15-09-2016 дата публикации
Номер: US20160263945A1
Принадлежит:
A tire tread comprises transverse incisions () and circumferential incisions () opening onto the tread surface, each incision having a mean radial depth E. The circumferential incisions have at the tread shoulder a mean circumferential radius of curvature R, a linear void ratio T, and an axial width L, and are spaced by length P from radial axis ZZ′ passing through the tire centre. The transverse incisions have at the tire shoulder a mean transverse radius of curvature R, a linear void ratio T, and an axial width L. The linear void ratio Tis greater than or equal to 0.8E/Rand less than or equal to 1.2E/R, the linear void ratio Tis greater than or equal to 0.8E/Rand less than or equal to 1.2E/R, T>T, and Lis greater than or equal to 0.2 mm and less than or equal to 1.5 mm. 1. A tire having an external perimeter , a tread arranged radially on the outside of a reinforcing belt of the tire , itself on the outside of a carcass reinforcement , said tread having an axial half-width L , a mean radial depth E , comprising a central median zone and two axially end zones , called shoulders of width L/2 , and comprising a tread surface intended to come into contact with the ground , said tread comprising a plurality of transverse incisions and of circumferential incisions opening onto the surface of the tread , each circumferential and transverse incision having a mean radial depth E; [{'sub': 'c', 'a mean circumferential radius of curvature of the shoulder R,'}, {'sub': 'c', 'a linear void ratio T, and'}, {'sub': 'c', 'an axial width L, the said circumferential incisions being spaced by a length P from a radial axis ZZ′ passing through the centre of the tire; and'}], 'at least one circumferential incision having at the shoulder [{'sub': 't', 'a mean transverse radius of curvature of the shoulder R,'}, {'sub': 't', 'a linear void ratio T, and'}, {'sub': 't', 'an axial width L,'}], 'transverse incisions having at the shoulder{'sub': 'c', 'wherein the linear void ratio Tis ...
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