Patents by Inventor Kenzo Tadokoro
Kenzo Tadokoro 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: 11976689Abstract: A sliding member includes a metallic substrate, a porous layer formed on a surface of the metallic substrate, and a sliding layer that covers the porous layer. The porous layer is made of a metal itself or an alloy composition. The sliding layer is made of a lead-free resin composition. The resin composition contains an essential additive, optionally an optional additive, and a fluororesin. The essential additive is any one of a combination of a zinc compound and a carbon fiber, a combination of a zinc compound and an iron oxide, and a combination of a zinc compound, a carbon fiber and an iron oxide. A total content of the essential additive and the optional additive is 10 vol % or more and 35 vol % or less in the resin composition.Type: GrantFiled: June 11, 2020Date of Patent: May 7, 2024Assignee: Senju Metal Industry Co., Ltd.Inventors: Kimihiko Kurosaki, Kenzo Tadokoro, Minoru Toyoda
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Patent number: 11261914Abstract: A sliding member includes a metallic substrate, a porous layer formed on a surface of the metallic substrate, and a sliding layer that covers the porous layer. The porous layer is made of a metal itself or an alloy composition. The sliding layer is made of a lead-free resin composition. The resin composition consists of a pitch-based carbon fiber and a fluororesin, and assuming weight of the resin composition as 100, more than 10 weight % and 35 weight % or less of the pitch-based carbon fiber is contained.Type: GrantFiled: December 13, 2018Date of Patent: March 1, 2022Assignee: Senju Metal Industry Co., Ltd.Inventors: Kimihiko Kurosaki, Kenzo Tadokoro, Minoru Toyoda
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Publication number: 20210071713Abstract: A sliding member includes a metallic substrate, a porous layer formed on a surface of the metallic substrate and a sliding layer that covers the porous layer. The porous layer is made of a metal itself or an alloy composition. The sliding layer is made of a lead-free resin composition. The resin composition consists of a pitch-based carbon fiber and a fluororesin, and assuming weight of the resin composition as 100, more than 10 weight % and 35 weight % or less of the pitch-based carbon fiber is contained.Type: ApplicationFiled: December 13, 2018Publication date: March 11, 2021Inventors: Kimihiko Kurosaki, Kenzo Tadokoro, Minoru Toyoda
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Publication number: 20200392993Abstract: A sliding member includes a metallic substrate, a porous layer formed on a surface of the metallic substrate, and a sliding layer that covers the porous layer. The porous layer is made of a metal itself or an alloy composition. The sliding layer is made of a lead-free resin composition. The resin composition contains an essential additive, optionally an optional additive, and a fluororesin. The essential additive is any one of a combination of a zinc compound and a carbon fiber, a combination of a zinc compound and an iron oxide, and a combination of a zinc compound, a carbon fiber and an iron oxide. A total content of the essential additive and the optional additive is 10 vol % or more and 35 vol % or less in the resin composition.Type: ApplicationFiled: June 11, 2020Publication date: December 17, 2020Inventors: Kimihiko Kurosaki, Kenzo Tadokoro, Minoru Toyoda
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Publication number: 20190186539Abstract: Provided is a sliding member and a bearing using the sliding member. The sliding member contains a metallic substrate, a porous layer formed on a surface of the metallic substrate, and a sliding layer covered on the porous layer. The sliding layer is made of a lead-free resin composition. The lead-free resin composition includes a pitch-based carbon fiber, a fluorocarbon resin, and any of or a combination of two or more of aramid fiber, iron oxide, molybdenum disulfide, graphite, and zinc, zinc alloy, or zinc compound. 0.5 weight % or more and 17 weight % or less of a pitch-based carbon fiber is included. A total addition amount of additives excluding the fluorocarbon resin is 25 volume % or less.Type: ApplicationFiled: December 10, 2018Publication date: June 20, 2019Inventors: Kimihiko Kurosaki, Kenzo Tadokoro, Minoru Toyoda
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Patent number: 9163669Abstract: To provide a sliding member that improves seizure resistance by restraining any exposure of the porous layer and improves abrasion resistance and load resistance. The sliding member 1 constitutes a bearing having a cylindrical shape, an inner circumferential surface of which is a sliding layer 5 with an axis. In the sliding member 1, a porous layer 3 made of alloy material is formed on a surface of a metal base 2 and this porous layer 3 is covered by resin material 4 so that the sliding layer 5 is formed. In the sliding member 1, a particle size of metal powder 30 forming the porous layer 3 is within a range of 15 through 60 ?m, preferably, about 25 through 45 ?m. Further, in the sliding member 1, a thickness of the porous layer 3 is within a range of 0.06 through 0.1 mm and a thickness of the sliding layer 5 is within a range of 0.08 through 0.16 mm The thickness of the sliding layer 5 is set to be thicker on average than the thickness of the porous layer 3 so that the porous layer 3 is not exposed.Type: GrantFiled: December 22, 2011Date of Patent: October 20, 2015Assignee: Senju Metal Industry Co., Ltd.Inventors: Ryoichi Kurata, Kenzo Tadokoro, Kazushige Kumagai
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Patent number: 8896119Abstract: A semiconductor device is provided which has internal bonds which do not melt at the time of mounting on a substrate. A bonding material is used for internal bonding of the semiconductor device. The bonding material is obtained by filling the pores of a porous metal body having a mesh-like structure and covering the surface thereof with Sn or an Sn-based solder alloy.Type: GrantFiled: August 3, 2011Date of Patent: November 25, 2014Assignee: Senju Metal Industry Co., Ltd.Inventors: Yoshitsugu Sakamoto, Hiroyuki Yamada, Yoshie Yamanaka, Tsukasa Ohnishi, Shunsaku Yoshikawa, Kenzo Tadokoro
