Patent ID: 7958734

Claim:
A cover assembly disposed about a rotor in a gas turbine engine comprising: a first cover disposed about the rotor and comprising a forward end and an opposed aft end, said first cover associated with a case mounting structure that is fixed to an engine casing; a second cover disposed about the rotor and comprising a forward end and an opposed aft end, at least a portion of said first cover disposed radially outwardly from said second cover such that a first gap is formed between said first and second covers, said first gap receiving cooling air that cools said first and second covers; at least one sealing structure between said first and second covers, said sealing structure limiting leakage between said first gap and a hot gas path associated with a turbine section of the engine; and securing structure that couples said first cover to said second cover, said securing structure permitting relative radial movement between said first and second covers.