Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1994-03-10
1995-03-07
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
320 67R, 384450, H02K 516, F16C 1900
Patent
active
053961358
ABSTRACT:
A spindle motor having a housing, a hub member rotatable relative to the housing, a bearing means disposed between the housing and the hub member, a rotor magnet mounted on the hub member, and a stator disposed in a facing relationship with the rotor magnet. The hub member includes a supporting wall portion, which cooperates with the stator to constitute an air seal structure. A magnetic fluid seal means is provided at a position outward of the bearing means, and includes a conductive plate for grounding static electricity. The bearing means is comprised of a radial ball bearing, which includes certain improvement.
REFERENCES:
patent: 5274288 (1993-12-01), Stefansky
Iwazaki Kuniyasu
Ohta Kihachiro
LaBalle Clayton E.
Nippon Densan Corporation
Stephan Steven L.
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