Tire tread including sipes and sipes

Abstract

The invention relates to a tread (1) comprising at least two longitudinally oriented grooves (31, 41, 42), wherein at least one wave-shaped groove (31) is in the tread of the tread The surface (10) is open, at least one rib (21) oriented in the longitudinal direction of the tread is bounded by at least one of said corrugated grooves, each corrugated groove (31) comprising an external void open on the tread surface Cavities (311) and inner cavities (312) hidden in the tread thickness, the outer cavity (311) of each undulating groove (31) opening on the tread surface (10) in its as-new condition has A profile (310) with a distance Lm from the farthest endpoints A and B and a rib (21) with a width Ln comprising a plurality of transverse sipes (5) positioned at an average pitch Pi, the The tread satisfies: - a length Lm of the contour (310) of the outer cavity (311) equal to or greater than an integer N times the pitch Pi up to a number equal to at most 25% of the integer N times the pitch Pi, - in a new state , N+1 transverse sipes (5) of the same rib (21) lead to each open cavity (311) bordering said rib, one of these transverse sipes (51) being close to the contour The end point A of (310) is open at a distance D1 from the point A, the other transverse sipe (52) is open at a distance D2 from the point B close to the other end point B of the contour (310), these two The difference between the distances D1 and D2 is at most 5 mm.

Description

technical field [0001] The present invention relates to tire treads, and more particularly to tread patterns of these treads, which are more durable in terms of drainage in the rain, and which also have improved wear properties; Tread of the tire. Background technique [0002] In a known manner, the conditions in which heavy duty vehicles are driven in the rain require rapid removal of water that may be present in the area where the tire (more specifically the tire tread) comes into contact with the road surface, in order to ensure that the material from which the tread is made is indeed compatible with the contact with the road surface. Water that is not pushed away in the front and sides of the tire flows into or partially collects in cuts or voids formed in the tire tread. [0003] The flow network formed by these cuts or voids needs to be durable, that is to remain effective, over the life of the tire, between its new condition and its removal due to wear reaching the ...

AI Technical Summary

Problems solved by technology

This uneven wear can lead to premature removal of the tire from the vehicle in order to replace it with a brand new tire, which significantly increases the cost of driving per unit of distance traveled

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