Compression Ferrule Tube Fitting for Leak-Proof Plumbing Joints
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Solution Overview
Problem
Existing methods for connecting tubes in plumbing, such as welding, require expertise, are time-consuming, and pose safety risks, making them inefficient and costly.
Innovation Solution
A connection apparatus using compression nuts, a sleeve fitting body, and ferrules to securely join tubes without the need for welding, ensuring a leak-proof and cost-effective solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding is used to connect tubes, then the joint strength is improved, but the complexity of operation and safety risks increase
Solution Approach 1:
The patent replaces the welding process (thermal/mechanical system requiring expertise) with a compression-based mechanical system. The compression nut and ferrule assembly creates a secure mechanical connection through radial compression forces, eliminating the need for welding skills, equipment, and safety precautions while maintaining joint integrity.
Solution Approach 2:
The patent introduces intermediate components (ferrule and compression nut) that mediate the connection between tubes. The ferrule distributes compression forces and creates sealing contact, while the compression nut provides adjustable radial compression, together forming an intermediary mechanical connection system that achieves strong joints without welding.
2Strength
If welding is used to connect tubes, then the joint strength is improved, but the time required and cost increase
Solution Approach 1:
The compression nut and ferrule assembly are pre-configured in a disassembled state, allowing the tube to be inserted first. The compression components are then simply tightened to complete the connection, eliminating the multi-step welding process including preparation, heating, cooling, and inspection, thereby significantly reducing connection time while maintaining joint strength.
3Strength
If welding is used to connect tubes, then the joint strength is improved, but the safety risks increase
Solution Approach 1:
The patent replaces the welding process (which involves fire, heat, and electrical hazards) with a pure mechanical compression system. The compression nut applies radial force through the ferrule to create secure joints, completely eliminating fire risks, thermal damage risks, and electrical hazards associated with welding while maintaining equivalent or superior joint strength.
4Manufacturing precision
If expert supervision is required for tube connection, then the joint quality is improved, but the device complexity increases
Solution Approach 1:
The compression connection system is designed to be self-adjusting and self-regulating. As the compression nut is tightened, the ferrule automatically distributes the compression forces evenly around the tube, and the system self-regulates the compression level based on the mechanical properties of the components. This eliminates the need for expert supervision while ensuring consistent, high-quality joints through inherent mechanical feedback.
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 apparatus provides a simple, time-saving, and cost-effective method for connecting tubes, eliminating the need for expert supervision and ensuring secure, leak-proof joints without the risks associated with welding.
Implementation Method 1
a first compression nut having a first narrow portion and a first threaded portion, the first narrow portion having a first internal cavity with a first diameter
Implementation Method 2
The tube 106 is securely connected to the tubular arm 104 using a joining or fusion technique such as welding 108
Data Source
AI summary
A device for making plumbing connections is provided. The device includes a first compression nut, a second compression nut, a sleeve fitting body between the first compression nut and the second compression nut, a first ferrule between the first compression nut and the sleeve fitting body, and a second ferrule between the sleeve fitting body and the second compression nut. The first compression nut has a first narrow portion and a first threaded portion, the first narrow portion having a first internal cavity with a first diameter. The second compression nut has a second narrow portion and a second threaded portion, the second narrow portion having a second internal cavity with a second diameter. The sleeve fitting body has a threaded portion that respectively correspond to the first and second threaded portions, and a first cavity portion having the first diameter, and a second cavity portion having the second diameter.