Non-linear Filament Interface for Concussion Mitigation
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Solution Overview
Problem
Current helmet technology inadequately protects against concussions, as it primarily addresses superficial head injuries and linearly absorbs incident forces, failing to effectively mitigate direct or oblique forces that can cause concussions.
Innovation Solution
A protective helmet design featuring an inner layer, an outer layer separated by an interface layer with impact-absorbing materials that non-linearly deform in response to forces, comprising filaments configured to buckle or elastically deform, providing customized deformation properties through varying composition, number, and configuration of filaments and layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional helmets linearly absorb incident forces, then the helmet structure remains simple and predictable, but the bulk of the incident force is transmitted to the wearer's head, inadequately protecting against concussions
Solution Approach 1:
The patent changes the force-absorption parameter from linear to non-linear by using filaments with varying stiffness properties. The interface layer contains filaments with different bending stiffnesses that progressively engage during impact, creating a non-linear force-displacement relationship that reduces peak force transmission to the head while maintaining structural integrity.
Solution Approach 2:
The patent employs a composite structure consisting of an outer layer, inner layer, and interface layer with multiple filament types. This composite design combines materials with different mechanical properties - stiffer filaments for initial impact resistance and more compliant filaments for energy absorption - to achieve superior concussion protection without excessive force transmission.
2Object-affected harmful factors
If the helmet uses non-linearly deforming impact absorbing material, then concussion protection is improved by reducing peak acceleration, but the helmet structure becomes more complex with multiple filaments and layers
Solution Approach 1:
The patent segments the impact-absorbing function into multiple discrete filament elements within the interface layer. These filaments are arranged in patterns with varying orientations, lengths, and stiffnesses, allowing the complex non-linear absorption behavior to be achieved through simple, manufacturable individual elements rather than a monolithic complex structure.
Solution Approach 2:
The patent applies local quality by varying the filament properties (stiffness, length, orientation, density) at different locations within the interface layer. Regions with different impact expectations have differently configured filaments, optimizing protection where needed while maintaining overall structural efficiency and managing complexity through localized rather than universal design changes.
3Object-affected harmful factors
If conventional helmets protect from superficial head injury, then the outer shell provides simple structural protection, but they fail to protect from concussions caused by direct or oblique forces
Solution Approach 1:
The patent introduces an intermediary interface layer between the outer shell and inner lining that specifically addresses concussion protection. This intermediate layer of progressively engaging filaments acts as a mediator that dissipates oblique and direct impact forces before they reach the head, while the outer shell continues to provide superficial protection, thus resolving the gap in conventional helmet functionality.
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 helmet effectively reduces peak acceleration and distributes impact forces over a longer period, enhancing protection against both direct and oblique high-impact forces, thereby improving concussion prevention.
Implementation Method 1
An interface layer is positioned in the space between the inner layer and the outer layer and includes an impact absorbing material that non-linearly deforms in response to an incident force on the protective helmet
Implementation Method 2
the impact absorbing material allows the helmet to locally and elastically deform in response to an incident force
Implementation Method 3
the filaments configured to non-linearly deform in response to an incident force on the helmet
Implementation Method 4
the filaments configured to buckle or elastically deform, providing customized deformation properties
Data Source
AI summary
A protective helmet comprises an inner layer and an outer layer separated from the inner layer by a space. An interface layer is positioned in the space between the inner layer and the outer layer and includes an impact absorbing material that non-linearly deforms in response to an incident force on the protective helmet. For example, the impact absorbing material includes multiple filaments each having an end proximate to the inner layer and another end proximate to the outer layer interface, with the filaments configured to non-linearly deform in response to an incident force on the helmet.