Patent ID: 9447692
Filing Date: 2016-09-20
CPC Classification: F01D,F05D

Claim Text:
1. A turbine rotor blade comprising: an airfoil extending from a root and a platform; a leading edge region and a trailing edge region; a pressure side wall and a suction side wall; a blade tip region; a main serpentine flow cooling circuit with a first leg located in the leading edge region and a last leg located in the trailing edge region; a mini serpentine flow cooling circuit located between the first leg and a second leg of the main serpentine flow cooling circuit and in the blade tip region; a trailing edge cooling air exit slot connected to the mini serpentine flow cooling circuit; a row of exit slots in the trailing edge region and connected to the last leg of the main serpentine flow cooling circuit; and, the last leg of the main serpentine flow cooling circuit ends just below the mini serpentine flow cooling circuit.