Elastic Manhole Cover Casing for Grip and Impact Damping

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Solution Overview

Problem

Existing manhole covers cause tire abrasion, noise, and safety issues due to metal-to-metal contact and debris accumulation, compromising vehicle stability and safety.

Innovation Solution

An elastic casing made of elastomeric material with drainage channels and grip-enhancing features is applied to manhole covers to absorb impacts, reduce noise, and prevent debris accumulation, enhancing tire grip and safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a metal manhole cover is used, then durability and stability are improved, but tire abrasion and noise occur due to metal-to-metal contact

Engineering Contradiction:

ImprovedurabilityVSAvoidtire abrasion

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

An elastic casing made of elastomeric material is introduced as an intermediary layer between the metal manhole cover and the vehicle tire. This mediator absorbs impact energy through deformation, preventing direct metal-to-metal contact and thereby reducing tire abrasion while maintaining the structural strength of the underlying metal cover.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The surface properties of the manhole cover are changed by adding an elastic material layer with different mechanical parameters (higher elasticity, lower hardness) compared to the metal cover. This parameter change transforms the interaction characteristics between the cover and tire, reducing abrasion and impact forces.

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If a metal manhole cover is used, then structural stability is improved, but noise is generated due to impact between metal components

Engineering Contradiction:

Improvestructural stabilityVSAvoidnoise

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The elastic casing serves as a noise-dampening intermediary that absorbs impact energy through viscoelastic deformation. This prevents the transmission of impact forces between metal components, thereby reducing noise generation while preserving the structural stability of the metal cover beneath.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The elastic material provides beforehand cushioning by being pre-installed on the metal cover surface. This cushioning layer is ready to absorb impact energy before the actual tire-cover interaction occurs, preventing direct metal-to-metal impact and the associated noise.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Ease of manufacture

If a smooth metal cover surface is used, then manufacturing is simplified, but vehicle stability deteriorates due to debris accumulation and reduced tire grip

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidvehicle stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The elastic casing introduces local quality variations through integrated drainage channels and grip-enhancing surface features. These localized structural modifications improve water drainage and tire grip without requiring complex manufacturing processes for the entire cover assembly, maintaining ease of manufacture while enhancing vehicle stability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The solution uses a composite structure combining elastomeric material with integrated drainage and grip features. This composite approach allows the surface to provide both drainage functionality and enhanced friction characteristics, improving vehicle stability while the single-material construction maintains manufacturing simplicity.

Inventive Principle:

Principle #40Composite materials

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 elastic casing reduces tire wear, noise, and improves vehicle stability and safety by absorbing impacts and preventing debris accumulation, promoting safer road conditions.

Implementation Method 1

The elastic casing reduces impact between a vehicle's tires and the metal material of the manhole cover and subsequent noise resulting from such impact

Methodology Applied

Scientific EffectImpact absorption: Damping

Implementation Method 2

an elastic casing made of elastomeric material with drainage channels and grip-enhancing features is applied to manhole covers to absorb impacts

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 3

the top surface of the elastic casing (1) includes a plurality of drainage channels (6), which promote proper rainwater drainage

Methodology Applied

Scientific EffectGravity-driven flow: Gravitation

Data Source

PatentEP4686789A1Elastic casing for a manhole cover of a sewerage or stormwater network and related system

Publication Date: 2026.02.04 ALERTAPLATEIA LDA

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AI summary

The invention relates to an elastic casing (1) for a manhole cover of a sewerage or stormwater network and a related system comprising the elastic casing (1) for enclosing a manhole cover (10), which rests on a base frame (15). The elastic casing (1) features a surface made of a material with properties compatible with tire rubber, increasing the tire's grip on the manhole cover. The elastic casing (1) is made of a resilient material, which contributes to the absorption of impacts resulting from the collision of vehicle tires with the manhole cover, reducing noise due to shocks.