Patents by Inventor Atsuo KOGA
Atsuo KOGA 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: 12110428Abstract: This adhesively joined structure includes a first member having a metal portion and a film portion disposed on at least a part of a surface of the metal portion; a second member; an adhesive layer for joining the first member and the second member to each other via the film portion. The film portion includes an organic resin phase containing one or more of a urethane group, an epoxy group, and an ester group; an organic compound phase formed of an organic silicon compound; and optionally an inorganic compound phase formed of an inorganic silicon compound. The total volume percentage of the organic compound phase and the inorganic compound phase to the total volume of the film portion is 16 vol % to 84 vol %. The volume percentage of the organic compound phase to the total volume of the film portion is 16 vol % to 84 vol %. The volume percentage of the inorganic compound phase to the total volume of the film portion is limited to 10 vol % or less.Type: GrantFiled: September 27, 2019Date of Patent: October 8, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Masumi Koori, Kohei Ueda, Atsushi Morishita, Atsuo Koga
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Patent number: 12060019Abstract: A vehicle front structure including a left and right pair of front side members, a bumper reinforcement and a power unit. The bumper reinforcement includes a first breakage initiation point at a position at one vehicle width direction side relative to a vehicle width direction center position of the vehicle, and a second breakage initiation point at a position at the other vehicle width direction side. The first breakage initiation point is a region at which bending yield strength is lower than other regions of the bumper reinforcement. The second breakage initiation point is a region with lower bending yield strength than the other regions but higher bending yield strength than the first breakage initiation point. The bumper reinforcement includes a bumper reinforcement main body with a chamber structure and a bracing member inside the bumper reinforcement main body at the vehicle width direction center position of the vehicle.Type: GrantFiled: March 6, 2020Date of Patent: August 13, 2024Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON STEEL CORPORATIONInventors: Naohiro Saito, Junichi Takayanagi, Ryoichi Hayashi, Atsushi Ono, Atsuo Koga
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Patent number: 12030131Abstract: This spot welded joint includes a first steel sheet having tensile strength of 1100 MPa or higher and hard martensitic structure as main structure, a second steel sheet stacked on the first steel sheet, a nugget having diameter D at an interface between the first and second steel sheets and formed between the first and second steel sheets, and a hardness control region occupying, in a cross section of the first steel sheet in sheet thickness direction that passes a nugget center, a region that is the first steel sheet in sheet thickness direction and is from 0.5×D to 1.0×D from the nugget center in sheet surface direction and in which difference between maximum value and minimum value in hardness in the region is 80 HV or less, and the maximum hardness value in the region is lower than the maximum hardness value of the first steel sheet.Type: GrantFiled: May 24, 2019Date of Patent: July 9, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Tasuku Zeniya, Satoshi Hirose, Atsuo Koga, Koichi Hamada, Masanori Yasuyama
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Patent number: 12017704Abstract: A reinforcing steel member for a motor vehicle of the present invention includes a steel sheet, a first resin material disposed on at least a part of a surface of the steel sheet, and a second resin material disposed on at least a part of a surface of the first resin material and having a matrix resin and a reinforcing fiber material contained in the matrix resin, in which in a cross section of the first resin material and the second resin material perpendicular to the surface of the steel sheet, between one end portion of the second resin material and the other end portion of the second resin material, there is a portion having a length of 80 mm or more along a boundary between the second resin material and the first resin material, in the first resin material, a protrusion portion having a length X of 3.Type: GrantFiled: March 16, 2020Date of Patent: June 25, 2024Assignee: NIPPON STEEL CORPORATIONInventor: Atsuo Koga
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Publication number: 20240154208Abstract: This battery unit is a battery unit including a battery pack that houses a battery cell, and a water-cooling medium flow path formed outside a bottom surface of the battery pack, in which the water-cooling medium flow path of the battery pack is made of an Al-based plated steel sheet.Type: ApplicationFiled: February 4, 2022Publication date: May 9, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Kyohei MIYAKE, Atsuo KOGA, Kohei UEDA, Yutaka MIKAZUKI, Katsunari NORITA, Sho MATSUI, Takashi OKE
