Patents by Inventor Akihiko Shimura
Akihiko Shimura 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: 20230250355Abstract: A lubricant composition containing a base oil, an alkyl benzene sulfonate metal salt, and an alkyl naphthalene sulfonate metal salt, wherein a total content of the alkyl benzene sulfonate metal salt and the alkyl naphthalene sulfonate metal salt is 1 to 2.2% by mass, and a mass fraction of the alkyl benzene sulfonate metal salt to a total mass of the alkyl benzene sulfonate metal salt and the alkyl naphthalene sulfonate metal salt is 0.3 or more.Type: ApplicationFiled: June 3, 2021Publication date: August 10, 2023Applicant: NOK KLUEBER CO., LTD.Inventors: Akihiko SHIMURA, Toshio NITTA, Keita NAKASHI
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Patent number: 10633612Abstract: A lubricant composition includes a base oil and melamine cyanurate. The base oil includes a perfluoropolyether oil having a straight chain structure. The lubricant composition is for one of a resin-resin sliding section and a resin-metal sliding section. A melamine cyanurate content is within a range of 1-20% by mass with respect to a sum of the base oil and melamine cyanurate.Type: GrantFiled: May 4, 2016Date of Patent: April 28, 2020Assignee: NOK Klueber Co., Ltd.Inventors: Akihiko Shimura, Yoshihito Tani, Toshio Nitta
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Publication number: 20160244690Abstract: A lubricant composition includes a base oil and melamine cyanurate. The base oil includes a perfluoropolyether oil having a straight chain structure. The lubricant composition is for one of a resin-resin sliding section and a resin-metal sliding section. A melamine cyanurate content is within a range of 1-20% by mass with respect to a sum of the base oil and melamine cyanurate.Type: ApplicationFiled: May 4, 2016Publication date: August 25, 2016Inventors: Akihiko Shimura, Yoshihito Tani, Toshio Nitta
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Publication number: 20140038865Abstract: A lubricant composition includes a base oil and melamine cyanurate. The base oil includes a perfluoropolyether oil having a straight chain structure. The lubricant composition is for one of a resin-resin sliding section and a resin-metal sliding section. A melamine cyanurate content is within a range of 1-20% by mass with respect to a sum of the base oil and melamine cyanurate.Type: ApplicationFiled: September 16, 2011Publication date: February 6, 2014Applicant: NOK Klueber Co., Ltd.Inventors: Akihiko Shimura, Yoshihito Tani, Toshio Nitta
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Patent number: 8492320Abstract: A lubricant composition which is suitable as a fluorine oil, fluorine grease, and which is excellent in stabilizability, as well as a lubricant composition which is suitable as a fluorine oil, fluorine grease, and which has excellent rust prevention properties while keeping a heat resistance.Type: GrantFiled: June 28, 2012Date of Patent: July 23, 2013Assignee: NOK Klueber Co., Ltd.Inventors: Tetsuhiro Miyamoto, Akihiko Shimura, Toshio Nitta, Jiro Yurimoto
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Patent number: 8470748Abstract: Disclosed is an electroconductive grease comprising a fluorine oil, an electroconductive material, and a thickening agent, the electroconductive grease containing 5 to 20 wt. % of carbon black having a DBP oil absorption amount of 250 ml/100 g or less as the electroconductive material, and 2 to 15 wt. % of fluorine-containing resin particles having an average primary particle size of 1.0 ?m or less as the thickening agent. The electroconductive grease comprises carbon black having specific properties, and fluorine-containing resin particles, preferably PTFE particles, having an average primary particle size of 1.0 ?m or less, and therefore exhibits excellent oil separation characteristics, namely, a remarkably lower degree of oil separation, which can also be reduced to 10 wt. % or less.Type: GrantFiled: June 26, 2009Date of Patent: June 25, 2013Assignee: NOK Klueber Co., Ltd.Inventors: Akihiko Shimura, Yoshihito Tani, Toshio Nitta
