Patent ID: 8182221

Claim:
A turbine rotor blade comprising: an airfoil section having a pressure side wall and a suction side wall; a cooling air cavity formed between the pressure side wall and the suction side wall; a pressure side tip rail and a suction side tip rail forming a squealer pocket on a tip floor; the pressure side tip rail being offset from the pressure side wall of the airfoil; the suction side tip rail includes an aft side wall that is both flush with the suction side airfoil wall and slanted in a direction towards the pressure side wall; and, both the pressure side tip rail and the suction side tip rail includes a flat top surface; the forward side walls of the pressure side tip rail and the suction side tip rail both include concave shaped deflector surfaces; and, radial cooling channels formed within the pressure side wall of the airfoil and connected to the pressure side and suction side tip rail deflectors to discharge cooling air into the deflectors.