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Publication number: 20240120595Abstract: This battery unit is a battery unit including a battery pack that houses a battery cell, and a water-cooling medium flow path formed outside a bottom surface of the battery pack, in which the water-cooling medium flow path is made of a Zn-based plated steel sheet, an inorganic film or a resin film is formed as a chemical conversion coating film on a surface of the Zn-based plated steel sheet, and the inorganic film contains a Si-based component or a Zr-based component as a main component.Type: ApplicationFiled: February 7, 2022Publication date: April 11, 2024Applicant: NIPPON STEEL CORPORATIONInventors: Kyohei MIYAKE, Atsuo KOGA, Kohei UEDA, Yutaka MIKAZUKI, Katsunari NORITA, Sho MATSUI, Takashi OKE
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Patent number: 11912341Abstract: In an automobile hood, sufficient panel rigidity and dent resistance are secured while achieving weight reduction. Automobile hood 1 has a panel 2, a reinforcing member 3, and a joint 4 that joins the panel 2 and the reinforcing member 3. The reinforcing member 3 includes a structure formed from a plurality of units 7 having a hexagonal annular shape disposed in a close-packed arrangement. Unit 7 has a floor 11, inclined wall 12 and top plate 13. The floor 11 is adjacent to the panel 2. Top plate 13 and panel 2 are separated from each other. The inclined wall 12 is arranged between the floor 11 and the top plate 13. A hexagonal annular first ridge line 31 of the unit 7 is located between the inclined wall 12 and the floor 11. A length L1 of one side of the first ridge line 31 is 40-75 mm.Type: GrantFiled: December 27, 2019Date of Patent: February 27, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Tohru Yoshida, Koichi Hamada, Takeshi Kawachi, Atsuo Koga, Takuya Oishi
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Patent number: 11904948Abstract: This bonded structure includes a first member having a metal portion and a film portion disposed on at least a part of a surface of the metal portion; a second member; an adhesive layer for joining the first member and the second member to each other via the film portion. The film portion contains a resin and inorganic particles. The inorganic particles are formed of ferrosilicon or non-oxide ceramics containing V. Some of the inorganic particles protrude toward the adhesive layer. The particle size of at least some of the inorganic particles protruding toward the adhesive layer is less than the film thickness of the film portion.Type: GrantFiled: September 27, 2019Date of Patent: February 20, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Atsuo Koga, Masumi Koori, Kohei Ueda
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Patent number: 11884332Abstract: In an automobile hood, sufficient panel rigidity and dent resistance of a panel are secured while achieving weight reduction. An automobile hood having panel, reinforcing member and joint that joins the panel and the reinforcing member such that the reinforcing member includes a structure formed from a plurality of units having hexagonal annular shape disposed in a close-packed arrangement. Floor of the unit has an annular end part. All of annular end part is located between first circle and second circle wherein first circle is inscribed within a first ridge line overlapping with an outer end part of the floor. Second circle is concentric with first circle and has a radius that is 60% of a radius of the first circle. Width of upper face of floor is 2 mm or more over the entire area of the annular end part in the circumferential direction of the annular end part.Type: GrantFiled: December 27, 2019Date of Patent: January 30, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Tohru Yoshida, Koichi Hamada, Takeshi Kawachi, Atsuo Koga, Takuya Oishi
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Patent number: 11787478Abstract: In an automobile inner panel and an automobile panel that includes the automobile inner panel, panel rigidity of the panel is secured while achieving a weight reduction. An automobile inner panel 2 has a plurality of sub-units 10 that each include a flange 11, an inclined wall 12 continuous with the flange 11, and a bottom portion 13 continuous with inclined wall 12 and separated from the flange 11. The bottom portions 13 and 13 of the sub-units 10 and 10 which are adjacent to each other are butted against each other and are directly continuous with each other. A maximum value of a distance D1 between two of the flanges 11 and 11 of two of the sub-units 10 and 10 in which the bottom portions 13 are arranged separated from each other and which are adjacent to each other is 250 mm or less.Type: GrantFiled: December 27, 2019Date of Patent: October 17, 2023Assignee: NIPPON STEEL CORPORATIONInventors: Ryuichi Nishimura, Koichi Hamada, Atsuo Koga, Takeshi Kawachi, Yasunori Sawa, Tohru Yoshida
