Patents by Inventor Takahiko Uchiyama
Takahiko Uchiyama 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: 8303192Abstract: A resin snap cage 4 comprises a resin-made circular main part 10, a plurality of pockets 11 provided in one axial end face of the circular main part 10, and a circular reinforcing member 12 installed concentrically at the other end face in an axial direction of the circular main part 10. While this reinforcing member 12 is circular along the circular main part 10, a sectional shape in a plane parallel to an axial direction is a rectangle. The reinforcing member 12 is embedded in a recessed portion formed at the other end face in an axial direction of the circular main part 10 to be integrated, an outside diameter surface 12a, an inside diameter surface 12b, and a pocket-side surface 12c of the reinforcing member 12 are covered with the circular main part 10, and a surface 12d thereof opposite to the pocket side is exposed.Type: GrantFiled: November 20, 2006Date of Patent: November 6, 2012Assignee: NSK Ltd.Inventors: Takiyoshi Yamada, Takahiko Uchiyama, Kenichi Iso, Junji Ono, Masahiro Harunaga, Kinji Yukawa, Makoto Yasuda, Jianjun Zhan, Nariaki Aihara
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Publication number: 20090220181Abstract: A resin snap cage 4 comprises a resin-made circular main part 10, a plurality of pockets 11 provided in one axial end face of the circular main part 10, and a circular reinforcing member 12 installed concentrically at the other end face in an axial direction of the circular main part 10. While this reinforcing member 12 is circular along the circular main part 10, a sectional shape in a plane parallel to an axial direction is a rectangle. The reinforcing member 12 is embedded in a recessed portion formed at the other end face in an axial direction of the circular main part 10 to be integrated, an outside diameter surface 12a, an inside diameter surface 12b, and a pocket-side surface 12c of the reinforcing member 12 are covered with the circular main part 10, and a surface 12d thereof opposite to the pocket side is exposed.Type: ApplicationFiled: November 20, 2006Publication date: September 3, 2009Applicant: NSK LTD.Inventors: Takiyoshi Yamada, Takahiko Uchiyama, Kenichi Iso, Junji Ono, Masahiro Harunaga, Kinji Yukawa, Makoto Yasuda, Jianjun Zhan, Nariaki Aihara
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Patent number: 7264249Abstract: A hub unit including a hub and a flange integrally formed with the hub, and a seal including a core metal and an elastic body integrally molded with the core metal. The elastic body includes one or more lips in sliding contact with one or both of the hub and the flange. The elastic body includes a molded rubber, wherein the molded rubber contains, as a raw rubber, acrylonitrile/butadiene rubber having an acrylonitrile monomer content of from 26 to 36% by weight. In a first embodiment, the hub unit includes a hub adapted for receiving a shaft and a flange integrally formed with the hub, and the seal is attached to an outer circumference of the hub unit. In a second embodiment, the hub unit includes an inner ring having a raceway surface for receiving rolling elements and an outer ring. The seal seals the space between the inner ring and the outer ring. Furthermore, the seal includes a radial lip in sliding contact with an outer circumferential surface of the hub.Type: GrantFiled: October 15, 2004Date of Patent: September 4, 2007Assignee: NSK, Ltd.Inventors: Keisuke Yokoyama, Takahiko Uchiyama, Toshikazu Yabe, Toshimi Takajo
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Patent number: 7011452Abstract: A rolling bearing with shield plate comprises an outer ring having an outer ring raceway and a circumferential anchor groove, the anchor groove provided at an axial end portion separated from the outer ring raceway and having an outside facing side surface, an inner ring having an inner ring raceway, a plurality of rolling members between the outer ring raceway and the inner ring raceway, and a shield plate in a generally circular ring shape provided with an inside facing, radially outer portion and an outer peripheral edge portion which is anchored in the anchor groove of the outer ring, the shield plate having an elastic seal member attached generally circumferentially and radially inner than the outer peripheral edge portion of the shield plate, such that the seal member is elastically held between the shield plate and the anchor groove.Type: GrantFiled: January 30, 2004Date of Patent: March 14, 2006Assignee: NSK Ltd.Inventors: Hironori Suzuki, Takamasa Itsu, Hiroyuki Osawa, Takahiko Uchiyama
