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1. WO2020065176 - TYRE HAVING A REDUCED-WEIGHT BEAD REGION

Publication Number WO/2020/065176
Publication Date 02.04.2020
International Application No. PCT/FR2019/052151
International Filing Date 16.09.2019
IPC
B60C 15/06 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
15Tyre beads, e.g. ply turn-up or overlap
06Flipper strips, fillers, or chafing strips
B60C 15/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
15Tyre beads, e.g. ply turn-up or overlap
B60C 9/04 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
9Reinforcements or ply arrangement of pneumatic tyres
02Carcasses
04the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
CPC
B60C 15/0054
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
0009features of the carcass terminal portion
0054with ply turn-up portion parallel and adjacent to carcass main portion
B60C 15/06
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
06Flipper strips, fillers, or chafing strips ; and reinforcing layers for the construction of the bead
B60C 2009/045
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
9Reinforcements or ply arrangement of pneumatic tyres
02Carcasses
04the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
0416Physical properties or dimensions of the carcass cords
045Tensile strength
B60C 2015/009
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
0009features of the carcass terminal portion
009Height of the carcass terminal portion defined in terms of a numerical value or ratio in proportion to section height
B60C 2015/0621
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
06Flipper strips, fillers, or chafing strips ; and reinforcing layers for the construction of the bead
0617comprising a cushion rubber other than the chafer or clinch rubber
0621adjacent to the carcass turnup portion
B60C 2015/0625
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
CVEHICLE TYRES
15Tyre beads, e.g. ply turn-up or overlap
06Flipper strips, fillers, or chafing strips ; and reinforcing layers for the construction of the bead
0617comprising a cushion rubber other than the chafer or clinch rubber
0625provided at the terminal edge portion of a carcass or reinforcing layer
Applicants
  • COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN [FR]/[FR]
Inventors
  • MANSUY, Philippe
  • DAYET, Patrick
  • BESTGEN, Luc
Agents
  • LE CAM, Stéphane
Priority Data
185868725.09.2018FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) TYRE HAVING A REDUCED-WEIGHT BEAD REGION
(FR) PNEUMATIQUE DONT LA ZONE DU BOURRELET EST ALLEGEE
Abstract
(EN)
The invention relates to a tyre with a radial carcass reinforcement formed by a single ply of reinforcement elements, turned up around a bead core such as to be anchored in each of the beads. According to the invention, the turn-up of the carcass reinforcement ply and the main part of the carcass reinforcement ply are coupled to one another, and these are the only plies of reinforcement elements present in the sidewall with an elongation at rupture of less than 6 %. The arrangement and selection of the polymer blends in the region of the bead of the tyre enhance the endurance performance regardless of driving conditions after ageing over a long period of time with inflation with high levels of oxidising agents.
(FR)
L'invention concerne un pneumatique à armature de carcasse radiale, constituée d'une unique couche d'éléments de renforcement ancrée dans chacun des bourrelets par retournement autour d'une tringle. Selon l'invention,le retournement de la couche d'armature de carcasse et la partie principale de la couche d'armature de carcasse sont couplés, le retournement de la couche d'armature de carcasse et la partie principale de la couche d'armature de carcasse sont les seules couches d'éléments de renforcement dont l'allongement à rupture est inférieur à 6 % présentes dans le flanc et l'agencement et le choix des mélanges polymériques de la zone du bourrelet du pneumatique favorisent les performances d'endurance quelles que soient les conditions de roulage après un vieillissement sur une longue période en étant gonflés avec des teneurs en agents oxydants élevées.
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