10) for temperature sensors is configured to have conductive particles (2) dispersed in an acrylic polymer (1) obtained by copolymerizing a first acrylic monomer represented by a general formula CH2CHCOOX1 and a second acrylic monomer represented by a general formula CH2CHCOOX2.Type: GrantFiled: February 5, 2015Date of Patent: May 28, 2019Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Tsuyoshi Sekitani, Yuki Terakawa, Tomoyuki Yokota, Takao Someya, Jonathan T. Reeder
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Patent number: 9950743Abstract: In a vehicle subframe, one of a pair of cross members includes a lower member open to a lower side of a vehicle, with an upper wall thereof having an upper wall recess depressed downward, an upper member arranged so as to cover the upper wall recess from above the vehicle and connected to the lower member, an inside space defined by the lower member and the upper member in cooperation, and a holding member connected to the lower member and the upper member in a mode in which the holding member is sandwiched between the lower member and the upper member, while penetrating the inside space in a longitudinal direction, to hold a component to be mounted.Type: GrantFiled: May 25, 2016Date of Patent: April 24, 2018Assignee: F-TECH INC.Inventor: Tomoyuki Yokota
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Patent number: 9833856Abstract: A circumferential welded joint of a line pipe is formed by butting against each other end portions of steel pipes having a yield strength according to 5L Specification of API Standards not smaller than 555 N/mm2 and welding the butted portions in a circumferential direction. A joint strength ratio ?match=(TS-w/TS-b)·(YS-w/YS-b) represented by a product of a ratio between a tensile strength TS-w of a weld metal and a tensile strength TS-b of a base material and a ratio between a yield strength YS-w of the weld metal and a yield strength YS-b of the base material, and a critical equivalent plastic strain ?p-cri [%] for ductile crack generation in a base material heat affected zone satisfy Equation (1), and the yield strengths YS-w, YS-b of the weld metal and base material satisfy Equation (2). ?match>4.85?p-cri?0.31??(1) YS-w/YS-b?1.Type: GrantFiled: November 19, 2013Date of Patent: December 5, 2017Assignee: JFE STEEL CORPORATIONInventors: Takahiro Sakimoto, Satoshi Igi, Tomoyuki Yokota
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Patent number: 9828029Abstract: A pair of side members extends in a longitudinal direction of a vehicle in a width direction and have a plurality of coupling portions coupling with a vehicle body member of a vehicle. A pair of cross members extends in the width direction to face each other in the longitudinal direction and couple the pair of side members. A pair of coupling members is provided in the side members to couple a corresponding one of the plurality of coupling portions with the vehicle body member. A pair of support members is provided in the cross members to support correspondingly a pair of suspension arms provided in the vehicle and facing each other in the width direction. The lower parts of the support members are welded to upper walls of the coupling members and vertical walls of one of the cross members straddling the upper walls and the vertical walls.Type: GrantFiled: January 27, 2015Date of Patent: November 28, 2017Assignees: F-TECH INC., HONDA MOTOR CO., LTD.Inventors: Toru Kawai, Tomoyuki Yokota, Toshiya Takahashi, Kazumi Mikami
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Publication number: 20170176262Abstract: In order to provide a resin composition for temperature sensors that includes a polymer and exhibits high flexibility, higher sensitivity and high cyclic repeatability, a temperature sensor element, a temperature sensor, and a method for producing a temperature sensor, the resin composition (10) for temperature sensors is configured to have conductive particles (2) dispersed in an acrylic polymer (1) obtained by copolymerizing a first acrylic monomer represented by a general formula CH2CHCOOX1 and a second acrylic monomer represented by a general formula CH2CHCOOX2.Type: ApplicationFiled: February 5, 2015Publication date: June 22, 2017Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Tsuyoshi SEKITANI, Yuki TERAKAWA, Tomoyuki YOKOTA, Takao SOMEYA, Jonathan T. REEDER
