Barbed Fitting Geometry and Insertion Tool Design
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Solution Overview
Problem
Conventional barbed fittings for irrigation systems require high insertion force and lack effective tools for easy installation, especially in slippery conditions, due to their design and the need for non-coaxial operator alignment, making the process difficult and awkward.
Innovation Solution
Designing barbed fittings with smaller outer barb diameters and reduced barb tapers, along with a barbed fitting insertion tool featuring a syringe-like configuration and ergonomic handle, allowing coaxial alignment and easy gripping to reduce insertion force and facilitate installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional barbed fittings with larger outer barb diameters and greater barb tapers are used, then extraction force is improved, but insertion force increases significantly
Solution Approach 1:
The patent applies parameter changes by reducing the outer barb diameter from conventional sizes (e.g., 0.680 inches) to smaller dimensions (e.g., 0.630 inches or less), and by reducing the barb taper angle from conventional angles (e.g., 24 degrees) to smaller angles (e.g., 14 degrees or less). These parameter modifications directly reduce the insertion force required while maintaining acceptable extraction forces through the optimized geometry.
2Quantity of substance
If conventional fittings with small gripping surface area are used, then material usage is reduced, but ease of operation deteriorates
Solution Approach 1:
The patent introduces alignment flanges that extend radially outward from the fitting body, adding a dimensional element perpendicular to the insertion direction. These flanges provide large gripping surfaces for operator hands or tools, significantly improving ease of operation without substantially increasing the amount of material used, as the flanges are thin-walled structures.
3Device complexity
If conventional insertion tools with offset operator action are used, then tool design is simplified, but ease of operation worsens due to non-coaxial alignment requirements
Solution Approach 1:
The patent designs a universal insertion tool with a receptacle that can accommodate various fitting types (straight couplings, elbows, tees, adapters) by receiving their alignment flanges. The tool provides coaxial operator action for all fitting types, eliminating the need for different tools for different fittings and improving ease of operation through consistent, intuitive pushing motion aligned with the insertion direction.
Data Source
AI summary
Barbed fittings having elongated bodies defining open ends and an internal fluid carrying passage interconnecting the ends are disclosed herein, with at least one end having a barb with a reduced outer diameter and/or taper angle to reduce the amount of insertion force necessary to install the fittings, thereby making the fittings easier to insert in conduit and/or other fluid carrying components. To also make the fittings easier to install, a barbed fitting insertion tool is disclosed having a body defining a fitting receptacle in a front portion of the body and a handle portion in the rear portion of the body for gripping and inserting fittings located in the fitting receptacle into conduit. The fitting receptacle having a locking mechanism for securing the fittings to the tool and preventing unintentional removal of same from the tool.