Patent ID: 8950454
Filing Date: 2015-02-10
Classification: B60C,Y10S

Abstract:
1. A tire tread for civil engineering works vehicle, this tread having a tread surface intended to come into contact with the ground, this tread comprising a central part delimited by grooves of circumferential overall orientation, these grooves delimiting shoulder parts axially towards the outside of the central part, wherein each shoulder part is provided with a plurality of transverse grooves delimiting a plurality of blocks, the transverse grooves having a cross section of minimum area (ST) and being distributed substantially uniformly in the circumferential direction, wherein the central part comprises a plurality of grooves of transverse overall orientation uniformly distributed in the circumferential direction and delimiting, with the circumferential grooves, a plurality of blocks, each of these blocks comprising at least two channels under the tread surface, each channel opening into a transverse groove of a shoulder art and into two circumferential grooves, wherein the central part is provided with a plurality of channels extending transversely under the tread surface and passing right through the central part, wherein each channel comprises a first and a second end, these first and second ends opening into the grooves of circumferential overall orientation, wherein at least one end of each channel opens into a transverse groove of the shoulder parts, and wherein each channel has a cross-sectional area (SC) at least equal to 5% of the area of the minimum cross section (ST) of the transverse groove into which it opens.