Invention Grant
- Patent Title: Fluid dynamic bearing device
- Patent Title (中): 流体动力轴承装置
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Application No.: US13121807Application Date: 2009-09-16
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Publication No.: US08821021B2Publication Date: 2014-09-02
- Inventor: Kimihiko Bito , Jun Hirade
- Applicant: Kimihiko Bito , Jun Hirade
- Applicant Address: JP Osaka-shi
- Assignee: NTN Corporation
- Current Assignee: NTN Corporation
- Current Assignee Address: JP Osaka-shi
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2008-265158 20081014
- International Application: PCT/JP2009/066115 WO 20090916
- International Announcement: WO2010/044327 WO 20100422
- Main IPC: F16C32/06
- IPC: F16C32/06
Abstract:
A shaft member is provided with a shaft portion and a flange portion coupled with a lower end surface of the shaft portion. The shaft portion is formed into a complete circular shape in cross section, and the flange portion is provided with a through-hole in which a part of a circumferential region is retracted to a radially outer side with respect to a lower end of the shaft portion so as to exhibit a non-circular shape. The shaft portion and the flange portion are coupled with each other in a state of butting the lower end surface of the shaft portion and an upper end surface of the flange portion against each other. With this, a fluid path is formed by opening both end surfaces of the flange portion.
Public/Granted literature
- US20110176758A1 FLUID DYNAMIC BEARING DEVICE Public/Granted day:2011-07-21
Information query
