Push-Fit Piping Joint Assembly with Threaded Retaining Cap
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Solution Overview
Problem
Existing piping systems lack the ability to repair and reuse fittings and valves, especially when connecting unlike materials such as copper, CPVC, or stainless steel, and require labor-intensive soldering or push-fit methods that are not versatile for adapting to changes in pipe direction.
Innovation Solution
A push-fit piping joint assembly system using a threaded retaining cap and a removal tool that allows for the disassembly of fittings and valves without tools, clamps, or solder, enabling the reuse of fittings and connecting both like and unlike materials with a leak-free seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If soldering is used to connect pipe fittings, then the connection strength is improved, but the labor intensity and time consumption increase significantly
Solution Approach 1:
The patent replaces the thermal soldering process with a mechanical push-fit connection system. The fitting includes an expansion element that mechanically expands to grip the pipe internally, and a retention element that locks the assembly in place, eliminating the need for heat, flux, and solder while achieving both strong connections and rapid installation
Solution Approach 2:
The fitting is divided into distinct functional components: an outer fitting body, an expansion element (collar), a retention element (ring with teeth), and a seal element. This segmentation allows each component to perform its specific function independently - the expansion element provides grip, the retention element prevents disconnection, and the seal element prevents leakage - while enabling tool-free assembly and disassembly for repair and reuse
2Productivity
If traditional push-fit fittings are used, then the installation speed is improved, but the ability to repair and reuse fittings is lost
Solution Approach 1:
The patent employs dynamic elements that can be activated in both directions: the retention element can be engaged by simply pushing the pipe into the fitting for rapid installation, and disengaged by pulling a release tab or rotating the fitting for easy removal. This dynamic design maintains the speed advantage of push-fit while adding repairability and reusability
Solution Approach 2:
The expansion element acts as an intermediary between the pipe and the retention element. It expands to grip the pipe internally, providing a mechanical anchor that allows the retention element to lock the assembly. This intermediary mechanism enables both rapid engagement and controlled disengagement, facilitating repair and reuse while maintaining installation speed
3Reliability
If soldering is used to connect unlike materials (copper, CPVC, stainless steel), then the connection reliability is improved, but the complexity of materials and processes increases
Solution Approach 1:
The patent designs a universal fitting system that can connect different pipe materials (copper, CPVC, stainless steel, PEX) using the same mechanical engagement mechanism. The fitting's internal expansion element and external retention element create a material-independent connection, eliminating the need for different soldering techniques for different material combinations while maintaining reliable connections
Data Source
AI summary
A piping joint assembly and fastening ring removal tool allow re-use and repair of push-fit piping fittings and valves without damage to the fitting or valve elements or the pipe. The quick connection pipe fitting assembly package of the present invention employs a threaded retaining cap that when removed, exposes the clamping, sealing and fastening mechanism of the fitting or valve. In one embodiment, the present invention further includes a removable packing gland mounted on a body about an axis of an orifice. The present invention facilitates re-use of existing fittings and valves by allowing the internal components to be removed, repaired and/or replaced.