Spindle motor and magnetic fluid seal apparatus used therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 28, 1995
Grant Date -
N/A
app pub date -
Aug 4, 1993
filing date -
Aug 7, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spindle motor comprising a stationary member, a hub rotatably supported on the stationary member via a pair of bearing members, and a magnetic fluid seal disposed outwardly of at least one of the pair of bearing members. A passageway or conduit hole is provided to conduct between an annular space separated by the stationary member, the magnetic fluid seal means, the rotor and the other of the bearing member and the inside of the motor. Furthermore, a magnetic fluid holder in the magnetic fluid seal is provided.
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