Patents Assigned to Kyodo Yushi Co., Ltd.
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Patent number: 11912956Abstract: One aspect of the disclosure relates to a sliding member. The sliding member includes: a first sliding portion having a first lubricant placed between first parts of a first friction sliding mechanism; and a second sliding portion having a second lubricant placed between second parts of a second friction sliding mechanism. The first sliding portion has a lubricant feed port from which the first lubricant is fed, and the second sliding portion has no lubricant feed port from which the second lubricant is fed. The first lubricant contains base oil and an additive. The second lubricant contains base oil and an additive containing conductive carbon. The second lubricant contains a relatively larger amount of conductive carbon than the first lubricant.Type: GrantFiled: July 15, 2021Date of Patent: February 27, 2024Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.Inventors: Junichi Sudo, Youji Kanehara, Koushi Yamada, Kenichiro Sakurai, Ko Tanimura, Tomonobu Komoriya
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Publication number: 20240052255Abstract: A lubricant composition comprises a base oil and at least one of carbon nanotubes with a diameter of 0.4 to 9.0 nm in an amount of 0.001 to 0.08% by mass relative to a total mass of the composition, and the composition has a consistency of 200 to 440.Type: ApplicationFiled: September 30, 2021Publication date: February 15, 2024Applicant: KYODO YUSHI CO., LTD.Inventors: Ryosuke ICHIMURA, Satoshi NOUYAMA, Tomonobu KOMORIYA, Makoto HAYAMA
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Publication number: 20230416633Abstract: The present invention provides a grease composition for constant-velocity joints comprising (a) a base oil, (b) a diurea thickener, (c) molybdenum dithiocarbamate, (d) molybdenum dithiophosphate, (e) overbased calcium sulfonate, and (f) neutral zinc sulfonate. The composition of the present invention is excellent in durability at high temperature and vibration suppression.Type: ApplicationFiled: November 26, 2020Publication date: December 28, 2023Applicants: KYODO YUSHI CO., LTD., GKN Driveline International GmbHInventors: Tadaaki KONNO, Tomohiko YAMAGUCHI, Jisheng E, Christoph LINDLAHR, Joachim WETTE, Tomio SEKI
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Publication number: 20230272299Abstract: The present invention relates to a grease composition including: a base oil; a thickener; a rust inhibitor; and an extreme pressure agent, in which the rust inhibitor includes, with respect to a total mass of the grease composition: 0.10 mass % to 10.00 mass % of a calcium sulfonate; 0.20 mass % to 10.00 mass % of a zinc sulfonate; and 0.10 mass % to 10.00 mass % of a zinc carboxylate, and the extreme pressure agent includes, with respect to the total mass of the grease composition, 2.00 mass % to 14.00 mass % of a zinc dialkyldithiophosphate.Type: ApplicationFiled: July 5, 2021Publication date: August 31, 2023Applicants: JTEKT CORPORATION, KYODO YUSHI CO., LTD.Inventors: Kanako NIIYA, Kazunori MIYAKE, Masayuki MURAKAMI, Shota AKIMOTO, Takahiro MAEDA, Kaname NISHI, Michitaka YOSHIHARA, Kazuki ISA, Koki ANDO
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Patent number: 11713432Abstract: The present disclosure relates to an automotive slide member including a first slide portion having a first lubricant applied between first portions of a first friction slide mechanism, and a second slide portion having a second lubricant applied between second portions of a second friction slide mechanism. The first slide portion is arranged at a part to be touched by an operator who attaches the automotive slide member to an automobile or a user of the automobile. The second slide portion is arranged at a part that is not touched by the operator who attaches the automotive slide member to the automobile or the user of the automobile. The second lubricant contains a relatively larger amount of conductive carbon than that of the first lubricant.Type: GrantFiled: June 30, 2021Date of Patent: August 1, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.Inventors: Junichi Sudo, Youji Kanehara, Koushi Yamada, Kenichiro Sakurai, Ko Tanimura, Tomonobu Komoriya
