Push-Lock Pipe Coupling With Interference Fit
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Solution Overview
Problem
Existing pipe connection methods, such as gluing, welding, and threading, are cumbersome, time-consuming, and often unable to withstand high tensile forces or allow for easy disconnection without damage, and are limited by the material type of the pipes.
Innovation Solution
A push-lock pipe coupling system that allows for quick connection and disconnection of pipes regardless of material, using a female end with interior circumferential grooves and rigid fingers, and a male end with exterior grooves, creating a secure interference fit without the need for gluing, welding, or threading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional connection methods (gluing, welding, threading) are used, then connection strength can be achieved, but the connection process becomes time-consuming and cumbersome
Solution Approach 1:
The coupling device is segmented into distinct functional components: a body portion with interior grooves and exterior ridges, and a separate locking mechanism with fingers that engage with the ridges. This segmentation allows the connection to be formed through a simple push motion rather than requiring time-consuming traditional connection processes.
Solution Approach 2:
The coupling body is pre-formed with interior grooves and exterior ridges during manufacturing, and the locking fingers are pre-positioned to engage with these features. This preliminary preparation eliminates the need for on-site threading, gluing, or welding operations.
2Ease of operation
If traditional connection methods are used, then connection can be formed, but disconnection requires destruction or specialized tools
Solution Approach 1:
The locking fingers are designed to be movable rather than fixed, allowing them to flex outward during insertion and then lock into place on the exterior ridges. For disconnection, the fingers can be manually or mechanically actuated to release the lock, enabling tool-free or simple-tool disconnection without destruction.
Solution Approach 2:
The coupling system allows for easy disconnection and reuse of the coupling device and pipe sections. The locking mechanism can be released and reset, enabling the same components to be disconnected and reconnected multiple times without degradation or destruction.
3Strength
If threaded connections are used, then pipes can be disconnected and reused, but the connection cannot withstand high tensile forces
Solution Approach 1:
The coupling system combines multiple structural features into a composite connection mechanism: the interference fit between the coupling body and pipe, the engagement of locking fingers with exterior ridges, and the geometric interlocking of grooves and ridges. This composite approach achieves both high tensile strength and ease of disconnection.
Solution Approach 2:
The invention merges the advantages of threaded connections (reusability) with the advantages of rigid connections (high tensile strength) by combining a push-fit insertion mechanism with a positive locking feature. The result is a connection that is both strong and easily reversible.
4Strength
If gluing or cementing is used, then permanent joining is achieved, but the process is cumbersome and time-consuming
Solution Approach 1:
The invention replaces chemical bonding mechanisms (glue, cement) with a purely mechanical locking system. The connection is formed through the mechanical engagement of locking fingers with exterior ridges and the interference fit of the coupling body with the pipe, eliminating the need for adhesive application and curing time.
5Adaptability or versatility
If welded connections are used, then high tensile force resistance is achieved, but the process is time-consuming and limited to metal pipes
Solution Approach 1:
The coupling device is designed with universal applicability to work with pipes of different materials (metal, plastic, composite) through its material-independent mechanical locking mechanism. The coupling body and locking fingers create a secure connection through geometric interlocking rather than material-specific bonding, enabling use across diverse pipe types.
Data Source
AI summary
A pipe coupling for connecting adjacent pipes. The pipe coupling has a connection type at each end that may be male or female. A female end may have an interior surface defining a receiving chamber. An interior circumferential groove is formed in the interior surface in which a band is seated. A plurality of rigid fingers is extends from the band into the receiving chamber. The receiving chamber receives a male end of an adjacent pipe, the male end having an exterior surface. An exterior circumferential groove is defined on the exterior surface to receive the plurality of rigid fingers. A variety of connection types and combinations are possible. The female end may define a sight window to permit viewing of the position of a male end of an adjacent pipe. The receiving chamber may have a reduced diameter proximate to the middle of the coupling to improve sealing.