Patents by Inventor Kimihiko Bitou
Kimihiko Bitou 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: 8578611Abstract: An apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device, specifically for properly and effectively wiping off the lubricating oil adhering to the outside of the housing and adjusting the oil-level height of the lubricating oil filled in the housing.Type: GrantFiled: July 29, 2011Date of Patent: November 12, 2013Assignee: NTN CorporationInventors: Masayuki Kaimi, Kazuto Shimizu, Kimihiko Bitou, Nao Ishiyama, Nobuyoshi Yamashita
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Patent number: 8454239Abstract: A first axial gap (L1) is formed between a seal portion (9) and a sleeve portion (8). With this, it is possible to set a moving amount of a shaft member (2) in an axial direction with high accuracy irrespective of accuracy of members such as the sleeve portion (8).Type: GrantFiled: July 18, 2008Date of Patent: June 4, 2013Assignee: NTN CorporationInventors: Kimihiko Bitou, Isao Komori, Tetsuya Kurimura
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Patent number: 8240918Abstract: A shaft portion is press-fitted to a flange portion, and a plastic working portion of a first jig is pressed against an upper end surface of the flange portion, whereby the flange portion is partially subjected to plastic deformation toward an inner peripheral side. With this, a caulked portion is formed between the flange portion and the shaft portion. Further, press-fitting and caulking are performed in a state in which both end surfaces of the flange portion are bound by a second jig and a third jig.Type: GrantFiled: December 18, 2007Date of Patent: August 14, 2012Assignee: NTN CorporationInventors: Kimihiko Bitou, Jun Hirade, Kazuto Shimizu, Tetsuya Yamamoto, Isao Komori
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Patent number: 8120220Abstract: To provide a fluid dynamic pressure bearing device that achieves high rigidity against moment without degradation in assembly precision and bearing performance, bearing sleeves are arranged in an axial direction and coaxiality of radial bearing surfaces formed on inner peripheral surfaces of the bearing sleeves is set to 3 ?m or less. This secures width precision between the radial bearing gaps to prevent a degradation in bearing performance and a failure such as wear etc. caused by contact between a shaft member and the bearing sleeves. Further, a first radial bearing surface and a second radial bearing surface are provided on at least one sleeve, and this allows a sleeve assembly constructed from the bearing sleeves to be supported at least three positions in the axial direction in a process of assembling the sleeve assembly.Type: GrantFiled: November 9, 2006Date of Patent: February 21, 2012Assignee: NTN CorporationInventors: Nobuyoshi Yamashita, Masaaki Toda, Kimihiko Bitou, Masaharu Hori
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Publication number: 20110277291Abstract: An apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device, specifically for properly and effectively wiping off the lubricating oil adhering to the outside of the housing and adjusting the oil-level height of the lubricating oil filled in the housing.Type: ApplicationFiled: July 29, 2011Publication date: November 17, 2011Applicant: NTN CORPORATIONInventors: MASAYUKI KAIMI, KAZUTO SHIMIZU, KIMIHIKO BITOU, NAO ISHIYAMA, NOBUYOSHI YAMASHITA
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Patent number: 8020301Abstract: A method for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device, specifically for properly and effectively wiping off the lubricating oil adhering to the outside of the housing and adjusting the oil-level height of the lubricating oil filled in the housing.Type: GrantFiled: March 10, 2006Date of Patent: September 20, 2011Assignee: NTN CorporationInventors: Masayuki Kaimi, Kazuto Shimizu, Kimihiko Bitou, Nao Ishiyama, Nobuyoshi Yamashita
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Patent number: 7941926Abstract: An apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device. The hydro dynamic bearing is constructed of an axial member housed in a housing, a radial bearing part for supporting the axial member in a non-contact manner in a radial direction by a hydro dynamic pressure action of the lubricating oil generated in a radial bearing clearance, and a sealing part arranged in an opening part of the housing, and the apparatus has a laser for measuring an oil-level height of the lubricating oil in the housing.Type: GrantFiled: July 8, 2009Date of Patent: May 17, 2011Assignee: NTN CorporationInventors: Masayuki Kaimi, Kazuto Shimizu, Kimihiko Bitou, Nao Ishiyama, Nobuyoshi Yamashita
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Publication number: 20100231074Abstract: To provide a fluid dynamic pressure bearing device that achieves high rigidity against moment without degradation in assembly precision and bearing performance, bearing sleeves are arranged in an axial direction and coaxiality of radial bearing surfaces formed on inner peripheral surfaces of the bearing sleeves is set to 3 ?m or less. This secures width precision between the radial bearing gaps to prevent a degradation in bearing performance and a failure such as wear etc. caused by contact between a shaft member and the bearing sleeves. Further, a first radial bearing surface and a second radial bearing surface are provided on at least one sleeve, and this allows a sleeve assembly constructed from the bearing sleeves to be supported at least three positions in the axial direction in a process of assembling the sleeve assembly.Type: ApplicationFiled: November 9, 2006Publication date: September 16, 2010Applicant: NTN CORPORATIONInventors: Nobuyoshi Yamashita, Masaaki Toda, Kimihiko Bitou, Masaharu Hori
