Patent ID: 8157505

Claim:
A turbine blade comprising: an airfoil including an airfoil outer wall extending radially outwardly from a blade root; a blade tip surface located at an end of said airfoil distal from said root, said blade tip surface including pressure and suction edges joined together at chordally spaced-apart leading and trailing edges of said airfoil; a squealer tip rail located adjacent to said blade tip surface and comprising a deflector portion, an intermediate portion extending from said deflector portion and an aft portion extending from said intermediate portion, wherein a substantial part of said deflector portion is located generally mid-way between said blade tip surface pressure and suction edges; cooling structure directing cooling fluid into said squealer tip rail deflector portion; and cooling passages extending to said airfoil outer wall at a location radially inwardly from an intersection of said outer wall and said blade tip surface pressure edge, said cooling passages being in communication with a cooling fluid circuit within said airfoil and angled so as to release cooling fluid in a direction away from said blade tip surface.