Personal Flotation Device Buoyancy Alignment
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Solution Overview
Problem
Conventional personal flotation devices often cause users to become unbalanced and uncomfortable in the water due to misalignment of the center of gravity and buoyancy, potentially leading to flipping over and difficulty staying upright.
Innovation Solution
A wearable personal flotation device featuring a shirt with a front flotation pad positioned above the midriff and buoyant sleeves on the arms, ensuring the center of buoyancy is at or above the center of gravity, along with adjustable side pads and secure fastening, to maintain stability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flotation pad is positioned on the user's torso, then the user's center of buoyancy is positioned at or above the user's center of gravity, but the device complexity increases due to multiple flotation components
Solution Approach 1:
The flotation device is divided into multiple independent flotation pads (front flotation pad, side flotation pads, and rear flotation pad) that can be separately positioned and adjusted. This segmentation allows each pad to contribute to the overall buoyancy distribution, enabling precise control over the center of buoyancy position to maintain user stability without requiring a single large complex structure
Solution Approach 2:
The invention transitions from conventional single-point or single-area flotation to a distributed three-dimensional flotation system. By positioning flotation pads at multiple locations (front, sides, and rear) and adjusting their vertical positions, the system creates a volumetric buoyancy distribution that precisely controls the center of buoyancy position in three-dimensional space, resolving the stability-complexity contradiction
2Reliability
If the center of buoyancy is positioned at or above the center of gravity, then the user remains upright and stable, but the user's range of movement may be restricted
Solution Approach 1:
The flotation device incorporates adjustable and flexible components that allow the flotation pads to move and adapt with the user's body movements. The side flotation pads can be positioned at different heights and angles, and the overall configuration can be adjusted to maintain stability while accommodating various arm and body positions, thus preserving range of motion while ensuring upright stability
3Reliability
If multiple flotation pads are used to align center of buoyancy with center of gravity, then user safety is improved, but the device becomes more complex and harder to manufacture
Solution Approach 1:
The device uses multiple independent flotation pads that can be manufactured as separate standard components and then assembled together. This segmentation into modular units simplifies the manufacturing process for each individual component while achieving the complex safety function through their coordinated arrangement, making the overall system easier to manufacture despite having multiple parts
Solution Approach 2:
The flotation pads are designed with universal characteristics that allow them to serve multiple functions: providing buoyancy, positioning the center of buoyancy, and adapting to different user sizes and positions. This multi-functionality reduces the need for specialized custom components, thereby simplifying manufacturing while maintaining high safety performance
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 device keeps users safe and upright in the water while allowing for comfortable movement by aligning the center of buoyancy with the center of gravity, preventing flipping and enhancing visibility and freedom of movement.
Implementation Method 1
a front flotation pad attached to the shirt and positioned on a user's torso; and two flotation sleeves, each flotation sleeve attached to one of the shirt's two sleeves. The front flotation pad is positioned above the user's midriff (waist or stomach) such that the user's center of buoyancy is positioned at or above the user's center of gravity
Data Source
AI summary
An improved personal flotation device is disclosed. The personal flotation device comprises a shirt with sleeves, a torso flotation pad attached to the shirt and positioned around a user's torso, and two flotation sleeves attached to the shirt's sleeves on a user's arms. The torso flotation pad comprises a front flotation pad which is raised above the midriff area of the user and two graduated side pads which are wrapped around a user's torso. The raised position of the front flotation pad keeps a user's center of buoyancy above the user's center of gravity, raising the user higher up out of the water and preventing the user from flipping over into the water. The flotation sleeves are positioned high on a user's arms to further increase a user's freeboard while permitting freedom of movement.