Angled-Thread Filter Housing for Faster, Stronger Assembly
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Solution Overview
Problem
Existing liquid filter arrangements, such as spin-on and bowl/cartridge types, face challenges in efficient and cost-effective servicing due to conventional thread designs that require multiple rotations and can lead to connection issues.
Innovation Solution
A filter housing with an angled threaded section, angled at least 1 degree relative to the longitudinal axis, facilitates easy installation and enhanced burst strength, allowing for a stronger connection with the filter head using fewer rotations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional threaded section is used, then the housing can be securely attached to the filter head, but multiple rotations are required and connection issues may occur
Solution Approach 1:
The threaded section is angled relative to the longitudinal axis of the housing, changing the geometric parameters of the thread configuration. This angular orientation allows the threads to engage more effectively with the filter head, reducing the number of rotations needed for secure attachment and minimizing connection issues during installation
2Strength
If a conventional threaded section is used, then the housing can be attached to the filter head, but the connection strength and burst resistance are limited
Solution Approach 1:
By angling the threaded section relative to the longitudinal axis, the load distribution across the threads is optimized. This parameter change enhances the connection strength and burst resistance of the housing without significantly increasing the overall complexity of the threaded section design
3Strength
If the housing wall thickness is increased to improve strength, then the burst strength increases, but the housing becomes more expensive and heavier
Solution Approach 1:
The angled threaded section redistributes the mechanical loads more efficiently, allowing the housing to achieve required burst strength with reduced wall thickness. This parameter change in the thread geometry enables weight reduction while maintaining or improving structural integrity
Solution Approach 2:
The threaded section is pre-configured with an optimal angle during manufacturing, creating a built-in mechanical advantage that enhances load-bearing capacity before the housing is subjected to operational stresses. This preliminary geometric configuration compensates for reduced material thickness
Data Source
Figure 1
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AI summary
A filter housing having a tapered or angled threaded section / interface with a filter head. The angled threaded section allows for easy installation and thread engagement before a seal is created with the filter head.