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Publication number: 20120264663Abstract: A lubricant composition which is suitable as a fluorine oil, fluorine grease, and which is excellent in stabilizability, as well as a lubricant composition which is suitable as a fluorine oil, fluorine grease, and which has excellent rust prevention properties while keeping a heat resistance.Type: ApplicationFiled: June 28, 2012Publication date: October 18, 2012Inventors: Tetsuhiro MIYAMOTO, Akihiko Shimura, Toshio Nitta, Jiro Yurimoto
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Patent number: 8247361Abstract: A fluorine-based lubricant composition comprising a base oil and a fluorine-containing compound represented by the general formula: CF3(CF2)n O(CF2O)p(C2F4O)q(C3F6O)rRfCONHAr (wherein, Ar is a 2-benzimidazole group, Rf is a fluorocarbon group of carbon number of from 1 or 2, n is 0, 1 or 2, p, q and r are an integer satisfying the condition p+q+r?100, where one or two of p, q and r may be 0, and the CF2O group, the CF2O4 group and the C3F6O group are the groups bound randomly in the main chain) as an additive containing in the base oil. The fluorine-based lubricant composition has an improved long term anti-rust property and thermal resistance property, and further the fluorine-based lubricant composition obtained by adding a thickening agent to the composition reduces abrasion of the sliding member such as electric contact having a noble metal surface including a gold or silver plating surface, a copper surface and a copper alloy surface.Type: GrantFiled: April 21, 2010Date of Patent: August 21, 2012Assignee: NOK Kluber Co., Ltd.Inventors: Akihiko Shimura, Ayumi Yamazaki, I, Wataru Sawaguchi, Masaki Tahara, Yoshihito Tani, Toshio Nitta
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Patent number: 8067344Abstract: A lubricating grease composition, which comprises a base oil consisting of a mixture of 100 parts by weight of at least one of a perfluoropolyether oil (A), represented by RfO[CF(CF3)CF2O]p(CF2CF2O)qRf (where Rf is a perfluoroalkyl group having 1-5 carbon atoms, p+q=2-200, q/p=0-2, and q may be 0), and a perfluoropolyether oil (B), represented by F(CF2CF2CF2O)sC2F5 (where s=2-100), and 0-100 parts by weight of at least one of a perfluoropolyether oil (C), represented by RfO(CF2CF2O)m(CF2O)nRf (where m+n=3-200 and m:n=10-90:90-10), and a perfluoropolyether oil (D), represented by RfO[CF(CF3)CF2O]a(CF2CF3O)b(CF2O)cRf (where a+b+c=3-200, b is 0 or an integer of 1 or more, and c is an integer of 1 or more), preferably further admixed with a thickening agent, can suppress corrosion of metallic materials by corrosive gases and also has a good heat resistance.Type: GrantFiled: April 19, 2010Date of Patent: November 29, 2011Assignee: NOK Kluber Co., Ltd.Inventors: Akihiko Shimura, Tetsuhiro Kitahara, Tatsuya Hashimoto
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Patent number: 8044003Abstract: A grease composition, which comprises (A) a perfluoropolyether base oil, (B) a thickener, and (C) barium sulfate and/or antimony oxide, where 0.1-50% by weight of the component (B) and 1-25% by weight of the component (C) are contained, has a distinguished effect on improvements of abrasion resistance, friction characteristics, load durability, high-temperature durability and corrosion resistance without any deterioration of heat resistance by adding at least one of barium sulfate and antimony oxide, each having an average primary particle size of 0.1-20 ?m, as component (C).Type: GrantFiled: October 26, 2006Date of Patent: October 25, 2011Assignee: NOK Kluber Co., Ltd.Inventors: Tetsuhiro Miyamoto, Akihiko Shimura, Tetsuhiro Kitahara, Jiro Yurimoto
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Publication number: 20110111993Abstract: Disclosed is an electroconductive grease comprising a fluorine oil, an electroconductive material, and a thickening agent, the electroconductive grease containing 5 to 20 wt. % of carbon black having a DBP oil absorption amount of 250 ml/100 g or less as the electroconductive material, and 2 to 15 wt. % of fluorine-containing resin particles having an average primary particle size of 1.0 ?m or less as the thickening agent. The electroconductive grease comprises carbon black having specific properties, and fluorine-containing resin particles, preferably PTFE particles, having an average primary particle size of 1.0 ?m or less, and therefore exhibits excellent oil separation characteristics, namely, a remarkably lower degree of oil separation, which can also be reduced to 10 wt. % or less.Type: ApplicationFiled: June 26, 2009Publication date: May 12, 2011Applicant: NOK KLUBER CO., LTD.Inventors: Akihiko Shimura, Yoshihito Tani, Toshio Nitta
