Patent ID: 7223075

Claim:
A turbine wheel for driving rapidly rotating tools for rotating disks and/or domes of paint-spraying apparatus, said turbine wheel comprising: a carrier plate formed as a circular disk or ring, said plate having a central axis and configured for mounting so as to be rotatable about the axis; turbine blades disposed on the carrier plate in circular formation and curved in a direction perpendicular to the axis, said turbine blades comprising; a convex front face including a convex radially outer portion and a convex radially inward portion; and a convex back face, including a convex radially outer portion and a convex radially inward portion, wherein said front face and back face are mounted so that said front and back faces are axially parallel; wherein each of said faces has radially outer portions and radially inward portions with radii of curvature, such that at least portions of the front face have a lesser radius of curvature than both the radially outer and the radially outer portion of the concave back face, and the radially outer portions of the front face and of the back face have a lesser radius of curvature than the radially more inward portions of the front face and of the back face.