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1. (WO2019063919) LIGHTWEIGHT TYRE
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Pub. No.: WO/2019/063919 International Application No.: PCT/FR2018/052326
Publication Date: 04.04.2019 International Filing Date: 24.09.2018
IPC:
B60C 15/06 (2006.01) ,B60C 15/00 (2006.01) ,B60C 9/02 (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
15
Tyre beads, e.g. ply turn-up or overlap
06
Flipper strips, fillers, or chafing strips
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
15
Tyre beads, e.g. ply turn-up or overlap
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
02
Carcasses
Applicants:
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN [FR/FR]; 23 Place des Carmes-Déchaux 63000 Clermont-Ferrand, FR
Inventors:
LICENSE, William; FR
DAYET, Patrick; FR
BESTGEN, Luc; FR
Agent:
LE CAM, Stéphane; FR
Priority Data:
17/5896527.09.2017FR
Title (EN) LIGHTWEIGHT TYRE
(FR) PNEUMATIQUE ALLEGE
Abstract:
(EN) The invention relates to a tyre 1, of the heavy duty vehicle type, which is intended to be mounted on a hollow rim of the 15° drop centre type, comprising a crown reinforcement 6 consisting of a working crown layer 42 of reinforcing elements forming, with the circumferential direction, an angle (alpha2) of between 18° and 55°, and a layer 41 of circumferential reinforcing elements. According to the invention, in the crown region, the reinforcing elements of the layer of the carcass reinforcement 2 form, with the circumferential direction, an angle (a1) of less than 75°, said angles (a1) and (a2) being oriented on either side of the circumferential direction, radially on the inside of the crown reinforcement 6, the rupture potential index F2/FR2 of the working layer 42 being less than 1/6, and in a meridian section of said tyre, the turn-up of the carcass reinforcement layer and the main part of the carcass reinforcement layer 2 are the only layers of reinforcing elements with an elongation at break of less than 6% that are present in the sidewall.
(FR) L'invention concerne un pneumatique 1 de type poids lourd, destiné à être monté sur une jante creuse de type 15° drop centre, comprenant une armature de sommet 6 constituée d'une couche de sommet de travail 42 d'éléments de renforcement faisant avec la direction circonférentielle un angle (alpha2) compris entre 18° et 55° et d'une couche 41 d'éléments de renforcement circonférentiels. Selon l'invention, dans la zone du sommet, les éléments de renforcement de la couche de l'armature de carcasse 2 font avec la direction circonférentielle un angle (al) inférieur à 75°, lesdits angles (al) et (a2) étant orientés de part et d'autre de la direction circonférentielle, radialement à l'intérieur de l'armature de sommet 6, le ratio d'utilisation du potentiel de rupture F2/FR2 de la couche de travail 42 étant inférieur à 1/6, et dans une coupe méridienne dudit pneumatique, le retournement de la couche d'armature de carcasse et la partie principale de la couche d'armature de carcasse 2 sont les seules couches d'éléments de renforcement dont l'allongement à rupture est inférieur à 6 % présentes dans le flanc.
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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)