Patent ID: 8152469

Claim:
A turbine ring rotor comprising: first and second annular tip shrouds defined about an axis; first and second annular bases defined about said axis; a multitude of first turbine blades mounted between said first annular tip shroud and said first annular base; a multitude of second turbine blades mounted between said second annular tip shroud and said second annular base, said second turbine blades spaced, relative to the axis, from said first turbine blades; wherein each of said first and second of turbine blades defines a turbine blade passage therethrough, each of said turbine blade passages extending through a respective one of said first and second annular tip shrouds and a respective one of said first and second annular bases; a base seal extending from said second annular base; wherein said first annular base includes an extended axial stepped ledge; and wherein said base seal engages said extended axial stepped ledge.