Patent ID: 6902372

Claim:
A turbine blade, comprising: a generally elongated blade having a leading edge, a trailing edge, and 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; the generally elongated blade formed from at least one outer wall defining the at least one cavity forming the cooling system; at least one first impingement rib positioned generally parallel to the trailing edge of the elongated blade and contacting the at least one outer wall; at least one second impingement rib oblique to the at least one first impingement rib and extending from the at least one first impingement rib toward the trailing edge; at least one third impingement rib oblique to the at least one first impingement rib, extending from the at least one first impingement rib toward the trailing edge, and intersecting the at least one second impingement rib, thereby forming at least one triangular cavity; at least one orifice in the at least one first impingement rib opening into the at least one triangular cavity; and at least one orifice in the at least one second impingement rib opening into the at least one triangular cavity.