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Publication number: 20100305012Abstract: A lubricant composition which is suitable as a fluorine oil, fluorine grease, and which is excellent in stabilizability, as well as a lubricant composition which is suitable as a fluorine oil, fluorine grease, and which has an excellent rust prevention property while keeping a heat resistance.Type: ApplicationFiled: January 30, 2009Publication date: December 2, 2010Applicant: NOK Klueber Co., Ltd.Inventors: Tetsuhiro Miyamoto, Akihiko Shimura, Toshio Nitta, Jiro Yurimoto
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Publication number: 20100267597Abstract: A fluorine-based lubricant composition comprising a base oil and a fluorine-containing compound represented by the general formula: CF3(CF)n(CF2O)p(C2F4O)q(C3F6O)rRfCONHAr (wherein, Ar is a 2-benzimidazole group, Rf is a fluorocarbon group of carbon number of from 1 or 2, n is 0, 1 or 2, p, q and r are an integer satisfying the condition p+q+r?100, where one or two of p, q and r may be 0, and the CF2O group, the CF2O4 group and the C3F6O group are the groups bound randomly in the main chain) as an additive containing in the base oil. The fluorine-based lubricant composition has an improved long term anti-rust property and thermal resistance property, and further the fluorine-based lubricant composition obtained by adding a thickening agent to the composition reduces abrasion of the sliding member such as electric contact having a noble metal surface including a gold or silver plating surface, a copper surface and a copper alloy surface.Type: ApplicationFiled: April 21, 2010Publication date: October 21, 2010Applicant: NOK KLUBER CO., LTD.Inventors: Akihiko SHIMURA, Ayumi YAMAZAKI, I, Wataru SAWAGUCHI, Masaki TAHARA, Yoshihito TANI, Toshio NITTA
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Publication number: 20100256027Abstract: A grease composition, which comprises (A) a perfluoropolyether base oil, (B) a thickener, and (C) barium sulfate and/or antimony oxide, where 0.1-50% by weight of the component (B) and 1-25% by weight of the component (C) are contained, has a distinguished effect on improvements of abrasion resistance, friction characteristics, load durability, high-temperature durability and corrosion resistance without any deterioration of heat resistance by adding at least one of barium sulfate and antimony oxide, each having an average primary particle size of 0.1-20 ?m, as component (C).Type: ApplicationFiled: October 26, 2006Publication date: October 7, 2010Applicant: NOK KLUBER CO., LTD.Inventors: Tetsuhiro Miyamoto, Akihiko Shimura, Tetsuhiro Kitahara, Jiro Yurimoto
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Patent number: 7709424Abstract: A lubricating oil composition, which comprises a perfluoropolyether base oil, and a fluorine-containing polyether diphosphonic acid ester, represented by the following general formula: (R2O)(R1O)P(O)(CH2)aCF(CF3)[OCF2CF(CF3)]bO(CF2)cO[CF(CF3)CF2O]dCF(CF3)(CH2)eP(O)(OR3)(OR4) (where R1, R2, R3, and R4 are hydrogen atoms, alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, aralkyl groups, or any of the foregoing groups can be halogen atom-substituted groups, subscripts a, b, c, d, and e are in conditions of 2?a+e?8, b+d?28, and 1?c?10, and b and d can be 0), and a grease composition which further contains a thickening agent in addition to the lubricating oil composition, have distinguished abrasion resistance and rust preventiveness without deteriorating the heat resistance inherent in the lubricating oil and the grease containing a perfluoropolyether oil as a base oil.Type: GrantFiled: November 24, 2005Date of Patent: May 4, 2010Assignee: NOK Kluber Co., Ltd.Inventors: Akihiko Shimura, Tatsuya Hashimoto
