Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1998-04-14
2000-09-12
Klimowicz, William
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
384107, 384132, G11B 1702, F16C 3206
Patent
active
061186201
ABSTRACT:
A hydrodynamic bearing system where the bearing includes a shaft and two independent bearings, comprising a top cone or bi-sphere and a bottom cone or bi-sphere separated by a segment of the shaft. The bearing includes a hub supported bearing element rotating around the shaft and the shaft supported top cone and bottom cone; complementary surfaces of said bearing element and said cone define a narrow gap between the bearing support element for the bearing fluid. Sealing plates or seal elements define a fluid gap with a radially extending face of the cone; a gap also exists between an interior surface portion of each cone and the shaft. These gaps are connected so that separate flow paths are established, one around the top cone or bi-sphere and one around the bottom cone or bi-sphere. By providing two independent bearings, the stator can be mounted to the shaft, facing magnets supported on the hub to form an in-hub motor. When the load or RPM changes, the fluid pressure or movement in each bearing may change but the function of the bearing and its ability to provide stiffness and stability to the system will not be lessened.
REFERENCES:
patent: 5112142 (1992-05-01), Titcomb et al.
patent: 5558445 (1996-09-01), Chen et al.
patent: 5559651 (1996-09-01), Grantz et al.
patent: 5716141 (1998-02-01), Chen
patent: 5847479 (1998-12-01), Wang et al.
patent: 5876124 (1999-03-01), Zang et al.
Grantz Alan Lyndon
Leuthold Hans
Murthy Samnathan
Parsoneault Norbert Steven
Rahman Mohamed Mizanur
Klimowicz William
Seagate Technology LLC
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