Flexible Folding Sling with Mobius Loops for Load Distribution
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Solution Overview
Problem
Conventional methods for carrying multiple heavy objects, such as plastic bags, cause discomfort and strain on the hands due to weight distribution, and are not suitable for individuals with reduced strength or mobility, limiting their ability to carry items independently.
Innovation Solution
A flexible folding sling with tear-shaped Mobius loops and a securing mechanism, allowing configuration as a hand-sling, shoulder-sling, or back-sling, which distributes the load away from the hands and facilitates comfortable carrying of multiple bags or objects by securing handles and orienting them for efficient transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If plastic bags with handles are used to carry multiple items, then the number of objects that can be carried is increased, but the weight causes discomfort and pain to the hand
Solution Approach 1:
The patent introduces a sling as an intermediary device between the hand and the plastic bags. The sling has a first loop that secures to the wrist and a second loop that captures the bag handles, transferring the load-bearing function from the hand to the wrist and arm, thereby eliminating hand discomfort while maintaining the ability to carry multiple bags
2Productivity
If heavy bags are carried by hand, then the bags can be transported, but the small muscles and ligaments of the hand become tired quickly
Solution Approach 1:
The sling acts as a mediator that redistributes the mechanical load from the vulnerable hand structures to the more robust wrist and arm structures. The first loop secures to the wrist while the second loop captures the bag handles, allowing continuous carrying without hand fatigue
3Adaptability or versatility
If individuals with reduced strength or mobility attempt to carry items by hand, then they may maintain independence, but they lack the strength to carry routine items
Solution Approach 1:
The sling provides mechanical assistance by transferring the carrying load from the weakened hand to the stronger wrist and arm structures. This intermediary device enables individuals with reduced hand strength to perform routine carrying tasks independently
Solution Approach 2:
The sling changes the mechanical parameters of the carrying system by altering the load distribution points from the hand to the wrist and arm, making the carrying task accessible to individuals with varying levels of hand strength
Data Source
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AI summary
A flexible folding sling includes a flexible elongate preform strap having first and second ends, each of the first and second ends folded inward toward a strap center to form respective first and second loops. The first and second ends are fastened to the strap center with each of the first and second loops having a half-twist such that each of the first and second loops is a tear-shaped Mobius loop. The flexible folding sling assists a user in carrying bag(s) having handles, or other objects that include handles or like structure. When used to carry bags, the sling can be configured as a hand-sling, a shoulder-sling or a back-sling. When used as a hand-sling, the sling engages the user's wrist in a secure and comfortable manner. This prevents load transmission through the easily tired hand muscles and ligaments, extending the amount of time the user can carry a load. This also allows the user to maintain use of her hand and fingers while the sling is used.