Electromagnet-actuated head latching apparatus
US4903157A · kind A · utility
32Cited by
16References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Mar 30, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A head retracting/latching apparatus for a hard or floppy disc drive includes a prong which is held during power-on conditions by an electromagnet at an unlatched position out of contact with the head assembly. When power is interrupted, the head assembly is energized to move the heads to a retracted "home" position. The prong is released by the electromagnet and moves by spring force towards a latched position contacting the head assembly to prevent its movement as long as power remains off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.