Patents by Inventor Daisuke Tsutsui
Daisuke Tsutsui 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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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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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: 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
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Patent number: 10584750Abstract: Provided is a grease composition for a wheel bearing, containing (a) a base oil consisting of a mineral oil and a synthetic hydrocarbon oil, wherein the ratio of the synthetic hydrocarbon oil to the total amount of the mineral oil and the synthetic hydrocarbon oil is 40 to 60 mass %, and the base oil has a kinematic viscosity at 40° C. of 40 to 65 mm2/s; (b) a thickener of formula (A) wherein R2 is diphenylmethane, and R1 and R3, which may be the same or different from each other, each represent cyclohexyl group or a straight-chain or branched alkyl group having 16 to 20 carbon atoms, with a molar ratio of the cyclohexyl group to the total number of moles of the cyclohexyl group and the alkyl group being 50 to 90 mol %; (c) an amine type antioxidant; and (d) an amine phosphate type antiwear agent.Type: GrantFiled: March 12, 2015Date of Patent: March 10, 2020Assignees: KYODO YUSHI CO., LTD., NTN CORPORATIONInventors: Yuta Sato, Daisuke Tsutsui, Junichi Imai, Shinsuke Hirano
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Patent number: 10081778Abstract: The invention provides a grease composition for hub unit bearing, having (a) as a base oil a mixture of a hydrocarbon synthetic oil and an ester type synthetic oil, with the content of the ester type synthetic oil being 20 to 50 parts by mass with respect to 100 parts by mass of the total of the hydrocarbon synthetic oil and the ester type synthetic oil, and the base oil having a kinematic viscosity at 40° C. of 20 to 80 mm2/s, and (b) as a thickener a urea compound.Type: GrantFiled: October 30, 2013Date of Patent: September 25, 2018Assignees: KYODO YUSHI CO., LTD., HONDA MOTOR CO., LTD.Inventors: Daisuke Tsutsui, Yuta Sato, Junichi Imai, Morinobu Kawamura
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Patent number: 9695756Abstract: When switching the fuel to be used for engine operation from gasoline to CNG, in a state where CNG is supplied experimentally to one cylinder serving as a judgment object and gasoline is supplied to other cylinders, whether or not CNG can be supplied to the cylinder serving as a judgment object is judged based on an amount of change ?Pc in fuel pressure inside a CNG delivery pipe (Step S13 to Step S16). When it is judged that a gas fuel can be supplied to all cylinders (Step S19: YES), the fuel to be used for engine operation is switched from the liquid fuel to the gas fuel (Step S20).Type: GrantFiled: November 27, 2012Date of Patent: July 4, 2017Assignees: Aisan Kogyo Kabushiki Kaisha, Toyota Jidosha Kabushiki KaishaInventors: Daisuke Tsutsui, Akito Onishi, Takao Komoda
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Publication number: 20170074326Abstract: Provided is a grease composition for a wheel bearing, containing (a) a base oil consisting of a mineral oil and a synthetic hydrocarbon oil, wherein the ratio of the synthetic hydrocarbon oil to the total amount of the mineral oil and the synthetic hydrocarbon oil is 40 to 60 mass %, and the base oil has a kinematic viscosity at 40° C. of 40 to 65 mm2/s; (b) a thickener of formula (A) wherein R2 is diphenylmethane, and R1 and R3, which may be the same or different from each other, each represent cyclohexyl group or a straight-chain or branched alkyl group having 16 to 20 carbon atoms, with a molar ratio of the cyclohexyl group to the total number of moles of the cyclohexyl group and the alkyl group being 50 to 90 mol %; (c) an amine type antioxidant; and (d) an amine phosphate type antiwear agent.Type: ApplicationFiled: March 12, 2015Publication date: March 16, 2017Applicants: Kyodo Yushi Co., Ltd., NTN CorporationInventors: Yuta Sato, Daisuke Tsutsui, Junichi Imai, Shinsuke Hirano
