Flexible Mask Coupling for CPAP Seal Stability
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Solution Overview
Problem
Traditional CPAP mask systems experience equipment-induced sleep interruptions due to external forces causing mask movement and seal displacement, leading to leaks and compromised therapy.
Innovation Solution
A patient interface with a decoupling mechanism between the mask seal and frame, allowing relative movement across a slip plane, spherical boundary, or cylindrical boundary, utilizing flexible couplings like ball and socket joints or bellows constructions to minimize the impact of external forces on the seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the mask frame is rigidly connected to the seal portion, then the structural stability of the mask system is improved, but the seal portion moves with the frame under external forces, causing seal displacement and leaks
Solution Approach 1:
The mask is divided into two functional segments: a rigid frame portion for structural support and stability, and a flexible seal portion for maintaining the seal. The coupling member connects these segments while allowing relative movement, enabling each segment to perform its primary function independently without compromising the other.
Solution Approach 2:
The coupling member is made of flexible material that can deform and accommodate relative movement between the frame portion and seal portion. This flexibility allows the seal to maintain its position and function even when the rigid frame moves under external forces, preventing seal displacement and leaks.
2Adaptability or versatility
If the mask frame allows movement to accommodate external forces, then the comfort and adaptability to patient movement is improved, but the seal portion moves relative to the frame, causing seal displacement and leaks
Solution Approach 1:
The coupling between the frame portion and seal portion is designed to be dynamic rather than static. The flexible coupling member allows the seal portion to move independently relative to the frame portion, accommodating patient movements and external forces while maintaining seal integrity. This dynamic coupling ensures the seal adapts to movement without displacing.
3Reliability
If a decoupling mechanism is introduced between the frame and seal, then the seal reliability is improved by preventing seal displacement, but the device complexity increases
Solution Approach 1:
The coupling member is constructed from flexible material that can deform to accommodate relative movement between the frame and seal portions. This flexible membrane or shell structure provides the necessary decoupling function while maintaining a relatively simple and compact design, avoiding the need for complex mechanical joints or multiple components.
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 decoupling mechanism reduces mask movement and seal displacement, maintaining a consistent seal and improving therapy delivery by allowing independent movement between the mask frame and seal, thereby reducing equipment-induced sleep interruptions.
Implementation Method 1
The coupling can be made of a flexible material. The coupling can have a bellows construction.
Data Source
AI summary
Mask interfaces having mask frames and mask seals are disclosed. Headgear and breathing conduits can be connected to the mask interfaces. The connection between the mask seals and the mask frames can enable movement of the mask seals relative to the mask frames. The relative movement may be at the mounting locations of the mask seals and mask frames.