Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1994-11-09
1996-07-16
Cummings, Scott W.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277235A, F16J 1553
Patent
active
055360203
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 conduit hole is provided to conduct between an annular space stipulated by the stationary member, the magnetic fluid seal, the rotor and the other of the bearing member and the inside of the motor. Furthermore, a magnetic fluid holder means in the magnetic fluid seal is improved.
REFERENCES:
patent: 5001581 (1991-03-01), Elsasser et al.
patent: 5006943 (1991-04-01), Elsasser et al.
patent: 5009436 (1991-04-01), Endo et al.
patent: 5050891 (1991-09-01), Ishikawa
patent: 5125313 (1993-06-01), Yokouchi et al.
Hayashi Misako
Matsumoto Hiroshi
Cummings Scott W.
Nidec Corporation
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