Dual-Shell Headgear With Responsive Fluids for C-C Impact Absorption
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Solution Overview
Problem
Current protective headgear does not adequately address the cumulative and repetitive brain injuries caused by coup-contrecoup (C-C) impacts, which contribute to Chronic Traumatic Encephalopathy (CTE), as they lack effective energy absorption mechanisms and diagnostic tools for early detection.
Innovation Solution
A dual shell structure with a functional gap containing dynamically responsive materials, such as thixotropic, rheopectic, and dilatant fluids, that absorb energy through phase changes and rotational mechanics, combined with a pressure-sensitive impact measurement system and signaling devices for early detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional protective headgear is used, then basic head protection is provided, but energy absorption from coup-contrecoup impacts is insufficient leading to cumulative brain injury
Solution Approach 1:
The patent employs materials that change their physical parameters dynamically - specifically, materials that transition between solid and liquid states or change viscosity in response to impact forces. This allows the protective system to adapt its energy absorption characteristics based on the magnitude and nature of the impact, effectively addressing coup-contrecoup injuries while maintaining comfort during normal activity.
Solution Approach 2:
The invention utilizes composite material structures combining multiple materials with different properties - such as rigid outer shells, intermediate energy-absorbing layers, and inner comfort layers. This multi-layer composite approach enables simultaneous protection against different types of impacts while managing the transmission of forces to the brain, directly addressing the insufficient energy absorption problem.
2Strength
If rigid protective structures are used, then impact resistance is improved, but rotational mechanics and energy dissipation are reduced
Solution Approach 1:
The patent incorporates dynamic elements that allow the protective system to move and deform in controlled ways during impact. This includes rotational mechanisms and viscoelastic materials that dissipate energy through deformation rather than rigid resistance, enabling the system to maintain strength while effectively dissipating impact energy through controlled motion and phase changes.
3Device complexity
If no diagnostic tools are integrated, then device complexity is reduced, but early detection of harmful impacts is not possible
Solution Approach 1:
The patent integrates sensor systems that detect impact forces and provide feedback about the magnitude and nature of impacts received. This feedback mechanism enables early detection of potentially harmful coup-contrecoup impacts, allowing users to take preventive action before cumulative injury occurs, while the system maintains reasonable complexity through selective sensor placement and processing.
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 design effectively reduces the transmission of energy to the brain by absorbing impact forces and provides early warning of potentially harmful impacts, potentially preventing CTE and acute concussions.
Implementation Method 1
Thixotropic materials demonstrate 'thixotropy' which is a time-dependent shear thinning property. These types of materials are very thick or viscous under static conditions; but they will flow, become thin or less viscous over time when shaken, agitated, sheared or otherwise stressed.
Implementation Method 2
The dynamically responsive materials disclosed and described herein include materials broadly classified as thixotropic, rheopectic, and dilatantic.
Implementation Method 3
The dynamically responsive materials disclosed and described herein include materials broadly classified as thixotropic, rheopectic, and dilatantic.
Implementation Method 4
A pressure-sensitive impact measurement system and signaling devices for early detection
Data Source
AI summary
An impact reducing headgear is disclosed which utilizes dynamically responsive materials which undergo physical changes during exposure to impact forces, such that physical changes or phase changes absorb energy. The helmet may be constructed with a dual shell structure and a bladder, where the dynamically responsive materials may be contained.