Patent ID: 9139048
Filing Date: 2015-09-22
Classification: B60C

Abstract:
1. A tire tread comprising a rib extending in the longitudinal direction of the tread, the rib delimited by axially spaced grooves of the tread and having axially spaced longitudinal edges at respective said grooves, the rib including a plurality of incisions each extending from one rib edge to the other, each incision formed by opposing faces of tread material; each incision comprising at least three parts, two of the parts constituting essentially transverse parts oriented at an angle of at least 60° to the tread's longitudinal direction and opening into respective said grooves; another of the parts constituting an essentially longitudinal part forming an average angle of no more than 10° with the tread's longitudinal direction; each essentially transverse part being bordered at one of its ends by an essentially longitudinal part and at another of its ends by one of a rib edge or an essentially longitudinal part; wherein: the essentially longitudinal part being devoid of means for blocking relative movement between the opposing faces thereof in the thickness direction of the tread and in a direction transverse to the thickness direction; each essentially transverse part including, on the respective opposing faces thereof, a blocking structure for limiting the amplitude of relative movement between such walls at least in the thickness direction of the tread, and comprising at least one undulation, zigzag, or relief elements engageable with one another, extending in the thickness direction of the tread; each essentially transverse part being entirely offset in the tread's longitudinal direction from any other essentially transverse part of the same incision; and a minimum distance between the essentially transverse parts of the same incision is between 15% and 35% of the average distance between successive incisions.