Patents by Inventor Yutaka Mabuchi
Yutaka Mabuchi 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: 11926900Abstract: A laminate includes a base substrate, and a coating layer formed on the base substrate. The coating layer includes a copper alloy portions derived from precipitation-hardening copper alloy particles and hard particle portions which are harder than the copper alloy portions, the hard particle portions are derived from hard particles, and the parts bond with each other via an interface. Each of the hard particle portions has a non-spherical shape. A sliding member includes the laminate in at least one sliding portion. A method for manufacturing a laminate includes a step of spraying a mixture in a non-molten state including precipitation-hardening copper alloy particles and hard particles having a non-spherical shape and being harder than the copper alloy particles onto a base substrate, to form a coating layer on the base substrate.Type: GrantFiled: June 3, 2021Date of Patent: March 12, 2024Assignees: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.Inventors: Yoshinori Izawa, Junichi Arai, Yutaka Mabuchi, Katsunori Otobe, Shinichi Nishimura
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Publication number: 20230382814Abstract: A manufacturing method of a heat shield component includes a mixing step of mixing sol including a ceramic precursor with heat-expandable microspheres having an outer shell formed of thermoplastic resin and encapsulating a foaming agent so as to obtain a mixed solution, a coating step of applying the mixed solution to a substrate to obtain a coated product, and a heating step of heating the coated product to form a base body including a ceramic from the ceramic precursor, and leading the heat-expandable microspheres to foam so as to form a ceramic porous layer including closed pores in the base body. The ceramic porous layer has a porosity in a range of 40% to 70%.Type: ApplicationFiled: August 9, 2023Publication date: November 30, 2023Inventors: Yuka Suzuki, Yutaka Mabuchi
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Patent number: 11680499Abstract: A sliding member of the present invention includes a coating on a base material. The coating contains hard metal particles and corrosion-resistant metal particles that have hardness lower than that of the hard metal particles. The hard metal particles contain particles that have at least Vickers hardness of 600 Hv or higher. The corrosion-resistant metal particles are made of at least one kind of metal selected from the group consisting of copper (Cu), cobalt (Co), chromium (Cr), and nickel (Ni), or are made of an alloy containing said metal. The coating has a cross section in which the hard metal particles are dispersed in an island manner in a particle aggregate of the corrosion-resistant metal particles and in which an area ratio of the corrosion-resistant metal particles is 30% or larger. Thus, corrosion of the hard metal particles in the coating is prevented, whereby the sliding member maintains wear resistance for a long time.Type: GrantFiled: July 19, 2018Date of Patent: June 20, 2023Assignee: NISSAN MOTOR CO., LTD.Inventors: Yoshinori Izawa, Yutaka Mabuchi, Akinobu Itou, Junichi Arai, Misao Mogami, Masanao Harada, Moriyuki Nogami
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Patent number: 11433637Abstract: A heat shield component includes a substrate, and a heat shield film arranged on the substrate. The heat shield film includes a first layer arranged on the substrate, including pores, and having a thermal conductivity of 0.3 W/(m·K) or less and a volumetric specific heat of 1200 kJ/(m3·K) or less, and a second layer arranged on the first layer to provide closed pores between the first layer and the second layer. The heat shield film has a surface roughness on a top surface which is 1.5 ?m Ra or less. The heat shield component can achieve high heat-insulating properties and an improved effect of reducing the emission amount of hydrocarbon in an internal combustion engine, for example.Type: GrantFiled: August 14, 2017Date of Patent: September 6, 2022Assignee: Nissan Motor Co., Ltd.Inventors: Yuka Suzuki, Yutaka Mabuchi, Takuma Suzuki, Ken Tsutsuji
