Patent ID: 7341430

Claim:
A vane wheel for a torque converter comprising: a plurality of blades formed integrally with a shell in a casting process, wherein a blade tilts relative to an axial direction of the vane wheel and has an inner surface located on a positive pressure side thereof and an outer surface located on a negative pressure side thereof, in which a blade cross section along a circumferential direction from an axis center of the vane wheel contains a reference line of mold pullout direction defined by a tilt angle θ S (deg) relative to the axial direction, said tilt angle θ S defined by the following relation: θ S =tan −1 ( C×R ) in which R is a radial direction distance (m) from the axis center of the vane wheel and C is a shape parameter (rad/m), in which a tilt angle θ 1R of an inner side edge line and a tilt angle θ 2R of an outer side edge line of the blade cross section relative to the axial direction of the vane wheel satisfy the following relation: θ 1R =θ S −α and θ 2R =θ S +β in which parameters α and β are non-negative constants including zero for one of the parameters α and β.