Self-locking outer air seal with full backside cooling

Claim 1

An air seal assembly for a turbine engine comprising a turbine case forming an outer portion of said turbine engine and a turbine rotor portion positioned for rotation within said turbine base, and wherein said air seal assembly comprises: (i) an air seal having a ceramic portion for limiting unrestricted air flow between said turbine rotor and said turbine case, said air seal having interlocking hook portions for attachment to a flange of said turbine case having mounting slots positioned therein; (ii) a full ring cover plate for mounting to said turbine case, said cover plate having a flange with slots formed to interlock with hooks on said air seal in a manner which locks said air seal into place (iii) an impingment box for restricting cooling air flow, from an annular plenum, the impingment box having flow restricting air holes for directing cooling air flow to substantially all of said ceramic seal portion most adjacent to the impingement box; and (iv) attachment means connecting said impingement box and said ceramic portion, said attachment means comprising local pedestals mounted away from edges of said ceramic portion to allow for enhanced seal flexibility and unrestricted cooling air flow adjacent to said seal portion.