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Publication number: 20080167208Abstract: A lubricant in the form of lubricating oil or grease, for use in contact with graphite or molybdenum disulfide or in contact with aluminum materials, which comprises a perfluoropolyether oil free from (CF2O)n groups as a repeat unit of polymer and having a kinetic viscosity at 40° C. of 50-1,500 mm2/sec., as a base oil, where F(CF2CF2CF2O)mC2F5 or RfO[CF(CF3)CF2O]p(CF2CF2O)qRf? s used as the perfluoropolyether base oil. The lubricant undergoes no considerable deterioration of high-temperature characteristics (high-temperature durability), even if used in various uses as mentioned above, and also has distinguished low-temperature characteristics when the base oil has a kinetic viscosity of 50-250 mm2/sec.Type: ApplicationFiled: February 17, 2006Publication date: July 10, 2008Inventors: Miyuki Hashida, Wataru Sawaguchi, Toshio Nitta, Tatsuya Hashimoto, Akihiko Shimura, Jiro Yurimoto
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Publication number: 20070298988Abstract: A lubricating oil composition, which comprises a perfluoropolyether base oil, and a fluorine-containing polyether diphosphonic acid ester, represented by the following general formula: (R2O)(R1O)P(O)(CH2)aCF(CF3) [OCF2CF(CF3)]bO(CF2)cO [CF(CF3)CF2O]dCF(CF3)(CH2)eP(O)(OR3)(OR4) (where R1, R2, R3, and R4 are hydrogen atoms, alkyl groups, cycloalkyl groups, aryl groups, alkylaryl groups, aralkyl groups, or any of the foregoing groups can be halogen atom-substituted groups, subscripts a, b, c, d, and e are in conditions of 2?a+e?8, b+d?28, and 1?c?10, and b and d can be 0), and a grease composition which further contains a thickening agent in addition to the lubricating oil composition, have distinguished abrasion resistance and rust preventiveness without deteriorating the heat resistance inherent in the lubricating oil and the grease containing a perfluoropolyether oil as a base oil.Type: ApplicationFiled: November 24, 2005Publication date: December 27, 2007Inventors: Akihiko Shimura, Tatsuya Hashimoto
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Publication number: 20070274727Abstract: A communications system implementing high-speed, high-quality communication in an oblong communication range such as mobile communication, and a leaky optical fiber preferably used in such communications system are provided. An optical fiber (2) is a GI-type optical fiber having a core structured such that the refractive index at the center is large, gradually decreasing as it approaches the periphery, and may have scatterers mixed therein. When modulated light enters the optical fiber (2) from a transmitter (1), the modulated light proceeds through the optical fiber (2) while a part of the light leaks from the side thereof. A receiver (3) receives this leaked light, and demodulates it so as to obtain data. Since the optical fiber (2) is a GI type, high-speed, high-quality mobile communication is possible with little waveform deformation.Type: ApplicationFiled: March 4, 2005Publication date: November 29, 2007Applicant: Nakagawa Laboratories, Inc.Inventors: Shinichiro Haruyama, Yasuo Sugawara, Masao Nakagawa, Yasuhiro Koike, Takaaki Ishigure, Hiromasa Suzuki, Akihiko Shimura
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Publication number: 20070213240Abstract: A lubricating grease composition, which comprises a base oil consisting of a mixture of 100 parts by weight of at least one of a perfluoropolyether oil (A), represented by RfO[CF(CF3)CF2O]p(CF2CF2O)qRf (where Rf is a perfluoroalkyl group having 1-5 carbon atoms, p+q=2-200, q/p=0-2, and q may be 0), and a perfluoropolyether oil (B), represented by F(CF2CF2CF2O)sC2F5 (where s=2-100), and 0-100 parts by weight of at least one of a perfluoropolyether oil (C), represented by RfO(CF2CF2O)m(CF2O)nRf (where m+n=3-200 and m:n=10-90:90-10), and a perfluoropolyether oil (D), represented by RfO[CF(CF3)CF2O]a(CF2CF3O)b(CF2O)cRf (where a+b+c=3-200, b is 0 or an integer of 1 or more, and c is an integer of 1 or more), preferably further admixed with a thickening agent, can suppress corrosion of metallic materials by corrosive gases and also has a good heat resistance.Type: ApplicationFiled: June 20, 2005Publication date: September 13, 2007Inventors: Akihiko Shimura, Tetsuhiro Kitahara, Tatsuya Hashimoto