Patent ID: 11891910
Assignee: SAFRAN AIRCRAFT ENGINES
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 3:
4. A gas turbine fan casing made of composite material with a fiber reinforcement comprising a plurality of superimposed turns of a fiber texture in the form of a strip having three-dimensional weaving between a plurality of layers of warp threads and a plurality of layers of weft threads, said fiber reinforcement being densified by a matrix, at least one stiffening element being interposed between a before-last turn and a last turn of the fiber texture, the stiffening element projecting over the outer surface of the before-last turn of the fiber texture and extending over the entire circumference of said before-last turn, the stiffening element having an axial section of omega-type shape,
wherein the fan casing has a revolution solid shape and is constructed and arranged to surround a fan of a gas turbine, and
wherein at least some warp threads of the plurality of layers of warp threads in the last turn of the fiber texture present at the level of an area covering said at least one stiffening element have a size or a tex less than the size or tex of the warp threads of the plurality of layers of warp threads present in the other turns of the fiber texture.