Importance

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Abstract

Tire tread, comprising at least one groove of width W and depth P which is delimited by two walls facing one another, these walls being joined together by a groove bottom, at least one groove comprising at least one flexible device for at least partially closing this groove as it enters the contact patch in which the tire is in contact with a roadway, each flexible device comprising at least one blade of a thickness suited to allowing it to flex under the effect of a circulation of liquid, this at least one blade being borne by a wall delimiting the groove, each blade of thickness E being bounded by a bottom wall facing the bottom of the groove, an end wall facing the other wall of the groove and a contact wall intended to come into contact with the roadway and lateral walls spaced apart from one another by a distance equal to the thickness E of the blade, this tread being such that the bottom wall of the blade comprises a first part extending between the points of connection with the wall bearing the blade, a second part extending the first part, this second part being extended by a third part as far as the end part of the blade, the first part and the second part being offset towards the outside with respect to a plane connecting the points of connection with the wall bearing the blade and the points of connection of the second part to the third part in order to form a notch of maximum height H in the bottom wall of the blade, this tread being characterized in that the angle between the second part and the third part is greater than 110 degrees and less than 180 degrees.

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First Claim