Double Vented Transition Elbow for Copper-to-PEX Plumbing Systems

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Solution Overview

Problem

Traditional plumbing elbows lack the ability to transition between copper piping and PEX tubing and do not accommodate vent ports from both sides, limiting their versatility in fluid systems like hot water heating systems.

Innovation Solution

A double vented plumbing elbow with a 90° angle body, featuring two vent ports in the same plane, one for copper pipe connection and another for PEX tube connection, allowing for fluid communication and venting capabilities in various orientations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a traditional single vent port elbow is used, then the structure is simple, but it cannot accommodate vent ports from both sides and cannot transition between different pipe types

Engineering Contradiction:

Improvevent port accommodation capabilityVSAvoidelbow structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The elbow fitting is designed with dual functionality: it provides both copper pipe connection (via threaded fitting) and PEX tube connection (via barbed fitting), allowing it to serve as a transition fitting between different pipe types while also accommodating vent ports from either side

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The elbow body is segmented into distinct connection zones: one end with copper pipe threading and another end with PEX barbs, allowing each side to be optimized for its specific pipe type while maintaining a unified elbow structure

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If a traditional elbow fitting is used, then the design is simple, but it lacks transition capability between copper and PEX tubing

Engineering Contradiction:

Improvepipe type transition capabilityVSAvoidfitting design complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The fitting integrates multiple connection types (copper threading and PEX barbs) into a single elbow component, enabling transition between different pipe materials without requiring additional adapter fittings

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The copper fitting and PEX fitting are merged into a single integrated elbow body, combining what would traditionally require separate components into one unified fitting that provides both transition and elbow functionality

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If only one vent port is provided, then the manufacturing is simpler, but it cannot provide effective venting in all orientations

Engineering Contradiction:

Improveventing effectivenessVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The second vent port is positioned at approximately 90 degrees to the first vent port, creating a three-dimensional venting configuration that allows effective venting regardless of the elbow's installation orientation

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS11421810B2Double vented transition elbow

Publication Date: 2022.08.23 NIBCO INC

AI summary

A double vented transition elbow can be used when venting a variety of applications, such as for baseboard heaters and hot water heating systems. The double vented elbow allows venting in one orientation or in a different orientation when the elbow is rotated. One end of the elbow couples to copper tubing, while the other end of the elbow couples to PEX tubing. Thus, the elbow not only allows for venting in two different orientations, it also allows for the transition from copper to PEX tubing within the same fitting.