Patent ID: 8182218

Claim:
A fan assembly, comprising: a substantially cylindrical casing having an open end; fan blades mounted in said substantially cylindrical casing; a fan motor located within said substantially cylindrical casing for rotating said fan blades; and, a grille extending over the open end of said substantially cylindrical casing, said grille including: an annular peripheral portion lying in a grille plane; and, a plurality of curved blades extending from a central portion of said grille to said annular peripheral portion, said curved blades being at a minimum angle to a normal plane normal to the grille plane at said central portion of said grille and a maximum angle to the normal plane at said annular peripheral portion, wherein, air is able to be drawn into said substantially cylindrical casing through said grille for rotating the air about a central axis of said substantially cylindrical casing for striking, and thereby moving, said fan blades at an angle for permitting efficient operation of said fan assembly.