Composite Transition Fitting With Anti-Rotation Sealing
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Solution Overview
Problem
Transition fittings that connect metallic and polymeric pipes face issues such as high costs due to expensive metallic components, potential lead contamination, and increased leakage risks due to thermal expansion differences, as well as limitations in the dimensions of molded polymeric components.
Innovation Solution
A composite pipe fitting design featuring a first body with anti-rotation grooves and a second body with corresponding anti-rotation fingers, allowing for improved connection resistance and overmolding flexibility, using polymeric materials to connect metallic and polymeric conduits without metallic components, and incorporating a resilient o-ring for a fluid-tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic components (brass) are used in transition fittings, then connection strength and durability are improved, but manufacturing cost increases and lead contamination risk arises
Solution Approach 1:
The patent extracts and removes the metallic brass component from the transition fitting, replacing it entirely with polymeric materials. This eliminates lead contamination risks and reduces manufacturing costs while maintaining connection strength through the polymeric body design with integrated threading and sealing features.
Solution Approach 2:
The patent employs composite polymeric materials to replace traditional metallic components. The transition fitting body is made from polymeric material with integrated threading, eliminating the need for separate metallic parts while achieving comparable or superior performance in corrosion resistance and cost-effectiveness.
2Adaptability or versatility
If metallic and polymeric materials are combined in transition fittings, then functionality for connecting different pipe types is improved, but leakage risk increases due to thermal expansion differences
Solution Approach 1:
The patent uses homogeneous polymeric material for the entire transition fitting body, eliminating the interface between dissimilar metallic and polymeric materials. This removes the thermal expansion mismatch problem that causes leakage, while the polymeric material provides adequate adaptability for connecting both metallic and polymeric pipes through its compliance and sealing capabilities.
3Ease of manufacture
If the secondary tubular polymeric body is molded into the main body, then manufacturing simplicity is improved, but dimensional flexibility of the secondary body is limited
Solution Approach 1:
The patent segments the transition fitting into distinct components: a main body and a secondary tubular body that is overmolded onto it. This segmentation allows the secondary body to have independent dimensions and features (such as different diameters, lengths, or attachment mechanisms) while still being manufactured through a integrated overmolding process, thus achieving both manufacturing simplicity and dimensional flexibility.
Data Source
AI summary
A pipe fitting having a first body and a second body that together at least partially define a fluid flow passage. The first body defines a first portion of the fluid flow passage that extends from a first end of the fluid flow passage to a first internal opening. The second body defines a second portion of the fluid flow passage that extends from a second internal opening to a second end of the fluid flow passage. The first body has a first interface surface that surrounds the first internal opening, the first interface surface having a plurality of anti-rotation grooves. The second body has a second interface surface that surrounds the second internal opening and engages with the first interface surface. The first internal opening is in fluid communication with the second internal opening. The second interface surface has a plurality of anti-rotation fingers that are each received by and engage with a corresponding one of the anti-rotation grooves. Rotation of the second body relative to the first body is resisted by the engagement of the anti-rotation fingers with the anti-rotation grooves.