Fluid-Filled Sole Structure for Lateral Stability and Traction
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Solution Overview
Problem
Conventional fluid-filled chambers in footwear midsoles fail to provide adequate support and traction during athletic movements, leading to foot instability due to inadequate handling of directional shifts in ground-reaction forces.
Innovation Solution
A sole structure with a plurality of fluid-filled segments, each segment having specific geometric configurations and orientations, combined with an outsole design featuring grooves and ridges, to enhance stability and traction by adapting to different directions of ground-reaction forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional fluid-filled chamber is used in the midsole, then cushioning is provided by compressing under ground-reaction forces, but support and traction are inadequate during directional shifts in athletic movements
Solution Approach 1:
The fluid-filled chamber is divided into multiple fluid-filled segments (first, second, third segments) with different geometric configurations and orientations. Each segment is positioned to handle ground-reaction forces from specific directions, providing adaptable support during directional shifts in athletic movements while maintaining cushioning functionality.
2Strength
If a conventional fluid-filled chamber is used in the midsole, then cushioning is provided by compressing under ground-reaction forces, but traction between the outsole and ground surface is inadequate
Solution Approach 1:
The outsole is designed with localized features including grooves and ridges positioned at specific locations to enhance traction in different directions. The grooves extend in multiple directions to channel fluids and prevent slippage, while ridges provide additional grip points, ensuring reliable traction during athletic movements without compromising the cushioning function of the fluid-filled segments.
3Stability of the object's composition
If a conventional fluid-filled chamber is used in the midsole, then the chamber compresses resiliently under applied loads, but the foot becomes unstable during directional shifts
Solution Approach 1:
The fluid-filled segments are designed with asymmetric geometric configurations and orientations. The first segment has a different shape and orientation than the second and third segments, allowing each to optimally respond to ground-reaction forces from specific directions. This asymmetric arrangement provides stable foot support while adapting to directional shifts in athletic movements.
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 sole structure provides enhanced cushioning, stability, and traction by allowing fluid-filled segments to compress and retain shape differently based on load direction, maintaining foot position and improving engagement with the ground surface.
Implementation Method 1
compresses resiliently under an applied load to cushion the foot by attenuating ground-reaction forces
Implementation Method 2
fluid-filled chamber to increase durability of the sole structure, as well as to provide cushioning to the foot by compressing resiliently under an applied load
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A sole structure for an article of footwear, the sole structure comprising: a heel region, a forefoot region, and a midfoot region disposed between the heel region and the forefoot region; a first fluid-filled segment including a first portion extending from a medial side of the sole structure to a lateral side of the sole structure and including a first end and a second end opposite of the first end; and a second fluid-filled segment including a first portion extending from the lateral side of the sole structure to the medial side of the sole structure, including a first end and a second end opposite of the first end, and being convergent with the first portion of the first fluid-filled segment; wherein the first end of the first portion of the first fluid-filled segment is spaced apart from the first end of first portion of the second fluid-filled segment, the first portion of the first fluid-filled segment and the first portion of the second fluid-filled segment extending away from each other to define a substantially V-shape that opens in a direction toward the lateral side of the sole structure.