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Publication number: 20050046115Abstract: A seal 1 having one or more lips 13 constituted of a molded rubber is described, wherein the lips 13 (the whole elastic body 3) have been formed so as to have a maximum value of loss tangent (tan ?) of 0.40 or smaller in the temperature range of from 20 to 70° C.Type: ApplicationFiled: October 15, 2004Publication date: March 3, 2005Inventors: Keisuke Yokoyama, Takahiko Uchiyama, Toshikazu Yabe, Toshimi Takajo
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Publication number: 20040184690Abstract: A rolling bearing with shield plate comprises an outer ring having an outer ring raceway and a circumferential anchor groove, the anchor groove provided at an axial end portion separated from the outer ring raceway and having an outside facing side surface, an inner ring having an inner ring raceway, a plurality of rolling members between the outer ring raceway and the inner ring raceway, and a shield plate in a generally circular ring shape provided with an inside facing, radially outer portion and an outer peripheral edge portion which is anchored in the anchor groove of the outer ring, the shield plate having an elastic seal member attached generally circumferentially and radially inner than the outer peripheral edge portion of the shield plate, such that the seal member is elastically held between the shield plate and the anchor groove.Type: ApplicationFiled: January 30, 2004Publication date: September 23, 2004Applicant: NSK Ltd.Inventors: Hironori Suzuki, Takamasa Itsu, Hiroyuki Osawa, Takahiko Uchiyama
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Publication number: 20040179757Abstract: The present invention is to offer a rubber material composition excellent in an abrasion resistance and less to cause heat by friction, and is suitably used to sealing members of rolling devices to be used with grease lubrication under severe circumstances allowing water or dusts to much exist. The rubber material composition is fabricated with carboxylated acrylonitrile-butadiene rubber.Type: ApplicationFiled: March 19, 2004Publication date: September 16, 2004Applicant: NSK LTD.Inventors: Toshikazu Yabe, Toshimi Takajo, Takahiko Uchiyama, Keisuke Yokoyama
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Patent number: 6776531Abstract: A rolling bearing with seal plate for transmission comprising: an inner race that has an inner ring raceway around its outer peripheral surface in the middle in the axial direction; an outer race that has an outer ring raceway around its inner peripheral surface in the middle in the axial direction; a plurality of rolling bodies that are located between the inner ring raceway and the outer ring raceway such that they rotate freely; and a seal plate that is made of synthetic resin and has one of the peripheral edges attached to part of one of the inner race and outer race, and the other of the peripheral edges made to come in sliding contact with a cylindrical surface of the other of the inner race and outer race therearound in parallel to the central axis thereof.Type: GrantFiled: April 19, 2001Date of Patent: August 17, 2004Assignee: NSK Ltd.Inventors: Yuki Tsuchida, Masao Takeda, Takahiko Uchiyama
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Patent number: 6746157Abstract: A retainer constituting a rolling bearing is formed by melt-molding a resin composition containing a polyvinylidene fluoride resin as a main component.Type: GrantFiled: November 20, 2001Date of Patent: June 8, 2004Assignee: NSK Ltd.Inventors: Toyohisa Yamamoto, Takahiko Uchiyama
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Patent number: 6715922Abstract: A rolling bearing with the sealing device which has a fitting groove and sealing device with a mounting portion. The fitting groove formed on the inner peripheral surface of an outer ring. An outside surface of the fitting groove tilts at 5 to 30 degrees with respect to an radial direction of the bearing. An inside surface of the fitting groove tilts at a tilt angle smaller than that of the outside surface. A total of these tilt angles is 35 degrees or more. The mounting portion has a base portion contacting the inside surface and a portion projecting toward the outside surface of the fitting groove from the base portion, and the mounting portion is thinnest at a front end portion of the projecting portion.Type: GrantFiled: November 16, 2001Date of Patent: April 6, 2004Assignee: NSK Ltd.Inventors: Hiromitsu Asai, Toshimi Takajo, Takahiko Uchiyama, Takashi Ogawa, Yoshinori Tanaka
