Drive spindle assembly for disc file
US4101945A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1976 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Sep 7, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/2009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A drive spindle assembly for a disc recorder, and particularly one using a rigid disc, having a direct-coupled spindle shaft arrangement which includes a disc-support platform mounted concentrically at one end of the spindle shaft and a DC motor attached to the other end of the spindle shaft, which spaced bearings supporting the shaft medially between the motor and the support platform. Preferably, the motor is of the flat, compact printed circuit-rotor type known as a "pancake" motor, and the disc-support platform preferably incorporates air-impelling vanes on one side and bleed orifices extending through it, so that air is drawn along the spindle assembly to cool it, and then impelled outwardly over both sides of the recording disc to help aerodynamically fly the recording heads on a thin film of air over the surface of the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.