Electrical Conduit Fitting With Guide and Tooth Retainer
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Solution Overview
Problem
Traditional electrical conduit assembly methods using threaded joints are time-consuming and expensive.
Innovation Solution
A fitting for electrical conduits that utilizes a friction/press connection system, incorporating a guide, retainer with teeth, and a gasket to securely connect conduits without threads, ensuring alignment and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded joints are used to connect electrical conduits, then the connection is secure and reliable, but the assembly process becomes time-consuming and expensive
Solution Approach 1:
The patent removes the threading operation from the connection process entirely. Instead of using threaded joints, the invention employs a press-fit connection system where the conduit is directly pressed into the fitting body, eliminating the time-consuming threading step while maintaining connection security through the retainer mechanism
Solution Approach 2:
The connection mechanism is divided into distinct functional components: the press-fit interface for initial connection, the retainer with teeth for securing, and the gasket for sealing. This segmentation allows each component to perform its specific function efficiently, enabling quick assembly while ensuring reliable connection
2Reliability
If threaded joints are used to connect electrical conduits, then the connection is secure and reliable, but the manufacturing cost increases
Solution Approach 1:
The patent eliminates the threading process from manufacturing, which reduces both direct manufacturing costs (threading machine time, tooling) and indirect costs (labor, overhead). The press-fit connection with retainer achieves equivalent security at lower manufacturing complexity
Solution Approach 2:
The invention changes the connection parameter from threaded engagement to press-fit engagement with mechanical retention. This parameter change simplifies the manufacturing process, reducing the number of manufacturing steps and associated costs while maintaining connection reliability
3Reliability
If a retainer with teeth is used to secure the conduit, then the connection is secure against withdrawal, but the conduit may be damaged during insertion
Solution Approach 1:
The guide component performs preliminary alignment and centering of the conduit before it reaches the retainer teeth. This preliminary action ensures the conduit is properly positioned, allowing smooth insertion without the teeth catching or damaging the conduit surface
Solution Approach 2:
The retainer teeth are designed to potentially mark the conduit surface, but this minor marking serves as a beneficial indicator that the conduit is properly secured. The design accepts this minor cosmetic effect as a trade-off for achieving secure retention, converting a potential harm into a useful visual confirmation
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
Facilitates quick and cost-effective assembly of electrical conduits by eliminating the need for threading, while providing a secure and sealed connection.
Implementation Method 1
The teeth resist withdrawal of the electrical conduit immediately upon insertion of the electrical conduit into the passage at the connection section of the fitting body past the retainer
Implementation Method 2
The retainer includes teeth having sharp edges adapted to cut into the piece of electrical conduit received in the passage
Data Source
AI summary
A fitting for an electrical conduit includes a fitting body having first and second open ends, and an interior surface defining a passage adapted to receive a piece of the electrical conduit therein. The fitting body includes a connection section that is configured to receive and connect to the electrical conduit during a connection process. A retainer is in the passage at the connection section of the fitting body. The retainer includes teeth adapted to engage the piece of electrical conduit received in the passage when the electrical conduit is inserted into the connection section during the connection process. A guide is in the passage of the fitting body. The guide is configured to center the piece of electrical conduit in the fitting body before the retainer engages the electrical conduit during the connection process.