Tire Sidewall Ridge Layout for Unevenness Camouflage

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Pneumatic tires exhibit unevenness in the sidewall due to the joint and fold-back ends of the carcass ply, affecting appearance quality and requiring improved damage resistance and camouflage of these imperfections.

Innovation Solution

A pneumatic tire design featuring a non-decorative region with a smooth surface and decorative portions with recessed ridges, where the decorative portions are positioned with specific angles and distances to enhance damage resistance and conceal sidewall unevenness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If two band-shaped decorative portions are formed on the sidewall to camouflage unevenness, then the appearance quality is improved, but bareness (concave scratch due to rubber shortage) occurs at the intersecting portion

Engineering Contradiction:

Improveappearance qualityVSAvoidbareness occurrence

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

The patent extracts the problematic intersecting portion by making one decorative portion not extend to the ends in the tire circumferential direction, thereby removing the intersection point where bareness occurs while retaining the camouflaging function of the decorative portions

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent segments the decorative portions by creating a gap between them in the tire circumferential direction, dividing the continuous decorative pattern into separate sections to eliminate the intersection problem

Inventive Principle:

Principle #1Segmentation

2Shape

If two band-shaped decorative portions intersect on the sidewall, then unevenness camouflage is achieved, but damage resistance performance deteriorates due to cut scar extension

Engineering Contradiction:

Improveunevenness camouflageVSAvoiddamage resistance performance

Core Design Contradiction:

ShapeVSStrength

Solution Approach 1:

The patent segments the decorative portions by creating a gap between them, which acts as a barrier to prevent cut scars from extending across the entire sidewall, thereby improving damage resistance while maintaining the camouflaging effect

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gap between the decorative portions serves as an intermediary barrier that interrupts the path of potential cut scars, preventing them from extending continuously across the sidewall

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260061780A1Pneumatic tire

Publication Date: 2026.03.05 TOYO TIRE CORP

AI summary

A sidewall has a first decorative portion and a second decorative portion decorated with a plurality of ridges. The first decorative portion includes a first part extending along a first direction having a first angle with respect to the circumferential direction and a second part extending toward the second decorative portion along a second direction having a second angle with respect to the circumferential direction. The second angle is greater than the first angle. A shortest distance between the second part and the second decorative portion is a first distance. The first distance is greater than or equal to 0.5 mm and less than or equal to 3.0 mm. A shortest distance between the first part and the second decorative portion is larger than the first distance.