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1. (WO2018101933) IMPROVED TIRE TREADS HAVING POSITIVELY INCLINED SIPES

Pub. No.:    WO/2018/101933    International Application No.:    PCT/US2016/064240
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Thu Dec 01 00:59:59 CET 2016
IPC: B60C 11/12
B60C 11/03
Applicants: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
LIMROTH, John
COLLETT, Mark
Inventors: LIMROTH, John
COLLETT, Mark
Title: IMPROVED TIRE TREADS HAVING POSITIVELY INCLINED SIPES
Abstract:
In particular embodiments, a tire tread (20) includes one or more lateral sipes (26s) arranged within the tread. As each such lateral sipe (26s) extends outward from within the tread thickness (T20) and towards the outer, ground-engaging side (22) of the tread (20), the lateral sipe is inclined towards the intended direction of tire rotation (R). The lateral sipe also has a width (W26) (thickness) configured to, at an unworn stage, close along at least a portion of the sipe (26s) depth during operation of a loaded tire, and being configured to, at a worn stage, remain open during operation of the loaded tire. The lateral sipe has a width-to-height ratio associating the sipe width to the sipe height, the width-to-height ratio equaling 1:10 to 1:40. Providing a plurality of these lateral sipes may result in improved consistency of tread wear performance over the life of the tread.