Patent ID: 8192146

Claim:
A turbine blade, comprising: a generally elongated blade having a leading edge, a trailing edge, a tip at a first end, a root coupled to the blade at an end generally opposite the first end for supporting the blade and for coupling the blade to a disc, and at least one cavity forming a cooling system in the blade; wherein the cooling system is formed from first and second cooling channels extending throughout internal aspects of the generally elongated blade, wherein the first cooling channel extends throughout a first section between the leading edge and a midchord region and the second cooling channel extends throughout a second section between the midchord region and the trailing edge; a first tip cooling channel in communication with the first cooling channel and extending along the tip from proximate to the leading edge to a position proximate to the trailing edge; and a second tip cooling channel in communication with the second cooling channel, positioned at least partially radially inward of the first tip cooling channel such that at least a portion of the first tip cooling channel is positioned between the tip and second tip cooling channel, and the second cooling channel extends generally along the tip from about the midchord region to a position proximate to the trailing edge.