Patents by Inventor Hirotoshi Miyajima
Hirotoshi Miyajima 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: 7278332Abstract: A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm2/s in kinematic viscosity at 40° C.Type: GrantFiled: January 16, 2003Date of Patent: October 9, 2007Assignee: NSK Ltd.Inventors: Shinya Nakatani, Masahiko Yamazaki, Hirotoshi Miyajima, Yasuyuki Matsuda
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Publication number: 20070220997Abstract: A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm2/s in kinematic viscosity at 40° C.Type: ApplicationFiled: May 18, 2007Publication date: September 27, 2007Inventors: Shinya Nakatani, Masahiko Yamazaki, Hirotoshi Miyajima, Yasuyuki Matsuda
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Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system
Patent number: 7265080Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.Type: GrantFiled: May 20, 2003Date of Patent: September 4, 2007Assignee: NSK Ltd.Inventors: Kenichi Iso, Hirotoshi Miyajima, Katsuaki Denpou, Yujiro Toda, Masahiko Yamazaki, Michiharu Naka, Yasunobu Fujita -
Publication number: 20070149422Abstract: An object of the present invention is to provide a grease composition for resin lubrication which is capable of keeping good the sliding lubrication between a resin member and a metal member, and between a metal member and another metal member over the long term. The present invention provides a grease composition for resin composition which is characterized by including a base, a thickener, and at least one of a nonpolar wax and a polar wax. Further, the grease composition for resin lubrication is applied to a telescopic shaft for vehicle steering or an electric power steering apparatus, thereby to improve the durability, and to achieve a longer life.Type: ApplicationFiled: March 3, 2004Publication date: June 28, 2007Inventors: Hirotoshi Miyajima, Shinya Nakatani, Toshiyuki Iwano, Michiharu Naka
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Patent number: 7196042Abstract: A grease composition is produced by mixing a thickener comprising a fluoro resin and a second thickener component (a metallic soap, a complex metallic soap, an N-substituted terephthalamic acid metal salt, organic bentonite or a calcium sulfonate complex) into a base oil. This grease composition is excellent in heat resistance, load carring capacity, water resistance, rust protection, lubricating life and the like. A rolling apparatus filled with the above grease composition has excellent lubricating ability and is long-lived under high-temperature conditions. Moreover, a grease composition is produced by mixing a thickener comprising a fluoro resin and carbon black as a second thickener component into a base oil. This grease composition is excellent in heat resistance, water resistance, rust protection, lubricating life, electric conductivity and the like. A rolling apparatus filled with the above grease composition has excellent electric conductivity and is long-lived under high-temperature conditions.Type: GrantFiled: March 4, 2003Date of Patent: March 27, 2007Assignee: NSK Ltd.Inventors: Shinya Nakatani, Yasunobu Fujita, Michita Hokao, Hirotoshi Miyajima
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Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system
Publication number: 20060252655Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.Type: ApplicationFiled: July 6, 2006Publication date: November 9, 2006Inventors: Kenichi Iso, Hirotoshi Miyajima, Katsuaki Denpou, Yujiro Toda, Masahiko Yamazaki, Michiharu Naka, Yasunobu Fujita -
Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system
Publication number: 20060252654Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.Type: ApplicationFiled: July 6, 2006Publication date: November 9, 2006Inventors: Kenichi Iso, Hirotoshi Miyajima, Katsuaki Denpou, Yujiro Toda, Masahiko Yamazaki, Michiharu Naka, Yasunobu Fujita -
Publication number: 20060101935Abstract: A linear motion device has: a linear motion body externally fitted onto a shaft and making a relative linear motion along the shaft; a plurality of balls retained in a rolling element groove formed in an inner surface of the linear motion body, and rolling between the rolling element groove and the shaft; separators interposed among the balls; and a circulating path formed in the linear motion body and for circulating the balls from one end side of the rolling element groove to the other end side thereof; wherein the linear motion device is charged with grease containing base oil which is 220-395 in worked penetration defined by JIS K2220 and 50-500 mm2/s in kinematic viscosity at 40° C.Type: ApplicationFiled: January 16, 2003Publication date: May 18, 2006Inventors: Shinya Nakatani, Masahiko Yamazaki, Hirotoshi Miyajima, Yasuyuki Matsuda
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Rolling bearing, rolling bearing for fuel cell, compressor for fuel cell system and fuel cell system
