Patent ID: 7238006

Claim:
A fan, comprising: a shroud having an air inlet orifice, an air outlet orifice, and a confined space there between; air permeable protective covers secured to each of the air inlet orifice and the air outlet orifice; a motor having an elongated drive shaft, the motor being secured to the shroud with the drive shaft extended along a longitudinal axis thereof between the air inlet orifice and the air outlet orifice; a plurality of impellers secured in tandem to the elongated drive shaft; and wherein the air permeable protective cover secured to the air outlet orifice further comprises a directional grille having a plurality of individual spaced-apart baffle surfaces being structured for directing at least a portion of an air stream generated by the impellers within the confined space of the shroud into a zone directly adjacent to the grille at an approximate center thereof and in substantial axial alignment with the longitudinal axis of the shroud and the drive shaft of the motor.