Invention Grant
US07846883B2 Hydrodynamic bearing device, and spindle motor and information device using the same
有权
流体动力轴承装置，主轴电机和信息装置使用相同
- Patent Title: Hydrodynamic bearing device, and spindle motor and information device using the same
- Patent Title (中): 流体动力轴承装置，主轴电机和信息装置使用相同
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Application No.: US11806930Application Date: 2007-06-05
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Publication No.: US07846883B2Publication Date: 2010-12-07
- Inventor: Katsushi Hirata , Takanori Shiraishi
- Applicant: Katsushi Hirata , Takanori Shiraishi
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2006-156378 20060605
- Main IPC: C10M105/38
- IPC: C10M105/38 ; F16C33/10
Abstract:
A hydrodynamic bearing device, comprising a shaft structure, a sleeve, a dynamic pressure-generating groove which is formed on surface of at least one of a shaft structure and a sleeve, and a lubricant present in a gap between the shaft structure and the sleeve; wherein the lubricant contains a diester with a total carbon number of 20 to 28 obtainable by a divalent alcohol that has three ether bond, and one or more types of a saturated monovalent fatty acid with carbon number of 6 to 10.
Public/Granted literature
- US20080107367A1 Hydrodynamic bearing device, and spindle motor and information device using the same Public/Granted day:2008-05-08
Information query
IPC分类:
