Impact-Resistant Door Light Assembly with Multi-Layer Pane
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Solution Overview
Problem
Metal doors with enclosed windows, often used in storm shelters, face failure under high-velocity wind conditions due to the impact shattering or pushing of the window pane, necessitating an improvement in impact resistance.
Innovation Solution
A door design featuring a light assembly with an impact-resistant pane, comprising multiple layers adhered to trims and the door body, which is secured within a cavity with a larger opening than the pane, providing enhanced structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-pane light is installed in a metal door for viewing conditions, then the door provides visibility functionality, but the pane is vulnerable to shattering or being pushed through during high-velocity wind impact
Solution Approach 1:
The patent applies composite materials by using a multi-layer pane construction consisting of an outer layer, intermediate layer(s), and inner layer adhered together with adhesives. This composite structure distributes impact forces across multiple layers, preventing the pane from shattering or being pushed through during high-velocity wind events, while maintaining visibility functionality.
Solution Approach 2:
The patent segments the light pane into multiple distinct layers (outer layer, intermediate layer(s), inner layer) that are adhered together. This segmentation allows each layer to independently absorb and distribute impact forces, enhancing overall impact resistance while maintaining the transparency needed for visibility.
2Reliability
If a multi-layer impact-resistant pane is installed in the door, then the impact resistance is significantly enhanced, but the device complexity increases due to multiple layers and trims
Solution Approach 1:
The patent merges multiple functional elements into an integrated light assembly unit that includes the multi-layer pane, outer trim, and inner trim as a single assembled component. This merging approach maintains impact resistance while simplifying installation and reducing the number of separate assembly steps, thereby managing device complexity.
Solution Approach 2:
The patent introduces an inner trim as an intermediary element positioned between the multi-layer pane and the door opening. This inner trim acts as a mediator that secures the pane assembly to the door body, distributing loads and simplifying the connection mechanism, thereby managing complexity while maintaining structural integrity.
3Area of stationary object
If the pane area is made larger than the panel opening to ensure coverage, then the light provides better visibility, but the installation complexity increases due to the larger pane fitting requirements
Solution Approach 1:
The patent segments the overall light assembly into modular components: the multi-layer pane, outer trim, and inner trim. This segmentation allows the pane to be manufactured at a larger area for optimal visibility while the trim components are separately manufactured and assembled, reducing the complexity of handling and installing the complete assembly.
Solution Approach 2:
The patent extracts the trim components from the pane itself, creating separate outer trim and inner trim elements that frame and secure the pane. This extraction allows the pane to be optimized for maximum area and visibility while the trims handle the structural integration and installation complexity, enabling independent optimization of each component.
Data Source
AI summary
An exemplary door includes a door body and a light assembly. The door body includes a first door panel defining a first panel opening, a second door panel defining a second panel opening, and an internal cavity. The area of the first panel is greater than the area of the second panel opening. The light assembly includes a first trim, a second trim, and an impact-resistant pane positioned in the door cavity. The first trim includes an outer frame coupled to the first door panel and an inner frame positioned in the internal cavity. The pane has an area greater than the area of the second panel opening area, and includes an first outer layer adhered to the inner frame of the first trim, a second outer layer adhered to the door body, and at least one intermediate layer.