EP 3310590 A1 20180425 - TYRE TREAD FOR A HEAVY CIVIL ENGINEERING VEHICLE
Title (en)
TYRE TREAD FOR A HEAVY CIVIL ENGINEERING VEHICLE
Title (de)
REIFENLAUFFLÄCHE FÜR EIN SCHWERES BAUFAHRZEUG
Title (fr)
BANDE DE ROULEMENT DE PNEUMATIQUE POUR VEHICULE LOURD DE TYPE GENIE CIVIL
Publication
Application
Priority
- FR 1555522 A 20150617
- EP 2016063551 W 20160614
Abstract (en)
[origin: WO2016202763A1] The present invention relates to the tread of a radial tyre for a heavy civil engineering vehicle, and aims to reduce the speed of wear thereof when used in mining. The tread is made up of a radial stack of a first portion (21) and a second portion (22) which is radially outside the first portion (21). The first portion (21) is made up of a radial stack of N layers C1i, each layer C1i having a substantially constant radial thickness E1i and consisting of a polymer material M1i having a dynamic shear modulus G1i. The second portion (22) is made up of a single layer C2, having a substantially constant radial thickness E2 and consisting of a polymer material M2 having a dynamic shear modulus G2. According to the invention, the following relations are simultaneously verified: a. 1/(E1/G1+E2/G2) > G0/(E1+E2), where E1 = Formula (I) where E1i, E1 and E2 are in mm, G1i, G1 and G2 are in MPa, and where 1 MPa ≤ G0 ≤ 1.8 MPa; b. G1 < G0; c. E1 ≥ E1 min. = 25 mm; d. G2 > G0 > G1; e. E2 ≤ E2 max. = 70 mm; and f. Formula (II) for 1 ≤ j ≤ N-1.
IPC 8 full level
B60C 11/00 (2006.01)
CPC (source: CN EP US)
B60C 9/0007 (2013.01 - US); B60C 9/18 (2013.01 - US); B60C 11/0008 (2013.01 - US); B60C 11/005 (2013.01 - CN EP US); B60C 2011/0025 (2013.01 - CN EP US); B60C 2011/0033 (2013.01 - CN EP US); B60C 2200/065 (2013.01 - CN EP US)
Citation (search report)
See references of WO 2016202763A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2016202763 A1 20161222; BR 112017025642 A2 20180807; CN 107743449 A 20180227; EP 3310590 A1 20180425; FR 3037532 A1 20161223; FR 3037532 B1 20170609; JP 2018521893 A 20180809; US 2018370287 A1 20181227
DOCDB simple family (application)
EP 2016063551 W 20160614; BR 112017025642 A 20160614; CN 201680034891 A 20160614; EP 16728707 A 20160614; FR 1555522 A 20150617; JP 2017564588 A 20160614; US 201615736977 A 20160614