Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1997-12-19
2000-11-07
Klimowicz, William
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
384110, G11B 1702, F16C 3206
Patent
active
061445231
ABSTRACT:
A hydrodynamic bearing useful as a bearing cartridge or as the cartridge may be incorporated into a spindle motor or the like, where the bearing includes a stationary shaft and two independent bearings, comprising a top cone and a bottom cone separated by a segment of the shaft. The bearing includes a sleeve rotating around and surrounding the shaft, and the top cone and bottom cone and defining a narrow gap between the sleeve and the shaft and cones. Sealing plates are supported on the sleeve to seal off the ends of the bearing and are located along the shaft beyond the cones. A gap also exists between an interior surface portion of each cone and the shaft. Thus, separate flow paths are established, one around the top cone and one around the bottom cone. By providing two independent paths, the flow rates do not have to be the same in each conical flow path for the bearing seals to function properly.
REFERENCES:
patent: 4223958 (1980-09-01), Gray
patent: 4795275 (1989-01-01), Titcomb et al.
patent: 4798476 (1989-01-01), Sakatani et al.
patent: 5112142 (1992-05-01), Titcomb et al.
patent: 5559651 (1996-09-01), Grantz et al.
patent: 5623382 (1997-04-01), Moritan et al.
Addy Roger Allen
Grantz Alan Lyndon
Murthy Samnathan
Parsoneault Steve
Rahman Mohamed Mizanur
Klimowicz William
Seagate Technology LLC
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