Patent ID: 8016551

Claim:
A radial inflow turbine nozzle housing assembly, comprising: a plurality of first and a plurality of second nozzle vanes disposed circumferentially around a center point, each of the first and second nozzle vanes including: a body having a leading edge, a trailing edge, an outer a surface, and an inner surface; and an attachment point positioned on a perimeter of a circle circumscribed around the center point, the outer surface being positioned further from the center point than the inner surface, said outer surface extending from said leading edge to said trailing edge, said outer surface having a concave shape, said inner surface extending from said leading edge to said trailing edge, said inner surface having a non-concave shape, wherein each of the first vanes is held in position with a first bolt passing through the first vane, wherein the first bolt is large enough to provide containment for broken parts if a wheel breaks due to overspeed in adverse circumstances, and wherein each of the second vanes is held in position with a second bolt having a diameter smaller than a diameter of the first bolt.