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Publication number: 20100226601Abstract: A hub (10) is a product formed by injection molding of a resin together with a core metal (13) as an inserted component, and the core metal (13) is exposed on a surface of the hub (10). With this configuration, a cavity of a die for molding the hub (10) is not divided by the core metal (13), and hence it is possible to suppress deterioration in fluidity of a resin due to arrangement of the core metal (13) in the cavity.Type: ApplicationFiled: August 28, 2007Publication date: September 9, 2010Applicant: NTN CORPORATIONInventors: Yoshiharu Inazuka, Jun Hirade, Tetsuya Kurimura, Isao Komori, Kimihiko Bitou
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Publication number: 20100189383Abstract: A first axial gap (L1) is formed between a seal portion (9) and a sleeve portion (8). With this, it is possible to set a moving amount of a shaft member (2) in an axial direction with high accuracy irrespective of accuracy of members such as the sleeve portion (8).Type: ApplicationFiled: July 18, 2008Publication date: July 29, 2010Applicant: NTN CORPORATIONInventors: Kimihiko Bitou, Isao Komori, Tetsuya Kurimura
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Publication number: 20100129014Abstract: [Object] To manufacture at lower cost a shaft member for a fluid dynamic bearing device, which is excellent in accuracy of bearing surfaces and shape accuracy between the bearing surfaces, and which has high fixation strength between a shaft portion and a flange portion. [Solving Means] A shaft portion (21) is press-fitted to a flange portion (22), and a plastic working portion (31c) of a first jig (31) is pressed against an upper end surface (22a) of the flange portion (22), whereby the flange portion (22) is partially subjected to plastic deformation toward an inner peripheral side. With this, a caulked portion (23) is formed between the flange portion (22) and the shaft portion (21). Further, press-fitting and caulking are performed in a state in which both end surfaces (22a and 22b) of the flange portion (22) are bound by a second jig (32) and a third jig (33).Type: ApplicationFiled: December 18, 2007Publication date: May 27, 2010Applicant: NTN CORPORATIONInventors: Kimihiko Bitou, Jun Hirade, Kazuto Shimizu, Tetsuya Yamamoto, Isao Komori
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Publication number: 20090265922Abstract: An apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device. The hydro dynamic bearing is constructed of an axial member housed in a housing, a radial bearing part for supporting the axial member in a non-contact manner in a radial direction by a hydro dynamic pressure action of the lubricating oil generated in a radial bearing clearance, and a sealing part arranged in an opening part of the housing, and the apparatus has a laser for measuring an oil-level height of the lubricating oil in the housing.Type: ApplicationFiled: July 8, 2009Publication date: October 29, 2009Applicant: NTN CORPORATIONInventors: MASAYUKI KAIMI, KAZUTO SHIMIZU, KIMIHIKO BITOU, NAO ISHIYAMA, NOBUYOSHI YAMASHITA
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Patent number: 7600320Abstract: A method for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device. The hydro dynamic bearing is constructed of an axial member housed in a housing, a radial bearing part for supporting the axial member in a non-contact manner in a radial direction by a hydro dynamic pressure action of the lubricating oil generated in a radial bearing clearance, and a sealing part arranged in an opening part of the housing, and the method has the step of measuring the oil-level height of the lubricating oil in the housing by a laser detector.Type: GrantFiled: March 10, 2006Date of Patent: October 13, 2009Assignee: NTN CorporationInventors: Masayuki Kaimi, Kazuto Shimizu, Kimihiko Bitou, Nao Ishiyama, Nobuyoshi Yamashita
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Publication number: 20060150414Abstract: A method and an apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device, specifically for properly and effectively wiping off the lubricating oil adhering to the outside of the housing and adjusting the oil-level height of the lubricating oil filled in the housing.Type: ApplicationFiled: March 10, 2006Publication date: July 13, 2006Inventors: Masayuki Kaimi, Kazuto Shimizu, Kimihiko Bitou, Nao Ishiyama, Nobuyoshi Yamashita
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Publication number: 20060150415Abstract: A method and an apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device, specifically for properly and effectively wiping off the lubricating oil adhering to the outside of the housing and adjusting the oil-level height of the lubricating oil filled in the housing.Type: ApplicationFiled: March 10, 2006Publication date: July 13, 2006Inventors: Masayuki Kaimi, Kazuto Shimizu, Kimihiko Bitou, Nao Ishiyama, Nobuyoshi Yamashita
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Patent number: 7040019Abstract: A method and an apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device, specifically for properly and effectively wiping off the lubricating oil adhering to the outside of the housing and adjusting the oil-level height of the lubricating oil filled in the housing.Type: GrantFiled: March 28, 2003Date of Patent: May 9, 2006Assignee: NTN CorporationInventors: Masayuki Kaimi, Kazuto Shimizu, Kimihiko Bitou, Nao Ishiyama, Nobuyoshi Yamashita
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Publication number: 20030221317Abstract: A method and an apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device, specifically for properly and effectively wiping off the lubricating oil adhering to the outside of the housing and adjusting the oil-level height of the lubricating oil filled in the housing.Type: ApplicationFiled: March 28, 2003Publication date: December 4, 2003Inventors: Masayuki Kaimi, Kazuto Shimizu, Kimihiko Bitou, Nao Ishiyama, Nobuyoshi Yamashita