Patent 10087762 was granted and assigned to Hamilton Sundstrand on October, 2018 by the United States Patent and Trademark Office.
A turbine wheel is disposed about an axis and has a back face including a plurality of lobes disposed about a periphery of the back face. The lobes define scalloped areas therebetween. The scalloped areas are further defined by a radius BR2 that blends into a first lobe and into a radius BR1 that also blends into a flat area.