# US 10,371,222 B2 · Needled brake disks and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,222 B2 - Document ID: US10371222B2 - Status: Granted - Kind: B2 - Application number: 14/979,968 - Filed: 2015-12-28 - Published: 2017-06-29 - Granted: 2019-08-06 - Earliest claimed: 2015-12-28 - Assignees: Goodrich Corporation - Applicants: Goodrich Corporation - Inventors: Christopher Kirkpatrick - Web page: https://patentgrep.com/patent/US10371222B2 ## CPC - F16D 65/126: {the material being of low mechanical strength, e.g. carbon, beryllium; Torque transmitting members therefor} - B32B 5/22: characterised by the presence of two or more layers which {are next to each other and are fibrous, filamentary, formed of particles or foamed (layer formed of natural mineral fibres or particles next to a foam layer B32B19/047, next to a layer made of particles B32B19/048, or next to a fibrous or filamentary layer B32B19/06; paper layer or cardboard layer next to a paper layer or cardboard layer B32B29/005, next to a foam layer B32B29/007, next to a fibrous or filamentary layer B32B29/02, or next to a particulate layer B32B29/04)} - C04B 35/83: Carbon fibres in a carbon matrix - D04H 18/02: with needles - F16D 65/125: {characterised by the material used for the disc body} - C04B 2235/5248: Carbon, e.g. graphite - F16D 2200/0047: Ceramic composite, e.g. C/C composite infiltrated with Si or B, or ceramic matrix infiltrated with metal - F16D 2200/0052: Carbon - F16D 2200/0065: Inorganic, e.g. non-asbestos mineral fibres - F16D 2200/0082: Production methods therefor - F16D 2250/0023: Shaping by pressure - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - D04H: MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL (weaving D03; knitting D04B; braiding D04C; net-making D04G; sewing D05B; tufting D05C; finishing non-woven fabrics D06); FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING {; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION}(non-woven fabrics having an intermediate or external layer of a different kind, e.g. of woven fabric, B32B) ## Abstract The present disclosure provides a fibrous preform, comprising an annulus having at least one of an outer diameter portion or an inner diameter portion, the outer diameter portion extending radially inward from an outer diameter of the fibrous preform and the inner diameter portion extending radially outward from an inner diameter of the fibrous preform. In various embodiments, the fibrous preform further comprises a medial diameter portion disposed between the outer diameter and the inner diameter, wherein the medial diameter portion comprises a first needling profile, and the at least one of the outer diameter portion or the inner diameter portion comprises a second needling profile. In various embodiments, the first needling profile is less than the second needling profile. ## Claims ### Claim 1 A fibrous preform for an aircraft brake, comprising: two or more layers of oxidized polyacrylonitrile fiber (OPF) materials; an annulus formed from the two or more layers of OPF materials and having at least one of an outer diameter portion or an inner diameter portion, the outer diameter portion extending radially inward from an outer diameter of the fibrous preform and the inner diameter portion extending radially outward from an inner diameter of the fibrous preform; and a medial diameter portion disposed between the outer diameter and the inner diameter, wherein the medial diameter portion comprises a first needling profile, and the outer diameter portion comprises a second needling profile, wherein the first needling profile and the second needling profile are co-planar, wherein the second needling profile is about 25% to 50% greater than the first needling profile, wherein first fiber tow lengths on a first layer of the OPF materials are angled in a first direction, wherein the inner diameter portion comprises the second needling profile, and wherein second fiber tow lengths on a second layer adjacent the first layer of the OPF materials are angled in a second direction opposing the first direction. ### Claim 2 (depends on 1) The fibrous preform of claim 1, further comprising a heat affected zone disposed in the medial diameter portion, the heat affected zone configured to expand in response to an increase in temperature following a rejected take off. ### Claim 3 (depends on 2) The fibrous preform of claim 2, wherein the heat affected zone comprises a third needling profile, the third needling profile being about 25% to 50% less than the first needling profile, wherein the third needling profile and the second needling profile are co-planar. ### Claim 4 (depends on 3) The fibrous preform of claim 3, further comprising: an inner portion disposed between a first planar portion comprising the first needling profile, the second needling profile, and the third needling profile and a second planar portion comprising the first needling profile, the second needling profile, and the third needling profile, the first planar portion being disposed at a first axial end of the fibrous preform and adjacent to a first planar face of the fibrous preform and the second planar portion being disposed at a second axial end of the fibrous preform and adjacent to a second planar face of the fibrous preform; wherein the inner portion comprises a fourth needling profile, the fourth needling profile being about 25% to 50% greater than the first needling profile. ### Claim 5 A fibrous preform for an aircraft brake, comprising: two or more layers of oxidized polyacrylonitrile fiber (OPF) materials; an annulus formed from the two or more layers of OPF materials and having at least one of an outer diameter portion or an inner diameter portion, the outer diameter portion extending radially inward from an outer diameter of the fibrous preform and the inner diameter portion extending radially outward from an inner diameter of the fibrous preform; a medial diameter portion disposed between the outer diameter and the inner diameter, wherein the medial diameter portion comprises a first needling profile, and the outer diameter portion comprises a second needling profile, wherein the first needling profile and the second needling profile are co-planar, wherein the second needling profile is about 25% to 50% greater than the first needling profile, wherein first fiber tow lengths on a first layer of the OPF materials are angled in a first direction, and wherein second fiber tow lengths on a second layer adjacent the first layer of the OPF materials are angled in a second direction opposing the first direction, a heat affected zone disposed in the medial diameter portion, the heat affected zone configured to expand in response to an increase in temperature following a rejected take off, wherein the heat affected zone comprises a third needling profile, the third needling profile being about 25% to 50% less than the first needling profile, wherein the third needling profile and the second needling profile are co-planar.