Outdoor Junction Box Mount With Sealant Injection for Roof Penetrations
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Solution Overview
Problem
Existing electrical junction boxes are not well-suited for outdoor environmental conditions, as they can deteriorate due to water and heat exposure, and those intended for outdoor use often suffer from moisture damage despite partial sealing, increasing the risk of damage to attached structures.
Innovation Solution
A junction box with an integrated sealing system that allows for a permanent airtight and watertight seal, eliminating the need for standard flashings and reducing installation complexity by using a sealant injection system to fill voids around roof penetrations, thereby reducing costs and installation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a junction box is partially environmentally sealed for outdoor use, then it can be installed on exterior surfaces, but moisture from weather conditions builds up around the junction box causing damage
Solution Approach 1:
The patent combines the sealing function with the mounting function by integrating a mounting gasket that simultaneously attaches the junction box to the roof and seals the penetration area. The sealant injection system merges the sealing process with the installation process, creating a unified solution that addresses both mounting and moisture protection needs.
Solution Approach 2:
The patent introduces a mounting gasket as an intermediary component between the junction box and the roof surface. This gasket creates a sealed barrier that prevents moisture ingress while facilitating proper installation. The sealant acts as another intermediary substance that fills voids and enhances the sealing effectiveness.
2Reliability
If standard flashings are used to seal roof penetrations, then some moisture protection is provided, but installation complexity increases and time is consumed
Solution Approach 1:
The patent extracts the sealing function from the traditional flashing system and integrates it directly into the junction box assembly through the mounting gasket. This eliminates the need for separate flashing components and simplifies the installation process while maintaining effective moisture protection.
Solution Approach 2:
The sealant injection system allows the installer to self-seal the penetration area directly at the installation site through the injection port. This eliminates the need for pre-application of sealants or complex flashing assemblies, enabling quick and effective sealing during the installation process.
3Reliability
If sealant is injected into the enclosed space, then air is forced out through the vent and voids are filled, but the injection process requires precise control
Solution Approach 1:
The patent incorporates a vent port that provides visual and functional feedback during the sealant injection process. As sealant is injected, air and excess sealant exit through the vent, providing real-time feedback on the filling progress. This simple feedback mechanism allows the installer to control the injection process without complex monitoring systems.
Data Source
AI summary
An electrical junction box mount apparatus including a base for mounting to a mounting surface and a lid sized to seal against the base. The base includes a mounting portion having a penetration area. A periphery of the penetration area is circumscribed via a groove formed into a bottom surface of the base such that upon placing the base on a mounting surface, the groove encloses empty space within the groove against the mounting surface.