Fan for electric machine
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United States of America Patent
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May 10, 2005
Grant Date -
N/A
app pub date -
Sep 11, 2002
filing date -
Sep 11, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fan for an electrical machine having discrete fan blades mounted for rotation with the machine rotor. Each blade has a unitary mounting plate and is secured to the machine rotor or to a carrier on the rotor shaft. The preferred blade has a concave surface facing axially of the rotor in one direction and a convex surface facing axially of the rotor in the other direction. The concave/convex surfaces are formed by two flat triangular surfaces joined along a common edge. The triangular structure is fatigue resistant, reducing, the likelihood of mechanical failure.
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