Motor-fan assembly having a tapered stationary fan with a concave underside
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United States of America Patent
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Nov 27, 2012
Grant Date -
Sep 8, 2011
app pub date -
Mar 3, 2010
filing date -
Mar 3, 2010
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A motor-fan unit includes an end plate assembly, a motor assembly supported by the end plate assembly, and a shaft rotated by the motor assembly and extending through the end plate assembly. The fan assembly further includes a discharge shell, a tapered stationary fan which has a concave underside, and a rotating fan secured to the rotatable shaft and disposed between the discharge shell and the stationary fan. The tapered stationary fan includes a fan side which is substantially parallel and aligned with the frusto-conical shape of the fan disc of the rotating fan. A tapered fan shell is supported by the discharge shell and held in place by the stationary fan. A fan shroud secures the stationary fan and the fan shell to the discharge shell to prevent damage to a rotating fan secured to the shaft and positioned between the fan shroud and the stationary fan.
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