Air bladder apparatus for positioning a magnetic head
US4862302A · kind A · utility
Inventor
Key dates
| Filing date | May 27, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an actuator for the recording and reading of information on a magnetic memory disk of the type having a pair of flexures suspended from a support arm, a low mass pneumatic apparatus for bringing a magnetic head into proximity with a disk. The support arm includes upper and lower bodies which are spaced apart to straddle a magnetic memory disk. Each of the support arm bodies is fixed to one end of a flexure. The end of each flexure opposite the support arm bodies has a read/write head. The flexures and heads are spring biased into an unload position away from the magnetic memory disk. Independent gas impermeable elastic bladders are operatively coupled to the support arm bodies and the flexure members to exert a force which bends the flexures relative to the support arm. Expansion of the elastic bladders provide a force which exceeds the spring biasing, thereby moving the heads into a load position in data transfer engagement with the magnetic disk. The elastic bladders and the head suspension assembly provide a low mass load-unload device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.