Cooling Fan
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
N/A
Issued Date -
Dec 25, 2014
app pub date -
Apr 29, 2014
filing date -
Jun 19, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A cooling fan includes a fan frame, a stator unit and an impeller. The fan frame includes a balancing member having a shaft-coupling portion. A lateral wall portion is formed on the balancing member and includes an air inlet and an air outlet. The stator unit has a base plate and a coil unit. The impeller has a permanent magnet and a shaft rotatably coupled with the shaft-coupling portion. An air gap is formed between the permanent magnet and the coil unit. A first annular reference plane extends through the outer annular face of the permanent magnet, and a second annular reference plane extends through the inner annular face of the permanent magnet. A magnetic attraction range is formed between the balancing member, the permanent magnet and the first and second annular reference planes. The balancing member is at least partially shaded from the permanent magnet by the base plate.
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