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Patent number: 11702613Abstract: Provided is a grease composition for a ball joint that can reduce the wear of a ball seat at a slide region and also has excellent compatibility with a dust cover. The grease composition for a ball joint comprises a base oil, a thickener, and an additive. The base oil contains an ethylene-?-olefin copolymer and the kinetic viscosity of the base oil at 40° C. is 2,000 to 6,000 mm2/s. The additive contains a polar wax (e.g., monoamide wax or ester wax).Type: GrantFiled: February 27, 2017Date of Patent: July 18, 2023Assignee: KYODO YUSHI CO., LTD.Inventors: Tsuyoshi Kochi, Mitsuhiro Kakizaki, Yosuke Fujiwara, Tomohiro Monna
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Publication number: 20230139040Abstract: This ball screw grease composition for a rack-assisted electric power steering contains a thickener, a base oil, and at least one compound selected from the group consisting of a Ca sulfonates, fatty acids, and triglycerides, wherein the kinematic viscosity of the base oil at 40° C. is 4-100 mm2/s, and the worked penetration of the composition is 265-385.Type: ApplicationFiled: March 30, 2021Publication date: May 4, 2023Applicant: KYODO YUSHI CO., LTD.Inventors: Minami SOMA, Tsuyoshi KOCHI, Tomonobu KOMORIYA
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Patent number: 11635109Abstract: One aspect of the disclosure relates to a sliding member. The sliding member includes: a first sliding portion having a first lubricant placed between first parts of a first friction sliding mechanism; a second sliding portion having a second lubricant placed between second parts of a second friction sliding mechanism; and a third sliding portion having a third lubricant placed between third parts of a third friction sliding mechanism. The first sliding portion is in contact with the third lubricant, and the second sliding portion is not in contact with the third lubricant. The second lubricant contains an additive containing conductive carbon, and the third lubricant contains no conductive carbon. The second lubricant contains a relatively larger amount of the conductive carbon than the first lubricant.Type: GrantFiled: July 6, 2021Date of Patent: April 25, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.Inventors: Junichi Sudo, Youji Kanehara, Koushi Yamada, Kenichiro Sakurai, Ko Tanimura, Tomonobu Komoriya
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Publication number: 20230100774Abstract: The present invention provides a grease composition to be used for lubrication between resin-made members or lubrication between a resin-made member and a member made from another material. With respect to the total mass of the composition, more than 0.5 mass % but less than 7.5 mass% of a solid organic molybdenum compound is contained.Type: ApplicationFiled: March 22, 2021Publication date: March 30, 2023Applicant: KYODO YUSHI CO., LTD.Inventors: Minami SOMA, Daisuke TSUTSUI, Ryo SHIBATA
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Patent number: 11608859Abstract: One aspect of the disclosure relates to a sliding member. The sliding member includes: a first sliding portion having a first lubricant placed between first parts of a first friction sliding mechanism; a second sliding portion having a second lubricant placed between second parts of a second friction sliding mechanism; and a third sliding portion having a third lubricant placed between third parts of a third friction sliding mechanism. The first sliding portion is in contact with the third lubricant, and the second sliding portion is not in contact with the third lubricant. The second lubricant contains an additive containing conductive carbon, and the third lubricant contains no conductive carbon. The second lubricant contains a relatively larger amount of the conductive carbon than the first lubricant.Type: GrantFiled: July 6, 2021Date of Patent: March 21, 2023Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.Inventors: Junichi Sudo, Youji Kanehara, Koushi Yamada, Kenichiro Sakurai, Ko Tanimura, Tomonobu Komoriya
