Inflatable Bladder PFD for Land Mobility and Water Buoyancy
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Solution Overview
Problem
Conventional personal floatation devices are uncomfortable to wear and restrict movement when not in use, leading to non-compliance during water activities due to their design limitations.
Innovation Solution
A belt-like personal floatation device with selectively inflatable bladders that can be rolled up for storage and easily inflated for use, featuring a manual or automatic inflation mechanism and a design that allows for greater mobility and comfort on land.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the personal floatation device uses traditional rigid buoyant structures, then it provides reliable buoyancy support, but it restricts user movement and causes discomfort when worn on land
Solution Approach 1:
The patent applies the dynamics principle by using inflatable bladders that can transition between deflated and inflated states. When deflated, the bladders are compact and allow free movement on land; when inflated, they provide the necessary buoyancy support in water. This dynamic transformation resolves the contradiction between comfort on land and reliability in water.
Solution Approach 2:
The patent employs parameter changes by altering the volume and pressure of the buoyant bladders. The bladders can be inflated to a specific volume to provide adequate buoyancy force, and deflated to a minimal volume for comfortable wear on land. This parameter transformation enables the device to adapt to different operational conditions.
2Reliability
If the personal floatation device uses fully inflated bladders for reliable buoyancy, then it provides adequate floatation support, but it becomes uncomfortable and restrictive when not in use
Solution Approach 1:
The inflatable bladder system allows the device to dynamically adjust its state between operational (inflated) and storage (deflated) modes. This dynamic capability enables extended wearability on land by deflating the bladders, while ensuring reliable floatation support when needed by inflating them.
3Ease of operation
If the personal floatation device uses compact storage design, then it improves portability and comfort on land, but it increases deployment time when needed
Solution Approach 1:
The patent incorporates preliminary action by including an automatic inflation mechanism that is pre-positioned and ready to deploy. When activated, the mechanism automatically inflates the bladders using stored gas or air, eliminating the need for manual inflation steps and minimizing deployment time while maintaining compact storage when not in use.
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
Enhances user comfort and mobility on land while providing quick and effective buoyancy support when needed, encouraging consistent wear and rapid deployment in emergency situations.
Implementation Method 1
the bladders can be inflated with a gas or otherwise filled with a buoyant material... to provide a personal floatation device that supports the user in a body of water
Data Source
AI summary
A personal floatation device includes a housing and a plurality of bladders disposed within the housing. The plurality of bladders are movable between a non-deployed position within the housing and extendable from the housing to a deployed position. A device is provided for selectively filling the bladder with a substance that is buoyant in water and causing the bladder to be moved from the non-deployed position to the deployed position. The bladder filling and deploying mechanism can be a cartridge that contains a supply of a compressed gas.