Air-bearing motor assembly for magnetic recording systems
US5283491A · kind A · utility
25Cited by
3References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1993 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Jan 11, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An electric motor for a magnetic disk memory device includes a conical hub and a conical plane or grooved base and an integral air-bearing which significantly reduces non-repeatable runout, audible noise, and vibration. The base is rigidly attached to the shaft while the hub, which carries all of the load, rotates on the air cushion created by a pressurized air film. An upper sleeve controls the pressure fluctuation in the air film in a dynamic condition. In a static condition, the hub rests on a dry lubricated surface. The force developed due to the pressurized air film balances the rotating member in any condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.