Spindle clamp having a unitary lock member
US5048005A · kind A · utility
Inventor
Key dates
| Filing date | Oct 10, 1989 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Oct 10, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B17/0282
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spindle clamp for suppporting a data disk, wherein the spindle clamp includes a hub mounted for rotation about a central axis. The upper portion of the hub has a frustroconically-shaped bearing surface and has a disk-seating surface at the base of the bearing surface. A lock member has a downwardly-depending portion which is axially mounted such that the lower extremity of the lock member contacts the frustroconically-shaped bearing surface. The lock member is a unitary, cup-shaped member made of an elastically flexible material and preferably includes a plurality of axially-arranged fingers. Pneumatic or mechanical actuation of a piston within the hub is translated to the lock member to cause movement from a disk-releasing position to a disk-clamping position. Downward movement of the piston draws the lower extremities of the fingers along the bearing surface of the hub until the lock member reaches the disk-clamping position in which the fingers press a data disk against the disk-seating surface of the hub. A spring is utilized to bias the lock member in the disk-clamping position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.