Meter Box Cover Structure for Tamper-Resistant Ringless Sockets
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Solution Overview
Problem
Existing meter box covers are not tamper-resistant and lack durability, as they can be easily pried out of position and are not structurally robust enough to withstand extended exposure in the field, particularly when used with ringless meter sockets.
Innovation Solution
A meter box cover design featuring a first portion that engages the inner surface of the lid and a second portion that extends beyond the outermost surface of the lid, preventing displacement and unauthorized access, with a unitary molded construction from impact-resistant materials like polycarbonate, and secure locking mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a thin metal plate cover is used, then the cover can be easily manufactured, but it lacks structural rigidity and can be pried out
Solution Approach 1:
The cover combines a rigid metal ring structure with a plastic cover body to create a composite component that provides both structural strength and ease of manufacture. The metal ring portion embedded in the plastic provides the necessary rigidity while the plastic portion allows for cost-effective molding and assembly.
2Ease of operation
If the cover fits loosely in the opening, then it is easy to install, but it can be pried out and removed
Solution Approach 1:
The cover extends beyond the plane of the lid opening in a perpendicular dimension, with the metal ring portion protruding through the opening. This three-dimensional configuration prevents prying removal while maintaining straightforward installation by simply placing the cover over the opening.
3Ease of manufacture
If a plastic cover with thin metal plate is used, then manufacturing is simple, but it cannot withstand field abuse over extended periods
Solution Approach 1:
The combination of rigid metal ring and durable plastic creates a composite cover that withstands field abuse. The metal ring provides structural integrity against physical abuse while the plastic provides environmental resistance and corrosion protection, together ensuring long-term durability.
Data Source
AI summary
A meter box cover including a first portion that engages an inner surface of an opening in a lid of a meter box to prevent the passage of the cover through the opening and a second portion that extends through the opening and beyond an outermost surface of the opening in the lid of the meter box. The meter cover blocks substantially an entirety of the opening and the second portion prevents the cover from being displaced within the opening.