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1. (WO2018104668) TYRE WITH A LIGHTENED CROWN REINFORCEMENT
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Pub. No.: WO/2018/104668 International Application No.: PCT/FR2017/053427
Publication Date: 14.06.2018 International Filing Date: 07.12.2017
IPC:
B60C 9/20 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
C
VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
9
Reinforcements or ply arrangement of pneumatic tyres
18
Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
20
built-up from rubberised plies each having all cords arranged substantially parallel
Applicants:
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN [FR/FR]; 12, Cours Sablon 63000 CLERMONT-FERRAND, FR
Inventors:
DEGEORGES, Agnès; FR
LARDJANE, Aurore; FR
Agent:
LE CAM, Stéphane; FR
Priority Data:
16 6205307.12.2016FR
Title (EN) TYRE WITH A LIGHTENED CROWN REINFORCEMENT
(FR) PNEUMATIQUE COMPORTANT UNE ARMATURE DE SOMMET ALLEGEE
Abstract:
(EN) The invention relates to a tyre comprising a crown reinforcement composed of at least two working crown layers of reinforcing elements (42, 43), the reinforcing elements of the working crown layer that is radially outermost being distributed according to a pitch P, and at least one protective layer (44). According to the invention, the reinforcing elements of the working crown layers are metal cords having a diameter of less than 1.3 mm, at least one strand of each metal cord of at least one working crown layer being of at least UHT grade, the ratio Ej/P being strictly greater than 0.56 and the ratio E2/P being strictly greater than 0.30.
(FR) L'invention concerne un pneumatique comprenant une armature de sommet formée d'au moins deux couches de sommet de travail d'éléments de renforcement (42, 43), les éléments de renforcement de la couche de sommet de travail radialement la plus extérieure étant répartis avec un pas P, et d'au moins une couche de protection (44). Selon l'invention, les éléments de renforcement des couches de sommet de travail sont des câbles métalliques présentant un diamètre inférieur à 1.3 mm, au moins un fil de chaque câble métallique d'au moins une couche de sommet de travail est de grade au moins UHT, le ratio, Ej/P est strictement supérieur à 0.56 et le ratio E2/P est strictement supérieur à 0.30.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)