Vent Stop Wedge Protrusion and Spring Clip Retention
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Solution Overview
Problem
Existing window vent stops are limited in their ability to be installed in windows without hollow frames, such as new wood windows or older windows, and often require mechanical fasteners for installation, which can be inconvenient and insecure.
Innovation Solution
A vent stop design that incorporates a wedge-shaped protrusion and arcuate flanges for secure installation without screws, along with a deformable spring clip for enhanced retention, allowing for easy installation into windows with or without hollow frames and preventing removal once installed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mounting clips are used for installation, then installation is simplified for hollow frames, but the vent stop cannot be installed in windows without hollow frames
Solution Approach 1:
The vent stop housing incorporates multiple retention features (wedge-shaped protrusion for friction fit, arcuate flanges for expansion engagement, and deformable spring clips) that enable installation in both hollow-frame and solid-frame windows, making the device universally applicable across different window types without requiring separate installation kits
2Strength
If mechanical fasteners such as screws are used, then retention strength is improved, but installation complexity and time increase
Solution Approach 1:
The vent stop employs self-retaining features including a wedge-shaped protrusion that creates friction fit upon insertion, arcuate flanges that expand to engage the window frame, and deformable spring clips that automatically snap into place. These self-service retention mechanisms eliminate the need for separate mechanical fasteners like screws, maintaining strong retention while preserving installation simplicity
3Productivity
If the vent stop is designed for easy installation, then installation time is reduced, but resistance to removal may be compromised
Solution Approach 1:
The retention features exhibit asymmetric behavior: during installation, the wedge-shaped protrusion inserts smoothly and the arcuate flanges expand outward to engage the frame, while during removal attempts, the same features create increasing friction and mechanical interference. The deformable spring clips are biased to maintain constant engagement pressure, making removal significantly more difficult than installation without requiring additional fasteners
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
Enables easy and secure retrofit installation into various window types without mechanical fasteners, providing effective resistance to removal and ensuring the vent stop remains securely in place.
Implementation Method 1
A first means of securing the opposite end may comprise one or more arcuate flanges on housing side walls. These arcuate flanges may be adapted to unidirectional movement so as to permit its movement relative to the window opening during pivotal installation of the stop, but thereafter deterring counter-pivotal motion that would allow deliberate or inadvertent removal of the vent stop.
Data Source
AI summary
A vent stop is installed into a window/door to limit travel therein of a sash member, and being particularly adapted to permit ease of its installation, especially into a wooden door/window. The stop incorporates multiple retention features to inhibit the stop's removal, once properly installed. The retention features include a wedge-shaped protrusion located at a distal end of the stop housing, which engages the wood of the window opening when pivotally installed therein, to secure a first end of the stop. The opposite end of the stop may be redundantly secured. A first feature for securing the opposite end may comprise one or more arcuate flanges on housing side walls, flanges being adapted to unidirectional movement so as to permit its movement relative to the window opening during installation, but thereafter deterring counter-pivotal motion that would allow removal of the vent stop. A second feature comprises a deformable spring clip.