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Patent number: 11231067Abstract: A bearing member 1 is provided with a coating layer 3 on an inner circumferential surface of a shaft hole 1A into which a shaft body 2 is to be fitted. The coating layer 3 is composed of a metal base material 3A and a heat conductive material 3B that is dispersed in the base material 3A and that has a thermal conductivity relatively higher than that of the base material 3A. The heat conductive material 3B has lengths Lb and Lc in directions B and C along a surface of the coating layer 3, longer than a length La in a thickness direction A of the coating layer 3, whereby thermal conductive characteristics in the directions B and C along the inner circumferential surface of the shaft hole 1A are enhanced. Thus, heat dissipation is improved, whereby temperature rise due to sliding contact with the shaft body 2 is suppressed, and seizure resistance is improved.Type: GrantFiled: May 10, 2018Date of Patent: January 25, 2022Assignee: NISSAN MOTOR CO., LTD.Inventors: Hayato Hirayama, Yutaka Mabuchi, Tsuyoshi Higuchi, Takemichi Yamashita
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Patent number: 11193537Abstract: A bearing member (B1) having a coating layer (1) on an internal circumferential surface of a shaft hole (H) configured to mount a shaft body (P1), the coating layer (1) having a metal layer (2) whose surface is formed unevenly, and a resin layer (3) formed on the metal layer (2), the metal layer (2) having a part thereof exposed (2A) on a surface of the resin layer (3), to inhibit the increase in temperature caused by sliding contact with the shaft body (P1), and accomplishing improvement in seizure resistance.Type: GrantFiled: March 12, 2018Date of Patent: December 7, 2021Assignee: NISSAN MOTOR CO., LTD.Inventors: Hayato Hirayama, Takemichi Yamashita, Tsuyoshi Higuchi, Yutaka Mabuchi
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Patent number: 11186795Abstract: A sliding mechanism excellent in seizure resistance is provided. A sliding mechanism including a lubricating oil interposed at a sliding surface between a DLC coating sliding member (A) and a sliding member (B), wherein the DLC coating sliding member (A) has a DLC film covered on a base material, and metal films in an island configuration are covered on a surface of the DLC film.Type: GrantFiled: December 28, 2017Date of Patent: November 30, 2021Assignee: NISSAN MOTOR CO., LTD.Inventors: Seiichi Nakano, Yutaka Mabuchi, Tsuyoshi Higuchi, Takemichi Yamashita, Hiroshi Tosaka
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Patent number: 11148195Abstract: A laminate includes a base substrate, and a coating layer formed on the base substrate. The coating layer includes a copper alloy portions derived from precipitation-hardening copper alloy particles and hard particle portions which are harder than the copper alloy portions, the hard particle portions are derived from hard particles, and the parts bond with each other via an interface. Each of the hard particle portions has a non-spherical shape. A sliding member includes the laminate in at least one sliding portion. A method for manufacturing a laminate includes a step of spraying a mixture in a non-molten state including precipitation-hardening copper alloy particles and hard particles having a non-spherical shape and being harder than the copper alloy particles onto a base substrate, to form a coating layer on the base substrate.Type: GrantFiled: February 2, 2018Date of Patent: October 19, 2021Assignees: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.Inventors: Yoshinori Izawa, Junichi Arai, Yutaka Mabuchi, Katsunori Otobe, Shinichi Nishimura
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Publication number: 20210291263Abstract: A laminate includes a base substrate, and a coating layer formed on the base substrate. The coating layer includes a copper alloy portions derived from precipitation-hardening copper alloy particles and hard particle portions which are harder than the copper alloy portions, the hard particle portions are derived from hard particles, and the parts bond with each other via an interface. Each of the hard particle portions has a non-spherical shape. A sliding member includes the laminate in at least one sliding portion. A method for manufacturing a laminate includes a step of spraying a mixture in a non-molten state including precipitation-hardening copper alloy particles and hard particles having a non-spherical shape and being harder than the copper alloy particles onto a base substrate, to form a coating layer on the base substrate.Type: ApplicationFiled: June 3, 2021Publication date: September 23, 2021Applicants: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.Inventors: Yoshinori IZAWA, Junichi ARAI, Yutaka MABUCHI, Katsunori OTOBE, Shinichi NISHIMURA
