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Axial fan

  • US 8,297,945 B2
  • Filed: 06/28/2007
  • Issued: 10/30/2012
  • Est. Priority Date: 09/21/2006
  • Status: Active Grant
First Claim
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1. An axial fan comprising;

  • a motor having an axially extending side wall; and

    an impeller having;

    a hub that is rotationally driven by the motor; and

    a plurality of blades extending from the hub;

    the hub having;

    a circular end wall that is coaxial with a shaft of the motor; and

    an annular side wall extending axially from a periphery of the circular end wall such that the hub is open in a direction away from the end wall, the hub side wall having a plurality of sectors, each sector supporting one of the plurality of blades of the impeller and covering a portion of the side wall of the motor, the hub side wall further having a plurality of open areas alternating with the plurality of sectors, each open area exposing a portion of the side wall of the motor.

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