Ball spindle for reduced friction rotary actuator in disk drive
US5510940A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Nov 14, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A low friction bearing is provided for a mass balanced rotary voice coil actuator of a disk drive including a base. The bearing comprises an upper pivot bearing assembly fixed to one of the actuator and the base and including a plurality of small bearing balls in an outer bearing race thereof, a lower pivot bearing assembly fixed to the same one of the actuator and the base and including a plurality of small bearing balls in an outer bearing race thereof, an upper main bearing ball for engaging the other of the actuator and the base and for making rolling contact against the plurality of small bearing balls of the upper pivot bearing assembly, and a lower main bearing ball for engaging the same other of the actuator and the base and for making rolling contact against the plurality of small bearing balls of the lower pivot bearing assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.