Tread having a maximum thickness PMU of material to be worn away during running, having: at least two grooves of circumferential overall orientation delimiting at least one intermediate row and two edge rows, a plurality of cuts of transverse overall orientation on each intermediate and edge row, representing, in the new state, a void of total volume Vco open onto the tread surface, at most equal to 13% of the total volume of the tread, channels or cavities extending under the tread surface in the new state, adapted to form new grooves after the tread has partially worn away, and having, in the initial state, a total volume Vcc at least equal to 30% of the total void volume Vco in the new state, intermediate rows of suffix (i) and edge rows of suffix (e) each provided with a plurality of cuts of transverse or oblique orientation distributed over each row evenly or near-evenly with a mean pitch of Pi and Pe respectively, having mean depths, Di and De respectively, which are at least equal to 20% of the thickness PMU and at most equal to thickness PMU, wherein: on the edge rows, Pe is such that 1.30<3.00, and on the intermediate rows, Pi satisfies 1.00<1.70, and Pe is greater than Pi.
Heavy goods vehicle driven axle tire tread
2017-09-19
Patent
Electronic Resource
English
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |
Tread for tire of a drive axle of a heavy goods vehicle and tire
European Patent Office | 2017
|TREAD FOR TIRE OF A DRIVE AXLE OF A HEAVY GOODS VEHICLE AND TIRE
European Patent Office | 2015
|