Patent ID: 6893220

Claim:
A centrifugal blower impeller, comprising: a central hub having a conical section and an outer edge, the conical section being centered with respect to a center axis and extending from the center axis towards the outer edge; a plurality of impeller blades having first and second ends, the conical section of the central hub intersecting the first ends of the impeller blades, the impeller blades extending axially upward from the first ends towards the second ends; and; a rim having a generally circular shape and being connected to the second ends of the impeller blades, the rim including a first portion and a second portion, wherein the first portion is generally parallel to the center axis, and the second portion is generally perpendicular to the center axis, the first and second portions having a generally L-shaped cross-section, the first portion of the rim has a first edge, the second ends of the blades extending past the first edge.