Patent ID: 7712316

Claim:
A turbine blade comprising: a root, and an airfoil extending away from the root to a tip; a plurality of film cooling holes on an outer face of the airfoil, said airfoil having at least one internal cooling passage for receiving air from a source, and delivering air to said film cooling holes, and said plurality of film holes being formed in an array, with there being film holes spaced at different locations in a direction between a trailing edge and a leading edge of the airfoil, and also at different locations between the root and the tip of the airfoil; and said film cooling holes receiving air from said cooling passage through meter sections extending with a component in a direction from the tip towards the root, said meter sections extend at a first angle, with an extension of said meter section extending through to an outer wall of said airfoil, said meter sections communicating directly with said cooling passage and a diffused section of an outer end of said film cooling holes extending towards said tip from the meter section, said diffused section is formed at a different angle having a lesser component in the direction from said tip toward said root than said meter extending at.