Patents by Inventor Fumiaki Kasahara
Fumiaki Kasahara 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: 20230159806Abstract: A seal rubber composition contains a carboxyl group-containing acrylic rubber, silica, and two or more inorganic fibers, an amount of the silica per 100 parts by weight of the carboxyl group-containing acrylic rubber is 25 to 100 parts by weight, and a total amount of the inorganic fibers per 100 parts by weight of the carboxyl group-containing acrylic rubber is 35 to 100 parts by weight. A sealing member includes a sliding portion composed of a vulcanized product of the seal rubber composition.Type: ApplicationFiled: September 20, 2022Publication date: May 25, 2023Applicants: KOYO SEALING TECHNO CO., LTD., JTEKT CORPORATIONInventors: Katsuhiko KUSUNOKI, Fumiaki KASAHARA
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Patent number: 10377932Abstract: A sealing rubber composition includes acrylic rubber, artificial graphite, and coupling agent.Type: GrantFiled: July 29, 2016Date of Patent: August 13, 2019Assignees: JTEKT CORPORATION, KOYO SEALING TECHNO CO., LTD.Inventors: Takeshi Kawabayashi, Fumiaki Kasahara, Katsuhiko Kusunoki
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Publication number: 20170051123Abstract: A sealing rubber composition includes acrylic rubber, artificial graphite, and coupling agent.Type: ApplicationFiled: July 29, 2016Publication date: February 23, 2017Applicants: JTEKT CORPORATION, KOYO SEALING TECHNO CO., LTD.Inventors: Takeshi KAWABAYASHI, Fumiaki KASAHARA, Katsuhiko KUSUNOKI
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Patent number: 8039423Abstract: Disclosed are a lubricant composition including a lubricating base oil, fine particles and a calcium sulfonate-based thickener, a speed reduction gear filled with the lubricant composition, and an electric power steering apparatus including the speed reduction gear. The invention reduces operating noise of the speed reduction gear, regardless of the amount of backlash that occurs on combining a small gear and a large gear and without a more complicated structure for the speed reduction gear, by action of the fine particles. Further, separation of oil is prevented, by action of the calcium sulfonate-based thickener of the lubricant composition, so that electric power steering apparatus noise within the inside of a car is reduced at a low cost.Type: GrantFiled: March 23, 2005Date of Patent: October 18, 2011Assignees: JTEKT Corporation, Kyodo Yushi Co., Ltd.Inventors: Kouji Kitahata, Fumiaki Kasahara, Yoshimasa Shirai, Takashi Okaniwa, Satoshi Yamazaki
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Patent number: 7741256Abstract: A lubricant composition contains poly-?-olefin oil having a kinematic viscosity of 1500 to 13000 mm 2/s (40° C.) as a base oil and from 45 to 50% by weight of a thickener composed of polytetrafluoroethylene. The lubricant composition may be used for lubricating an expandable shaft having a pair of shaft members filled with the lubricant composition to prevent stick-slip from occurring when a high surface pressure is applied thereto, thereby allowing consistent maintenance of good lubricating performance. Such an expandable shaft may be incorporated advantageously into a steering system as an intermediate shaft into an area between a steering shaft and a rack-and-pinion mechanism.Type: GrantFiled: March 8, 2007Date of Patent: June 22, 2010Assignee: JTEKT CorporationInventors: Fumiaki Kasahara, Satoshi Kakutani, Kazuto Minagawa
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Publication number: 20090283353Abstract: A novel lubricant composition is provided, which is free from an increase in consistency, separation of its lubricant base oil, and leakage of the separated lubricant base oil from a speed reduction gear or the like even if a stress is repeatedly applied to the composition over a long period of time. A speed reduction gear employing the lubricant composition, and an electric power steering apparatus are also provided. The lubricant composition employs at least two types of thickeners including lithium stearate in combination, and has a worked penetration of not less than 355 (at 25° C.). The speed reduction gear 50 is filled with the lubricant composition containing minute particles, and the electric power steering apparatus includes the speed reduction gear.Type: ApplicationFiled: November 17, 2006Publication date: November 19, 2009Applicant: JTEKT CORPORATIONInventors: Kouji Kitahata, Fumiaki Kasahara, Yoshimasa Shirai
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Patent number: 7452850Abstract: Disclosed are a lubricant composition obtained by adding a buffer particles having an average particle diameter D1 of 50 ?m<D1?300 ?m to a lubricant, a speed reduction gear filled with the lubricant composition, and an electric power steering apparatus having the speed reduction gear incorporated therein, and noise produced in the speed reduction gear can be made lower than ever before irrespective of the magnitude of backlash in a case where a worm and a worm wheel are combined with each other and without complicating the configuration of the speed reduction gear by the buffer action of the buffer particles added to the lubricant composition, thereby making it possible to reduce noise produced in an automobile caused by the electric power steering apparatus at low cost.Type: GrantFiled: September 25, 2003Date of Patent: November 18, 2008Assignee: Jtekt CorporationInventors: Kouji Kitahata, Fumiaki Kasahara, Naoki Uchida, Noritake Ookawa, Hiroaki Murakami
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Publication number: 20070264077Abstract: Provided are a spline joint (1) where a section at which a male spline shaft (2) and a female spline shaft (3) mesh is filled with a lubricating agent composition containing a lubricating oil and buffer particles (B), and the lubricating agent composition. Impact caused by meshing of both spline shafts (2, 3) is buffered by the buffer particles (B) placed in the section at which both spline shafts (2, 3) mesh. As a result, chattering sound and sliding resistance can be stably reduced for a longer time without having wearing and peeling which occur in coating.Type: ApplicationFiled: June 27, 2005Publication date: November 15, 2007Applicant: JTEKT CorporationInventors: Kouji Kitahata, Fumiaki Kasahara, Yoshimasa Shirai
