Motor-fan assembly having a tapered 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 fan secured to the rotatable shaft which is supported by the end plate assembly. The fan includes a fan disc having a substantially frusto-conical shape, a fan ring having a substantially frusto-conical shape, and a plurality of vanes connecting the fan disc to the fan ring such that the frusto-conical shapes are substantially parallel to one another. A diffuser with a tapered fan side is also provided between the fan and the end plate assembly, wherein the tapered fan side is substantially parallel with the fan disc.
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