Fluid-Filled Footwear Chamber Combining Foam and Tensile Coupling
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Solution Overview
Problem
Conventional footwear sole structures often have separate and independent cushioning systems for responsiveness and impact absorption, failing to effectively integrate these properties in a unified manner.
Innovation Solution
A fluid-filled chamber within the midsole, comprising a first and second barrier layer defining an interior void with a foam structure and tensile member, which integrates fluid-filled cushioning and foam cushioning to provide both responsiveness and impact absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate and independent cushioning systems are used for responsiveness and impact absorption, then each system can be optimized independently, but the overall integration and cooperation between systems is poor
Solution Approach 1:
The patent merges the responsive cushioning system (fluid-filled chamber with tensile member) and the impact absorption system (foam structure) into a single integrated midsole assembly. The tensile member connects the fluid-filled chamber to the foam structure, enabling mechanical coupling and coordinated operation of both cushioning functions within one unified component rather than separate independent systems
Solution Approach 2:
The midsole assembly is designed as a multi-functional unit that simultaneously provides both responsive cushioning (through the fluid-filled chamber) and impact absorption (through the foam structure). The tensile member enables the system to perform multiple functions - maintaining fluid chamber integrity while transmitting forces to the foam structure for impact dissipation
2Speed
If stiffer foam materials are used, then responsiveness is improved, but impact absorption capability deteriorates
Solution Approach 1:
The patent employs a composite cushioning system combining a fluid-filled chamber (providing responsive, spring-like behavior) with a foam structure (providing progressive collapse and energy absorption). The tensile member couples these two different material systems, allowing the stiffer fluid chamber to provide responsiveness while the softer foam structure handles impact absorption, resolving the trade-off between these two properties
3Force
If softer foam materials are used, then impact absorption is improved, but responsiveness deteriorates
Solution Approach 1:
The composite midsole assembly pairs a soft foam structure (optimized for impact absorption) with a fluid-filled chamber (optimized for responsiveness). The tensile member mechanically links these two components, allowing the foam to deform and absorb impacts while the fluid chamber maintains its shape and provides responsive rebound, thereby achieving both soft cushioning and responsive feel simultaneously
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
The integrated fluid-filled chamber enhances cushioning by absorbing impact forces while maintaining responsiveness, offering improved comfort and performance by combining fluid and foam cushioning mechanisms.
Implementation Method 1
a fluid-filled chamber and disposed within the fluid-filled chamber a foam structure and a tensile member
Implementation Method 2
disposed within the fluid-filled chamber a foam structure and a tensile member
Data Source
AI summary
A fluid-filled chamber is provided and includes a first barrier layer, a second barrier layer, a foam structure, and a tensile member. The second barrier layer is secured to the first barrier layer to define an interior void between the first barrier layer and the second barrier layer. The interior void contains a predetermined volume of fluid. The foam structure and the tensile member are disposed within the interior void, whereby the tensile member includes a plurality of fibers extending in a first direction between the first barrier layer and the second barrier layer.