MOTOR AND FAN INCLUDING THE MOTOR
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United States of America Patent
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N/A
Issued Date -
Oct 1, 2015
app pub date -
Mar 10, 2015
filing date -
Mar 28, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A motor includes a stationary portion and a rotary portion. The stationary portion includes an armature, a circuit board, and a base portion. The base portion includes a bearing holder, a central tower portion configured to support the bearing holder and a wall portion which surrounds the circuit board at a radial outer side such that a radial gap is defined between the circuit board and the wall portion. The circuit board includes a through-hole defined at a center thereof, and the central tower portion supports a periphery of the through-hole. Filler material is filled at upper and lower sides of the circuit board, and the circuit board includes at least one exhaust hole. The radial gap and the at least one exhaust hole communicate with each other through an axial space between a lower surface of the circuit board and an upper surface of the base portion.
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