Dynamical pressure bearing device, motor, and recording disc driving device
US7789566B2 · kind B2 · utility
1Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2005 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Nov 27, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a dynamical pressure bearing device, a motor and a recording drive device. The dynamical pressure bearing device has a shaft having a first bearing surface and a first portion exteriorly adjacent to the first bearing surface; and a sleeve having a second bearing surface and a second portion exteriorly adjacent to the second bearing surface. The sleeve is rotatably engaged with the shaft with a clearance. The oil repellent film includes a fluorine polymer having a perfluoroalkyl group; and a chromogenic substance which makes color development in blue at UV irradiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.