Rotational assembly for disc drive device having small runout and reduced axial displacement
US6172847A · kind A · utility
19Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Mar 27, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A disc drive device includes a rotational assembly which is adapted to mount a disc thereon and is rotatably driven by a motor. The rotational assembly is rotatably supported on a support assembly by a radial hydrodynamic fluid bearing and a thrust bearing. An axial load is applied to the thrust bearing by a magnetic attractive force of up to 30N and is greater than a dead weight of the rotational assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.