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Publication number: 20220177657Abstract: The invention has as its object the provision of a metal-fiber reinforced plastic composite able to more reliably prevent occurrence of an electrolytic corrosion action when forming a composite of a metal member and a fiber reinforced plastic layer comprising reinforcing fiber (carbon fiber) and a matrix resin. A metal-fiber reinforced plastic composite 1 according to the present invention comprises a metal member 10, an insulating layer 30 arranged on at least part of a surface of the metal member 10 and comprising a first matrix resin 31 containing nonconductive fiber 32, and a CFRP layer 40 arranged on at least part of a surface of the insulating layer 30 and comprising a second matrix resin 41 containing carbon fiber 42, wherein, when viewing the surface of the metal member 10 from vertically above, the CFRP layer 40 is positioned at the inside of a region where the insulating layer 30 is present and an outer edge of the CFRP layer 40 and an outer edge of the insulating layer 30 are 0.2 mm or more apart.Type: ApplicationFiled: April 16, 2020Publication date: June 9, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Masumi KOORI, Kohei UEDA, Atsuo KOGA, Masaharu IBARAGI, Noriyuki NEGI, Masafumi USUI
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Publication number: 20220144196Abstract: A vehicle front structure including a left and right pair of front side members, a bumper reinforcement and a power unit. The bumper reinforcement includes a first breakage initiation point at a position at one vehicle width direction side relative to a vehicle width direction center position of the vehicle, and a second breakage initiation point at a position at the other vehicle width direction side. The first breakage initiation point is a region at which bending yield strength is lower than other regions of the bumper reinforcement. The second breakage initiation point is a region with lower bending yield strength than the other regions but higher bending yield strength than the first breakage initiation point. The bumper reinforcement includes a bumper reinforcement main body with a chamber structure and a bracing member inside the bumper reinforcement main body at the vehicle width direction center position of the vehicle.Type: ApplicationFiled: March 6, 2020Publication date: May 12, 2022Inventors: Naohiro SAITO, Junichi TAKAYANAGI, Ryoichi HAYASHI, Atsushi ONO, Atsuo KOGA
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Publication number: 20220126926Abstract: In an automobile inner panel and an automobile panel that includes the automobile inner panel, panel rigidity of the panel is secured while achieving a weight reduction. An automobile inner panel 2 has a plurality of sub-units 10 that each include a flange 11, an inclined wall 12 continuous with the flange 11, and a bottom portion 13 continuous with inclined wall 12 and separated from the flange 11. The bottom portions 13 and 13 of the sub-units 10 and 10 which are adjacent to each other are butted against each other and are directly continuous with each other. A maximum value of a distance D1 between two of the flanges 11 and 11 of two of the sub-units 10 and 10 in which the bottom portions 13 are arranged separated from each other and which are adjacent to each other is 250 mm or less.Type: ApplicationFiled: December 27, 2019Publication date: April 28, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Ryuichi NISHIMURA, Koichi HAMADA, Atsuo KOGA, Takeshi KAWACHI, Yasunori SAWA, Tohru YOSHIDA
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Publication number: 20220097773Abstract: In an automobile hood, sufficient panel rigidity and dent resistance are secured while achieving weight reduction. Automobile hood 1 has a panel 2, a reinforcing member 3, and a joint 4 that joins the panel 2 and the reinforcing member 3. The reinforcing member 3 includes a structure formed from a plurality of units 7 having a hexagonal annular shape disposed in a close-packed arrangement. Unit 7 has a floor 11, inclined wall 12 and top plate 13. The floor 11 is adjacent to the panel 2. Top plate 13 and panel 2 are separated from each other. The inclined wall 12 is arranged between the floor 11 and the top plate 13. A hexagonal annular first ridge line 31 of the unit 7 is located between the inclined wall 12 and the floor 11. A length L1 of one side of the first ridge line 31 is 40-75 mm.Type: ApplicationFiled: December 27, 2019Publication date: March 31, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Tohru YOSHIDA, Koichi HAMADA, Takeshi KAWACHI, Atsuo KOGA, Takuya OISHI
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Publication number: 20220097774Abstract: In an automobile hood, sufficient panel rigidity and dent resistance of a panel are secured while achieving weight reduction. An automobile hood having panel, reinforcing member and joint that joins the panel and the reinforcing member such that the reinforcing member includes a structure formed from a plurality of units having hexagonal annular shape disposed in a close-packed arrangement. Floor of the unit has an annular end part. All of annular end part is located between first circle and second circle wherein first circle is inscribed within a first ridge line overlapping with an outer end part of the floor. Second circle is concentric with first circle and has a radius that is 60% of a radius of the first circle. Width of upper face of floor is 2 mm or more over the entire area of the annular end part in the circumferential direction of the annular end part.Type: ApplicationFiled: December 27, 2019Publication date: March 31, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Tohru YOSHIDA, Koichi HAMADA, Takeshi KAWACHI, Atsuo KOGA, Takuya OISHI
