Fluid-Filled Support Cushion for Pressure Relief Reliability
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Solution Overview
Problem
Current methods for preventing pressure sores, such as manual repositioning and traditional seat cushions, are either invasive, disruptive, or inadequate for individuals with limited mobility, and existing active cushions often rely on bulky pneumatic systems with interconnected bladders that can fail if one bladder is compromised, leading to inadequate support.
Innovation Solution
A dynamic support apparatus featuring a cushion with strategically placed actuators that can be filled with fluid, incorporating a stratified foam support and a sensor assembly to monitor pressure and adjust fluid distribution dynamically, ensuring continuous support and pressure relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If traditional seat cushions are used to distribute pressure, then pressure distribution is improved, but the device becomes bulky and requires frequent manual adjustments
Solution Approach 1:
The cushion is divided into multiple independent air chambers that can be individually adjusted. Each chamber can be inflated or deflated separately to customize pressure distribution across different body areas, eliminating the need for bulky traditional cushions while maintaining effective pressure relief.
Solution Approach 2:
The cushion incorporates adjustable air chambers that can dynamically change their inflation state to adapt to different seating positions and pressure requirements. This dynamic adjustment capability replaces static traditional cushions, providing effective pressure distribution without excessive bulk.
2Stress or pressure
If pneumatic systems are used for pressure relief, then pressure distribution is improved, but the system becomes costly and requires maintenance
Solution Approach 1:
The cushion incorporates one-way valves that automatically maintain air pressure without requiring active pumping or electronic control systems. The system uses passive mechanical mechanisms for pressure regulation, eliminating the need for expensive motors, sensors, and complex control electronics while maintaining effective pressure relief.
Solution Approach 2:
The invention uses simple pneumatic principles with manually inflatable chambers and one-way pressure retention valves. This approach provides effective pressure relief through fluid mechanics without requiring complex automated pneumatic systems, reducing manufacturing costs and maintenance requirements.
3Stress or pressure
If interconnected bladders are used in pneumatic cushions, then pressure distribution is improved, but the system becomes unreliable as one failure compromises all bladders
Solution Approach 1:
The cushion is divided into multiple independent air chambers separated by impermeable partitions. Each chamber operates independently with its own pressure retention mechanism, so that if one chamber fails, the others remain functional and continue to provide pressure relief. This segmentation eliminates the single-point-failure vulnerability of interconnected systems.
4Stress or pressure
If manual repositioning is used to prevent pressure sores, then pressure relief is achieved, but the method is disruptive and requires frequent intervention
Solution Approach 1:
The cushion automatically maintains pressure relief through its passive one-way valve system that retains air pressure without requiring active control or user intervention. The system provides continuous pressure distribution adjustment without needing frequent manual repositioning, making it suitable for users with limited mobility.
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 dynamic support apparatus provides effective and continuous pressure distribution, reducing the risk of pressure sores by dynamically adjusting to the user's needs, maintaining support even if one actuator fails, and minimizing discomfort through strategic fluid management.
Implementation Method 1
an actuator having an interior volume that may be configured to be at least partially filled with a fluid
Implementation Method 2
a support disposed in the interior volume wherein the support configured to support an occupant when the interior volume is not filled with fluid sufficient to support the occupant
Data Source
AI summary
A dynamic support apparatus. The dynamic support apparatus includes a cushion, at least one actuator wherein the at least one actuator defines an interior volume and wherein the interior volume may be configured to be at least partially filled with a fluid, and a support disposed in the interior volume wherein the support configured to support an occupant when the interior volume is not filled with the fluid such that the support is sufficient to support the occupant.