Pneumatic Tire Chamfered Sipe Design for Braking and Wear

The patent applies local quality by providing chamfered portions at specific locations on the sipe groove walls rather than uniformly across the entire sipe structure. The chamfered portions are strategically positioned to enhance water drainage at the sipe openings while leaving the deeper sipe structures intact to maintain wear resistance. This localized modification allows different regions of the sipe to serve different functions: the chamfered portions facilitate water ejection for wet braking performance, while the remaining sipe structure maintains integrity for wear resistance.

The patent applies partial action by providing chamfered portions that extend only partially along the sipe length rather than throughout the entire sipe structure. The chamfered portions are limited to 10-70% of the sipe length, which is sufficient to improve wear resistance at the vulnerable groove wall surfaces while leaving enough of the original sipe structure intact to maintain effective water drainage pathways. This partial modification achieves the desired wear protection without excessively compromising water ejection capability.