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Publication number: 20220081043Abstract: A reinforcing steel member for a motor vehicle of the present invention includes a steel sheet, a first resin material disposed on at least a part of a surface of the steel sheet, and a second resin material disposed on at least a part of a surface of the first resin material and having a matrix resin and a reinforcing fiber material contained in the matrix resin, in which in a cross section of the first resin material and the second resin material perpendicular to the surface of the steel sheet, between one end portion of the second resin material and the other end portion of the second resin material, there is a portion having a length of 80 mm or more along a boundary between the second resin material and the first resin material, in the first resin material, a protrusion portion having a length X of 3.Type: ApplicationFiled: March 16, 2020Publication date: March 17, 2022Applicant: NIPPON STEEL CORPORATIONInventor: Atsuo KOGA
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Publication number: 20210387679Abstract: This bonded structure includes a first member having a metal portion and a film portion disposed on at least a part of a surface of the metal portion; a second member; an adhesive layer for joining the first member and the second member to each other via the film portion. The film portion contains a resin and inorganic particles. The inorganic particles are formed of ferrosilicon or non-oxide ceramics containing V. Some of the inorganic particles protrude toward the adhesive layer. The particle size of at least some of the inorganic particles protruding toward the adhesive layer is less than the film thickness of the film portion.Type: ApplicationFiled: September 27, 2019Publication date: December 16, 2021Applicant: NIPPON STEEL CORPORATIONInventors: Atsuo KOGA, Masumi KOORI, Kohei UEDA
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Publication number: 20210340407Abstract: This adhesively joined structure includes a first member having a metal portion and a film portion disposed on at least a part of a surface of the metal portion; a second member; an adhesive layer for joining the first member and the second member to each other via the film portion. The film portion includes an organic resin phase containing one or more of a urethane group, an epoxy group, and an ester group; an organic compound phase formed of an organic silicon compound; and optionally an inorganic compound phase formed of an inorganic silicon compound. The total volume percentage of the organic compound phase and the inorganic compound phase to the total volume of the film portion is 16 vol % to 84 vol %. The volume percentage of the organic compound phase to the total volume of the film portion is 16 vol % to 84 vol %. The volume percentage of the inorganic compound phase to the total volume of the film portion is limited to 10 vol % or less.Type: ApplicationFiled: September 27, 2019Publication date: November 4, 2021Applicant: NIPPON STEEL CORPORATIONInventors: Masumi KOORI, Kohei UEDA, Atsushi MORISHITA, Atsuo KOGA
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Patent number: 11077885Abstract: A side sill member includes a hollow member and a reinforcing member. The hollow member includes therein mutually facing first surface and second surface. The reinforcing member stands on the first surface or the second surface inside the hollow member. The reinforcing member is a tubular component having a polygonal cross section. A longest side of the polygonal cross section has a groove extending along an axial direction of the tubular component.Type: GrantFiled: January 23, 2019Date of Patent: August 3, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Atsuo Koga, Satoshi Hirose
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Patent number: 11078550Abstract: A method for manufacturing a quenched molding according to the present disclosure is a method including a first heat treatment process of heating a blanked steel material to a temperature higher than its Ac3 transformation point to perform austenite transformation, and then cooling to induce martensite transformation or bainite transformation, and a second heat treatment process of heating the steel material that has undergone the first heat treatment process to a temperature higher than the Ac3 transformation point to perform austenite transformation, and then cooling to induce martensite transformation. After the steel material has been heated to a temperature higher than the Ac3 transformation point in at least one process from out of the first heat treatment process or the second heat treatment process, molding is completed at a temperature higher than an Ar3 transformation point.Type: GrantFiled: November 22, 2017Date of Patent: August 3, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Yoshiaki Nakazawa, Shinichiro Tabata, Kazuo Hikida, Toshiya Suzuki, Atsuo Koga, Koichi Hamada