Motor and hard disk drive including the same
US8737016B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2013 |
| Grant date | May 27, 2014 |
| Priority date | — |
| Expiry date | Jan 16, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There are provided a motor and a hard disk drive including the same. The motor includes: a sleeve supporting a shaft with a lubricating fluid; and a rotor fixed to the shaft, rotating together therewith, and having a surface facing the sleeve, wherein one surface of the surface of the rotor facing the sleeve and a surface of the sleeve facing the rotor is provided with a thrust dynamic pressure groove, and the other surface of the surface of the rotor facing the sleeve and the surface of the sleeve facing the rotor is provided with an extension groove extended to the outside of the thrust dynamic pressure groove so as to partially face the thrust dynamic pressure groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.