Coiled Garden Hose With Metal Shell for Kink-Resistant Rewinding
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Solution Overview
Problem
Conventional garden hoses are either heavy and stiff, prone to damage, or lightweight and prone to kinking and puncturing, and lack automatic rewinding features, making them difficult to manage and store, especially in garden or home settings where frequent repositioning and stress are common.
Innovation Solution
A coiled hose design featuring a flexible strip-wound metal cover made from materials like 304 stainless steel, providing puncture resistance, abrasion resistance, and UV resistance, while being lightweight and easy to manage, with a flexible outer casing that allows the hose to automatically rewind into a compact coiled configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional rubber hoses are used, then they provide durability and resistance to damage, but they are heavy and stiff, making them difficult to handle and store
Solution Approach 1:
The hose combines an inner PVC tube with an outer metal shell to create a composite structure that achieves both durability and light weight. The metal shell provides strength and resistance to damage, while the PVC core maintains flexibility, resulting in a hose that is both durable and lightweight.
2Weight of moving object
If lightweight plastic hoses are used, then they are easy to handle, but they kink and puncture easily
Solution Approach 1:
The composite structure of an inner PVC tube surrounded by an outer metal shell provides both light weight and high reliability. The metal shell protects against kinks and punctures while the PVC core maintains flexibility, solving the problem of lightweight hoses being too fragile.
3Strength
If metal-shelled hoses are used, then they provide puncture and crush resistance, but they cannot be pulled at sharp angles without kinking the metal shell
Solution Approach 1:
The hose features a transition zone with a larger radius of curvature that allows the metal shell to bend smoothly when pulled at angles. This localized design change prevents kinking at critical stress points while maintaining the overall strength and puncture resistance of the metal shell.
4Length of moving object
If conventional hoses are used, then they can be stretched to reach remote locations, but they require manual winding for storage
Solution Approach 1:
The hose incorporates a spring mechanism that automatically rewinds the hose into its storage coil after use. This self-service feature eliminates the need for manual winding, saving time and effort while maintaining the hose's full length capability for reaching remote locations.
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 hose is durable, resistant to punctures and kinking, and can be easily extended and retracted, maintaining an open flow path without pressure, addressing the limitations of existing hoses by offering a lightweight, flexible, and automatic rewinding solution.
Implementation Method 1
when you stretch it out to full length the hose will contract, like a spring, back to its resting, coiled configuration
Implementation Method 2
the hose will contract, like a spring, back to its resting, coiled configuration
Data Source
AI summary
A coiled hose assembly includes a flexible outer shell formed over a flexible, water-tight inner tubing with hose fittings at both ends, where the assembly is wound around a cylindrical form and heated to anneal the assembly into a coiled configuration.