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Patent number: 6699926Abstract: The present invention provides a lubricant-feeding material which can be used at a temperature as high as from 100° C. to 120° C., exhibits an excellent mechanical strength and stably maintains a lubricating oil having a high polarity such as ester oil and polyphenylether oil, which have excellent lubricating properties or heat resistance, or a grease comprising such a lubricating oil as a base oil in a large amount. The lubricant-feeding material comprises a polyester elastomer comprising a hard component made of a first polyester and a soft component made of a second polyester or polyether solidified containing a lubricating oil compatible with the polyester elastomer or a grease comprising the lubricating oil as a base oil, the lubricating oil oozing from the surface of the polyester elastomer.Type: GrantFiled: October 24, 2001Date of Patent: March 2, 2004Assignee: NSK Ltd.Inventors: Toshikazu Yabe, Takahiko Uchiyama
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Patent number: 6639019Abstract: A rubber composition containing a tetrafluoroethylene-propylene bipolymer and from 0.02 to 10 parts by weight of a liquid polybutadiene per 100 parts by weight of the tetrafluoroethylene-propylene bipolymer and a rubber sealing device in which the rubber composition is joined to a reinforcing member are described, by which long-life rubber sealing devices which are highly tolerant to liquids containing amine-based additives, for example, soluble-type synthetic cutting coolants and engine oils suitable for high-speed processing and can sustain favorable sealing performance over a long period of time and rubber compositions appropriate therefor are provided.Type: GrantFiled: February 14, 2002Date of Patent: October 28, 2003Assignee: NSK Ltd.Inventors: Toshikazu Yabe, Takahiko Uchiyama, Nariaki Aihara, Keisuke Yokoyama
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Patent number: 6624252Abstract: A sealing device equipped with a lip made of a rubber material composition wherein the rubber material composition comprises 100 parts by weight of a tetrafluoroethylene-propylene copolymer and 0.02 to 10 parts by weight of an ethylene-propylene-based copolymer is described, by which a long life sealing device that is not deteriorated even when used under an environment where chemicals such as a cutting lubricant containing an additive adversely affecting rubbers contact the sealing device is provided.Type: GrantFiled: December 13, 2001Date of Patent: September 23, 2003Assignee: NSK Ltd.Inventors: Toshikazu Yabe, Takahiko Uchiyama, Keisuke Yokoyama
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Patent number: 6592264Abstract: The present invention provides a rolling bearing having a prolonged life suitable for wheel, railway vehicle and steel rolling mill comprising a sealing member which exhibits fair sealing properties even under severe conditions. A rolling bearing comprising an outer ring having an outer raceway formed on the inner surface thereof, an inner ring having an inner raceway formed on the outer surface thereof, a plurality of rolling elements rollably provided between the outer ring and the inner ring, and a sealing member for sealing the axial opening of the space between the inner surface of the outer ring and the outer surface of the inner ring in which said rolling elements are provided, characterized in that the sealing member is formed by an elastic member made of a vulcanizable rubber composition obtained by blending a carboxylated acrylonitrile-butadiene rubber with at least carbon black.Type: GrantFiled: September 14, 2001Date of Patent: July 15, 2003Assignee: NSK Ltd.Inventors: Toshikazu Yabe, Takahiko Uchiyama, Keisuke Yokoyama, Nariaki Aihara
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Publication number: 20030127803Abstract: A seal 1 having one or more lips 13 constituted of a molded rubber is described, wherein the lips 13 (the whole elastic body 3) have been formed so as to have a maximum value of loss tangent (tan &dgr;) of 0.40 or smaller in the temperature range of from 20 to 70° C.Type: ApplicationFiled: July 19, 2002Publication date: July 10, 2003Applicant: NSK LTD.Inventors: Keisuke Yokoyama, Takahiko Uchiyama, Toshikazu Yabe, Toshimi Takajo
