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Columnar air moving devices, systems and methods

  • US 20050202776A1
  • Filed: 12/30/2004
  • Published: 09/15/2005
  • Est. Priority Date: 03/15/2004
  • Status: Active Grant
First Claim
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1. An air moving device comprising:

  • a housing having an air inlet at a first end and an air outlet at a second end spaced from said first end with an air flow passage between said first and second ends, a rotary fan mounted in said housing near said air inlet and having an impeller with a plurality of blades that produce an air flow with rotary and axial air flow components, and a plurality of spaced, axially extending air guide vanes in said housing between said impeller and said air outlet for converting said rotary component of said air flow into combined laminar and axial air flow in said housing, said vanes being spaced from said impeller with a gap of having a selected size, said gap size being selected to be no greater than a selected maximum dimension to avoid generation of turbulence and reduce static back pressure in said air flow, whereby said air flow exits said air outlet in an axial stream extending beyond said air outlet in a columnar pattern with minimal lateral dispersion.

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