Disk-centering mechanism for use with a high-density flexible disk
US4458278A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1982 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Apr 29, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/0035
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for the very precise centering of a flexible recording disk (2) onto a disk-drive spindle (8), for clamping it firmly for spinning, and for the easy removal thereof. Disk (2) is provided with a reinforced center hole (4) so that it can be manufactured to a tight tolerance. Spindle (8) is provided with a precision-alignment cylinder (12) over which the disk must slide in order to rest on a spindle seat (6). Once disk (2) is resting on spindle seat (6), it is clamped there by a self-aligning, rotatable spindle cap (24), which is brought down on top of the disk. The disk is centered for sliding along the alignment cylinder through the action of a conical surface on cone (14). The cone (14) in its entirety may be part of spindle (8), or alternatively, in order to facilitate insertion and removal of the disk, part of the cone may be integral to the clamping-spindle cap (24), or be a retractable plug. Those parts which are movable are moved out of the way of the disk as it is slid in and out of the mechanism. A skid plate is provided to deflect the disk away from spindle (8) during insertion and removal and to keep it parallel to the spindle seat. This skid plate is moved ou…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.