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Patent number: 6572269Abstract: A linear guide apparatus includes a slider, a guide rail opposing the slider with a clearance provided therebetween, a plurality of rolling elements which are rotatably interposed there between, and a contact seal device for sealing an opening of the clearance. A side seal member of the contact seal device is made of a rubber material composition containing fluoro rubber. The rubber basically comprises at least one of copolymers that are vinylidenefluoride-tetrafluoroethylene-polypropylene terpolymer and tetrafluoroethylene-polypropylene copolymer.Type: GrantFiled: November 30, 2001Date of Patent: June 3, 2003Assignee: NSK Ltd.Inventors: Toshikazu Yabe, Takahiko Uchiyama, Keisuke Yokoyama, Nariaki Aihara
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Publication number: 20030002759Abstract: The present invention provides a rolling bearing having a prolonged life suitable for wheel, railway vehicle and steel rolling mill comprising a sealing member which exhibits fair sealing properties even under severe conditions. A rolling bearing comprising an outer ring having an outer raceway formed on the inner surface thereof, an inner ring having an inner raceway formed on the outer surface thereof, a plurality of rolling elements rollably provided between the outer ring and the inner ring, and a sealing member for sealing the axial opening of the space between the inner surface of the outer ring and the outer surface of the inner ring in which said rolling elements are provided, characterized in that the sealing member is formed by an elastic member made of a vulcanizable rubber composition obtained by blending a carboxylated acrylonitrile-butadiene rubber with at least carbon black.Type: ApplicationFiled: September 14, 2001Publication date: January 2, 2003Applicant: NSK LTD.Inventors: Toshikazu Yabe, Takahiko Uchiyama, Keisuke Yokoyama, Nariaki Aihara
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Publication number: 20020191877Abstract: A rolling bearing with shield plate comprises an outer ring having an outer ring raceway and a circumferential anchor groove, the anchor groove provided at an axial end portion separated from the outer ring raceway and having an outside facing side surface, an inner ring having an inner ring raceway, a plurality of rolling members between the outer ring raceway and the inner ring raceway, and a shield plate in a generally circular ring shape provided with an inside facing, radially outer portion and an outer peripheral edge portion which is anchored in the anchor groove of the outer ring, the shield plate having an elastic seal member attached generally circumferentially and radially inner than the outer peripheral edge portion of the shield plate, such that the seal member is elastically held between the shield plate and the anchor groove.Type: ApplicationFiled: February 14, 2000Publication date: December 19, 2002Inventors: Hironori Suzuki, Takamasa Itsu, Hiroyuki Osawa, Takahiko Uchiyama
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Publication number: 20020161127Abstract: A rubber composition containing a tetrafluoroethylene-propylene bipolymer and from 0.02 to 10 parts by weight of a liquid polybutadiene per 100 parts by weight of the tetrafluoroethylene-propylene bipolymer and a rubber sealing device in which the rubber composition is joined to a reinforcing member are described, by which long-life rubber sealing devices which are highly tolerant to liquids containing amine-based additives, for example, soluble-type synthetic cutting coolants and engine oils suitable for high-speed processing and can sustain favorable sealing performance over a long period of time and rubber compositions appropriate therefor are provided.Type: ApplicationFiled: February 14, 2002Publication date: October 31, 2002Applicant: NSK LTD.Inventors: Toshikazu Yabe, Takahiko Uchiyama, Nariaki Aihara, Keisuke Yokoyama
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Publication number: 20020154838Abstract: A linear guide apparatus includes a slider, a guide rail opposing the slider with a clearance provided therebetween, a plurality of rolling elements which are rotatably interposed there between, and a contact seal device for sealing an opening of the clearance. A side seal member of the contact seal device is made of a rubber material composition containing fluoro rubber. The rubber basically comprises at least one of copolymers that are vinylidenefluoride-tetrafluoroethylene-polypropylene terpolymer and tetrafluoroethylene-polypropylene copolymer.Type: ApplicationFiled: November 30, 2001Publication date: October 24, 2002Applicant: NSK LTD.Inventors: Toshikazu Yabe, Takahiko Uchiyama, Keisuke Yokoyama, Nariaki Aihara