Patents by Inventor Takaaki Anzai
Takaaki Anzai 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: 7530743Abstract: A cylindrical roller bearing with synthetic resin cages, in which heat generation of the bearing during high speed rotation is suppressed, while sufficient rigidity and strength is secured, so that the bearing is excellent in high speed performance. The cylindrical roller bearing (10) has synthetic resin cages (20) each including an annular portion (21) disposed in one axial end portion of the cage (20), and a plurality of columnar portions (25) extending from a side surface of the annular portion (21). The minimum inner diameter d1 of the annular portion (21) is set to be smaller than the maximum inner diameter d2 of each columnar portion (25), and the inner diameter of the columnar portion (25) is set to be equal to the inner diameter d1 of the annular portion (21) over a range of length not longer than ? of the whole length of the columnar portion (25).Type: GrantFiled: September 10, 2002Date of Patent: May 12, 2009Assignee: NSK Ltd.Inventors: Kenji Yakura, Takaaki Anzai, Ken Inaba, Yasushi Morita
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Publication number: 20070266821Abstract: A grease-lubricated rolling bearing has an outer ring having an outer ring race in an inner peripheral surface thereof, an inner ring having an inner ring race on an outer peripheral surface thereof, rolling elements rollably provided between the outer ring race and the inner ring race, and a grease supply element for supplying an additional grease in the rolling bearing. The amount of the additional grease to be supplied at a time is predetermined to be from 0.1 to 4% of the volume of space in the bearing.Type: ApplicationFiled: July 24, 2007Publication date: November 22, 2007Inventors: Saburo Azumi, Yasushi Morita, Naoki Matsuyama, Takaaki Anzai
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Patent number: 7267488Abstract: A grease-lubricated rolling bearing has an outer ring having an outer ring race in an inner peripheral surface thereof, an inner ring having an inner ring race on an outer peripheral surface thereof, rolling elements rollably provided between the outer ring race and the inner ring race, and a grease supply element for supplying an additional grease in the rolling bearing. The amount of the additional grease to be supplied at a time is predetermined to be from 0.1 to 4% of the volume of space in the bearing.Type: GrantFiled: February 8, 2005Date of Patent: September 11, 2007Assignee: NSK Ltd.Inventors: Saburo Azumi, Yasushi Morita, Naoki Matsuyama, Takaaki Anzai
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Patent number: 7033082Abstract: An angular contact ball bearing includes an outer ring having an outer ring race formed on an inner surface thereof, an inner ring having an inner ring race provided on the outer surface thereof, a plurality of rolling elements provided between the outer ring and the inner ring, an annular cage for retaining the rolling elements, and seals provided on openings between the respective ends of the inner and outer rings. The cage is made of a synthetic resin material and is supported through the guide of the rolling elements. The cage includes a plurality of cylindrical pockets arranged peripherally for retaining the rolling elements and a reduced diameter portion formed at ends of the pocket for regulating the radial movement of the cage while being in contact with the rolling element.Type: GrantFiled: January 14, 2004Date of Patent: April 25, 2006Assignee: NSK Ltd.Inventors: Kenji Yakura, Takaaki Anzai, Yasushi Morita, Naoki Matsuyama
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Publication number: 20050129342Abstract: A grease-lubricated rolling bearing has an outer ring having an outer ring race in an inner peripheral surface thereof, an inner ring having an inner ring race on an outer peripheral surface thereof, rolling elements rollably provided between the outer ring race and the inner ring race, and a grease supply element for supplying an additional grease in the rolling bearing. The amount of the additional grease to be supplied at a time is predetermined to be from 0.1 to 4% of the volume of space in the bearing.Type: ApplicationFiled: February 8, 2005Publication date: June 16, 2005Inventors: Saburo Azumi, Yasushi Morita, Naoki Matsuyama, Takaaki Anzai
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Patent number: 6869223Abstract: A grease-lubricated rolling bearing has an outer ring having an outer ring race in an inner peripheral surface thereof, an inner ring having an inner ring race on an outer peripheral surface thereof, rolling elements rollably provided between the outer ring race and the inner ring race, and a grease supply element for supplying an additional grease in the rolling bearing. The amount of the additional grease to be supplied at a time is predetermined to be from 0.1 to 4% of the volume of space in the bearing.Type: GrantFiled: August 1, 2002Date of Patent: March 22, 2005Assignee: NSK Ltd.Inventors: Saburo Azumi, Yasushi Morita, Naoki Matsuyama, Takaaki Anzai
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Publication number: 20040146231Abstract: An angular contact ball bearing includes an outer ring having an outer ring race formed on an inner surface thereof, an inner ring having an inner ring race provided on the outer surface thereof, a plurality of rolling elements provided between the outer ring and the inner ring, an annular cage for retaining the rolling elements, and seals provided on openings between the respective ends of the inner and outer rings. The cage is made of a synthetic resin material and is supported through the guide of the rolling elements. The cage includes a plurality of cylindrical pockets arranged peripherally for retaining the rolling elements and a reduced diameter portion formed at ends of the pocket for regulating the radial movement of the cage while being in contact with the rolling element.Type: ApplicationFiled: January 14, 2004Publication date: July 29, 2004Applicant: NSK LTD.Inventors: Kenji Yakura, Takaaki Anzai, Yasushi Morita, Naoki Matsuyama