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Publication number: 20070209863Abstract: A lubricant composition contains a base oil having a kinematic viscosity of 1500 to 13000 mm2/s (40° C.) and polytetrafluoroethylene serving as a thickener, and is used for lubricating an expandable shaft to prevent stick-slip from occurring when a high surface pressure is applied thereto, thereby allowing to maintain a good lubricating performance consistently. The expandable shaft 5 has a pair of shaft members 51 and 52 filled with the lubricant composition. In a steering system 1, the expandable shaft 5 is incorporated as an intermediate shaft into an area between a steering shaft 3 and a rack-and-pinion mechanism A.Type: ApplicationFiled: March 8, 2007Publication date: September 13, 2007Applicant: JTEKT CorporationInventors: Fumiaki Kasahara, Satoshi Kakutani, Kazuto Minagawa
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Publication number: 20070180944Abstract: A lubricant composition comprising a lubricating base oil, fine particles and a calcium sulfonate-based thickener, a speed reduction gear filled with the lubricant composition, and an electric power steering apparatus comprising the speed reduction gear are disclosed. It is possible to reduce the operating noise of a speed reduction gear regardless of the amount of backlash that occurs on combining a small gear and a large gear without a more complicate structure of the speed reduction gear by an action of the fine particles while preventing separation of oil by an action of the calcium sulfonate-based thickener added to the lubricant composition, and thus the noise in the inside of car generated by the electric power steering apparatus can be reduced with a low cost.Type: ApplicationFiled: March 23, 2005Publication date: August 9, 2007Inventors: Kouji Kitahata, Fumiaki Kasahara, Yoshimasa Shirai, Takashi Okaniwa, Satoshi Yamazaki
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Patent number: 7215110Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: GrantFiled: June 10, 2005Date of Patent: May 8, 2007Assignees: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi
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Publication number: 20060058201Abstract: Disclosed are a lubricant composition obtained by adding a buffer particles having an average particle diameter D1 of 50 ?m<D1?300 ?m to a lubricant, a speed reduction gear filled with the lubricant composition, and an electric power steering apparatus having the speed reduction gear incorporated therein, and noise produced in the speed reduction gear can be made lower than ever before irrespective of the magnitude of backlash in a case where a worm and a worm wheel are combined with each other and without complicating the configuration of the speed reduction gear by the buffer action of the buffer particles added to the lubricant composition, thereby making it possible to reduce noise produced in an automobile caused by the electric power steering apparatus at low cost.Type: ApplicationFiled: September 25, 2003Publication date: March 16, 2006Applicant: Koyo Seiko Co., LtdInventors: Kouji Kitahata, Fumiaki Kasahara, Naoki Uchida, Noritake Ookawa, Hiroaki Murakami
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Publication number: 20050242514Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: ApplicationFiled: June 10, 2005Publication date: November 3, 2005Applicants: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi
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Publication number: 20040233072Abstract: An annular elastic magnetic body 3 as the magnetic member for a rotation detector contains hydrogenated nitrile rubber as base material and not more than 90 weight percent strontium-based ferrite as a magnetism imparting component. Therefore, the annular elastic magnetic body 3 has no cracks in a thermal shock test (with thermal shock between −40° C. and 150° C.) and resists harsh conditions on operating temperature. The magnetic member contains not less than 80 weight percent the strontium-based ferrite and therefore ensures a magnetic flux density required for a rotation detector. Thus, the magnetic member for a rotation detector is resistant to harsh conditions on operating temperature and has a stable magnetic property.Type: ApplicationFiled: July 20, 2004Publication date: November 25, 2004Inventors: Naoki Morimura, Fumiaki Kasahara, Tomomitsu Tamura, Eiji Namira
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Publication number: 20030059140Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: ApplicationFiled: November 8, 2002Publication date: March 27, 2003Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi
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Patent number: 6520683Abstract: A seal ring attached to a shoulder portion of a bearing ring of a rolling bearing, and including an annular body, a pulsar ring bonded to a required position of the annular body by vulcanization forming, a first lip made of magnetized rubber and formed integrally with one surface of the pulsar ring and a second lip bonded to the other surface of the pulsar ring by vulcanization molding.Type: GrantFiled: June 5, 2001Date of Patent: February 18, 2003Assignees: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Tomomitsu Tamura
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Patent number: 6499885Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: GrantFiled: May 30, 2001Date of Patent: December 31, 2002Assignees: Koyo Seiko Co., Ltd., Koyo Sealing Techno Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi
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Publication number: 20020018606Abstract: A seal ring has an annular body which is constituted so that a disc section extended to a radially inward direction is overlapped with one end of a cylindrical section, and a sensor member for detecting rotation of an inner ring is provided to an outer periphery of the cylindrical section, and an outer case for covering the sensor member is provided by insert-forming. The outer case contracts after it is formed and is press-contact with the cylindrical section so that a gap is hardly generated.Type: ApplicationFiled: May 30, 2001Publication date: February 14, 2002Applicant: Koyo Seiko Co., Ltd.Inventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Shinichi Obayashi
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Publication number: 20010051010Abstract: A seal ring attached to a shoulder portion of a bearing ring of a rolling bearing, and including an annular body, a pulsar ring bonded to a required position of the annular body by vulcanization forming, a first lip made of magnetized rubber and formed integrally with one surface of the pulsar ring and a second lip bonded to the other surface of the pulsar ring by vulcanization molding.Type: ApplicationFiled: June 5, 2001Publication date: December 13, 2001Applicant: Koyo Seiko Co., LtdInventors: Kazutoshi Toda, Minoru Sentoku, Hirokazu Arai, Fumiaki Kasahara, Tomomitsu Tamura