Timothy D Kuski

7758305, Jul 20, 2010

Oct 6, 2006

11/539485

Scott S. Kurszewski - Wittenberg WI,
Timothy Kuski - Mosinee WI,

Greenheck Fan Corporation - Schofield WI

F04D 29/44

415205, 415206

A centrifugal fan has an inlet bell that induces turbulence in the intake air stream so as to better distribute air across the rotating radial fan blades and thereby increase fan efficiency. The “turbulator” feature is one or more preferably arcuate surfaces integrally formed in the inlet bell to either project into or away from the intake air stream. The turbulator disrupts smooth air flow across the inside surface of the inlet bell has the effect of randomizing the air at the boundary layer to reduce separation of the air from the inlet bell as it leaves the inlet bell and enters the impeller. The air can thus follow the contour of the inlet bell more closely to make a tighter radius turn as it enters the impeller. In so doing, air is delivered across more of the fan blades so that output air flow is increased.

2003020, Nov 6, 2003

May 20, 2003

10/297450

Timothy Mathson - Mosinee WI,
Timothy Kuski - Mosinee WI,

F03B001/00

415/220000

An inline centrifugal mixed flow fan () includes an axially extending intake conduit (). An inlet cone () is disposed at an intake end (). An impeller () is disposed downstream of the inlet cone and includes a centrally disposed wheel-back () rotated by an electric motor (), plural fan blades () extending radially outwardly from the wheel-back and a wheel cone fixedly () attached to and circumscribing the wheel blades. A driver chamber () downstream of the impeller includes plural radially extending straight vanes () to direct air to an outlet end (). The fan is configured to achieve reduced sound level and increased efficiency.