Disk spindle motor

Details Disk spindle motor Disk spindle motor

1993-01-22

1994-06-21

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 384133, H02K 708, H02K 714, F16C 3374

Patent

active

053230760

ABSTRACT:
A disk spindle motor having a permanent magnet central shaft. A pair of annular, non-magnetic combination thrust and journal bearings having truncated-conical outer surfaces are spaced apart on the shaft. The bearings coact with complementary surfaces of the hub of a motor rotor. Shaft end caps connect the shaft to base means and have radially extending shoulders which define annular gaps with the rotor and function as ferrofluidic seals.

REFERENCES:
patent: 3232680 (1966-02-01), Clark
patent: 4043612 (1977-08-01), Orcutt
patent: 4254961 (1981-03-01), Fersht et al.
patent: 4673997 (1987-06-01), Gowda et al.
patent: 4694213 (1987-09-01), Gowda et al.
patent: 4734606 (1988-03-01), Hajec
patent: 4824122 (1989-04-01), Raj et al.
patent: 5038062 (1991-08-01), Shiraki
patent: 5124604 (1992-06-01), Swartz
patent: 5134331 (1992-07-01), Miyaji et al.

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