Footwear Midsole with Segmented Foam and Protective Cage
Solution Overview
Problem
Conventional athletic footwear midsoles lack optimal balance between cushioning, support, and durability, particularly in areas that require varying levels of ground reaction force attenuation and traction, leading to inadequate performance in different athletic activities.
Innovation Solution
The design incorporates a lightweight, low-density polymeric foam midsole component partially covered by a more rigid and dense protective component, featuring billows structures and outsole components for enhanced support and traction, allowing for customizable flexibility and wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional polymer foam midsole is used throughout the entire length of the footwear, then the midsole provides consistent cushioning and support, but the weight and density cannot be optimized for different activity demands
Solution Approach 1:
The midsole is divided into multiple segments: a lightweight low-density polymer foam material positioned at the forefoot and a more dense polymer foam material positioned at the heel. This segmentation allows each portion to be optimized for its specific functional requirements - the forefoot benefits from lightweight cushioning while the heel receives enhanced impact attenuation.
Solution Approach 2:
Different regions of the midsole are assigned different material densities and properties. The forefoot area uses low-density foam for lightweight responsiveness, while the heel area uses high-density foam for superior shock absorption. This local differentiation of material quality enables the midsole to meet varying performance demands across different foot zones.
2Strength
If a dense and durable material is used for the midsole, then the midsole provides enhanced support and durability, but the cushioning comfort and energy absorption are reduced
Solution Approach 1:
The heel portion of the midsole utilizes dense polymer foam material that provides enhanced structural support, durability, and ground reaction force attenuation. This localized application of high-density material ensures strength where impact forces are greatest while maintaining overall energy absorption capabilities of the footwear.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration provides improved cushioning, support, and traction, adapting to the demands of various athletic activities while maintaining lightweight and comfortable footwear characteristics.
Implementation Method 1
The midsole, which is traditionally attached to the upper along the entire length of the upper, forms the middle layer of the sole structure and serves a variety of purposes that include controlling foot motions and attenuating impact forces
Implementation Method 2
a protective component that covers at least a portion of a bottom surface of the polymeric foam member
Implementation Method 3
An exposed outer edge of the polymeric foam member may include: (a) a first billows structure that includes: a first outer billow ridge, a second outer billow ridge, a third outer billow ridge
Data Source
AI summary
Sole structures for articles of footwear, including athletic footwear, include a relatively soft and lightweight foam midsole component partially covered by at least one more rigid and/or dense cage (protective) component(s) and/or other protective component(s).