Patents by Inventor Takafumi Kuwano
Takafumi Kuwano 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: 20240082983Abstract: A polishing head includes a head housing having a first flange part that extends outward from an upper position of a circumferential surface of a cylindrical body and a second flange part that extends outward from a lower position of the circumferential surface, a membrane support ring that is sized to surround an outer circumference of the second flange part and has a third flange part that is formed at an upper end part thereof and located between the first flange part and the second flange part, a membrane that covers a lower end-side opening part of the membrane support ring and holds the wafer with a backing film pasted to a front surface thereof interposed therebetween, a retainer ring formed in a shape to surround an outer circumference of the substrate, and driving means that integrally horizontally rotates the head housing, the membrane support ring, and the retainer ring.Type: ApplicationFiled: March 14, 2022Publication date: March 14, 2024Inventors: Akio KOMURA, Takafumi KUWANO, Hajime TOMIZAWA
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Patent number: 6785965Abstract: A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.Type: GrantFiled: April 2, 2003Date of Patent: September 7, 2004Assignee: NSK Ltd.Inventors: Hiroyuki Sawai, Takafumi Kuwano, Yoshifumi Hirano
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Patent number: 6761486Abstract: A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.Type: GrantFiled: January 14, 2003Date of Patent: July 13, 2004Assignee: NSK Ltd.Inventors: Hiroya Miyazaki, Yoshihisa Ohnuki, Takafumi Kuwano, Hiroyuki Sawai, Hideo Ouchi
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Patent number: 6672770Abstract: A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.Type: GrantFiled: April 1, 2002Date of Patent: January 6, 2004Assignee: NSK Ltd.Inventors: Hiroya Miyazaki, Yoshihisa Ohnuki, Takafumi Kuwano, Hiroyuki Sawai, Hideo Ouchi
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Publication number: 20030200658Abstract: A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.Type: ApplicationFiled: April 2, 2003Publication date: October 30, 2003Applicant: NSK LTD.Inventors: Hiroyuki Sawai, Takafumi Kuwano, Yoshifumi Hirano
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Patent number: 6581287Abstract: A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.Type: GrantFiled: September 7, 2001Date of Patent: June 24, 2003Assignee: NSK Ltd.Inventors: Hiroyuki Sawai, Takafumi Kuwano, Yoshifumi Hirano
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Publication number: 20030103705Abstract: A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.Type: ApplicationFiled: January 14, 2003Publication date: June 5, 2003Inventors: Hiroya Miyazaki, Yoshihisa Ohnuki, Takafumi Kuwano, Hiroyuki Sawai, Hideo Ouchi
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Patent number: 6524011Abstract: A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.Type: GrantFiled: July 27, 2001Date of Patent: February 25, 2003Assignee: NSK Ltd.Inventors: Hiroya Miyazaki, Yoshihisa Ohnuki, Takafumi Kuwano, Hiroyuki Sawai, Hideo Ouchi
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Publication number: 20020146185Abstract: A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.Type: ApplicationFiled: April 1, 2002Publication date: October 10, 2002Inventors: Hiroya Miyazaki, Yoshihisa Ohnuki, Takafumi Kuwano, Hiroyuki Sawai, Hideo Ouchi
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Patent number: 6422758Abstract: A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.Type: GrantFiled: August 18, 2000Date of Patent: July 23, 2002Assignee: NSK Ltd.Inventors: Hiroya Miyazaki, Yoshihisa Ohnuki, Takafumi Kuwano, Hiroyuki Sawai
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Publication number: 20020006240Abstract: A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.Type: ApplicationFiled: September 7, 2001Publication date: January 17, 2002Applicant: NSK LTD.Inventors: Hiroyuki Sawai, Takafumi Kuwano, Yoshifumi Hirano
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Patent number: 6336747Abstract: A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.Type: GrantFiled: June 12, 2000Date of Patent: January 8, 2002Inventors: Hiroyuki Sawai, Takafumi Kuwano, Yoshifumi Hirano
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Publication number: 20010046339Abstract: A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.Type: ApplicationFiled: July 27, 2001Publication date: November 29, 2001Inventors: Hiroya Miyazaki, Yoshihisa Ohnuki, Takafumi Kuwano, Hiroyuki Sawai
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Patent number: 6280096Abstract: A bearing unit for vehicle wheel support comprising a shaft having a mounting flange for vehicle wheel or suspension apparatus, a step portion formed on one end portion thereof, a first inner ring raceway directly formed thereon, and a crimped portion formed on the end side of the step portion, and an inner ring fitted onto the step portion and having a second inner ring raceway thereon, the shaft being quench hardened at least at the first inner ring raceway with the crimped portion kept as formed and without quench hardened, and the inner ring being fixed to the shaft by the crimped portion of the shaft.Type: GrantFiled: January 16, 1998Date of Patent: August 28, 2001Assignee: NSK Ltd.Inventors: Hiroya Miyazaki, Yoshihisa Ohnuki, Takafumi Kuwano, Hiroyuki Sawai
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Patent number: 6196946Abstract: A power roller of a power roller bearing in a half-toroidal type continuously variable transmission is manufactured as follows. In step S1, a work used as material is heated up to a temperature suitable for forging. In step S2, the work is pressed by using a first die set, with its end face being held. In step S3, the work is forged by using a second die set. The work is formed into a work having a curved face corresponding to a traction surface, a hole corresponding to a center hole, and a recess corresponding to a raceway groove. In step S4, the work is punched by using a third die set. In step S5, the work is subjected to a cutting process and a heating process, thereby obtaining the power roller.Type: GrantFiled: January 21, 1999Date of Patent: March 6, 2001Assignee: NSK Ltd.Inventors: Hiroyuki Sawai, Takafumi Kuwano, Nobuo Gotou, Takashi Imanishi, Nobuaki Mitamura
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Patent number: 6113279Abstract: A caulked portion is formed by plastic deformation of a cylindrical portion which is formed at the inner end of a shaft member and is reduced in thickness toward the leading end in a diametrical outward direction. The force required to form the caulked portion is reduced, and the caulked portion is less susceptible to damage. Further, the force of the caulked portion for supporting the inner ring is ensured.Type: GrantFiled: March 30, 1998Date of Patent: September 5, 2000Assignee: NSK Ltd.Inventors: Hiroyuki Sawai, Takafumi Kuwano, Yoshifumi Hirano