Data storage apparatus with head displacement sensor
US5031055A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1988 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Oct 18, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage apparatus has a magnetic head opposed to a magnetic recording medium and movable relative to the medium so as to magnetically write or read data to or from the medium. A displacement sensor monitors a distance between the head and the medium. An actuator which supports the head is driven according to the monitored results so as to maintain constantly the distance. The actuator includes a vibrator for vibrating the head at a given frequency effective to produce air pressure against the medium. The head has a bottom face opposed to the medium and convexed outwardly toward the medium, and the medium is made of elastic material concavedly deformable in response to the air pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.