Patents by Inventor Tetsuhiro Kitahara
Tetsuhiro Kitahara 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: 20140228261Abstract: An aqueous surface-treating agent, which comprises a silicone oil aqueous emulsion, a polyurethane resin aqueous emulsion, and a silane compound represented by the following general formula: (where R1 and R2 each are an alkyl group having 1 to 4 carbon atoms, and n and m are 1?n?3 and m=3?n, respectively), and/or a hydrolyzate thereof; wherein 100 parts by weight or more of the polyurethane resin in terms of the weight of solid matters is used on the basis of 100 parts by weight in terms of nonvolatile matters of silicone oil, can prevent sticking of rubber seal materials such as O rings, etc. themselves or sticking to a metal, a resin, etc., and can reduce the friction of rubber or resin seal members at the time of sliding motion.Type: ApplicationFiled: January 10, 2014Publication date: August 14, 2014Applicants: NOK Corporation, NOK Kluber Co., Ltd.Inventors: Masaki Tahara, Tetsuhiro Kitahara, Toshihiro Higashira, Yoshifumi Kojima
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Publication number: 20140086652Abstract: The present invention provides a fixation member which exhibits enhanced wear resistance and sliding property between the peripheral surface of the fixation member and a pressure member, which can reduce driving torque at a fixation unit, and which does not cause stick slipping even in a high-load operational mode, and a fixation apparatus having the fixation member. The fixation member employed in a fixation unit of the fixation apparatus has a metallic substrate having at least one layer of an electrocast seamless belt, and a slide layer disposed on the inner peripheral surface of the metallic substrate, wherein the slide layer is formed of at least one species of the group consisting of a polyamide-imide resin and a polyimide resin, and a fluororesin; the slide layer has a fluororesin content of 27.5 mass % to 50 mass %; and the slide layer has a surface roughness Ra of 0.4 ?m or less.Type: ApplicationFiled: September 11, 2013Publication date: March 27, 2014Applicants: NOK CORPORATION, SYNZTEC CO., LTD., NOK KLUEBER CO., LTD.Inventors: Shingo SUGIYAMA, Masaya SUZUKI, Akira NISHIDA, Hitoshi OKABE, Tetsuhiro KITAHARA, Yujiro YAMASAKI
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Patent number: 8658722Abstract: An aqueous surface-treating agent, which comprises a silicone oil aqueous emulsion, a polyurethane resin aqueous emulsion, and a silane compound represented by the following general formula (where R1 and R2 each are an alkyl group having 1 to 4 carbon atoms, and n and m are 1?n?3 and m=3·n, respectively), and/or a hydrolyzate thereof, wherein 100 parts by weight or more of the polyurethane resin in terms of the weight of solid matters is used on the basis of 100 parts by weight in terms of nonvolatile matters of silicone oil, can prevent sticking of rubber seal materials such as O rings, etc. themselves or sticking to a metal, a resin, etc., and can reduce the friction of rubber or resin seal members at the time of sliding motion.Type: GrantFiled: July 18, 2008Date of Patent: February 25, 2014Assignees: NOK Klueber Co., Ltd., NOK CorporationInventors: Masaki Tahara, Tetsuhiro Kitahara, Toshihiro Higashira, Yoshifumi Kojima
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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: 20100298182Abstract: 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: April 19, 2010Publication date: November 25, 2010Applicant: NOK KLUBER CO., LTD.Inventors: Akihiko Shimua, Tetsuhiro Kitahara, Tatsuya Hashimoto
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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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Publication number: 20100222475Abstract: An aqueous surface-treating agent, which comprises a silicone oil aqueous emulsion, a polyurethane resin aqueous emulsion, and a silane compound represented by the following general formula (where R1 and R2 each are an alkyl group having 1 to 4 carbon atoms, and n and m are 1?n?3 and m=3·n, respectively), and/or a hydrolyzate thereof, wherein 100 parts by weight or more of the polyurethane resin in terms of the weight of solid matters is used on the basis of 100 parts by weight in terms of nonvolatile matters of silicone oil, can prevent sticking of rubber seal materials such as O rings, etc. themselves or sticking to a metal, a resin, etc., and can reduce the friction of rubber or resin seal members at the time of sliding motion.Type: ApplicationFiled: July 18, 2008Publication date: September 2, 2010Applicants: NOK KLUBER CO., LTD., NOK CORPORATIONInventors: Masaki Tahara, Tetsuhiro Kitahara, Toshihiro Higashira, Yoshifumi Kojima
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Publication number: 20090270292Abstract: A lubricant composition, which comprises a fluoro-oil, a powdery fluororesin thickener, and Ca salt or Na salt of aromatic sulfonic acid or saturated aliphatic dicarboxylic acid as a rust-inhibitive additive, where the thickener is in a proportion of 10-40% by weight, and the additive is in a proportion of 0.3-10% by weight, on the basis of total weight of the composition, the balance being the fluoro-oil. The lubricant composition containing the powdery fluororesin in an appropriate admixing proportion as a thickener in the fluoro oil has a distinguished rust inhibition, particularly even after having being subjected to heat hysteresis, where a perfluoropolyether oil is usually used as a fluoro-oil.Type: ApplicationFiled: March 3, 2006Publication date: October 29, 2009Inventors: Takeshi Nonaka, Toshio Nitta, Tetsuhiro Kitahara, Tatsuya Hashimoto
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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