Patents Assigned to Kyodo Yushi Co., Ltd.
  • Publication number: 20240052255
    Abstract: 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: Application
    Filed: September 30, 2021
    Publication date: February 15, 2024
    Applicant: KYODO YUSHI CO., LTD.
    Inventors: Ryosuke ICHIMURA, Satoshi NOUYAMA, Tomonobu KOMORIYA, Makoto HAYAMA
  • Publication number: 20230416633
    Abstract: 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: Application
    Filed: November 26, 2020
    Publication date: December 28, 2023
    Applicants: KYODO YUSHI CO., LTD., GKN Driveline International GmbH
    Inventors: Tadaaki KONNO, Tomohiko YAMAGUCHI, Jisheng E, Christoph LINDLAHR, Joachim WETTE, Tomio SEKI
  • Publication number: 20230272299
    Abstract: 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: Application
    Filed: July 5, 2021
    Publication date: August 31, 2023
    Applicants: 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
  • Patent number: 11713432
    Abstract: 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: Grant
    Filed: June 30, 2021
    Date of Patent: August 1, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.
    Inventors: Junichi Sudo, Youji Kanehara, Koushi Yamada, Kenichiro Sakurai, Ko Tanimura, Tomonobu Komoriya
  • Patent number: 11702613
    Abstract: 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: Grant
    Filed: February 27, 2017
    Date of Patent: July 18, 2023
    Assignee: KYODO YUSHI CO., LTD.
    Inventors: Tsuyoshi Kochi, Mitsuhiro Kakizaki, Yosuke Fujiwara, Tomohiro Monna
  • Publication number: 20230139040
    Abstract: 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: Application
    Filed: March 30, 2021
    Publication date: May 4, 2023
    Applicant: KYODO YUSHI CO., LTD.
    Inventors: Minami SOMA, Tsuyoshi KOCHI, Tomonobu KOMORIYA
  • Patent number: 11635109
    Abstract: 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: Grant
    Filed: July 6, 2021
    Date of Patent: April 25, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.
    Inventors: Junichi Sudo, Youji Kanehara, Koushi Yamada, Kenichiro Sakurai, Ko Tanimura, Tomonobu Komoriya
  • Publication number: 20230100774
    Abstract: 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: Application
    Filed: March 22, 2021
    Publication date: March 30, 2023
    Applicant: KYODO YUSHI CO., LTD.
    Inventors: Minami SOMA, Daisuke TSUTSUI, Ryo SHIBATA
  • Patent number: 11608859
    Abstract: 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: Grant
    Filed: July 6, 2021
    Date of Patent: March 21, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.
    Inventors: Junichi Sudo, Youji Kanehara, Koushi Yamada, Kenichiro Sakurai, Ko Tanimura, Tomonobu Komoriya
  • Publication number: 20220340800
    Abstract: 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: Application
    Filed: April 26, 2022
    Publication date: October 27, 2022
    Applicant: KYODO YUSHI CO., LTD.
    Inventor: Makoto HAYAMA
  • Publication number: 20220340833
    Abstract: 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: Application
    Filed: October 16, 2020
    Publication date: October 27, 2022
    Applicant: Kyodo Yushi Co., Ltd.
    Inventors: Satoshi YAMAZAKI, Yoshiyuki NAGASAWA, Daisuke TSUTSUI, Osamu NAKAMURA, Hiroyuki YOSHIDA, Tsubasa ISHIZEKI
  • Patent number: 11441091
    Abstract: 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: Grant
    Filed: January 30, 2020
    Date of Patent: September 13, 2022
    Assignees: KYODO YUSHI CO., LTD., KAO CORPORATION
    Inventors: Tatsuya Miyazaki, Yuta Kanazawa, Tomonobu Komoriya, Hiroyuki Ishikawa, Yuta Sato
  • Patent number: 11421176
    Abstract: 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: Grant
    Filed: September 28, 2016
    Date of Patent: August 23, 2022
    Assignees: 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
  • Publication number: 20220112440
    Abstract: 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: Application
    Filed: January 21, 2020
    Publication date: April 14, 2022
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KYODO YUSHI CO., LTD.
    Inventors: Junichi SUDO, Hiroyuki ARAI, Youji KANEHARA, Koushi YAMADA, Ko TANIMURA, Tomonobu KOMORIYA
  • Publication number: 20220064559
    Abstract: 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: Application
    Filed: January 30, 2020
    Publication date: March 3, 2022
    Applicants: KAO CORPORATION, KYODO YUSHI CO., LTD.
    Inventors: Tatsuya MIYAZAKI, Yuta KANAZAWA, Tomonobu KOMORIYA, Hiroyuki ISHIKAWA, Yuta SATO
  • Publication number: 20220017836
    Abstract: 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: Application
    Filed: November 21, 2019
    Publication date: January 20, 2022
    Applicant: KYODO YUSHI CO., LTD.
    Inventors: Kazuki ISA, Yuki TAKEYAMA, Yuta SATO
  • Patent number: 11162051
    Abstract: 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: Grant
    Filed: August 4, 2017
    Date of Patent: November 2, 2021
    Assignee: KYODO YUSHI CO., LTD.
    Inventors: Iwaki Hirooka, Yuta Sato, Masatoshi Ijima
  • Patent number: 11155766
    Abstract: 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: Grant
    Filed: July 26, 2017
    Date of Patent: October 26, 2021
    Assignee: KYODO YUSHI CO., LTD.
    Inventors: Ryosuke Saito, Yuta Sato, Iwaki Hirooka
  • Publication number: 20210324294
    Abstract: 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: Application
    Filed: April 14, 2021
    Publication date: October 21, 2021
    Applicants: KYODO YUSHI CO., LTD., DENSO CORPORATION
    Inventors: Takahiro NIHIRA, Chiemi NAKAYAMA, Daisuke TSUTSUI, Shozo IKEJIMA, Ryuji AOKI, Takahiro NOZU
  • Patent number: 11066621
    Abstract: The present invention provides a lubricating oil composition not containing ZnDTP but comprising: (a) a base oil; (b) molybdenum dialkyldithiocarbamate; and (c) an organic acid metal salt compound having a metal of Group 8 of a short periodic table, copper, or bismuth as a central metal.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: July 20, 2021
    Assignee: KYODO YUSHI CO., LTD.
    Inventors: Takafumi Shimizu, Takahiro Nihira