Patents by Inventor Kenji NIMURA
Kenji NIMURA 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: 11629755Abstract: A sliding member includes a resin overlay layer on a sliding surface side coming into sliding contact with a mating member. The resin overlay layer has a surface roughness parameter Rk satisfying 0.4?Rk?1.2, and a surface area ratio S=S2/S1 calculated when an area of an arbitrary measurement field of view is designated by S1 and a surface area of the measurement field of view is designated by S2 satisfies 2.5?S?4.5.Type: GrantFiled: February 18, 2021Date of Patent: April 18, 2023Assignee: DAIDO METAL COMPANY LTD.Inventors: Shigeru Inami, Erina Yasuda, Kenji Nimura
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Publication number: 20220381292Abstract: A sliding member includes a resin overlay layer on a sliding-surface side of a bearing alloy layer. The resin layer includes a resin binder and 20% by volume or more of solid lubricant particles with an anisotropic shape dispersed in the resin binder. The sliding surface is located at 0° and has a virtual axis perpendicular to the sliding surface at 90°. An angle ? is formed by a straight line and a major axis of the particles. The total number of the particles in a observation region is N. A rate R1=N1/N of the number N1 of first particles at the angle ? of 70°???90° from among the particles is 3%?R1?20%, and a rate R2=N2/N of the number N2 of second particles with the angle ? being ??20° is 35%?R2?65%.Type: ApplicationFiled: November 27, 2020Publication date: December 1, 2022Inventors: Tetsuya OGAWA, Erina YASUDA, Kenji NIMURA
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Patent number: 11454281Abstract: Disclosed herein is a sliding member for an internal-combustion engine of an automobile or the like. The sliding member has excellent sliding properties due to high oleophilicity of its sliding surface achieved by adjusting the surface texture of a resin layer forming the sliding surface, which makes it possible to effectively prevent wear or seizure of the sliding member and a counterpart sliding member thereof. The sliding member includes a resin layer provided on a surface of a base material, in which the resin layer has a surface roughness of 1.05 or more, preferably 1.07 or more. The mean spacing (s) between local peaks of the resin layer may be in the range of 2 ?m or more but 12 ?m or less, but may be preferably in the range of 2 ?m or more but 10 ?m or less. Further, the mean height (Rc) of the resin layer may be in the range of 0.5 ?m or more but 5.0 ?m or less, but may be preferably in the range of 0.5 ?m or more but 3.0 ?m or less.Type: GrantFiled: December 25, 2018Date of Patent: September 27, 2022Assignee: DAIDO METAL COMPANY LTD.Inventors: Kenji Nimura, Erina Yasuda
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Publication number: 20210301872Abstract: A sliding member includes a resin overlay layer on a sliding surface side coming into sliding contact with a mating member. The resin overlay layer has a surface roughness parameter Rk satisfying 0.4?Rk?1.2, and a surface area ratio S=S2/S1 calculated when an area of an arbitrary measurement field of view is designated by S1 and a surface area of the measurement field of view is designated by S2 satisfies 2.5?S?4.5.Type: ApplicationFiled: February 18, 2021Publication date: September 30, 2021Inventors: Shigeru INAMI, Erina YASUDA, Kenji NIMURA
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Publication number: 20200408258Abstract: Disclosed herein is a sliding member for an internal-combustion engine of an automobile or the like. The sliding member has excellent sliding properties due to high oleophilicity of its sliding surface achieved by adjusting the surface texture of a resin layer forming the sliding surface, which makes it possible to effectively prevent wear or seizure of the sliding member and a counterpart sliding member thereof. The sliding member includes a resin layer provided on a surface of a base material, in which the resin layer has a surface roughness of 1.05 or more, preferably 1.07 or more. The mean spacing (s) between local peaks of the resin layer may be in the range of 2 ?m or more but 12 ?m or less, but may be preferably in the range of 2 ?m or more but 10 ?m or less. Further, the mean height (Rc) of the resin layer may be in the range of 0.5 ?m or more but 5.0 ?m or less, but may be preferably in the range of 0.5 ?m or more but 3.0 ?m or less.Type: ApplicationFiled: December 25, 2018Publication date: December 31, 2020Inventors: Kenji NIMURA, Erina YASUDA
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Patent number: 10808759Abstract: A sliding member of the present embodiment includes a bearing alloy layer and a coating layer provided on a sliding surface side thereof. The coating layer has a resin binder with sulfide particles dispersed therein. A covering portion is provided over specific particles and is made of metal oxide comprising the same metal element as a metal element constituting the sulfide particles. When measured by an X-ray photoelectron spectroscopy and an X-ray diffraction method, a ratio of a peak height of the metal oxide to a peak height of metal sulfide by the X-ray photoelectron spectroscopy is from 0.10 to 0.50, and a ratio of the peak height of the metal oxide to the peak height of the metal sulfide by the X-ray diffraction method is 0.10 or less.Type: GrantFiled: October 16, 2019Date of Patent: October 20, 2020Assignee: DAIDO METAL COMPANY LTD.Inventors: Kazuki Sakai, Shigeru Inami, Kenji Nimura
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Publication number: 20200124099Abstract: A sliding member of the present embodiment includes a bearing alloy layer and a coating layer provided on a sliding surface side thereof. The coating layer has a resin binder with sulfide particles dispersed therein. A covering portion is provided over specific particles and is made of metal oxide comprising the same metal element as a metal element constituting the sulfide particles. When measured by an X-ray photoelectron spectroscopy and an X-ray diffraction method, a ratio of a peak height of the metal oxide to a peak height of metal sulfide by the X-ray photoelectron spectroscopy is from 0.10 to 0.50, and a ratio of the peak height of the metal oxide to the peak height of the metal sulfide by the X-ray diffraction method is 0.10 or less.Type: ApplicationFiled: October 16, 2019Publication date: April 23, 2020Inventors: Kazuki SAKAI, Shigeru INAMI, Kenji NIMURA
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Patent number: 10125277Abstract: Disclosed herein is a sliding member that has a coating layer serving as a sliding surface thereof so that even when foreign matter enters between the coating layer and a partner member, smoothness between them is maintained to prevent the occurrence of seizing. When the coating layer has an elastic recovery ratio of less than 60%, foreign matter that has entered between the coating layer and the sliding surface of a partner member is efficiently embedded in the coating layer. When the coating layer is formed of a resin composition, the resin composition contains a binder resin, a solid lubricant, and metal particles having a Young's modulus of 10 GPa or more but 100 GPa or less.Type: GrantFiled: April 20, 2017Date of Patent: November 13, 2018Assignee: DAIDO METAL COMPANY LTD.Inventors: Erina Yasuda, Hiroki Kobayakawa, Kenji Nimura
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Publication number: 20170313893Abstract: Disclosed herein is a sliding member that has a coating layer serving as a sliding surface thereof so that even when foreign matter enters between the coating layer and a partner member, smoothness between them is maintained to prevent the occurrence of seizing. When the coating layer has an elastic recovery ratio of less than 60%, foreign matter that has entered between the coating layer and the sliding surface of a partner member is efficiently embedded in the coating layer. When the coating layer is formed of a resin composition, the resin composition contains a binder resin, a solid lubricant, and metal particles having a Young's modulus of 10 GPa or more but 100 GPa or less.Type: ApplicationFiled: April 20, 2017Publication date: November 2, 2017Inventors: Erina YASUDA, Hiroki KOBAYAKAWA, Kenji NIMURA