Patent ID: 8226360

Claim:
A turbine nozzle comprising: a circumferentially continuous outer band integrally joined to a row of nozzle vanes extending radially inwardly therefrom said vanes having axially opposite leading and trailing edges, and including forward and aft pairs of flanges extending radially outwardly, said flanges being arranged in a first, second, third, and fourth flange sequence between forward and aft ends of said outer band corresponding with said leading and trailing edges of said vanes; and said second and said fourth flange each being crenelated circumferentially therearound with a row of merlons spaced circumferentially apart by corresponding crenels; a first expansion seal ring disposed in a forward groove between said first and second flanges; a second expansion seal ring disposed in an aft groove between said third and fourth flanges; and a first contraction seal ring disposed also in said aft groove axially between said second ring and said crenelated fourth flange.