Multi layer cushions and positioners
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Solution Overview
Problem
Existing cushions and positioners lack effective multi-layer designs that can conform to surfaces and objects while providing adequate support and cushioning, often failing to isolate pressure and distribute forces uniformly.
Innovation Solution
A multi-layered cushion or positioner design featuring a stabilizing layer, an intermediate element, and an upper element, where each layer can be partially superimposed, with breathable chambers and compressible media that transition between flowable and semi-rigid states to conform to surfaces and objects, and include ventilation ports or fluidized mediums for pressure distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer cushion design is used, then the structure is simple, but it cannot effectively isolate pressure and distribute forces uniformly
Solution Approach 1:
The cushion is divided into multiple functional layers: a stabilizing layer for pressure distribution, an intermediate layer for isolation, and an upper layer for conforming to the object. Each layer performs a specific function, collectively achieving uniform pressure distribution and force isolation that a single-layer design cannot accomplish.
Solution Approach 2:
An intermediate layer is introduced between the stabilizing layer and the upper conforming layer. This intermediate layer acts as a mediator that isolates the pressure from the surface against which the cushion rests, preventing direct transmission of pressure to the supported object while still allowing the upper layer to conform to the object's shape.
2Stability of the object's composition
If the cushion material is made rigid for stability, then it provides structural support, but it cannot conform to the shape of objects
Solution Approach 1:
Different layers of the cushion have different mechanical properties tailored to their specific functions. The stabilizing layer has higher rigidity for structural support and stability, while the upper layer has lower rigidity to conform to the shape of the supported object. This local differentiation of material properties allows the cushion to simultaneously achieve stability and conformability.
Solution Approach 2:
The cushion employs a composite structure with multiple layers of different materials or material densities. The stabilizing layer uses a more rigid material for structural integrity, while the upper layer uses a softer, more compliant material for conforming to objects. This composite approach allows each layer to optimize its performance for its specific function.
3Shape
If the cushion is made fully conformable to objects, then it provides comfort, but it cannot maintain structural stability
Solution Approach 1:
The cushion is segmented into layers with distinct functions: the lower stabilizing layer maintains structural integrity and prevents collapse, while the upper conforming layer provides comfort by adapting to the object's shape. This segmentation allows the cushion to be both stable and conformable without compromising either property.
Solution Approach 2:
The intermediate layer serves as a buffer that transmits the conforming action from the upper layer without compromising the structural stability of the lower layer. It allows the upper layer to be soft and adaptable while the lower layer remains rigid and stable, mediating between these conflicting requirements.
4Device complexity
If pressure from the surface is directly transmitted to the object, then the structure is simple, but it causes discomfort and potential damage
Solution Approach 1:
The intermediate layer acts as a pressure-isolating intermediary that prevents direct transmission of surface pressure to the supported object. It absorbs and redistributes pressure forces, converting concentrated surface pressure into distributed forces that do not harm the supported object, thereby eliminating the harmful effect of direct pressure transmission.
Solution Approach 2:
The cushion layers transform the pressure parameters through their compression and deformation characteristics. The stabilizing layer distributes pressure over a larger area, the intermediate layer isolates and attenuates pressure peaks, and the upper layer conforms to the object while maintaining reduced pressure levels, effectively changing the pressure parameters from harmful concentrated forces to benign distributed forces.
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 design ensures the cushion or positioner maintains conformation to surfaces and objects, provides effective support and cushioning, and distributes pressure uniformly, enhancing stability and comfort by isolating surface pressure from the object and allowing for micro-adjustment and breathability.
Implementation Method 1
compressible media that transition between flowable and semi-rigid states
Implementation Method 2
breathable chamber that carries and contains a compressible medium... air may readily pass through the breathable chamber
Implementation Method 3
The coefficient of friction of the surfaces of particles of the compressed compressible medium may prevent them from flowing relative to one another
Data Source
AI summary
Multilayered cushions and positioners include a plurality of compressible layers, at least of which may include a breathable chamber that holds compressible beads. The compressible beads may flow until an object is placed thereon or until the compressible layer is placed against a surface. A compressive force exerted by the object or the surface on the beads may compress them, causing the beads to conform to a shape of the object or surface and increasing a coefficient of friction of the beads, which may hold the beads in position and increase a rigidity of the cushion or positioner at the location thereof that receives the object or surface. An intermediate element, such as a pressurizable element, may be positioned between compressible layers to prevent forces exerted one of the compressible layers from being communicated directly to the other compressible layer.