US 2019/0337338 A1 · Tread Having Hidden Cavities

Abstract

Tread (1) for a heavy-duty vehicle tire having a total thickness corresponding to the thickness of material to be worn away during running, this tread having, in the new state, a tread surface (10) intended to come into contact with a roadway when running, this tread (1) comprising at least one hidden cavity (2) intended to form a new groove opening onto the tread surface after a predetermined amount of partial wear, this hidden cavity (2) comprising two opposite lateral walls (21, 22) connected together by a bottom (23) radially towards the inside and by a crown part (24) radially towards the outside, the tread according to invention being characterized in that the crown part (24) of the hidden cavity is provided with a plurality of fine ribs (25) extending radially towards the inside of the hidden cavity (2) from the crown part (24) delimiting the hidden cavity.

Claims9

Dependent claims

A tread for a heavy-duty vehicle tire having a total thickness corresponding to the thickness of material to be worn away during running, the tread having, in the new state, a tread surface adapted to come into contact with a roadway when running, the tread comprising at least one hidden cavity configured to form a new groove opening onto the tread surface after a predetermined amount of partial wear, said hidden cavity comprising two opposite lateral walls connected together by a bottom radially towards the inside and by a crown part radially towards the outside, wherein the crown part of the hidden cavity has a plurality of fine ribs, the height of which extends radially towards the inside of the hidden cavity from the crown part delimiting the hidden cavity.

Dependencies are inferred from the claim text.

Tread Having Hidden Cavities

Life of this patent

Tread Having Hidden Cavities

Life of this patent

Abstract

Claims9