Outsole Traction Inserts with Flanged Recess Mounting for Stable Grip

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Solution Overview

Problem

Existing footwear soles lack effective traction mechanisms that enhance performance and comfort by providing consistent grip on various surfaces.

Innovation Solution

Incorporation of traction members with protruding portions and flanges into the outsole, where the flanges are secured to the outsole's top face and conform to the shape of recesses, enhancing stability and grip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traction members are added to the outsole, then traction performance is improved, but device complexity increases

Engineering Contradiction:

Improvetraction performanceVSAvoidoutsole structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The outsole is segmented into multiple functional zones with dedicated traction members positioned at specific locations (heel, midfoot, forefoot) to provide targeted traction where needed, rather than uniformly distributing traction elements throughout the entire outsole

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The traction members are nested within recesses in the outsole structure, with the flange portion of each traction member fitting into a corresponding recess in the outsole top face, creating an integrated assembly where the traction member is housed within the outsole body

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If multiple traction members are incorporated into the outsole, then grip on various surfaces is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvegrip on various surfacesVSAvoidoutsole manufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The recesses for the traction members are pre-formed in the outsole during the outsole manufacturing process, and the traction members are pre-formed with their flange and protruding portion structures before being inserted into the outsole, allowing for streamlined assembly

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The flange portion of each traction member is designed to conform to the shape of its corresponding recess, creating a universal fitting mechanism that allows the same basic traction member design to be used in multiple positions throughout the outsole with different orientations and configurations

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12376645B2Outsoles having traction inserts

Publication Date: 2025.08.05 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.