Square Electrical Box Lips for Standard Mud Ring Fit
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Solution Overview
Problem
The lack of a standardized mud ring for 5-inch square electrical boxes results in inconsistent mounting aperture positions, requiring different mud rings for each manufacturer's version, leading to high manufacturing complexity and gaps when using smaller mud rings with larger boxes, which is not permissible under current standards.
Innovation Solution
A five-inch square electrical box design with integrated lips that form a continuous surface around the perimeter, allowing a 4 and 11/16-inch mud ring to fit securely without gaps, and a method for mounting covers using aligned openings and fasteners to eliminate gaps between the cover and box edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a smaller mud ring is used with a larger 5-inch square box, then the mud ring can be manufactured using existing designs, but gaps are created between the mud ring edge and the box opening edge which is not permissible under current standards
Solution Approach 1:
The patent introduces lips extending from the sides of the electrical box that create an intermediate dimensional feature. These lips reduce the effective opening size from 5 inches to match the 4 11/16 inch mud ring, allowing the smaller mud ring to fit properly without gaps while maintaining compatibility with existing mud ring designs
2Adaptability or versatility
If different versions of 5-inch square boxes are manufactured by different manufacturers, then each manufacturer can optimize for their specific needs, but inconsistent mounting aperture positions require different mud rings for each version
Solution Approach 1:
The patent creates a universal mounting interface by standardizing the lip configuration and mounting aperture positions. This allows a single mud ring design to be compatible with all 5-inch square boxes regardless of manufacturer, while still allowing manufacturers flexibility in their overall box design and other features
3Adaptability or versatility
If mounting apertures are positioned at different locations on 5-inch square boxes, then each manufacturer can optimize mounting configurations, but multiple mud ring designs must be manufactured to accommodate each version
Solution Approach 1:
The patent establishes a universal mounting aperture pattern that works with a single standardized mud ring design. This eliminates the need to manufacture multiple mud ring versions while still allowing manufacturers flexibility in their box designs, thereby improving mud ring manufacturing efficiency through standardized production
Data Source
AI summary
An electrical box that includes a bottom wall, a first side wall, and a second side wall. The first side wall extends from the base wall. The second side wall extends from the base wall and is oriented substantially perpendicularly to the first side wall. A first lip extends from the first side wall. The first lip has a first tab with a first opening. A second lip extends from the second side wall. The second lip has a second tab with a second opening. The first lip and the second lip contact at an interface. The interface includes a continuous surface between the first lip and the second lip.