Ball spindle for reduced friction rotary actuator in disk drive

Details Ball spindle for reduced friction rotary actuator in disk drive Ball spindle for reduced friction rotary actuator in disk drive

1994-11-14

1996-04-23

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

384610, G11B 554, F16C 1950

Patent

active

055109403

ABSTRACT:
A low friction bearing is provided for a mass balanced rotary voice coil actuator of a disk drive including a base. The bearing comprises an upper pivot bearing assembly fixed to one of the actuator and the base and including a plurality of small bearing balls in an outer bearing race thereof, a lower pivot bearing assembly fixed to the same one of the actuator and the base and including a plurality of small bearing balls in an outer bearing race thereof, an upper main bearing ball for engaging the other of the actuator and the base and for making rolling contact against the plurality of small bearing balls of the upper pivot bearing assembly, and a lower main bearing ball for engaging the same other of the actuator and the base and for making rolling contact against the plurality of small bearing balls of the lower pivot bearing assembly.

REFERENCES:
patent: 1121087 (1914-12-01), Golly
patent: 3610714 (1971-10-01), DeGaeta
patent: 3731985 (1973-05-01), De Gaeta
patent: 3766548 (1973-10-01), Abel
patent: 4116500 (1978-09-01), Huber
patent: 4326759 (1982-04-01), Rasmus
patent: 4367546 (1983-01-01), Shibata
patent: 4856918 (1989-08-01), Inoue et al.
patent: 5328271 (1994-07-01), Titcomb
Paul Baillio, "Jewel Bearings Solve Light Load Problems," Machine Design, Oct. 26, 1989 pp. 111-114.
NSK Datasheet for BCF Style Bearing Assemblies (undated).

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