Patent ID: 6372005
Filing Date: 2002-04-16
Classification: B01D,F04D

Abstract:
A ceiling fan comprising:motor; a plate rotatably coupled with said motor, said plate having a first side, a second side, a center and a peripheral edge, said first side directed toward said motor, said second side directed away from said motor; a filtering media disposed proximate said peripheral edge of said plate and rotatable in conjunction with said plate; and a plurality of curved fan blades coupled with and extending away from said second side of said plate, said blades annularly disposed to define a central opening between the blades wherein air is pulled toward said blades and directed through said filtering media, each said blade has an inner edge and an outer edge, each said inner edge at a first distance from said center of said plate, each said outer edge at a second distance from said plate, said second distance greater than said first distance, each blade has an input angle and an output angle, said input angle defined by the orientation of the blade at the inner edge with respect to the radii at the inner edge, said output angle defined by the orientation of the blade at the outer edge with respect to the radii at the outer edge, wherein said input angle of each blade is greater than said output angle.