Patent ID: 7300242

Claim:
A turbine airfoil, comprising: a generally elongated hollow airfoil formed from an outer wall, and having a leading edge, a trailing edge, a pressure side, a suction side, a first end adapted to be coupled to a hook attachment, a second end opposite the first end adapted to be coupled to an inner endwall; and a cooling system in the outer wall of the hollow airfoil, comprising: at least one fluid supply channel; and at least one multi-chambered, metering orifice, comprising: a first diffusor formed from at least one cavity positioned in the outer wall of the generally elongated hollow airfoil; a first metering orifice extending from the at least one fluid supply channel to the first diffusor; a second diffusor formed from at least one cavity in an outer surface of the outer wall of the generally elongated hollow airfoil; and a second metering orifice positioned in the outer wall of the airfoil and creating a fluid pathway between the first diffusor and the second diffusor.