US 12,241,184 B2
Method for manufacturing a ring sector
Thierry Guy Xavier Tesson, Moissy-Cramayel (FR); Eric Philippe, Moissy-Cramayel (FR); Marie Lefebvre, Moissy-Cramayel (FR); and Aline Planckeel, Moissy-Cramayel (FR)
Assigned to SAFRAN CERAMICS, Le Haillan (FR)
Appl. No. 17/616,604
Filed by SAFRAN CERAMICS, Le Haillan (FR)
PCT Filed Jun. 3, 2020, PCT No. PCT/FR2020/050952
§ 371(c)(1), (2) Date Dec. 3, 2021,
PCT Pub. No. WO2020/245545, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 1905867 (FR), filed on Jun. 3, 2019.
Prior Publication US 2022/0235498 A1, Jul. 28, 2022
Int. Cl. D03D 25/00 (2006.01); D06M 23/00 (2006.01)
CPC D03D 25/005 (2013.01) [D06M 23/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A three-dimensionally woven multilayer fibrous structure having the same number of warp yarns woven at any level along the warp direction, the fibrous structure comprising, in the warp direction, a first part and a second part,
the first part having a thickness measured in a direction perpendicular to the warp and weft directions, greater than the second part,
characterised in that
the spacing between two weft planes along the warp direction is greater in the second part than in the first part, and
in that the number of weft yarns per weft plane of the second part is lower than the number of weft yarns per weft plane of the first part,
the first part of the fibrous structure comprising a first portion and a second portion, the first portion being arranged in said perpendicular direction, over a second portion and being structurally independent of the second portion, said first portion and second portion of the first part being woven to the second part at a transition from the first part to the second part.