Recording disk apparatus and rotational supporting structure the

Details Recording disk apparatus and rotational supporting structure the Recording disk apparatus and rotational supporting structure the

1994-12-13

1997-08-19

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

384112, 384118, 384123, 310 90, G11B 1708, F16C 3206

Patent

active

056594453

ABSTRACT:
A recording disk apparatus comprises a clearance between a shaft and a thrust bearing portion tapered in a circumferential direction, a lubricant communication groove of a bearing covered by the shaft so that a lubricant on a radial bearing portion communicates with the lubricant on the thrust bearing portion through the lubricant communication groove, a lubricant circulating path which extends axially from the thrust bearing portion to the radial bearing portion to prevent the lubricant flowing out of the thrust bearing portion from returning directly to the thrust bearing portion without passing the radial bearing portion, and/or a clearance between a slide bearing and a magnetic fluid seal device substantially filled with a magnetic fluid lubricant.

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