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Publication number: 20210293158Abstract: A sliding member of the present invention includes a coating on a base material. The coating contains hard metal particles and corrosion-resistant metal particles that have hardness lower than that of the hard metal particles. The hard metal particles contain particles that have at least Vickers hardness of 600 Hv or higher. The corrosion-resistant metal particles are made of at least one kind of metal selected from the group consisting of copper (Cu), cobalt (Co), chromium (Cr), and nickel (Ni), or are made of an alloy containing said metal. The coating has a cross section in which the hard metal particles are dispersed in an island manner in a particle aggregate of the corrosion-resistant metal particles and in which an area ratio of the corrosion-resistant metal particles is 30% or larger. Thus, corrosion of the hard metal particles in the coating is prevented, whereby the sliding member maintains wear resistance for a long time.Type: ApplicationFiled: July 19, 2018Publication date: September 23, 2021Applicant: NISSAN MOTOR CO., LTD.Inventors: Yoshinori IZAWA, Yutaka MABUCHI, Akinobu ITOU, Junichi ARAI, Misao MOGAMI, Masanao HARADA, Moriyuki NOGAMI
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Publication number: 20210253898Abstract: A heat shielding member includes a base, and a heat shielding membrane on the base. The heat shielding membrane includes a porous layer including at least a closed pore. The porous layer includes resin and carbon-based filler. The heat shielding member has both of low thermal conductivity and low heat capacity and improves the fuel economy performance.Type: ApplicationFiled: June 13, 2018Publication date: August 19, 2021Applicant: NISSAN MOTOR CO., LTD.Inventors: Yuka SUZUKI, Yutaka MABUCHI, Takuma SUZUKI, Junichi ARAI
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Publication number: 20210239156Abstract: A bearing member 1 is provided with a coating layer 3 on an inner circumferential surface of a shaft hole 1A into which a shaft body 2 is to be fitted. The coating layer 3 is composed of a metal base material 3A and a heat conductive material 3B that is dispersed in the base material 3A and that has a thermal conductivity relatively higher than that of the base material 3A. The heat conductive material 3B has lengths Lb and Lc in directions B and C along a surface of the coating layer 3, longer than a length La in a thickness direction A of the coating layer 3, whereby thermal conductive characteristics in the directions B and C along the inner circumferential surface of the shaft hole 1A are enhanced. Thus, heat dissipation is improved, whereby temperature rise due to sliding contact with the shaft body 2 is suppressed, and seizure resistance is improved.Type: ApplicationFiled: May 10, 2018Publication date: August 5, 2021Applicant: NISSAN MOTOR CO., LTD.Inventors: Hayato HIRAYAMA, Yutaka MABUCHI, Tsuyoshi HIGUCHI, Takemichi YAMASHITA
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Publication number: 20210187909Abstract: A heat shield component includes a substrate, and a heat shield film arranged on the substrate. The heat shield film includes a first layer arranged on the substrate, including pores, and having a thermal conductivity of 0.3 W/(m·K) or less and a volumetric specific heat of 1200 kJ/(m3·K) or less, and a second layer arranged on the first layer to provide closed pores between the first layer and the second layer. The heat shield film has a surface roughness on a top surface which is 1.5 ?m Ra or less. The heat shield component can achieve high heat-insulating properties and an improved effect of reducing the emission amount of hydrocarbon in an internal combustion engine, for example.Type: ApplicationFiled: August 14, 2017Publication date: June 24, 2021Inventors: Yuka Suzuki, Yutaka Mabuchi, Takuma Suzuki, Ken Tsutsuji
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Patent number: 10982622Abstract: A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes a steel portion derived from austenitic stainless steel particles and a copper portion derived from copper particles or copper alloy particles. The steel portion and the copper portion are bonded to each other via an interface between the steel portion and the copper portion.Type: GrantFiled: February 2, 2018Date of Patent: April 20, 2021Assignees: NISSAN MOTOR CO., LTD., RENAULT S.A.S.Inventors: Yoshinori Izawa, Yutaka Mabuchi, Junichi Arai, Christian Grente, Elodie Bonay, Carolina Specht, Jean Marie Mahlaire
