Pneumatic Tire Tread with Segmented Lateral Grooves

The patent divides the lateral grooves into multiple segments with different depth characteristics. Specifically, the lateral grooves have a first depth in a circumferential direction and a second depth in a width direction, creating stepped or varied depth profiles. This segmentation allows different portions of the groove to serve different functions: deeper portions maintain traction by providing void space for debris and water evacuation, while shallower portions preserve block stiffness to prevent irregular wear.

The patent applies different groove depth characteristics to different locations and orientations. The lateral grooves have varying depths depending on their orientation (circumferential vs. width direction) and position within the tread pattern. This local differentiation enables specific zones to optimize for either wear resistance or traction based on their functional requirements, resolving the global contradiction between these two performance metrics.

The block-based tread pattern is segmented into multiple blocks separated by lateral grooves with specific depth characteristics. The segmentation creates a hierarchy where larger blocks provide overall flexibility and adaptability, while the groove structures within and between blocks provide localized stiffness support. This multi-level segmentation resolves the contradiction by allowing flexibility at the macro level while maintaining wear resistance at the micro level.

The tread pattern functions as a composite structure combining rigid blocks with flexible groove regions. The blocks provide structural integrity and wear resistance, while the grooves (with their varied depth profiles) provide flexibility and adaptability. This composite approach allows the tread to simultaneously exhibit both rigid and flexible characteristics in different regions, resolving the contradiction between these opposing properties.