Partially Foldable CBRN Hood for Helmet Compatibility
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Solution Overview
Problem
Existing CBRN protective garments with hoods cause discomfort and operational issues when worn with helmets, due to compression and poor adjustment, which can compromise protection and usability.
Innovation Solution
A CBRN protective garment with a hood that features a dual-layer design where the outer and inner layers are securely bonded only at the lower portion of their peripheral edges, allowing the outer layer to be partially detached and folded over independently, reducing thickness and improving comfort and helmet adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hood is made with multiple superposed layers to ensure protection against contaminating agents, then protection reliability is improved, but hood thickness increases causing discomfort and poor helmet adjustment
Solution Approach 1:
The hood is divided into two separate layers: an outer layer for liquid protection and an inner layer for vapor protection. These layers can be worn independently or combined, allowing the user to segment the protective function based on the specific threat level, thereby reducing overall thickness when full protection is not required.
Solution Approach 2:
The hood design allows dynamic adjustment of layer configuration. The outer and inner layers can be superposed when facing high-risk contamination, or separated when wearing a helmet to reduce compression. This dynamic reconfiguration enables the hood to adapt between maximum protection mode and comfortable wear mode.
2Reliability
If the hood layers are securely bonded throughout to maintain structural integrity, then protection effectiveness is improved, but flexibility and adaptability are reduced
Solution Approach 1:
The bonding between outer and inner layers is segmented rather than continuous. The layers are securely bonded at the periphery to maintain sealing integrity, but remain separable at the front opening area. This allows the hood to maintain structural integrity for protection while enabling flexibility for different wear configurations including helmet compatibility.
3Ease of operation
If the hood thickness is reduced to improve comfort and helmet adjustment, then ease of operation is improved, but protection capability may be compromised
Solution Approach 1:
The hood provides dynamic thickness adjustment through the optional superposition of outer and inner layers. When helmet wear is required, only the necessary layer is worn to reduce thickness and improve comfort. When facing contaminating agents, both layers are superposed to ensure complete protection capability without permanent increase in baseline thickness.
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 solution enhances user comfort and operational effectiveness by reducing hood thickness, allowing better helmet adjustment, and maintaining protection against CBRN agents in all forms.
Implementation Method 1
a layer of material, for example a textile layer, so-called the outer layer, configured to stop the contaminating agent in the liquid form, having a hydrophobic and oleophobic dual characteristic
Implementation Method 2
a layer of material, for example a textile layer, so-called the outer layer, configured to stop the contaminating agent in the liquid form, having a hydrophobic and oleophobic dual characteristic
Implementation Method 3
a layer of material, so-called the inner layer, configured to absorb and/or adsorb the vapours originating from the contaminating agent
Implementation Method 4
a layer of material, so-called the inner layer, configured to absorb and/or adsorb the vapours originating from the contaminating agent
Data Source
AI summary
A protective garment to protect at least an upper portion of the user's body against effects of a contaminating agent. The garment includes a hood to cover the user's head. The hood's peripheral edge delimits an opening for the user's face. In a thickness of the hood, from an external environment towards the user's body: an outer layer configured to stop the contaminating agent, in a liquid form, having a hydrophobic and oleophobic dual characteristic, and an inner layer configured to at least one of absorb and adsorb vapours originating from the contaminating agent. Each of the outer layer and the inner layer of the hood has a peripheral edge, which are assembled so as to form the peripheral edge of the hood. The peripheral edge of the outer layer is securely assembled to the peripheral edge of the inner layer only at a lower portion.