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Publication number: 20150299608Abstract: The invention provides a grease composition for hub unit bearing, having (a) as a base oil a mixture of a hydrocarbon synthetic oil and an ester type synthetic oil, with the content of the ester type synthetic oil being 20 to 50 parts by mass with respect to 100 parts by mass of the total of the hydrocarbon synthetic oil and the ester type synthetic oil, and the base oil having a kinematic viscosity at 40° C. of 20 to 80 mm2/s, and (b) as a thickener a urea compound.Type: ApplicationFiled: October 30, 2013Publication date: October 22, 2015Applicants: HONDA MOTOR CO., LTD., KYODO YUSHI CO., LTD.Inventors: Daisuke TSUTSUI, Yuta SATO, Junichi IMAI, Morinobu KAWAMURA
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Publication number: 20140311460Abstract: When switching the fuel to be used for engine operation from gasoline to CNG, in a state where CNG is supplied experimentally to one cylinder serving as a judgment object and gasoline is supplied to other cylinders, whether or not CNG can be supplied to the cylinder serving as a judgment object is judged based on an amount of change ?Pc in fuel pressure inside a CNG delivery pipe (Step S13 to Step S16). When it is judged that a gas fuel can be supplied to all cylinders (Step S19: YES), the fuel to be used for engine operation is switched from the liquid fuel to the gas fuel (Step S20).Type: ApplicationFiled: November 27, 2012Publication date: October 23, 2014Inventors: Daisuke Tsutsui, Akito Onishi, Takao Komoda
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Publication number: 20140069383Abstract: A bi-fuel engine is selectively operable in a first operation mode that uses liquid fuel and a second operation mode that uses gas fuel. A controller for the engine is configured to start a depressurizing process that supplies at least one of the cylinders with gas fuel as pressure of the gas fuel becomes greater than or equal to an initiation determination value when the engine is operating in the first operation mode.Type: ApplicationFiled: September 10, 2013Publication date: March 13, 2014Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISAN KOGYO KABUSHIKI KAISHAInventors: Daisuke TSUTSUI, Takao KOMODA
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Patent number: 8513171Abstract: A lubricant composition, which is low in friction, does not have an attacking property against polyamide resin, etc., is excellent in heat resistance, and especially does not undergo deterioration or loss of the respective characteristics in a short term when used under a high temperature environment, is provided along with a speed reduction gear and an electric power steering apparatus that use the lubricant composition. The lubricant composition has blended therein a synthetic hydrocarbon oil, a urea thickener, zinc stearate, and a sulfur-based antioxidant. A speed reduction gear has a portion of engagement of a small gear and a large gear filled with the lubricant composition. In an electric power steering apparatus, an output of a steering assisting electric motor is speed reduced and transmitted to a steering mechanism via the speed reduction gear.Type: GrantFiled: October 14, 2009Date of Patent: August 20, 2013Assignees: JTEKT Corporation, Kyodo Yushi Co., Ltd.Inventors: Ryuji Nakata, Miwa Hokii, Mitsuhiro Kakizaki, Daisuke Tsutsui
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Publication number: 20110168479Abstract: A lubricant composition, which is low in friction, does not have an attacking property against polyamide resin, etc., is excellent in heat resistance, and especially does not undergo deterioration or loss of the respective characteristics in a short term when used under a high temperature environment, is provided along with a speed reduction gear and an electric power steering apparatus that use the lubricant composition. The lubricant composition has blended therein a synthetic hydrocarbon oil, a urea thickener, zinc stearate, and a sulfur-based antioxidant. A speed reduction gear has a portion of engagement of a small gear and a large gear filled with the lubricant composition. In an electric power steering apparatus, an output of a steering assisting electric motor is speed reduced and transmitted to a steering mechanism via the speed reduction gear.Type: ApplicationFiled: October 14, 2009Publication date: July 14, 2011Applicants: JTEKT CORPORATION, KYODO YUSHI CO., LTD.Inventors: Ryuji Nakata, Miwa Hokii, Mitsuhiro Kakizaki, Daisuke Tsutsui