Barb Arm Support for Cable Duct Pullout Resistance
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Solution Overview
Problem
Existing cable duct systems face limitations in resisting tensile pullout forces, as previous barb assemblies are not effective in preventing unintended disassembly, particularly under significant pullout forces.
Innovation Solution
A barb assembly with a barb arm support structure that decreases the moment arm of the tensile pullout force, allowing the barb to engage more effectively with the cable duct section and increase its resistance to removal, by changing the point of action for the pullout force and distributing the force across multiple barb arms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional barb assembly is used to engage cable duct sections, then the structure is simple and ease of manufacture is improved, but the resistance to tensile pullout forces is insufficient
Solution Approach 1:
The patent introduces a support structure that adds a dimensional element to the barb assembly, positioning the barb at an optimized angle and depth within the cable duct section. This dimensional adjustment increases the moment arm and distributes pullout forces across multiple engagement points, significantly enhancing resistance to tensile forces while maintaining reasonable structural complexity
Solution Approach 2:
The barb assembly is pre-configured with a support structure that positions the barb arms at optimal angles and depths before engagement. This preliminary positioning ensures that when pullout forces are applied, the forces are already distributed across multiple engagement points, maximizing resistance from the outset rather than relying on the barb alone
2Strength
If the barb arm length is increased to improve engagement, then the resistance to pullout force is improved, but the moment arm of the tensile pullout force increases which reduces effectiveness
Solution Approach 1:
The support structure acts as an intermediary element between the barb and the cable duct section. It provides a stable base that allows the barb to engage at an optimized depth and angle, effectively mediating the interaction between the barb and the duct section to maximize engagement while minimizing the moment arm effect
Solution Approach 2:
The patent optimizes the geometric parameters of the barb assembly, including the angle of the barb arms, the depth of engagement, and the position of the support structure. By carefully selecting these parameters, the design achieves maximum resistance to pullout forces while keeping the moment arm as short as possible
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 barb assembly significantly enhances the resistance to tensile pullout forces, reducing the risk of barb failure and ensuring secure engagement of cable duct sections within the system, thereby preventing unintended disassembly.
Implementation Method 1
A barb assembly with a barb arm support structure that decreases the moment arm of the tensile pullout force, allowing the barb to engage more effectively with the cable duct section and increase its resistance to removal
Implementation Method 2
distributing the force across multiple barb arms
Data Source
AI summary
The embodiments provide a barb assembly for use with a cable duct component to oppose removal of a cable duct section from the cable duct component. The barb assembly and/or cable duct component can comprise one or more barb arm supports, which can increase the ability of the barb assembly to oppose removal of the cable duct section from the cable duct component. The embodiments also provide methods of installing cable duct components and systems with the above-described features.