Low profile hydrodynamic motor having minimum leakage properties

Details Low profile hydrodynamic motor having minimum leakage properties Low profile hydrodynamic motor having minimum leakage properties

1993-09-15

1995-10-10

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 0, 360 0, 310 67R, G11B 1702, H02K 708, H02K 516

Patent

active

054575885

ABSTRACT:
A spindle motor comprises a rotary sleeve; a rotor hub which is integrally rotated with the rotary sleeve; a stationary sleeve; and a stationary support extending upwardly from the stationary part, the rotary sleeve being fitted onto the outer peripheral surface of the stationary support, and radial and thrust hydrodynamic bearings being provided on the relative sliding surfaces of both rotary sleeve and stationary support. A pair of annular grooves which partially overlap each other in the axial direction are peripherally provided on the rotary sleeve and stationary support, thereby providing a labyrinth chamber to suppress the outflow of the lubricant.

REFERENCES:
patent: 2945730 (1960-07-01), Murray et al.
patent: 4348067 (1982-09-01), Tooley
patent: 5142173 (1992-08-01), Konno et al.
patent: 5246294 (1993-09-01), Pan
E. P. Stahl, Selection, Care and Installation of Anit-Friction Bearings,Dec. 1955, Machinery, pp. 174-178.

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