Dual-Hook Spring Fastening System for Universal Wraparound Step Covers
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Solution Overview
Problem
Existing step cover solutions face challenges in being universally applicable across various step sizes and shapes, particularly in the RV industry, where traditional fastening methods require multiple grommets and components, and existing removable covers suffer from puckering issues due to uneven tension, posing safety hazards.
Innovation Solution
A dual-hook spring fastening system with an extender that allows for adjustable length, providing linear and transverse tension to secure a wraparound step cover across different step heights and widths, reducing the need for multiple grommets and attachment points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fastening methods with multiple grommets and spring hooks are used, then the step cover can be securely attached, but the device complexity and number of components increase
Solution Approach 1:
The patent combines multiple fastening functions into a single integrated spring mechanism with dual hooks at one end and a single hook at the other end. This merged design eliminates the need for separate grommets, multiple springs, and complex latching systems, reducing component count while maintaining secure attachment reliability
Solution Approach 2:
The spring fastener is designed to perform multiple functions: it provides tensioning, positioning, and securing in a single component. The spring mechanism can accommodate various step configurations and cover sizes, making it a universal solution that replaces multiple specialized fastening components
2Ease of operation
If removable step covers are used with cords and latches, then the covers can be easily removed and reinstalled, but the cords create non-uniform pulling forces that cause puckering
Solution Approach 1:
The spring mechanism provides dynamic, elastic tensioning that automatically adjusts to the cover's position and tension requirements. Unlike rigid cords that create fixed pulling forces, the spring adapts its tension distribution to maintain uniform force application across the cover, preventing puckering while allowing easy removal and reinstallation
Solution Approach 2:
The spring's physical parameters (coil density, wire diameter, free length) are optimized to provide uniform tension distribution. By changing the spring's mechanical properties, the system achieves even force application that prevents cover deformation while maintaining the desired removability characteristic
3Adaptability or versatility
If a universal step cover is designed to work with various step heights and depths, then the adaptability increases, but the fastening system requires more components to accommodate the variations
Solution Approach 1:
The spring fastener is designed as a universal component that can accommodate various step heights and depths through its elastic properties. The spring's ability to stretch and compress allows it to adapt to different geometries without requiring multiple specialized fasteners for different step configurations
Solution Approach 2:
The spring's physical parameters allow it to adapt to different step dimensions. By utilizing the spring's inherent elasticity and adjustable tension, the same fastening component can effectively secure covers on steps of varying heights and depths, achieving universality without increasing component 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 system enables a universal step cover to securely attach to various step sizes and shapes with fewer fastening points, minimizing material usage and labor, while maintaining aesthetic appeal and safety by distributing tension evenly.
Implementation Method 1
A dual-hook spring fastening system with an extender that allows for adjustable length, providing linear and transverse tension to secure a wraparound step cover
Data Source
AI summary
A universal wraparound cover fastening system wherein the cover includes opposed ends mated with a fastening system. The fastening system includes a dual hook spring mechanism, with a first end affixed to an attachment point on the cover, and the opposite end hook mated with an extender. The extender includes at least one eyelet for attaching to the dual hook spring and a hook opposite the eyelet for mating with an attachment point on an opposite end of the cover around a step. The extender may include one or more eyelets along its length. Eyelets may include a single curl, or multiple coils. The wraparound cover can therefore be fitted over numerous side supported step types and sizes with varied extenders to minimize needs to provide additional attachment points on the step covers.