Patent ID: 6095752
Filing Date: 2000-08-01
Classification: F04D

Abstract:
An impeller for a centrifugal blower, comprising:a hub adapted to mount onto a motor shaft of the centrifugal blower;a crown portion having a set of vanes for drawing air axially through an interior of the crown portion and for delivering the drawn air radially towards the outside; anda plurality of arms connecting the hub and the crown portion, the plurality of arms defining a generally concave bowl-shaped envelope, the plurality of arms being connected to the hub in a center of the bowl, with the crown portion at a periphery of the bowl,wherein at least one of the plurality of arms includes a rib proximal to a junction of the at least one of the plurality of arms with the hub, the rib extending in an axial plane and being on a side of the at least one of the plurality of arms facing into the concavity of the bowl.