Utility Cover Air Venting and Composite Reinforcement
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Solution Overview
Problem
Existing utility enclosure covers, particularly concrete covers, are heavy, brittle, and prone to chipping during transport and installation, making them difficult to handle and costly due to high rates of damage. Additionally, current polymer covers cannot withstand heavy loads in roadways or driveways, and they tend to float in water, posing issues in flood-prone areas.
Innovation Solution
A polymer/composite utility enclosure cover with an integrated air vent system to prevent flotation in water, combined with an over-molded metal grid for enhanced strength and load-bearing capacity, and designed to accommodate multiple meter reading methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If concrete covers are used to withstand heavy loads, then load-bearing capacity is improved, but weight increases making them difficult to transport and install
Solution Approach 1:
The patent uses a composite material consisting of polymer matrix combined with metal grid reinforcement (such as steel or aluminum). This composite structure provides the load-bearing capacity of metal while maintaining the lightweight and corrosion-resistant properties of polymer, directly resolving the contradiction between strength and weight
Solution Approach 2:
The metal grid is strategically positioned within the polymer cover at areas experiencing highest stress concentrations. This localized reinforcement approach provides maximum strength where needed while minimizing overall weight addition, allowing the cover to withstand heavy loads without requiring uniform thickening throughout
2Reliability
If concrete covers are used for heavy duty protection, then durability is improved, but brittleness increases causing chipping during transport and installation
Solution Approach 1:
The polymer-metal grid composite combines the ductility and impact resistance of metal with the corrosion resistance and structural integrity of polymer. This composite structure eliminates the brittleness issue of concrete while maintaining durability through the synergistic properties of both materials
Solution Approach 2:
The polymer matrix acts as a cushioning medium that absorbs and distributes impact forces before they can cause damage to the metal grid or result in chipping. This prior cushioning effect protects the cover structure during transport and installation, preventing the kind of damage that occurs with brittle concrete covers
3Weight of moving object
If polymer covers are used to reduce weight, then ease of installation is improved, but load-bearing capacity decreases making them unsuitable for roadways
Solution Approach 1:
The patent creates a polymer-metal grid composite that achieves the load-bearing capacity of heavy concrete covers while maintaining the lightweight advantage of polymer covers. The metal grid provides structural reinforcement that enables the thin polymer cover to support heavy roadway loads without requiring the weight of solid concrete
Solution Approach 2:
The metal grid is strategically placed in high-stress zones to provide localized reinforcement exactly where load-bearing capacity is needed. This allows the cover to achieve roadway-grade strength without uniformly increasing thickness or weight across the entire cover surface
4Weight of moving object
If covers have voids to reduce weight, then weight decreases improving handling, but buoyancy increases causing flotation in water
Solution Approach 1:
The patent incorporates pigmented master batch material during the extrusion process to provide UV resistance and aesthetic appearance. The coloring process occurs simultaneously with manufacturing, integrating the protective function into the base material without adding separate components or increasing weight
Solution Approach 2:
The polymer-metal grid composite structure provides inherent stability in water. The metal grid adds sufficient weight to counteract the buoyancy effect of the hollow cellular structure, while the polymer provides corrosion resistance. This composite approach solves the flotation problem without requiring solid filling that would eliminate the weight-reducing voids
5Reliability
If polymer covers are used instead of concrete, then corrosion resistance is improved, but UV degradation becomes a concern requiring additional protection
Solution Approach 1:
The patent incorporates UV-resistant pigmented master batch material directly into the polymer matrix during the extrusion process. This integrates UV protection into the base material itself, eliminating the need for separate protective coatings while maintaining the corrosion-resistant properties of the polymer
Solution Approach 2:
The patent combines multiple functions into the base polymer material: structural integrity, corrosion resistance, UV protection through pigmented master batch, and aesthetic appearance. This merging of functions into a single integrated material system eliminates the need for separate protective layers or components, simplifying the overall cover design
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
The polymer/composite cover effectively prevents flotation in water, supports heavy loads, and allows for various meter reading methods, while being lighter and more durable than traditional concrete covers, reducing installation challenges and costs.
Implementation Method 1
A 36 in.×24 in. cover will require the cover to weigh more than 120 lb. to prevent it from floating due to entrapped air in the voids. The air vents having channels constructed to vent air in the spaces to an exterior of the cover, thereby preventing flotation of the cover in water.
Data Source
AI summary
A cover for a utility enclosure includes a cover having a top, a bottom, a front side, a rear side, a left side, and a right side, defining an interior. The cover further includes a plurality of ribs in the interior dividing the interior into a plurality of spaces. The cover further includes the top having one or more air vents. The cover further includes the air vents having channels constructed to vent air in the spaces to an exterior of the cover, thereby preventing flotation of the cover in water.