×

In-line centrifugal fan

DC
  • US 7,048,499 B2
  • Filed: 06/14/2001
  • Issued: 05/23/2006
  • Est. Priority Date: 06/15/2000
  • Status: Expired due to Fees
First Claim
Patent Images

1. An axially extending inline centrifugal fan for circulating air within an ambient environment, the fan comprising:

  • (A) a conduit having an intake end and an outlet end;

    (B) an inlet cone disposed at the intake end for receiving air from the ambient environment;

    (C) an impeller disposed downstream of the inlet cone and including;

    (i) a centrally disposed wheel-back configured for rotation by an electric motor;

    (ii) a plurality of fan blades extending radially outwardly from the wheel-back operable to force air in the direction from the intake end to the outlet end; and

    (iii) a wheel cone fixedly attached to, and circumscribing the wheel blades; and

    (D) a drive chamber disposed downstream of the impeller including a plurality of radially extending straightening vanes operable to receive the forced air from the impeller and direct the air substantially axially downstream to the outlet end;

    whereinthe inlet cone has a discharge diameter of substantially 0.75 times a diameter defined by radial outermost edges of opposing fan blades;

    wherein the inlet cone has an axial length substantially between 0.17 and 0.21 times the diameter defined by the radial outermost edges of opposing fan blades.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×