Patent ID: 6139277
Filing Date: 2000-10-31
Classification: F01D,F04D

Abstract:
A motorized fan, comprising:a motor having a shaft extending longitudinally along an axis and with a preferred direction of rotation;an impeller assembly connected to said shaft and including a hub along the axis;said hub having a plurality of longitudinally extending tapered recesses each with a downward and forward sloping interior wall relative said axis;a plurality of tapered shoes removably mounted in said recesses and longitudinally extending forward into said recesses,each shoe having a face releasably engaging said interior wall;said assembly having a selectively releasable longitudinally forward directed force actuator engaging the rear portion of said shoes,and wherein said recesses are blind and continue for a first length and said shoes enter said recesses for a second length less than the first length such that when fully seated a space remains in said recess forward of said shoe.