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1. (WO2017149221) TYRE CROWN REINFORCEMENT MADE UP OF TWO WORKING CROWN LAYERS
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Pub. No.: WO/2017/149221 International Application No.: PCT/FR2017/050395
Publication Date: 08.09.2017 International Filing Date: 23.02.2017
IPC:
B60C 3/04 (2006.01) ,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
3
Tyres characterised by transverse section
04
characterised by the relative dimensions of the section, e.g. low profile
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:
FOURNIER, Orel; FR
BESTGEN, Luc; FR
Agent:
LE CAM, Stéphane; FR
Priority Data:
16/5176702.03.2016FR
Title (EN) TYRE CROWN REINFORCEMENT MADE UP OF TWO WORKING CROWN LAYERS
(FR) ARMATURE DE SOMMET DE PNEUMATIQUE CONSTITUEE DE DEUX COUCHES DE SOMMET DE TRAVAIL
Abstract:
(EN) The invention relates to a tyre, the aspect ratio H/L of which is strictly greater than 0.75, comprising a crown reinforcement (4) made up of two working crown layers (41, 42) of reinforcing elements. According to the invention, the two working crown layers (41, 42) are only present to form the crown reinforcement (4) over at least 40% of the width of the tread (5), the absolute value of the difference between the absolute values of the angles a2 and a1 being greater than 9°, a2 being greater than a1 in absolute terms, the average angle a satisfying the relationship 14+131 *exp(-L/100) < a < 20+164 *exp(-L/100), and the utilization ratio of the breaking potential F2/FR2 of the radially outermost working layer (42) being less than 1/6.
(FR) L'invention concerne un pneumatique, dont le rapport d'aspect H/L est strictement supérieur à 0,75, comprenant une armature de sommet (4) constituée de deux couches de sommet de travail (41, 42) d'éléments de renforcement. Selon l'invention, les deux couches de sommet de travail (41, 42) sont seules présentes pour constituer l'armature de sommet (4) sur au moins 40% de la largeur de la bande de roulement (5), la valeur absolue de la différence entre les valeurs absolues des angles a2 et al étant supérieure à 9°, a2 étant plus grand que al en valeur absolue, l'angle moyen a satisfaisant la relation 14+131 *exp(-L/100) < a < 20+164 *exp(-L/100), et le ratio d'utilisation du potentiel de rupture F2/FR2 de la couche de travail (42) radialement la plus extérieure étant inférieur à 1/6.
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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, 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)