Tire for heavy load

The heavy-duty tire design with circumferential grooves and crown sipes addresses the challenge of maintaining wet performance and reducing rolling resistance by enhancing wear resistance and groove volume, achieving consistent performance over its lifespan.

JP2025160979APending Publication Date: 2025-10-24SUMITOMO RUBBER INDUSTRIES LTD
1 Cites 0 Cited by

Patent Information

Application Number
JP2024063765
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-11
Publication Date
2025-10-24

AI Technical Summary

Technical Problem

Heavy-duty tires face a challenge in maintaining wet performance while reducing rolling resistance, as tread patterns that enhance driving performance on wet roads tend to increase energy loss and rolling resistance, and patterns that reduce rolling resistance may compromise wet performance due to wear.

Method used

A heavy-duty tire design featuring a tread with circumferential main grooves, crown narrow grooves with alternating inner and outer narrow grooves and connecting grooves, and crown sipes that maintain rigidity and groove volume, allowing for reduced rolling resistance and suppressed wear-related deterioration of wet performance.

Benefits of technology

The tire maintains low rolling resistance and prevents deterioration of wet performance throughout its lifespan by enhancing wear resistance and maintaining groove volume through the interaction of narrow grooves and sipes, ensuring consistent performance until replacement.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

To provide a tire 2 for heavy load which can restrain wet performance from being decreased due to abrasion wear while trying to reduce rolling resistance.SOLUTION: The tread 4 comprises a crown land part 20. The crown land part 20 comprises a crown striation 32. The crown striation 32 comprises a plurality of inside striations 34, a plurality of outside striations 36, and a plurality of connection striations 38. The crown striation 32 comprises a trunk 40 and a widening part 42. The widening part 42 includes a wider groove width than groove width of the trunk 40. As the tread 4 comes into contact with the road surface and then deforms, a pair of wall surfaces 32W of the crown striation 32 come into contact with each other at the trunk 40. The crown striation 32 forms two crown narrow land parts 44 on the crown land part 20. The two crown narrow land parts 44 are provided with a plurality of crown sipes 50, respectively.SELECTED DRAWING: Figure 3
Need to check novelty before this filing date? Find Prior Art