Multipurpose Flotation Device with Hinged Panels
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Solution Overview
Problem
Traditional throwable Personal Flotation Devices (PFDs) are limited in their design, primarily serving as rigid foam rings or rectangular cushions, which restrict their multipurpose functionality and user comfort, especially in terms of shape and versatility.
Innovation Solution
A multipurpose throwable PFD design featuring a pair of flat buoyant panels pivotally connected at inward ends to a central buoyant panel with parallel hinges, enclosed in a fabric cover, and equipped with a strap handle for throwing, allowing the device to be folded into a U-shape for various uses such as a seat, back, and water support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigid foam ring design is used, then the device meets buoyancy requirements, but the device lacks multipurpose functionality and user comfort
Solution Approach 1:
The flotation device is divided into multiple separate buoyant panels (first panel, second panel, third panel, fourth panel) that can be independently positioned and configured. These panels are connected through fabric covers and stitching rather than being rigidly integrated, allowing each panel to function semi-independently while contributing to overall buoyancy. This segmentation enables the device to adapt to multiple uses (seat cushion, back cushion, throwable PFD) without requiring a complex rigid structure.
Solution Approach 2:
The device is designed to perform multiple functions through a single configuration of buoyant panels and fabric covers. The same panels that provide buoyancy for water rescue can be arranged to form a seat cushion, a back cushion, or both simultaneously. The fabric covers with stitching connections serve both structural and functional purposes, allowing the device to be versatile without increasing complexity.
2Adaptability or versatility
If a rectangular or square cushion shape is used, then the device can serve as a seat or back cushion, but the shape is unnecessarily restrictive and limits versatility
Solution Approach 1:
The device transitions from a fixed geometric shape to a dynamic configuration that can adapt to different uses. The buoyant panels are connected through flexible fabric covers with stitching, allowing the structure to be arranged in various configurations (flat for seat cushion, upright for back cushion, or folded for both). This dynamic arrangement capability eliminates the restrictiveness of fixed rectangular or square shapes while maintaining cushion functionality.
3Ease of operation
If traditional throwable cushion design is used, then the device meets buoyancy requirements, but the device lacks comfort and multiple orientations for use
Solution Approach 1:
The rigid foam panels are enclosed in flexible fabric covers that are connected through stitching. This flexible enclosure system allows the buoyant panels to be arranged in different orientations and configurations while maintaining structural integrity. The fabric covers provide comfort against the user's body, and the stitching connections allow easy adjustment of panel positions to achieve desired orientations for seat, back, or combined use, enhancing ease of operation without significant complexity.
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 enhances the versatility and comfort of the PFD by enabling multiple orientations and uses, including as a seat, back, water support, and impact cushion, while maintaining compliance with buoyancy requirements and being inexpensive to manufacture and simple to use.
Implementation Method 1
Each of the panels is constructed of a closed cell foam material which is sufficiently buoyant to support a user's weight
Data Source
AI summary
A multipurpose throwable personal flotation device includes a pair of flat buoyant panels pivotally connected at inward ends to a central buoyant panel with parallel hinges. Each of the panels is enclosed in a fabric cover, with lines of stitching connecting layers of the cover between the panels forming the hinges. A strap is affixed along the upper faces of the panels, with two loops projecting beyond the ends of the panels to form handles for throwing the device.