17-02-2022 дата публикации
Номер: US20220048326A1
Принадлежит:
A tire design for a heavy-duty vehicle of construction plant type has a crown reinforcement () radially on the inside of a tread () and radially on the outside of a carcass reinforcement (). The carcass reinforcement () has at least two carcass layers () having metal reinforcers coated in an elastomer compound. The carcass layers () have respective stiffnesses per unit width R1, R2. Metal reinforcers of a first carcass layer () form, with the circumferential direction (XX′), an angle A1, and those of the second carcass layer form an angle A2, such that the angles A1 and A2, and the stiffnesses R1 and R2, simultaneously satisfy the following three relationships: R1*sin 2(2*A1)+R2*sin 2(2*A2)≥(R1+R2)*) sin 2(30°), and ∥A1|-|A2∥<10°, and 0.7≤R1/R2≤1.3. The metal reinforcers have a critical compression buckling deformation DF at least equal to 2.5% and a compression elastic modulus MC at least equal to 10 GPa. 1. A tire for a heavy-duty vehicle of construction plant type , comprising:radially from the outside to the inside, a tread, a crown reinforcement and a carcass reinforcement,said crown reinforcement comprising at least one crown layer formed of elastic metal reinforcers coated in an elastomer compound making, with a circumferential direction (XX′), an angle A;said carcass reinforcement being made up of at least two carcass layers comprising metal reinforcers coated in an elastomer compound, said carcass layers having stiffnesses per unit width R1, R2, for the first and second layers, respectively, measured in the equatorial plane (XY),{'claim-text': [{'br': None, 'i': ['R', 'A', 'R', 'A', 'R', 'R'], '#text': '1*sin 2(2*1)+2*sin 2(2*2)(1+2)*sin 2(30°),\u2003\u2003a)'}, {'br': None, 'i': ['A', 'A'], '#text': '∥1|-|2∥<10°,\u2003\u2003b)'}, {'br': None, 'i': ['R', 'R'], '#text': '0.7≤1/2≤1.3,\u2003\u2003c)'}], '#text': 'wherein the metal reinforcers of a first carcass layer form, with the circumferential direction (XX′), an angle A1, and the metal reinforcers of a ...
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