Inflatable Adapter for Respiratory Mask Seal and Comfort
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Solution Overview
Problem
Respiratory protective facial devices, such as negative-pressure masks, face challenges in achieving a secure seal due to the variability in facial shapes and sizes, leading to discomfort and reduced filtering efficiency, as the elastic oronasal cup struggles to adapt to individual features and the tight head strap set causes pressure issues.
Innovation Solution
An adapter system with an inflatable body along the perimetral edge of the oronasal cup, manually inflatable to adapt to the user's face shape, improving sealing and comfort by distributing pressure evenly and allowing for personalized fit adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the head strap set is tightened to maximize sealing action, then the sealing fit is improved, but user comfort deteriorates due to excessive pressure on the face
Solution Approach 1:
An inflatable adapter body is introduced as an intermediary element between the oronasal cup and the user's face. This adapter can be inflated to create a custom-fitting barrier that conforms to facial irregularities, maintaining sealing effectiveness while distributing pressure more evenly to improve comfort. The adapter acts as a mediator that decouples the direct pressure transmission from the sealing function.
Solution Approach 2:
The adapter body's volume and pressure characteristics are changed through manual inflation. By adjusting the amount of air introduced into the adapter, the system can adapt to different face shapes and sizes, optimizing both sealing fit and comfort. The inflatable nature allows dynamic adjustment of the adapter's physical parameters to match individual user requirements.
2Reliability
If the oronasal cup is made tight to follow facial irregularities, then sealing action is improved, but discomfort increases due to pressure concentration
Solution Approach 1:
The inflatable adapter serves as a pressure-distributing intermediary between the rigid oronasal cup and the face. It conforms to facial irregularities through inflation, creating a compliant interface that maintains sealing action while preventing pressure concentration at specific points. The adapter's elasticity and inflatable nature allow it to absorb and distribute mechanical stresses.
Solution Approach 2:
The adapter body is constructed as a flexible inflatable structure that can deform to match the contours of the user's face. This flexible shell approach allows the system to adapt to individual facial geometries while maintaining a comfortable pressure distribution profile, preventing localized stress points that would cause discomfort.
3Ease of manufacture
If a universal oronasal cup design is used, then manufacturing simplicity is improved, but adaptability to different face shapes deteriorates
Solution Approach 1:
The system is segmented into two independent components: a universal oronasal cup and a separate inflatable adapter. The oronasal cup maintains its simple, standardized design for ease of manufacture, while the adapter provides the customization capability. This segmentation allows the complex adaptability function to be separated from the manufacturing-simple base component.
Solution Approach 2:
The adapter introduces dynamic adaptability to an otherwise static universal mask design. Through manual inflation, the adapter can change its volume and shape to accommodate different face geometries. This dynamic element allows a single universal mask model to adapt to various users without requiring multiple customized masks.
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
Enhances the sealing action and filtering efficiency while increasing user comfort by accommodating facial irregularities and reducing the need for excessive head strap tension, allowing for a universal fit across different face shapes and sizes.
Implementation Method 1
an inflatable body configured to be applied substantially along the entire perimetral edge of the oronasal cup... suitable, when operated, for introducing air into the inflatable body
Data Source
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AI summary
It is disclosed an adapter system for a respiratory protective facial device comprising an oronasal cup with a perimetral edge, such as a negative-pressure mask with oronasal cup made of non-breathable elastic material. The adapter system comprises an inflatable body configured to be applied substantially along the entire perimetral edge of the oronasal cup of the respiratory protective facial device so as to be interposed between the perimetral edge of the oronasal cup and the user's face when the device is worn. The adapter system also comprises an inflating unit which is manually operable and is suitable, when operated, for introducing air into the inflatable body.