IMPROVED NOISE-REDUCING DEVICE FOR TIRE

摘要

Disclosed herein is a tread for a tire, in which the tread provides an improvement to the resonance noise-reducing devices and seeks at the same time to obtain easy molding and demolding of the flexible blades that form the groove closure device and complete closure of the cross section of each groove in which these flexible blades are formed.

主权项

1. A tread for a tire, comprising:
a tread surface which comes into contact with a roadway, comprising at least one groove of width W and of depth P delimited by two lateral walls facing one another, the two lateral walls being joined together by a groove bottom, with at least one groove comprising:
a plurality of closure devices, each of the plurality of closure device being made up of a flexible blade to close the at least one groove in a rest position to a degree of closure of at least 90%,
the flexible, blade having a thickness suited to allowing it to deform under the effect of a circulation of liquid in the at least one groove, wherein the flexible blade is secured to the two lateral walls delimiting the groove and is secured to the bottom of the at least one groove, and the flexible blade, under the action of a flow of liquid, deforms in the groove in order to reduce a degree of closure of the cross section of this groove to at most 40%, the degree of closure being defined as a proportion of the cross section of the groove that is closed to the circulation of liquid.