Piezoelectric actuator and shock sensor
US6744577B1 · kind B1 · utility
13Cited by
8References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2001 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Feb 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dual purpose piezoelectric element utilized in a disk drive for fine positioning of the head assembly relative to the surface of a disk and for sensing shocks and other vibrations. When a shock is sensed by the piezoelectric element that exceeds a predetermined threshold value, write operations are halted to prevent a write operation occurring at an incorrect location on the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.