# US 10,767,288 B2 · Preform for a curved composite stiffener for an axisymmetric part such as a collar

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,767,288 B2
- Document ID: US10767288B2
- Status: Granted
- Kind: B2
- Application number: 15/454,022
- Filed: 2017-03-09
- Published: 2017-06-22
- Granted: 2020-09-08
- Earliest claimed: 2014-09-10
- Assignees: Safran Nacelles
- Applicants: Safran Nacelles
- Inventors: Benjamin Provost; Julien Lorrillard; Bertrand Desjoyeaux; Michel Rognant
- Web page: https://patentgrep.com/patent/US10767288B2

## CPC

- D03D 25/005: {Three-dimensional woven fabrics}
- B29B 11/16: comprising fillers or reinforcement {(non-woven fabrics per se D04H1/00, D04H3/00)}
- B29C 70/24: oriented in at least three directions forming a three-dimensional [3D] structure
- D03J 1/00: Auxiliary apparatus combined with or associated with looms
- F01D 5/282: {Selecting composite materials, e.g. blades with reinforcing filaments}
- F01D 9/00: Stators
- F01D 9/04: forming ring or sector
- F01D 25/24: Casings (modified for heating or cooling F01D25/14); Casing parts, e.g. diaphragms, casing fastenings (casings for rotary machines or engines in general F16M {; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045})
- F01D 25/243: {Flange connections; Bolting arrangements (F01D25/265 takes precedence)}
- F01D 25/246: {Fastening of diaphragms or stator-rings}
- F01D 25/265: {Vertically split casings; Clamping arrangements therefor}
- B29K 2307/04: Carbon
- D10B 2505/02: Reinforcing materials; Prepregs
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- D03D: WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- B29B: PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- D03J: AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The present disclosure concerns a preform for a curved composite stiffener for an axisymmetric part such as a shroud, including at least one web and at least one flange curved about an axis of revolution of the preform and defining a substantially “T” or an “I” shaped section. In one form, the preform includes a web and a flange, wherein the web includes a plurality of warp yarns circumferentially oriented relative to the axis of revolution of the preform, and a plurality of weft yarns oriented radially relative to said axis, and the flange includes a plurality of warp yarns circumferentially oriented relative to the axis of revolution of the preform, and a plurality of weft yarns substantially parallel to said axis.

## Claims

### Claim 1

A preform for a curved composite stiffener for an axisymmetric part comprising at least one web and at least one flange curved about an axis of revolution of said preform and defining at least one of a “T” and an “I” shaped section, wherein:
the at least one web comprises a plurality of warp yarns circumferentially oriented relative to the axis of revolution of the preform to define web warp yarn layers, and a plurality of weft yarns oriented radially relative to said axis of revolution, wherein the weft yarns are inserted between the warp yarns so as to define a binding zone of the warp yarn layers to each other by the weft yarns; and
the at least one flange comprises a plurality of warp yarns circumferentially oriented relative to the axis of revolution of the preform to define flange warp yarn layers, and a plurality of weft yarns parallel to said axis of revolution to define an unbinding zone in which the flange warp yarn layers are not bound by the weft yarns.

### Claim 2 (depends on 1)

The preform according to claim 1, wherein the plurality of warp yarns of the at least one flange of the preform have identical lengths, and the plurality of warp yarns of the web of the preform have varied lengths.

### Claim 3 (depends on 1)

A curved composite stiffener for an axisymmetric part comprising at least one preform according to claim 1.

### Claim 4 (depends on 3)

An axisymmetric part reinforced by at least one stiffener according to claim 3.

### Claim 5 (depends on 1)

A method for manufacturing the preform according to claim 1, said method comprising the following steps:
taking-up the warp yarns directly out of a loom onto a take-up mandrel having at least one conical portion and at least one of a conical and a cylindrical portion;
inserting the weft yarns so as to define the binding zone and the unbinding zone of warp yarn layers; and
unfolding an obtained preform to obtain said at least one web and said at least one flange.