Compression-Modulated Cushion Valve for Automatic Pressure Control
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Solution Overview
Problem
Existing inflatable cushion technologies require manual adjustment of inflation and deflation, which can be impractical for mobility-impaired individuals or applications where interactive control is undesirable or impossible.
Innovation Solution
A self-regulating valve assembly comprising a collapsible, hollow elongate member and compression members that allows fluid exchange based on pressure differentials, enabling automatic modulation of fluid volume within the inflatable body without manual intervention, using a vent body and internal orifice system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual valve adjustment is used for inflatable cushion, then user can control inflation and deflation, but mobility-impaired individuals cannot operate it independently
Solution Approach 1:
The valve assembly enables the inflatable cushion to regulate its own fluid volume automatically based on user immersion depth, eliminating the need for manual operation. The system self-adjusts by allowing fluid ingress when the user is elevated and automatic egress when immersed, making it independently operable for mobility-impaired individuals.
Solution Approach 2:
The patent replaces manual mechanical valve operation with an automated mechanical system that uses pressure differentials and buoyancy forces to control fluid flow. The valve assembly responds automatically to changes in cushion immersion without requiring human intervention.
2Reliability
If preset valve assembly is used that automatically shuts off air flow, then optimal pressure distribution is achieved, but user must still manually open and close the valve
Solution Approach 1:
The valve assembly is designed to automatically open and close based on the cushion's immersion state. When the cushion is elevated out of water, positive pressure opens the valve for fluid ingress. When immersed, negative pressure closes the valve to maintain pressure distribution. This complete automation eliminates all manual valve control requirements.
3Strength
If fluid ingress is allowed when cushion is elevated, then cushion inflates to support user, but uncontrolled inflation may occur without regulation
Solution Approach 1:
The valve assembly incorporates a feedback mechanism where the cushion's immersion depth directly controls valve state. When elevated, the cushion's weight creates positive pressure that opens the valve for controlled inflation. When immersed, negative pressure automatically closes the valve, preventing overinflation and maintaining optimal support pressure.
Solution Approach 2:
The system uses pneumatic pressure differentials created by the cushion's immersion in water to control valve operation. The hydrostatic pressure from water immersion naturally closes the valve, while air pressure when elevated opens it, providing automatic regulated fluid exchange without mechanical controls.
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
Enables automatic control of fluid ingress and egress, maintaining constant fluid volume or pressure within the inflatable body, ensuring consistent support and usability for users with mobility impairments.
Implementation Method 1
closure of the elongate member results only from application of generally opposing mechanical forces across the lateral surface of the elongate member in contrast to pressure differentials
Implementation Method 2
at least one compression member disposed in the inflatable body and adapted to apply generally opposing mechanical forces to at least a portion of the hollow elongate member along the longitudinal axis and substantially across the lateral axis thereof
Data Source
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AI summary
Valve assemblies optionally with inflatable bodies for modulating fluid expulsion from an inflatable body, without active user participation. Valve assemblies include, in separate components or in integrated form, a vent body defining an external orifice, an internal orifice in fluid communication with the external orifice, and an inflatable body interface. Extending from the internal orifice is a collapsible, hollow elongate member defining longitudinal and lateral axes. Sealing closure of the elongate member, which is preferably constructed from a resilient material, results from application of generally opposing mechanical forces across a lateral surface of the elongate member. Compression localizing members may be used proximate to the elongate member to increase closure performance. In addition, performance parameters can be varied by modifying the physical characteristics of the compression members (height, upper surface area, lower surface area, composition, density, use of localizing ridges, etc.) as well as locations of the compression members (proximity to other compression members, distribution relative to the cushion geometry, etc.).