Patents by Inventor Aya Aoki
Aya Aoki 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: 10138440Abstract: A shock absorber oil composition of the invention includes a base oil: (A) at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; (B) an amide compound; and (C) a primary amine.Type: GrantFiled: February 8, 2016Date of Patent: November 27, 2018Assignee: IDEMITSU KOSAN CO., LTD.Inventor: Aya Aoki
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Patent number: 9745534Abstract: A shock absorber oil composition of the invention includes a base oil: (A) at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; (B) an amide compound; and (C) an N-substituted derivative of sarcosine.Type: GrantFiled: February 3, 2016Date of Patent: August 29, 2017Assignee: IDEMITSU KOSAN CO., LTD.Inventor: Aya Aoki
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Patent number: 9745536Abstract: The lubricating oil composition for a shock absorber of the present invention contains (A) a base oil composed of a mineral oil and/or a synthetic oil, (B) a tertiary amine represented by the following general formula (I), and (C) a zinc dithiophosphate represented by the following general formula (II): wherein R1 and R2 each independently represent an aliphatic hydrocarbon group having from 1 to 5 carbon atoms, and R3 represents an aliphatic hydrocarbon group having from 12 to 24 carbon atoms in the general formula (I), wherein R4 to R7 each independently represent one selected from an alkyl group and an alkenyl group each having 1 to 24 carbon atoms in the general formula (II).Type: GrantFiled: August 25, 2014Date of Patent: August 29, 2017Assignee: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi Sakanoue, Aya Aoki
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Patent number: 9695379Abstract: Provided is a lubricating oil composition for a shock absorber excellent in thermal stability and capable of reducing the friction factor for rubber. The lubricating oil composition for a shock absorber contains (A) a base oil composed of a mineral oil and/or a synthetic oil, (B) a zinc dithiophosphate represented by the following general formula (I), (C) a fatty acid amide and (D) a polyalcohol ester. In the formula, R1 to R4 each independently represent at least one selected from a linear, branched or cyclic alkyl group having from 6 to 20 carbon atoms and a linear, branched or cyclic alkenyl group having from 6 to 20 carbon atoms.Type: GrantFiled: August 25, 2014Date of Patent: July 4, 2017Assignee: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi Sakanoue, Aya Aoki
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Patent number: 9688941Abstract: Provided is a lubricating oil composition for a shock absorber, which realizes excellent riding comfort in low-temperature and high-temperature environments and can suppress worsening of riding comfort with time, which is caused by evaporation and shearing of the lubricating oil. The lubricating oil composition for a shock absorber contains (A) a base oil having a pour point of lower than ?40° C. and a kinematic viscosity at 80° C. of from 2.0 to 2.7 mm2/s, (B-1) from 1 to 15% by mass of a polymethacrylate having a weight-average molecular weight of from 10,000 to less than 100,000, and (B-2) from 0.1 to 5% by mass of a polymethacrylate having a weight-average molecular weight of from 100,000 to 200,000.Type: GrantFiled: August 25, 2014Date of Patent: June 27, 2017Assignee: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi Sakanoue, Aya Aoki
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Patent number: 9458405Abstract: A lubricating oil composition includes: a base oil; a component (A) that is a dialkyl hydrogen phosphite; a component (B) that is a sulfur antioxidant; and a component (C) that is a polyalkenyl succinimide. Since the lubricating oil composition of the invention exhibits an excellent lubricity to both iron metal and copper metal and an excellent heat stability, the lubricating oil composition of the invention is suitable for a shock absorber of an automobiles and the like.Type: GrantFiled: August 19, 2013Date of Patent: October 4, 2016Assignee: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi Sakanoue, Aya Aoki
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Publication number: 20160230114Abstract: A shock absorber oil composition of the invention includes a base oil: (A) at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; (B) an amide compound; and (C) a primary amine.Type: ApplicationFiled: February 8, 2016Publication date: August 11, 2016Applicant: IDEMITSU KOSAN CO., LTD.Inventor: Aya AOKI
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Publication number: 20160194576Abstract: Provided is a lubricating oil composition for a shock absorber excellent in thermal stability and capable of reducing the friction factor for rubber. The lubricating oil composition for a shock absorber contains (A) a base oil composed of a mineral oil and/or a synthetic oil, (B) a zinc dithiophosphate represented by the following general formula (I), (C) a fatty acid amide and (D) a polyalcohol ester. In the formula, R1 to R4 each independently represent at least one selected from a linear, branched or cyclic alkyl group having from 6 to 20 carbon atoms and a linear, branched or cyclic alkenyl group having from 6 to 20 carbon atoms.Type: ApplicationFiled: August 25, 2014Publication date: July 7, 2016Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi SAKANOUE, Aya AOKI