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Publication number: 20160347368Abstract: A pair of side members extends in a longitudinal direction of a vehicle in a width direction and have a plurality of coupling portions coupling with a vehicle body member of a vehicle. A pair of cross members extends in the width direction to face each other in the longitudinal direction and couple the pair of side members. A pair of coupling members is provided in the side members to couple a corresponding one of the plurality of coupling portions with the vehicle body member. A pair of support members is provided in the cross members to support correspondingly a pair of suspension arms provided in the vehicle and facing each other in the width direction. The lower parts of the support members are welded to upper walls of the coupling members and vertical walls of one of the cross members straddling the upper walls and the vertical walls.Type: ApplicationFiled: January 27, 2015Publication date: December 1, 2016Applicants: F-TECH INC., HONDA MOTOR CO., LTD.Inventors: Toru Kawai, Tomoyuki Yokota, Toshiya Takahashi, Kazumi Mikami
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Publication number: 20160347367Abstract: In a vehicle subframe, one of a pair of cross members includes a lower member open to a lower side of a vehicle, with an upper wall thereof having an upper wall recess depressed downward, an upper member arranged so as to cover the upper wall recess from above the vehicle and connected to the lower member, an inside space defined by the lower member and the upper member in cooperation, and a holding member connected to the lower member and the upper member in a mode in which the holding member is sandwiched between the lower member and the upper member, while penetrating the inside space in a longitudinal direction, to hold a component to be mounted.Type: ApplicationFiled: May 25, 2016Publication date: December 1, 2016Applicant: F-TECH INC.Inventor: Tomoyuki Yokota
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Patent number: 9261135Abstract: A thrust race of a thrust roller bearing has a race portion and a cylindrical portion extending from the race portion in an axial direction. At a plurality of locations along a circumferential direction on the cylindrical portion, cutout portions are formed such that each of the cutout portions is recessed in the axial direction from a distal edge of the cylindrical portion toward the race portion. A protrusion is provided at a portion closer to the race portion from a bottom edge of each of the cutout portions such that the protrusion protrudes in a radial direction from the cylindrical portion toward a side away from the race portion. The protrusion serves as a race-retaining locking portion to prevent a race from moving out from a mating member on which the race is mounted.Type: GrantFiled: February 20, 2014Date of Patent: February 16, 2016Assignee: NSK LTD.Inventors: Hiroyuki Hara, Kazuhiko Kanou, Tomoyuki Yokota
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Publication number: 20150328708Abstract: A circumferential welded joint of a line pipe is formed by butting against each other end portions of steel pipes having a yield strength according to 5L Specification of API Standards not smaller than 555 N/mm2 and welding the butted portions in a circumferential direction. A joint strength ratio ?match=(TS-w/TS-b)·(YS-w/YS-b) represented by a product of a ratio between a tensile strength TS-w of a weld metal and a tensile strength TS-b of a base material and a ratio between a yield strength YS-w of the weld metal and a yield strength YS-b of the base material, and a critical equivalent plastic strain ?p-cri [%] for ductile crack generation in a base material heat affected zone satisfy Equation (1), and the yield strengths YS-w, YS-b of the weld metal and base material satisfy Equation (2). ?match>4.85?p-cri?0.31??(1) YS-w/YS-b?1.Type: ApplicationFiled: November 19, 2013Publication date: November 19, 2015Applicant: JFE STEEL CORPORATIONInventors: Takahiro SAKIMOTO, Satoshi IGI, Tomoyuki YOKOTA
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Patent number: 8961029Abstract: Construction of a roller thrust bearing is achieved wherein it is possible to keep a thrust race from coming apart from a cage without wear or cracking occurring in a cage element and without impact occurring between the thrust race and cage even when used in an application wherein a rotating section rotates at high speed, or when used in an application wherein relative displacement between members of a rotating section is large. The thickness of metal plate of a first cage element 35 is preferably ? the thickness of metal plate of a second cage element 36 or less. Alternatively, the thickness of metal plate of a second cage element 56 is preferably ? the thickness of metal plate of a first cage element 55 or less.Type: GrantFiled: February 2, 2012Date of Patent: February 24, 2015Assignee: NSK Ltd.Inventors: Ryosuke Yamada, Tomoyuki Yokota
