Patent ID: 8177484
Filing Date: 2012-05-15
Classification: F04D,F05D,Y10S

Abstract:
1. An impeller of a multiblade blower comprising: a plurality of circular support plates that rotate about an axis of rotation, each of the support plates having an outer peripheral portion and being constructed of resin; and a plurality of blades disposed on the outer peripheral portion of each of the circular support plates so as to be parallel to he axis of rotation, each of the blades being constructed of resin, each of the blades haying a tip with a plurality of cutouts to form a serrated shape and a step formed in a blade face at a position that is spaced a predetermined distance from the blade tip having the serrated shape, each cutout of each blade having a triangular shape with a pair of sides connected to each other at an inner peripheral side of the cutout, the two sides being inclined relative to each other such that straight lines extending along the two sides in a blade width direction from the blade tip intersect with each other at an intersection point, and the predetermined distance corresponding to a distance from the blade tip having the serrated shape to the intersection point.