Fluid-Filled Midsole Chamber with Stacked Tensile Member
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Solution Overview
Problem
Conventional midsoles in footwear lack advanced features to effectively attenuate ground reaction forces and provide dynamic stability, especially in athletic footwear, where traditional foamed polymer materials do not adequately address the need for enhanced comfort and performance.
Innovation Solution
Incorporation of a fluid-filled chamber within the midsole, featuring a polymer barrier and a stacked tensile member made of spacer textiles, which is pressurized to induce tension and maintain shape, enhancing the midsole's ability to absorb and distribute forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional foamed polymer material is used for midsole, then manufacturing is simple and cost-effective, but cushioning performance and dynamic stability are insufficient
Solution Approach 1:
The midsole is segmented into multiple functional layers: a fluid-filled chamber layer for dynamic cushioning and a foam polymer layer for structural support. This segmentation allows each layer to specialize in specific functions, improving overall cushioning performance while maintaining manufacturing simplicity through modular construction
Solution Approach 2:
The fluid-filled chamber is nested within the foam polymer material, creating a hierarchical structure where the chamber provides dynamic response to ground reaction forces while the surrounding foam provides structural integrity. This nesting approach combines the benefits of both materials without requiring completely separate components
2Adaptability or versatility
If fluid-filled chamber is added to enhance cushioning, then comfort and adaptability improve, but manufacturing complexity increases
Solution Approach 1:
The fluid pressure within the chamber can be adjusted to change the cushioning characteristics of the midsole. By modifying parameters such as fluid volume, pressure, or chamber geometry, the system adapts to different ground reaction forces and usage conditions without requiring fundamentally different manufacturing processes
Solution Approach 2:
The use of a fluid-filled chamber introduces pneumatic/hydraulic elements to the midsole, allowing dynamic response to compression forces. The fluid acts as a cushioning medium that can be pressurized or adjusted to provide tailored comfort and performance characteristics
3Stability of the object's composition
If stacked tensile member is incorporated to maintain chamber shape, then structural stability improves, but device complexity increases
Solution Approach 1:
The stacked tensile member is positioned within the fluid-filled chamber to provide structural support in the dimension perpendicular to the midsole's primary compression direction. This dimensional approach maintains chamber shape stability without adding complexity to the compression response mechanism
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 fluid-filled chamber provides improved cushioning, stability, and adaptability to ground reaction forces, enhancing the overall comfort and performance of athletic footwear by dynamically responding to foot movements.
Implementation Method 1
The fluid is located within the interior void and may be pressurized to place an outward force upon the barrier and induce tension in the stacked tensile member
Implementation Method 2
induce tension in the stacked tensile member
Implementation Method 3
Heat and pressure are applied to the first polymer layer, the second polymer layer, and the tensile member to bond (a) the first polymer layer to the surface of the first tensile element, (b) the second polymer layer to the surface of the second tensile element
Implementation Method 4
Heat and pressure are applied to the first polymer layer, the second polymer layer, and the tensile member to bond
Data Source
AI summary
A fluid-filled chamber may have a barrier, a stacked tensile member, and a fluid. The barrier may be formed from a polymer material that is sealed to define an interior void. The stacked tensile member may be located within the interior void and includes a first tensile element and a second tensile element that are joined to each other. Additionally, opposite sides of the stacked tensile member are joined to the barrier. The fluid is located within the interior void and may be pressurized to place an outward force upon the barrier and induce tension in the stacked tensile member. In some configurations, each of the tensile elements may be a spacer textile.