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Publication number: 20140169721Abstract: A thrust race of a thrust roller bearing has a race portion and a cylindrical portion extending from the race portion in an axial direction. At a plurality of locations along a circumferential direction on the cylindrical portion, cutout portions are formed such that each of the cutout portions is recessed in the axial direction from a distal edge of the cylindrical portion toward the race portion. A protrusion is provided at a portion closer to the race portion from a bottom edge of each of the cutout portions such that the protrusion protrudes in a radial direction from the cylindrical portion toward a side away from the race portion. The protrusion serves as a race-retaining locking portion to prevent a race from moving out from a mating member on which the race is mounted.Type: ApplicationFiled: February 20, 2014Publication date: June 19, 2014Applicant: NSK LTD.Inventors: Hiroyuki HARA, Kazuhiko KANOU, Tomoyuki YOKOTA
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Publication number: 20130301974Abstract: Construction of a roller thrust bearing is achieved wherein it is possible to keep a thrust race from coming apart from a cage without wear or cracking occurring in a cage element and without impact occurring between the thrust race and cage even when used in an application wherein a rotating section rotates at high speed, or when used in an application wherein relative displacement between members of a rotating section is large. The thickness of metal plate of a first cage element 35 is preferably ? the thickness of metal plate of a second cage element 36 or less. Alternatively, the thickness of metal plate of a second cage element 56 is preferably ? the thickness of metal plate of a first cage element 55 or less.Type: ApplicationFiled: February 2, 2012Publication date: November 14, 2013Inventors: Ryosuke Yamada, Tomoyuki Yokota
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Publication number: 20110158573Abstract: A thrust race of a thrust roller bearing has a race portion and a cylindrical portion extending from the race portion in an axial direction. At a plurality of locations along a circumferential direction on the cylindrical portion, cutout portions are formed such that each of the cutout portions is recessed in the axial direction from a distal edge of the cylindrical portion toward the race portion. A protrusion is provided at a portion closer to the race portion from a bottom edge of each of the cutout portions such that the protrusion protrudes in a radial direction from the cylindrical portion toward a side away from the race portion. The protrusion serves as a race-retaining locking portion to prevent a race from moving out from a mating member on which the race is mounted.Type: ApplicationFiled: February 24, 2010Publication date: June 30, 2011Applicant: NSK LTD.Inventors: Hiroyuki Hara, Kazuhiko Kanou, Tomoyuki Yokota, Tetsuya Takahashi
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Patent number: 7681753Abstract: A pressure container 1 composed of a reinforcing layer 2 and a liner layer 3, with a hydrogen charging pressure of 30 MPa or higher; and a hydrogen absorbing material and a carrier for holding said hydrogen absorbing material (hydrogen absorbing material portion 4) contained in the pressure container 1 are included, and a volume fraction X of the hydrogen absorbing material with ?m?100 kg/m3 with respect to an internal volume of the pressure container 1 is 5(%)?X?20(%), where ?m denotes a maximum hydrogen absorption amount per unit volume of the hydrogen absorbing material (kg/m3); X=100 ·Vm/Vi (%); Vi is an internal volume of the pressure container (L); and Vm is a volume of the hydrogen absorbing material in the pressure container (L).Type: GrantFiled: January 31, 2003Date of Patent: March 23, 2010Assignees: JFE Steel Corporation, National Institute of Advanced Industrial Science and Technology, JFE Container Co., LtdInventors: Tomoyuki Yokota, Kenjiro Hamada, Hidekazu Tsuruta, Nobuhiro Kuriyama, Hiroyuki Takeshita, Nobuhiko Takeichi, Toshio Takano