Patent ID: 6015265
Filing Date: 2000-01-18
Classification: F04D

Abstract:
A box fan which includes an open housing of square configuration, a fan motor mounted to said housing, a rotatable hub mounted to and driven by said motor, a plurality of fan blades on said hub, an open rear grill mounted to said housing and an open front grill mounted to said housing, the improvement which comprisessaid front grill has a center plate,a plurality of concentric circular ribs spaced outwardly from said center plate of increasing diameter,a rim extending around the perimeter of said front grill,a plurality of spaced radial ribs connecting selected concentric circular ribs and extending to said rim,a plurality of spaced concentric circular rib lengths connecting the corners of said front grill,an air divider ring spaced inwardly of said rib lengths connecting the corners of said front grill with selected radial ribs, connected thereto and to said rim, andsaid air divider ring having a substantially greater width than said concentric circular ribs.