Radial Seal Filter Cold-Poured Urethane and Plastic Screen
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Solution Overview
Problem
Traditional air filter designs face issues such as inconsistent filter media and screen perpendicularity, damage during manufacturing and use, irregular filter identification, and inefficient debris release, leading to compromised filter effectiveness and durability.
Innovation Solution
The air filter design incorporates a plastic screen assembly with a cold-poured urethane seal and embedded filter identification ring, ensuring secure and protected filter media placement, consistent filter alignment, and efficient debris ejection, using a radial seal design and latch mechanism for shock absorption and recyclability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional heat process is used to apply urethane seal, then sealing function is achieved, but inconsistencies in filter seal surface are produced affecting its function
Solution Approach 1:
The patent replaces the traditional heat-based urethane application process with a cold pour urethane sealant system. This substitution eliminates thermal effects that cause surface inconsistencies, providing a more consistent seal surface while maintaining sealing effectiveness through the cold-cure chemistry of the urethane material.
Solution Approach 2:
The patent changes the application temperature parameter from hot (traditional heat process) to cold (cold pour process). This parameter change eliminates thermal distortion and surface inconsistencies while achieving the same sealing function through chemical curing at ambient temperatures.
2Strength
If sharp metal edges are used in screen construction, then structural strength is achieved, but damage to filter media occurs during manufacturing and use
Solution Approach 1:
The patent replaces durable but harmful metal screens with disposable plastic screen assemblies. The plastic screens provide sufficient structural strength for their service life without the sharp edges that damage filter media, and can be replaced economically when worn.
Solution Approach 2:
The patent uses composite construction combining plastic screen material with metal framing or support structures. This provides the structural strength of metal while the plastic screen surface eliminates the sharp edge damage problem, creating a hybrid solution that addresses both requirements.
3Strength
If opaque screen material is used, then structural integrity is maintained, but particle drop area is reduced compromising self-cleaning ability
Solution Approach 1:
The patent applies local quality by making the screen material transparent or translucent in the critical particle drop zones while maintaining structural integrity through appropriate material selection and support structure design. This allows particles to be visible and drop effectively through the screen.
4Loss of information
If filter identification ring is added for identification purposes, then filter identification capability is improved, but placement irregularities occur
Solution Approach 1:
The patent merges the filter identification ring with the filter housing or frame structure itself, making them integral components rather than separate parts. This integration ensures consistent placement and eliminates the manufacturing variability associated with assembling separate identification rings.
5Ease of manufacture
If traditional filter design is used, then manufacturing simplicity is maintained, but debris release efficiency is poor
Solution Approach 1:
The patent incorporates vibration mechanisms that agitate the filter media to dislodge accumulated debris. This mechanical vibration approach maintains relatively simple manufacturing while dramatically improving debris release efficiency compared to static traditional designs.
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 design enhances filter integrity, durability, and recyclability, maintaining consistent sealing and protecting the filter media from damage, while ensuring effective particle arrestment and efficient debris release, improving overall filter performance and longevity.
Implementation Method 1
a radial seal design
Implementation Method 2
latch mechanism for shock absorption
Data Source
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AI summary
An air filter includes a filter media, an end cap, a urethane outlet air seal, and a screen assembly. The end cap is secured to a first end of the filter media. The urethane outlet air seal is secured to a second, opposite end of the filter media. The screen assembly is secured to a central portion of the filter media between the first and second ends.