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Patent number: 10941727Abstract: In a piston of an internal combustion engine in which a recessed portion that holds an intake air swirling flow is formed on a crown surface of the piston, the crown surface includes a heat insulating film formation portion having a heat insulating film whose thermal conductivity is lower than a base material of the piston, the heat insulating film whose thermal capacity per volume is smaller than the base material of the piston, and a heat insulating film non-formation portion provided at a position on the more outside of a cylinder bore side of the internal combustion engine than the heat insulating film formation portion, the heat insulating film non-formation portion not having the heat insulating film.Type: GrantFiled: April 4, 2017Date of Patent: March 9, 2021Assignee: NISSAN MOTOR CO., LTD.Inventors: Takuma Suzuki, Yutaka Mabuchi, Yuka Suzuki
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Publication number: 20210010537Abstract: A bearing member (B1) having a coating layer (1) on an internal circumferential surface of a shaft hole (H) configured to mount a shaft body (P1), the coating layer (1) having a metal layer (2) whose surface is formed unevenly, and a resin layer (3) formed on the metal layer (2), the metal layer (2) having a part thereof exposed (2A) on a surface of the resin layer (3), to inhibit the increase in temperature caused by sliding contact with the shaft body (P1), and accomplishing improvement in seizure resistance.Type: ApplicationFiled: March 12, 2018Publication date: January 14, 2021Applicant: NISSAN MOTOR CO., LTD.Inventors: Hayato HIRAYAMA, Takemichi YAMASHITA, Tsuyoshi HIGUCHI, Yutaka MABUCHI
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Publication number: 20200385645Abstract: A sliding mechanism excellent in seizure resistance is provided. A sliding mechanism including a lubricating oil interposed at a sliding surface between a DLC coating sliding member (A) and a sliding member (B), wherein the DLC coating sliding member (A) has a DLC film covered on a base material, and metal films in an island configuration are covered on a surface of the DLC film.Type: ApplicationFiled: December 28, 2017Publication date: December 10, 2020Applicant: NISSAN MOTOR CO., LTD.Inventors: Seiichi NAKANO, Yutaka MABUCHI, Tsuyoshi HIGUCHI, Takemichi YAMASHITA, Hiroshi TOSAKA
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Publication number: 20200369576Abstract: A heat shield component includes a substrate, and a ceramic porous layer arranged on the substrate, the ceramic porous layer including a base body including ceramic, and pores included in the base body. Inner walls of the pores are covered with thermoplastic resin, and a porosity of the ceramic porous layer is in a range of 40% to 70%. The heat shield component can achieve high heat-insulating properties.Type: ApplicationFiled: August 14, 2017Publication date: November 26, 2020Inventors: Yuka Suzuki, Yutaka Mabuchi
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Patent number: 10745809Abstract: A method for producing a laminated member includes a step of spraying a mixture in a non-molten state including a plurality of precipitation hardening copper alloy particles and a plurality of hard particles that have non-spherical shapes having a median aspect ratio of equal to or more than 1.2 and are harder than the copper alloy particles onto a base substrate to form a coating layer on the base substrate.Type: GrantFiled: February 2, 2018Date of Patent: August 18, 2020Assignees: NISSAN MOTOR CO., LTD., FUKUDA METAL FOIL & POWDER CO., LTD.Inventors: Yoshinori Izawa, Junichi Arai, Yutaka Mabuchi, Katsunori Otobe, Shinichi Nishimura
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Publication number: 20200248647Abstract: A sliding member includes a base substrate and a coating layer formed on the base substrate. The coating layer includes a steel portion derived from austenitic stainless steel particles and a copper portion derived from copper particles or copper alloy particles. The steel portion and the copper portion are bonded to each other via an interface between the steel portion and the copper portion.Type: ApplicationFiled: February 2, 2018Publication date: August 6, 2020Applicants: NISSAN MOTOR CO., LTD., RENAULT s.a.s.Inventors: Yoshinori IZAWA, Yutaka MABUCHI, Junichi ARAI, Christian GRENTE, Elodie BONAY, Carolina SPECHT, Jean Marie MAHLAIRE