Spindle motor
US8562221B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2011 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Oct 16, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is a spindle motor including: a shaft; a sleeve supporting the shaft; a hub including the shaft coupled to the center of rotation thereof; a sealing member including an operating fluid provided between the shaft and the sleeve and formed to be spaced apart from an outer peripheral surface of the sleeve; an oil sealing part including an oil interface formed between an inner peripheral surface of the sealing member and the outer peripheral surface of the sleeve facing each other, and a sealing surface layer formed on an outer side of the oil interface. The sealing surface layer is formed from an inner side of the oil interface formed in the oil sealing part of a fluid dynamic pressure bearing part toward the outer side thereof, thereby making it possible to improve an oil sealing effect in the oil interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.