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Patent number: 6742934Abstract: A rolling bearing includes an inner ring having an outer surface, an outer ring having an inner surface, a plurality of rolling elements rotatably disposed between the inner ring and the outer ring, and a retainer for retaining the rolling elements. The retainer is made of a resin material and is positioned with respect to the inner surface of the outer ring or the outer surface of the inner ring. The retainer includes a pair of annular portions axially arranged in parallel and a columnar portion coupling the annular portions. Then, the rolling bearing satisfies the following expression: AI=LH3/dm≧0.025 in which H is a radial length of a section of the annular portion, L is an axial length of the same, and dm is PCD of the rolling element.Type: GrantFiled: October 26, 2001Date of Patent: June 1, 2004Assignee: NSK Ltd.Inventors: Naoki Matsuyama, Sumio Sugita, Yu Koiwa, Takaaki Anzai, Tamotsu Misawa, Masaru Terasaki
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Patent number: 6709161Abstract: An angular contact ball bearing includes an outer ring having an outer ring race formed on an inner surface thereof, an inner ring having an inner ring race provided on the outer surface thereof, a plurality of rolling elements provided between the outer ring and the inner ring, an annular cage for retaining the rolling elements, and seals provided on openings between the respective ends of the inner and outer rings. The cage is made of a synthetic resin material and is supported through the guide of the rolling elements. The cage includes a plurality of cylindrical pockets arranged peripherally for retaining the rolling elements and a reduced diameter portion formed at ends of the pocket for regulating the radial movement of the cage while being in contact with the rolling element.Type: GrantFiled: July 31, 2002Date of Patent: March 23, 2004Assignee: NSK Ltd.Inventors: Kenji Yakura, Takaaki Anzai, Yasushi Morita, Naoki Matsuyama
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Publication number: 20030113048Abstract: A grease-lubricated rolling bearing has an outer ring having an outer ring race in an inner peripheral surface thereof, an inner ring having an inner ring race on an outer peripheral surface thereof, rolling elements rollably provided between the outer ring race and the inner ring race, and a grease supply element for supplying an additional grease in the rolling bearing. The amount of the additional grease to be supplied at a time is predetermined to be from 0.1 to 4% of the volume of space in the bearing.Type: ApplicationFiled: August 1, 2002Publication date: June 19, 2003Applicant: NSK LTD.Inventors: Saburo Azumi, Yasushi Morita, Naoki Matsuyama, Takaaki Anzai
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Publication number: 20030026509Abstract: An angular contact ball bearing includes an outer ring having an outer ring race formed on an inner surface thereof, an inner ring having an inner ring race provided on the outer surface thereof, a plurality of rolling elements provided between the outer ring and the inner ring, an annular cage for retaining the rolling elements, and seals provided on openings between the respective ends of the inner and outer rings. The cage is made of a synthetic resin material and is supported through the guide of the rolling elements. The cage includes a plurality of cylindrical pockets arranged peripherally for retaining the rolling elements and a reduced diameter portion formed at ends of the pocket for regulating the radial movement of the cage while being in contact with the rolling element.Type: ApplicationFiled: July 31, 2002Publication date: February 6, 2003Applicant: NSK LTD.Inventors: Kenji Yakura, Takaaki Anzai, Yasushi Morita, Naoki Matsuyama
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Publication number: 20020097939Abstract: A rolling bearing includes an inner ring having an outer surface, an outer ring having an inner surface, a plurality of rolling elements rotatably disposed between the inner ring and the outer ring, and a retainer for retaining the rolling elements. The retainer is made of a resin material and is positioned with respect to the inner surface of the outer ring or the outer surface of the inner ring. The retainer includes a pair of annular portions axially arranged in parallel and a columnar portion coupling the annular portions. Then, the rolling bearing satisfies the following expression: AI=LH3/dm ≧0.025 in which H is a radial length of a section of the annular portion, L is an axial length of the same, and dm is PCD of the rolling element.Type: ApplicationFiled: October 26, 2001Publication date: July 25, 2002Applicant: NSK LTD.Inventors: Naoki Matsuyama, Sumio Sugita, Yu Koiwa, Takaaki Anzai, Tamotsu Misawa, Masaru Terasaki
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Patent number: RE48843Abstract: A rolling bearing includes an inner ring having an outer surface, an outer ring having an inner surface, a plurality of rolling elements rotatably disposed between the inner ring and the outer ring, and a retainer for retaining the rolling elements. The retainer is made of a resin material and is positioned with respect to the inner surface of the outer ring or the outer surface of the inner ring. The retainer includes a pair of annular portions axially arranged in parallel and a columnar portion coupling the annular portions. Then, the rolling bearing satisfies the following expression: AI=LH3/dm?0.025 LH3/dm2?0.025 mm2 in which H is a radial length of a section of the annular portion, L is an axial length of the same, and dm is PCD of the rolling element.Type: GrantFiled: April 11, 2019Date of Patent: December 7, 2021Assignee: NSK LTD.Inventors: Naoki Matsuyama, Sumio Sugita, Yu Koiwa, Takaaki Anzai, Tamotsu Misawa, Masaru Terasaki