Publication number: 20050261141Abstract: The rolling bearing of the invention to be incorporated in the compressor for fuel cell system comprises a fluorine-based grease containing a fluororesin and a fluorine-based oil, a urea grease containing a urea compound and a synthetic oil or a lithium complex grease containing a lithium complex and a synthetic oil encapsulated therein. In this arrangement, the grease deterioration of the rolling bearing incorporated in the compressor for force-feeding various fluids between machines can be prevented, making it possible to provide a fuel cell system which can maintain stable operation over an extended period of time.Type: ApplicationFiled: May 20, 2003Publication date: November 24, 2005Inventors: Kenichi Iso, Hirotoshi Miyajima, Katsuaki Denpou, Yujiro Toda, Masahiko Yamazaki, Michiharu Naka, Yasunobu Fujita -
Publication number: 20050221997Abstract: A grease composition is produced by mixing a thickener comprising a fluoro resin and a second thickener component (a metallic soap, a complex metallic soap, an N-substituted terephthalamic acid metal salt, organic bentonite or a calcium sulfonate complex) into a base oil. This grease composition is excellent in heat resistance, load carrying capacity, water resistance, rust protection, lubricating life and the like. A rolling apparatus filled with the above grease composition has excellent lubricating ability and is long-lived under high-temperature conditions. Moreover, a grease composition is produced by mixing a thickener comprising a fluoro resin and carbon black as a second thickener component into a base oil. This grease composition is excellent in heat resistance, water resistance, rust protection, lubricating life, electric conductivity and the like. A rolling apparatus filled with the above grease composition has excellent electric conductivity and is long-lived under high-temperature conditions.Type: ApplicationFiled: May 25, 2005Publication date: October 6, 2005Applicant: NSK Ltd.Inventors: Shinya Nakatani, Yasunobu Fujita, Michita Hokao, Hirotoshi Miyajima
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Publication number: 20050221999Abstract: A grease composition is produced by mixing a thickener comprising a fluoro resin and a second thickener component (a metallic soap, a complex metallic soap, an N-substituted terephthalamic acid metal salt, organic bentonite or a calcium sulfonate complex) into a base oil. This grease composition is excellent in heat resistance, load carrying capacity, water resistance, rust protection, lubricating life and the like. A rolling apparatus filled with the above grease composition has excellent lubricating ability and is long-lived under high-temperature conditions. Moreover, a grease composition is produced by mixing a thickener comprising a fluoro resin and carbon black as a second thickener component into a base oil. This grease composition is excellent in heat resistance, water resistance, rust protection, lubricating life, electric conductivity and the like. A rolling apparatus filled with the above grease composition has excellent electric conductivity and is long-lived under high-temperature conditions.Type: ApplicationFiled: May 25, 2005Publication date: October 6, 2005Applicant: NSK Ltd.Inventors: Shinya Nakatani, Yasunobu Fujita, Michita Hokao, Hirotoshi Miyajima
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Publication number: 20050221996Abstract: A grease composition is produced by mixing a thickener comprising a fluoro resin and a second thickener component (a metallic soap, a complex metallic soap, an N-substituted terephthalamic acid metal salt, organic bentonite or a calcium sulfonate complex) into a base oil. This grease composition is excellent in heat resistance, load carrying capacity, water resistance, rust protection, lubricating life and the like. A rolling apparatus filled with the above grease composition has excellent lubricating ability and is long-lived under high-temperature conditions. Moreover, a grease composition is produced by mixing a thickener comprising a fluoro resin and carbon black as a second thickener component into a base oil. This grease composition is excellent in heat resistance, water resistance, rust protection, lubricating life, electric conductivity and the like. A rolling apparatus filled with the above grease composition has excellent electric conductivity and is long-lived under high-temperature conditions.Type: ApplicationFiled: May 25, 2005Publication date: October 6, 2005Applicant: NSK Ltd.Inventors: Shinya Nakatani, Yasunobu Fujita, Michita Hokao, Hirotoshi Miyajima
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Publication number: 20040186025Abstract: A grease composition is produced by mixing a thickener comprising a fluoro resin and a second thickener component (a metallic soap, a complex metallic soap, an N-substituted terephthalamic acid metal salt, organic bentonite or a calcium sulfonate complex) into a base oil. This grease composition is excellent in heat resistance, load carring capacity, water resistance, rust protection, lubricating life and the like.Type: ApplicationFiled: March 4, 2003Publication date: September 23, 2004Applicant: NSK Ltd.Inventors: Shinya Nakatani, Yasunobu Fujita, Michita Hokao, Hirotoshi Miyajima