Outsole Traction Inserts With Anchored Flanges for Stable Grip

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Solution Overview

Problem

Existing footwear soles lack effective traction mechanisms that enhance performance and comfort by providing stable contact with various surfaces, particularly during athletic activities.

Innovation Solution

Incorporation of traction elements with protrusions and flanges into the outsole, where the flanges are secured within recesses in the outsole and protrude through holes, enhancing grip and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traction elements are added to the outsole, then traction and stability are improved, but device complexity increases

Engineering Contradiction:

ImprovetractionVSAvoidoutsole structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The outsole is segmented into multiple functional zones with different traction elements (lugs, claws, ribs) positioned at specific locations to address different traction needs. Each element type serves a specific function, allowing the complex traction requirement to be divided into manageable components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the outsole are given different local qualities - some areas have aggressive lugs for mud traction, others have smoother surfaces for hard surfaces, and specific zones have claw elements for lateral stability. This localized differentiation optimizes traction without uniformly complicating the entire outsole structure.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If multiple traction element types are used, then adaptability to different surfaces is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvesurface adaptabilityVSAvoidmanufacturing process

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Multiple traction element types (lugs, claws, ribs, and varied tread patterns) are merged into a single outsole component that can be manufactured as one integrated piece. This combining approach maintains surface adaptability while simplifying manufacturing compared to assembling separate traction elements.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The outsole utilizes composite material construction with different rubber compounds or materials for different traction elements and zones. This allows each element to have optimized properties for its specific function while being manufactured as an integrated composite structure, balancing versatility with manufacturing feasibility.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20250288057A1Outsoles having traction inserts

Publication Date: 2025.09.18 LULULEMON ATHLETICA CANADA INC

AI summary

An article of footwear may include an outsole having an opening extending from a top face of the outsole to a ground-contacting face of the outsole, and a traction member disposed within the opening in the outsole. The traction member has a protruding portion and flange portion extending from an upper end of the protruding portion. The flange portion is secured to the top face of the outsole.