Modular Gel Cushion for Pressure Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current pressure-relief wheelchair cushions are expensive and often require manual adjustment or maintenance, failing to provide adequate pressure distribution for prolonged sitting, which increases the risk of pressure ulcers.
Innovation Solution
A customizable, modular cushion system using a foam substrate with uniformly sized voids and adjustable gel balls of varying viscosities, tailored to individual pressure maps to optimize pressure distribution and reduce the risk of pressure ulcers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If commercial pressure-relief cushions are used, then pressure distribution is improved, but cost increases significantly
Solution Approach 1:
The cushion is divided into multiple independently adjustable gel balls (e.g., 36 balls) that can be individually positioned and adjusted in the foam substrate. This segmentation allows customization of pressure distribution without requiring expensive commercial systems, as each ball can be optimized for specific pressure zones.
Solution Approach 2:
The invention changes the viscosity parameter of the gel balls to match individual pressure maps. By adjusting the viscosity of each gel ball based on the user's specific pressure distribution needs, the system achieves effective pressure relief at a lower cost than commercial options.
2Reliability
If commercial cushions with proprietary materials are used, then pressure relief performance is improved, but manufacturing cost and complexity increase
Solution Approach 1:
Instead of using expensive proprietary materials, the invention copies the functional characteristics of commercial cushions by using standard gel balls with adjustable viscosities. The gel balls replicate the pressure-relief function of proprietary gel chambers while being manufactured from inexpensive, readily available materials.
Solution Approach 2:
The invention achieves diverse performance characteristics by changing the viscosity parameter of the gel balls rather than using complex proprietary materials. This allows standard components to perform functions previously requiring expensive specialized materials.
3Stress or pressure
If customized gel balls with adjusted viscosity are used, then pressure distribution is optimized, but manufacturing precision requirements increase
Solution Approach 1:
The invention uses viscosity as a controllable parameter that can be adjusted within standard manufacturing tolerances. By selecting gel balls with appropriate viscosity ranges rather than requiring exact precision, the system achieves effective pressure distribution while maintaining manufacturing feasibility.
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 modular cushion design effectively reduces peak pressure points, decreases average pressure across the surface, and is more cost-effective than commercial options, with the ability to replace individual components rather than the entire cushion, thereby minimizing long-term costs.
Implementation Method 1
adjustable gel balls of varying viscosities, tailored to individual pressure maps to optimize pressure distribution
Data Source
AI summary
A high-performance, low-cost modular cushion using range of novel dynamically responsive materials has been designed and developed for use in seating pressure relief. The use of individual contained spheres creates a localized area of gel to minimize both flattening under pressure, and inflating in areas without contact while the elastic nature of the polymers creates a durable system that recovers rapidly from deformation. Gel balls of varying densities have been developed to optimize performance. Quantification of individual ball mechanical properties has been completed which provides load-deflection curves to inform optimal ball array layout based on user interface pressure distributions. A fitting algorithm is proposed which will employ the patient's seating interface pressure distribution to design a personalized modular cushion layout which will evenly distribute contact pressure across seating support interface and maximize contact pressure area.