Crash stop shock ring for the protection of disk drive motor bearings
US5894378A · kind A · utility
0Cited by
17References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1997 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Nov 25, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A technique for preventing damage to ball bearings in small form factor devices where the drive motor has at least one piezoelectric crash stop ring disposed about the shaft and inside the rotor of the motor. The crash stop ring must be dimensioned to permit only a small amount of movement of the rotor relative to the shaft. The permitted movement is less than the minimum movement which would cause damage to the elements of the ball bearing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.