Deployable Bladder Marker for Personal Flotation Visibility
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Solution Overview
Problem
Current personal flotation devices (PFDs) face challenges in enhancing visibility and maintaining the user's head above water level, especially in wave conditions, making rescue difficult, especially when the user is unconscious or in adverse weather.
Innovation Solution
A deployable bladder system secured to the user, which inflates to form a handle portion, providing enhanced visibility and keeping the user's head above water, with tethers and links for easy recovery, and can be attached to various parts of the body or objects for increased usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a traditional PFD with high visibility material is used, then the user is visible in water, but the user's head can still become completely submerged in waves
Solution Approach 1:
The patent introduces a vertical dimension by deploying an inflatable bladder that extends upward from the user's back, creating a tall vertical structure that protrudes above wave levels. This transforms the problem from a two-dimensional surface visibility issue to a three-dimensional vertical positioning solution, where the bladder's height above water surface ensures the user's head remains visible and above waves even when submerged.
Solution Approach 2:
The inflatable bladder acts as an intermediary element between the user and the harsh wave environment. It provides a buffer that physically separates the user's head from direct wave impact while maintaining visibility. The bladder serves as a mediator that absorbs wave energy and prevents complete submersion without requiring direct intervention from the user.
2Illumination intensity
If a PFD with folded marker device is used, then visibility is enhanced, but the device becomes relatively bulky
Solution Approach 1:
The patent applies nesting by placing the inflatable bladder inside a compact containment pouch that attaches to the user's back. When not in use, the bladder is deflated and stored within the pouch, creating a compact, non-bulky configuration. When deployment is needed, the bladder is inflated outward from the pouch, transforming from a nested compact state to an extended visible state, thus eliminating bulkiness while maintaining visibility enhancement capability.
Solution Approach 2:
The device transitions from a static bulky folded marker to a dynamic inflatable structure. The bladder can be inflated or deflated as needed, allowing the device to adapt its volume and visibility characteristics dynamically. This dynamic capability enables the device to remain compact during normal activities and expand only when visibility or rescue assistance is required.
3Illumination intensity
If an elongate bar is attached to the PFD to enhance visibility, then visibility is improved, but the user's face is not raised further above the flat water level
Solution Approach 1:
The patent moves from a horizontal elongate bar configuration to a vertical inflatable bladder configuration. The bladder extends upward in the vertical dimension from the user's back, creating height above the water surface. This vertical dimension directly addresses face submersion by positioning the user's head and face higher above water level, while the bladder's visibility features provide the enhanced visibility function.
Solution Approach 2:
The patent uses pneumatic inflation to create a buoyant vertical structure that actively pushes the user's upper body and head above water level. The inflated bladder generates upward buoyant force that physically elevates the user's face above the flat water level, unlike a passive elongate bar that only provides visual marker without lifting capability.
4Reliability
If a PFD is used to support the user, then the user is kept afloat, but prompt recovery is delayed due to inability to attract attention
Solution Approach 1:
The patent incorporates high visibility visual markers on the inflatable bladder, such as fluorescent or reflective materials, that dramatically increase the user's visibility to rescuers. The bladder's bright colors and large surface area create a conspicuous target that can be spotted from aerial or distant perspectives, enabling rescuers to locate the user quickly and initiate recovery operations, thus reducing rescue time while maintaining reliable flotation support.
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 deployable bladder system significantly improves visibility and recoverability by keeping the user's head above water, facilitating easier rescue and reducing hypothermia risks, while allowing for easy lifting and attachment to rescue vessels without entering the water.
Implementation Method 1
The bladder is buoyant and is effective to maintain the user afloat and face-up in water
Implementation Method 2
Inflation may come from a small pressurized gas cylinder and/or a manual inflation valve
Data Source
AI summary
A marker and recovery device comprising: an enclosure adapted to be secured to a wearer; a bladder configured to fit within the enclosure in an uninflated state, the bladder comprising: an elongate tube; a first upper tube fluidly connected to the elongate tube at a first end of the elongate tube; and a second upper tube fluidly connected to the elongate tube at a second end of the elongate tube; and an inflation mechanism to inflate the bladder to extend the bladder from the uninflated state to a deployed state in which the first upper tube and second upper tube join to form a handle portion at the end of the elongate tube.