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Publication number: 20220340833Abstract: The invention provides a grease composition for a speed reducer part of an on-vehicle electric component, the grease composition containing a base oil and a thickener, wherein the base oil is poly-?-olefin or a mixed oil of poly-?-olefin and mineral oil having a kinematic viscosity of 4 to 19 mm2/s at 100° C. and a pour point of ?30° C. or lower, the thickener is a mixture of a diurea compound expressed by formula (1) and a diurea compound expressed by formula (2) R1—NHCONH—R2—NHCONH—R1??(1) R3—NHCONH—R2—NHCONH—R3??(2) wherein R1 is a straight-chain alkyl group having 8 or 18 carbon atoms, R2 is a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and R3 is an aryl group having 6 to 7 carbon atoms, and a penetration of the grease composition is 220 to 280.Type: ApplicationFiled: October 16, 2020Publication date: October 27, 2022Applicant: Kyodo Yushi Co., Ltd.Inventors: Satoshi YAMAZAKI, Yoshiyuki NAGASAWA, Daisuke TSUTSUI, Osamu NAKAMURA, Hiroyuki YOSHIDA, Tsubasa ISHIZEKI
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Publication number: 20220340800Abstract: Provided is a cold and heat storage agent composition that does not fall into the GHS categories, the cold and heat storage agent composition comprising: (A) a dialkyl ether; and (B) a normal paraffin, wherein the (A) contains a dialkyl ether having a straight chain alkyl group, the (B) contains a normal paraffin having 16 to 20 carbon atoms, and a content of the normal paraffin having 16 to 20 carbon atoms is 3.0% by mass or more and less than 10.0% by mass based on a total mass of the composition, and a melting point and a freezing point of the composition measured by DSC are within a range of ?13.0° C. to +12.4° C.Type: ApplicationFiled: April 26, 2022Publication date: October 27, 2022Applicant: KYODO YUSHI CO., LTD.Inventor: Makoto HAYAMA
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Patent number: 11441091Abstract: A grease base oil, containing: condensation esters of alcohols (A) and carboxylic acids (B), wherein the alcohols (A) include a polyhydric alcohol represented by General Formula (1), the carboxylic acids (B) include a fatty acid having 5 to 9 carbon atoms (B-1), a branched fatty acid having 15 to 20 carbon atoms (B-2), a cycloalkane monocarboxylic acid having 4 to 8 carbon atoms (B-3), and an aromatic carboxylic acid (B-4), and the carboxylic acids (B) have a percentage of (B-1) above of 30 mol % to 50 mol %, a percentage of (B-2) above of 30 mol % to 50 mol %, a percentage of (B-3) above of 10 mol % to 30 mol %, and a percentage of (B-4) above of 1 mol % to 15 mol %. The grease base oil contains condensation esters having heat resistance and low temperature storageability.Type: GrantFiled: January 30, 2020Date of Patent: September 13, 2022Assignees: KYODO YUSHI CO., LTD., KAO CORPORATIONInventors: Tatsuya Miyazaki, Yuta Kanazawa, Tomonobu Komoriya, Hiroyuki Ishikawa, Yuta Sato
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Patent number: 11421176Abstract: A grease composition includes a base oil, a thickener, and an additive. The base oil contains a synthetic oil. The thickener contains a compound having a urea group. The additive contains a phosphoric compound, a calcium-based compound, and a hydrocarbon-based wax. A hub unit includes the grease composition enclosed therein.Type: GrantFiled: September 28, 2016Date of Patent: August 23, 2022Assignees: JTEKT CORPORATION, KYODO YUSHI CO., LTD.Inventors: Koji Yoshizaki, Hiroshi Inukai, Yoichiro Sankai, Shinji Yamane, Hideo Shibata, Hirofumi Inoue, Ryuji Nakata, Junichi Imai, Yutaka Imai, Ryosuke Saito, Yuta Sato