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Publication number: 20160194578Abstract: Provided is a lubricating oil composition for a shock absorber, which realizes excellent riding comfort in low-temperature and high-temperature environments and can suppress worsening of riding comfort with time, which is caused by evaporation and shearing of the lubricating oil. The lubricating oil composition for a shock absorber contains (A) a base oil having a pour point of lower than ?40° C. and a kinematic viscosity at 80° C. of from 2.0 to 2.7 mm2/s, (B-1) from 1 to 15% by mass of a polymethacrylate having a weight-average molecular weight of from 10,000 to less than 100,000, and (B-2) from 0.1 to 5% by mass of a polymethacrylate having a weight-average molecular weight of from 100,000 to 200,000.Type: ApplicationFiled: August 25, 2014Publication date: July 7, 2016Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi SAKANOUE, Aya AOKI
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Publication number: 20160186090Abstract: The lubricating oil composition for a shock absorber of the present invention contains (A) a base oil composed of a mineral oil and/or a synthetic oil, (B) a tertiary amine represented by the following general formula (I), and (C) a zinc dithiophosphate represented by the following general formula (II): wherein R1 and R2 each independently represent an aliphatic hydrocarbon group having from 1 to 5 carbon atoms, and R3 represents an aliphatic hydrocarbon group having from 12 to 24 carbon atoms in the general formula (I), wherein R4 to R7 each independently represent one selected from an alkyl group and an alkenyl group each having 1 to 24 carbon atoms in the general formula (II).Type: ApplicationFiled: August 25, 2014Publication date: June 30, 2016Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi SAKANOUE, Aya AOKI
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Publication number: 20160152918Abstract: A shock absorber oil composition of the invention includes a base oil: (A) at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; (B) an amide compound; and (C) an N-substituted derivative of sarcosine.Type: ApplicationFiled: February 3, 2016Publication date: June 2, 2016Applicant: IDEMITSU KOSAN CO., LTD.Inventor: Aya AOKI
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Publication number: 20150240182Abstract: A lubricating oil composition includes: a base oil; a component (A) that is a dialkyl hydrogen phosphite; a component (B) that is a sulfur antioxidant; and a component (C) that is a polyalkenyl succinimide. Since the lubricating oil composition of the invention exhibits an excellent lubricity to both iron metal and copper metal and an excellent heat stability, the lubricating oil composition of the invention is suitable for a shock absorber of an automobiles and the like.Type: ApplicationFiled: August 19, 2013Publication date: August 27, 2015Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi Sakanoue, Aya Aoki
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Publication number: 20150184107Abstract: To provide a shock absorber lubricating oil composition which realizes such a lubricity between rubber and chromium; i.e., materials generally employed in oil seals and piston rods of shock absorbers, that the low-speed-side friction coefficient is low; the high-speed-side friction coefficient is high; and the ratio of the low-speed-side friction coefficient to the high-speed-side friction coefficient is small. The shock absorber lubricating oil composition includes (A) a base oil composed of a mineral oil and/or a synthetic oil, and (B) a dithiophosphate ester represented by formula (1).Type: ApplicationFiled: July 11, 2013Publication date: July 2, 2015Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Shuichi Sakanoue, Aya Aoki
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Publication number: 20150018257Abstract: A shock absorber oil composition of the invention includes a base oil: (A) at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; (B) an amide compound; and (C) an N-substituted derivative of sarcosine.Type: ApplicationFiled: December 13, 2012Publication date: January 15, 2015Applicant: IDEMITSU KOSAN CO., LTD.Inventor: Aya Aoki
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Publication number: 20140378358Abstract: A shock absorber oil composition of the invention includes a base oil: (A) at least one of phosphate, amine phosphate salt, phosphite and amine phosphite salt; (B) an amide compound; and (C) a primary amine.Type: ApplicationFiled: December 13, 2012Publication date: December 25, 2014Applicant: IDEMITSU KOSAN CO., LTD.Inventor: Aya Aoki