Filter Restriction Indicator Device for Visual Replacement

Solution Overview

Problem

Conventional filter assemblies lack an effective and cost-efficient way to determine when filter elements need replacement, often requiring premature replacement due to lack of pressure drop indication, leading to increased complexity and cost with existing restriction indicator devices.

Innovation Solution

A filter assembly with a restriction indicator device that includes an attachment and movable portion, which moves from a non-buckled to a buckled position at a predetermined pressure drop, providing a visual indication for filter replacement, and is designed to be low-cost and simple to integrate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional restriction indicator devices are used, then filter replacement indication is provided, but device complexity and cost increase significantly

Engineering Contradiction:

Improvefilter replacement indicationVSAvoidfilter assembly complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The restriction indicator device is merged with the filter element itself, making them a single integrated component. The indicator is molded as one piece with the filter element, eliminating the need for separate indicator devices and their associated mounting hardware, fittings, and pressure ports.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The filter element serves multiple functions: filtration and restriction indication. The indicator portion is integrated into the filter element structure, allowing the same component to perform both filtering and pressure drop monitoring functions simultaneously.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If conventional restriction indicator devices are used, then filter replacement indication is provided, but manufacturing cost increases

Engineering Contradiction:

Improvefilter replacement indicationVSAvoidmanufacturing cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The restriction indicator device is merged with the filter element itself, making them a single integrated component. The indicator is molded as one piece with the filter element, eliminating the need for separate indicator devices and their associated mounting hardware, fittings, and pressure ports.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The indicator device is designed as a disposable component that is discarded with the filter element after use. This eliminates the need for expensive, reusable indicator devices that require periodic resetting and maintenance.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Measurement precision

If conventional restriction indicator devices are used, then filter replacement indication is provided, but installation complexity increases

Engineering Contradiction:

Improvefilter replacement indicationVSAvoidinstallation complexity

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The restriction indicator device is merged with the filter element itself, making them a single integrated component. The indicator is molded as one piece with the filter element, eliminating the need for separate indicator devices and their associated mounting hardware, fittings, and pressure ports.

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

The solution allows for accurate and cost-effective indication of filter element replacement, reducing unnecessary replacements and maintaining filter performance by providing a clear visual cue when the filter reaches terminal restriction.

Implementation Method 1

The movable portion moves from the non-buckled position to the buckled position once a predetermined pressure drop between an upstream side and a downstream side of the restriction indicator is met

Methodology Applied

Scientific EffectPressure drop: Pressure Drop

Data Source

PatentUS11596890B2Restriction indicator device for filter assembly

Publication Date: 2023.03.07 ATMUS FILTRATION IP INC

AI summary

A filter element comprises a filter media and a restriction indicator device. The restriction indicator device comprises an attachment portion and a movable portion. The attachment portion is attachable to a portion of the filter assembly. The movable portion is movable relative to the attachment portion between a non-buckled position and a buckled position. The movable portion moves from the non-buckled position to the buckled position once a predetermined pressure drop between an upstream side and a downstream side of the movable portion of the restriction indicator device is met.