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Publication number: 20220112440Abstract: A lubricant that enables to improve control stability of an automobile or the like having a vehicle body charged by driving. A lubricant for improving control stability of an automobile includes a base oil and an additive containing a carbon black. A kit for improving control stability of an automobile includes a discharging member including a protrusion that performs a self-discharging by air-ionizing and the lubricant. A method also improves control stability of an automobile.Type: ApplicationFiled: January 21, 2020Publication date: April 14, 2022Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.Inventors: Junichi SUDO, Hiroyuki ARAI, Youji KANEHARA, Koushi YAMADA, Ko TANIMURA, Tomonobu KOMORIYA
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Publication number: 20220064559Abstract: A grease base oil, containing: condensation esters of alcohols (A) and carboxylic acids (B), wherein the alcohols (A) include a polyhydric alcohol represented by General Formula (1), the carboxylic acids (B) include a fatty acid having 5 to 9 carbon atoms (B-1), a branched fatty acid having 15 to 20 carbon atoms (B-2), a cycloalkane monocarboxylic acid having 4 to 8 carbon atoms (B-3), and an aromatic carboxylic acid (B-4), and the carboxylic acids (B) have a percentage of (B-1) above of 30 mol % to 50 mol %, a percentage of (B-2) above of 30 mol % to 50 mol %, a percentage of (B-3) above of 10 mol % to 30 mol %, and a percentage of (B-4) above of 1 mol % to 15 mol %. The grease base oil contains condensation esters having heat resistance and low temperature storageability.Type: ApplicationFiled: January 30, 2020Publication date: March 3, 2022Applicants: KAO CORPORATION, KYODO YUSHI CO., LTD.Inventors: Tatsuya MIYAZAKI, Yuta KANAZAWA, Tomonobu KOMORIYA, Hiroyuki ISHIKAWA, Yuta SATO
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Publication number: 20220017836Abstract: A grease composition for a tapered roller bearing comprising: (a) at least one compound selected from the group consisting of metallic salts each having a metallic group having a valence of 2 as an additive; (b) a base oil containing a synthetic oil having a viscosity index of 110 or more and a pour point of ?35° C. or less in an amount of 40% or more of the entire base oil; (c) a thickener; and (d) an antioxidant.Type: ApplicationFiled: November 21, 2019Publication date: January 20, 2022Applicant: KYODO YUSHI CO., LTD.Inventors: Kazuki ISA, Yuki TAKEYAMA, Yuta SATO
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Patent number: 11162051Abstract: The present invention provides a grease composition comprising (a) a base oil, (b) a thickener comprising a urea compound, (c) an amine antioxidant at 0.5 to 5% by mass based on a total mass of the composition, and (d) a quinoline antioxidant at 0.5 to 5% by mass based on the total mass of the composition.Type: GrantFiled: August 4, 2017Date of Patent: November 2, 2021Assignee: KYODO YUSHI CO., LTD.Inventors: Iwaki Hirooka, Yuta Sato, Masatoshi Ijima
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Patent number: 11155766Abstract: A grease composition comprises a thickener, a base oil, and a friction modifier. The friction modifier comprises: at least one selected from the group consisting of fatty acids, fatty acid metal salts, phosphate esters, thiophosphate esters, and zinc dithiophosphates; and a polyhydric alcohol ester.Type: GrantFiled: July 26, 2017Date of Patent: October 26, 2021Assignee: KYODO YUSHI CO., LTD.Inventors: Ryosuke Saito, Yuta Sato, Iwaki Hirooka
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Publication number: 20210324294Abstract: The present invention provides a grease composition for electrical contacts, including: a thickener; a base oil; and an organic sulfur compound, wherein the organic sulfur compound is a compound having no heterocycle containing nitrogen in a molecule thereof.Type: ApplicationFiled: April 14, 2021Publication date: October 21, 2021Applicants: KYODO YUSHI CO., LTD., DENSO CORPORATIONInventors: Takahiro NIHIRA, Chiemi NAKAYAMA, Daisuke TSUTSUI, Shozo IKEJIMA, Ryuji AOKI, Takahiro NOZU