Spin-on Filter External Threads Seaming

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Solution Overview

Problem

Existing spin-on filter designs face challenges when using external threads, as the typical seaming process used with a threaded ring cannot be employed, leading to desirable improvements being necessary.

Innovation Solution

A filter arrangement that includes a housing with a filter media construction and a sleeve with mounting threads for secure attachment to a filter head, utilizing a first seal member to create a seal and prevent leaks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a threaded ring with internal threads is used, then the filter assembly can be securely attached to the filter head, but the overall amount of material increases and structural strength decreases compared to external threads

Engineering Contradiction:

Improvestructural strengthVSAvoidamount of material

Core Design Contradiction:

StrengthVSQuantity of substance

Solution Approach 1:

The patent inverts the traditional threaded ring design by using external threads instead of internal threads. The threaded ring is configured with external threads that engage with internal threads in the filter head, reversing the conventional approach and reducing material usage while maintaining attachment strength.

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of manufacture

If external threads are used on the threaded ring, then material usage is reduced and structural strength is improved, but the typical seaming process cannot be used

Engineering Contradiction:

Improvemanufacturing process compatibilityVSAvoidamount of material

Core Design Contradiction:

Ease of manufactureVSQuantity of substance

Solution Approach 1:

The patent segments the filter assembly into distinct components: a filter element, a threaded ring with external threads, and a filter head with internal threads. This segmentation allows each component to be manufactured separately using appropriate processes, with the threaded ring and filter head assembled together, enabling external threading while maintaining manufacturing feasibility.

Inventive Principle:

Principle #1Segmentation

3Adaptability or versatility

If a thread plate with flow passages is used, then flow can be allowed in and out of the filter assembly, but the design is less structurally strong and uses more material

Engineering Contradiction:

Improveflow passage functionalityVSAvoidstructural strength

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The patent merges the flow passage function with the threaded ring structure. The threaded ring incorporates flow passages that allow fluid to pass through while maintaining the structural integrity provided by the threaded design. This combination eliminates the need for a separate thread plate and integrates multiple functions into a single robust component.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250135383A1Spin-on filter with external threads and methods

Publication Date: 2025.05.01 DONALDSON CO INC

AI summary

A filter arrangement for securing to a filter head includes a housing having a surrounding wall defining an interior volume; an open mouth providing access to the interior volume, and an end opposite of the open mouth. Filter media is within the interior volume. A ring is secured to the wall adjacent to the mouth. An exterior of the ring has mounting threads to mount with the filter head when the filter arrangement is secured to the filter head. A first seal member is against the ring to create a seal with the filter head, when the filter arrangement is secured to the head. A seam is over an end portion of the ring to axially secure the ring to the housing. A groove is within the ring and facing outward holding a second seal member. A seal is formed between and against the seam and the second seal member.