EP 3083279 A1 20161026 - APEX REINFORCEMENT OF A TYRE FOR A HEAVY CIVIL ENGINEERING VEHICLE
Title (en)
APEX REINFORCEMENT OF A TYRE FOR A HEAVY CIVIL ENGINEERING VEHICLE
Title (de)
APEX-VERSTÄRKUNG EINES REIFENS FÜR EIN SCHWERES HOCH- UND TIEFBAUFAHRZEUG
Title (fr)
ARMATURE DE SOMMET DE PNEUMATIQUE POUR VEHICULE LOURD DE TYPE GENIE CIVIL
Publication
Application
Priority
- FR 1362848 A 20131218
- EP 2014078157 W 20141217
Abstract (en)
[origin: WO2015091609A1] A radial tyre intended to be fitted to a heavy civil engineering vehicle and aimed at desensitizing the apex of such a tyre from shocks occurring essentially in the centre of the tread. This objective has been attained by a tyre (1) comprising an apex reinforcement (3) radially interior to a tread (2) and radially exterior to a carcass reinforcement (4), the apex reinforcement (3) comprising, radially from the exterior to the interior, a protective reinforcement (5), a working reinforcement (6) and an additional reinforcement (7). The protective reinforcement (5) comprises at least one protection layer (51, 52) including elastic metallic reinforcement pieces which form an angle of at least 10° with the circumferential direction. The working reinforcement (6) comprises at least two working layers (61, 62) having respectively an axial width (L61, L62) and including non-elastic metallic reinforcement pieces, crossed from one working layer to the next, and forming an angle of at most 60° with the circumferential direction. The additional reinforcement (7), axially centred on an equatorial plane of the tyre, comprises at least one additional layer (71, 72) having an axial width (L71, L72) equal to at most 0.9 times the smallest of the axial widths (L61, L62) of the at least two working layers (61, 62) and includes metallic reinforcement pieces forming an angle of at most 25° with the circumferential direction. According to the invention, at least one additional layer (71, 72) comprises an axial discontinuity (81, 82), axially centred on the equatorial plane of the tyre, and the width (D, D2) of the axial discontinuity (81, 82) is equal to at least 0.1 times the axial width (L71, L72) of the at least one additional layer (71, 72).
IPC 8 full level
CPC (source: EP US)
B60C 9/2006 (2013.01 - EP US); B60C 9/28 (2013.01 - EP US); B60C 2009/2016 (2013.01 - EP US); B60C 2009/2019 (2013.01 - EP US); B60C 2009/2041 (2013.01 - EP US); B60C 2200/06 (2013.01 - EP US); B60C 2200/065 (2013.01 - EP US)
Citation (search report)
See references of WO 2015091609A1
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)
FR 3014745 A1 20150619; FR 3014745 B1 20170210; BR 112016014281 A2 20170926; BR 112016014281 A8 20180102; CN 105745091 A 20160706; CN 105745091 B 20180601; EP 3083279 A1 20161026; JP 2017500246 A 20170105; US 2016318345 A1 20161103; WO 2015091609 A1 20150625
DOCDB simple family (application)
FR 1362848 A 20131218; BR 112016014281 A 20141217; CN 201480062776 A 20141217; EP 14825127 A 20141217; EP 2014078157 W 20141217; JP 2016541559 A 20141217; US 201415104877 A 20141217