Patent ID: 8414265

Claim:
A turbine blade comprising: a body having a leading edge, a trailing edge, a pressure side, a suction side, and a tip region; and a winglet arranged on the pressure side of the body in the tip region extending from one end of the winglet at a point in the tip region downstream of the leading edge of the body to an opposite end of the winglet at the trailing edge of the body, the winglet tapered from the trailing edge to the point in the tip region, such that a width of the winglet at the trailing edge is greater than a width of the winglet at the point in the tip region, wherein the turbine blade includes an interior cavity and a cooling passage communicative with the interior cavity and a port in the pressure side of the body, the port disposed radially inwardly on the turbine blade relative to the winglet, and the turbine blade includes a second passage in the winglet aligned co-linearly with the cooling passage.