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Patent number: 8727622Abstract: To provide a sliding member which can control a relationship between dynamic friction force and static friction force, a sliding member 1 constitutes a bearing having a cylindrical shape and its internal circumferential surface is a sliding layer 2 along a shaft. The sliding member 1 is provided a surface of the sliding layer 2 with uneven surface 6. The uneven surface 6 has the line-like projections 6a, vertexes of which are arranged in gridlike fashion, in the embodiment, to prevent an oil film from being formed and to make the dynamic friction force larger and keep the rate of change in the dynamic friction force in relation to the static friction force smaller. The sliding layer is configured so that a porous layer made of alloy material is formed on a surface of a metal substrate and the resin filled into the porous layer is sintered.Type: GrantFiled: April 25, 2012Date of Patent: May 20, 2014Assignee: Senju Metal Industry Co., Ltd.Inventors: Ryoichi Kurata, Kenzo Tadokoro, Hideaki Tanibata
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Publication number: 20140099048Abstract: To provide a sliding member that improves seizure resistance by restraining any exposure of the porous layer and improves abrasion resistance and load resistance. The sliding member 1 constitutes a bearing having a cylindrical shape, an inner circumferential surface of which is a sliding layer 5 with an axis. In the sliding member 1, a porous layer 3 made of alloy material is formed on a surface of a metal base 2 and this porous layer 3 is covered by resin material 4 so that the sliding layer 5 is formed. In the sliding member 1, a particle size of metal powder 30 forming the porous layer 3 is within a range of 15 through 60 ?m, preferably, about 25 through 45 ?m. Further, in the sliding member 1, a thickness of the porous layer 3 is within a range of 0.06 through 0.1 mm and a thickness of the sliding layer 5 is within a range of 0.08 through 0.16 mm The thickness of the sliding layer 5 is set to be thicker on average than the thickness of the porous layer 3 so that the porous layer 3 is not exposed.Type: ApplicationFiled: December 22, 2011Publication date: April 10, 2014Applicant: SENJU METAL INDUSTRY CO., LTD.Inventors: Ryoichi Kurata, Kenzo Tadokoro, Kazushige Kumagai
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Publication number: 20140064641Abstract: To provide a sliding member which can control a relationship between dynamic friction force and static friction force. A sliding member 1 constitutes a bearing having a cylindrical shape and its internal circumferential surface is a sliding layer 2 along a shaft. The sliding member 1 is provided a surface of the sliding layer 2 with uneven surface 6. The uneven surface 6 has the line-like projections 6a, vertexes of which are arranged in gridlike fashion, in the embodiment, to prevent an oil film from being formed and to make the dynamic friction force larger and keep the rate of change in the dynamic friction force in relation to the static friction force smaller. The sliding layer is configured so that a porous layer made of alloy material is formed on a surface of a metal substrate and the resin filled into the porous layer is sintered.Type: ApplicationFiled: April 25, 2012Publication date: March 6, 2014Applicant: SENJU METAL INDUSTRY CO., LTD.Inventors: Ryoichi Kurata, Kenzo Tadokoro, Hideaki Tanibata
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Publication number: 20130134591Abstract: A semiconductor device is provided which has internal bonds which do not melt at the time of mounting on a substrate. A bonding material is used for internal bonding of the semiconductor device. The bonding material is obtained by filling the pores of a porous metal body having a mesh-like structure and covering the surface thereof with Sn or an Sn-based solder alloy.Type: ApplicationFiled: August 3, 2011Publication date: May 30, 2013Inventors: Yoshitsugu Sakamoto, Hiroyuki Yamada, Yoshie Yamanaka, Tsukasa Ohnishi, Shunsaku Yoshikawa, Kenzo Tadokoro
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Patent number: 7255933Abstract: A multi-layer sliding part is prepared by a process including mixing 1–50 parts by volume of a Cu-plated solid lubricant powder with 100 parts by volume of a Cu-based alloy powder comprising 5–20 mass % of Sn and a remainder of Cu to form a mixed powder, sintering the mixed powder in a reducing atmosphere to form a sintered mass, pulverizing the sintered mass to form a powder, dispersing the powder formed by pulverizing on a metal backing plate, and sintering the dispersed powder to bond grains of the dispersed powder to each other and to the backing plate. After sintering of the pulverized powder to form bearing metal layer, the bearing metal layer is pressed and densified. After densification, the bearing metal layer is annealed, again pressed, and then coated with a resin having good sliding properties.Type: GrantFiled: August 17, 2004Date of Patent: August 14, 2007Assignee: Senju Metal Industry Co., Ltd.Inventors: Issaku Sato, Kenzo Tadokoro, Hideaki Tanibata
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Publication number: 20050069448Abstract: A multi-layer sliding part is prepared by a process including mixing 1-50 parts by volume of a Cu-plated solid lubricant powder with 100 parts by volume of a Cu-based alloy powder comprising 5-20 mass % of Sn and a remainder of Cu to form a mixed powder, sintering the mixed powder in a reducing atmosphere to form a sintered mass, pulverizing the sintered mass to form a powder, dispersing the powder formed by pulverizing on a metal backing plate, and sintering the dispersed powder to bond grains of the dispersed powder to each other and to the backing plate. After sintering of the pulverized powder to form bearing metal layer, the bearing metal layer is pressed and densified. After densification, the bearing metal layer is annealed, again pressed, and then coated with a resin having good sliding properties.Type: ApplicationFiled: August 17, 2004Publication date: March 31, 2005Inventors: Issaku Sato, Kenzo Tadokoro, Hideaki Tanibata