Filter Element Electrostatic Protection Using Conductive Support Paths

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Solution Overview

Problem

Plastic components in filtration systems accumulate electrostatic charge when used with low conductivity fluids, leading to static discharge that can damage components and pose safety risks, necessitating costly metal components or complex grounding solutions.

Innovation Solution

A filtration system with a self-contained electrostatic buildup protection mechanism using internal electrical circuits within the filter element, employing conductive components like endcaps and centertubes to form a conductive path between opposing charges, eliminating the need for chassis grounding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If plastic components are used in filtration systems, then cost and environmental impact are improved, but electrostatic charge accumulation occurs leading to component damage and safety issues

Engineering Contradiction:

Improvemanufacturing costVSAvoidelectrostatic discharge damage

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

A conductive fluid pathway is introduced as an intermediary mechanism between the filter media and the fluid stream. This pathway captures electrostatic charges on the filter media surface and conducts them into the flowing fluid, which then carries the charges away from the filter element, preventing charge accumulation and subsequent discharge damage to plastic components

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The electrical conductivity parameter of the fluid pathway is utilized to enable charge transport. By recognizing that the flowing fluid has sufficient conductivity to carry charges, the system transforms the fluid from a passive carrier into an active electrostatic charge transport medium, allowing plastic components to remain while preventing ESD damage

Inventive Principle:

Principle #35Parameter changes

2Reliability

If metal components are used in filtration systems, then electrostatic discharge protection is improved, but manufacturing cost increases

Engineering Contradiction:

Improveelectrostatic discharge protectionVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The invention replaces expensive metal components with a cost-effective alternative: a conductive fluid pathway that uses the naturally conductive property of the filtered fluid to provide ESD protection. This approach achieves the same protective function as metal grounding systems but at lower material and manufacturing cost

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The flowing fluid serves a dual function: it performs the primary filtration task and simultaneously acts as the electrostatic charge transport medium. The fluid's own conductivity property is harnessed to protect the system, eliminating the need for separate metal grounding components and reducing overall system cost

Inventive Principle:

Principle #25Self-service

3Reliability

If grounding systems are implemented, then electrostatic discharge protection is improved, but system complexity increases

Engineering Contradiction:

Improveelectrostatic discharge protectionVSAvoidgrounding system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The electrostatic protection function is merged with the existing fluid flow path and filter structure. The conductive pathway is integrated into the filter element itself, utilizing the fluid stream that already passes through the filter. This consolidation eliminates separate grounding systems and reduces overall system complexity while maintaining ESD protection

Inventive Principle:

Principle #5Merging (Combining)

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

Effectively reduces electrostatic discharge without additional metal components, maintaining cost-effectiveness and system integrity while preventing component damage and safety hazards.

Implementation Method 1

A potential drawback of the use of plastic is the tendency of the plastic components to accumulate electrostatic charge when used with flowing low conductivity fluids. The voltage buildup gives rise to static discharge as the result of the physical separation of positive and negative charge.

Methodology Applied

Scientific EffectElectrostatic discharge: Electrostatic Discharge

Implementation Method 2

The support element is conductive. The support element and the surface of the filter media form an electrical circuit between the first pole and the second pole.

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12496539B2Filter element with self-contained electrostatic buildup protection

Publication Date: 2025.12.16 ATMUS FILTRATION IP INC

AI summary

One embodiment relates to a filtration system. The filtration system includes a filter housing and a filter element. The filter housing defines a central cavity. The filter element is disposed within the central cavity. The filter element includes a first endcap, a second endcap, and filter media. The second endcap is disposed axially away from the first endcap. The filter media extends axially between the first endcap and the second endcap. The filter media includes a filter media surface. A support element is in contact with the filter media. The support element is conductive. A first pole is along a surface of support element the filter media. The first pole has a first charge. A second pole is downstream of the first pole. The second pole has a second charge. The first charge is opposite in charge to the second charge.