Patent ID: 7874804

Claim:
A multiple piece turbine rotor blade comprising: an airfoil with a leading edge and a trailing edge with a pressure side wall and a suction side wall both extending between the leading edge and the trailing edge; a root having a fir tree configuration for insertion into a slot of a rotor disk; the airfoil and the root are formed as a single piece; a single piece platform having a pressure wall side and a suction wall side; the pressure wall side having a curvature equal to a curvature of the pressure wall side of the airfoil; the suction wall side having a curvature equal to a curvature of the suction wall side of the airfoil; the pressure wall side of the platform having a forward and an aft half leg both with a fir tree configuration extending from a bottom side; the suction wall side of the platform having a forward and an aft half leg both with a fir tree configuration extending from a bottom side; and, the single piece airfoil and root are secured between two adjacent single piece platforms in which the two adjacent platforms form a full fir tree configuration aligned with the fir tree configuration of the root.