Patent ID: 8827647

Claim:
A turbine rotor blade comprising: an airfoil extending from a platform and a root; the airfoil having a leading edge and a trailing edge with a pressure side wall and a suction side wall extending between the two edges; a multiple-pass serpentine flow cooling circuit formed within the airfoil; a first leg of the multiple-pass serpentine circuit extending along the leading edge of the airfoil and a last leg of the multiple-pass serpentine circuit extending along a trailing edge region of the airfoil; the first leg being an upward flowing leg and the last leg being a downward flowing leg; a first exit slot connected to the last leg and opening onto the trailing edge just above the platform; a second exit slot connected to the last leg and opening onto the trailing edge just below the platform; and, the first exit slot and the second exit slot both providing cooling to a fillet section of the airfoil.