Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-03-21
2006-03-21
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S06700R
Reexamination Certificate
active
07015611
ABSTRACT:
In a spindle motor, in an upper portion of a stator bearing surrounding wall32aof a bearing housing32, a flange32cprojecting outward in the radial direction from the stator bearing surrounding wall32ais provided, and a tapered face32eobtained in such a manner that the outer diameter of the bearing housing32gradually decreases downward from the flange32cis formed in the outer face of the stator bearing surrounding wall32a. A rotor2has a yoke23facing the bearing housing32in the radial direction and the air-fluid boundary is formed in a fifth clearance40between the tapered face32eand the inner face of the yoke23. By the yoke23and the flange32cwhich are fit to each other in a non-contact state, a detachment preventing structure is constructed.
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Kurino Mitsuhiro
Tokunaga Shinya
Judge Patent Firm
Lam Thanh
Nidec Corporation
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