Patent ID: 7534086

Claim:
A turbine engine ring seal comprising: a ring seal body having a radially inwardly concave surface, the ring seal body being shaped so as to form an extension transitioning in a first region into a forward span and in a second region into an aft span, the first and second spans being opposite each other and extending at an angle from the extension in a radially outward direction, the ring seal body having a first layer and a second layer, the first layer being made of a ceramic matrix composite, the second layer being made of a non-ceramic matrix composite material, the second layer having an inner surface and an outer surface, wherein the first layer is attached to one of the inner surface and the outer surface of the second layer, and further including a third layer made of a ceramic matrix composite, wherein the third layer is attached to the other one of the inner surface and the outer surface of the second layer.