Helical Furcation Plug for Fiber Cable Tensile Load Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pass-through furcation designs for fiber optic cables fail to effectively transfer tensile loads to the internal strength elements of subunits, leading to potential damage during cable pulling operations due to reliance on the external cable jacket, which lacks sufficient strength.
Innovation Solution
A fiber optic cable assembly with a furcation plug featuring helically wrapped subunits around its grooves, allowing tensile loads to be transferred through internal strength members by wrapping the subunits in a prescribed helical path about the furcation plug.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an epoxy plug is applied to the outer cable jacket of each subunit in a pass-through furcation, then the subunits are secured at the furcation point, but the tensile loads cannot be transferred to the internal strength elements because the adhesive only contacts the outer jacket
Solution Approach 1:
The furcation plug features a helical groove pattern that wraps around the plug in a curved, three-dimensional path. This helical geometry allows the subunit to be routed through the plug while maintaining contact along a curved surface, enabling tensile load transfer without requiring direct access to the internal strength elements. The curved path distributes forces effectively along the length of the plug.
Solution Approach 2:
The furcation plug acts as an intermediary component between the subunit cable jacket and the internal strength elements. Instead of requiring direct bonding to the strength elements, the plug provides a mechanical interface that transfers tensile loads from the cable jacket through the helical groove configuration to the internal strength elements indirectly, solving the accessibility problem.
2Strength
If the external cable jacket of each subunit bears the tensile loads in a pass-through furcation, then the subunit structure is simplified, but the cable jacket lacks sufficient strength to withstand significant pulling loads
Solution Approach 1:
The helical groove pattern creates a curved, three-dimensional load path that distributes tensile forces along the length of the furcation plug. This curved geometry transforms the simple linear load-bearing structure into a more complex but stronger configuration, allowing the assembly to withstand significant pulling loads while maintaining a relatively simple overall structure.
Solution Approach 2:
The furcation plug combines multiple functional elements into a single composite structure: the helical grooves provide mechanical engagement, the plug body provides structural support and force distribution, and the overall assembly creates a composite system that achieves high tensile strength without requiring complex multi-component assemblies.
3Reliability
If conventional furcation designs encapsulate internal strength elements within an epoxy plug, then tensile loads are effectively transferred, but accessing the strength elements for pass-through configurations is difficult and risks damaging optical fibers
Solution Approach 1:
The helical groove pattern provides a curved, guided path for routing the subunit through the furcation plug. This curved geometry naturally guides the subunit along a safe path that avoids direct exposure to sharp edges or stress concentration points, reducing the risk of fiber damage while maintaining easy operability for installation personnel.
Solution Approach 2:
The furcation plug serves as a protective intermediary that shields the internal strength elements and optical fibers during the pass-through operation. The helical groove structure provides a controlled interface that allows routing operations to proceed easily while the plug itself protects the vulnerable internal components from damage.
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 solution ensures even distribution of tensile forces across subunits, preventing damage to optical fibers and maintaining signal integrity by transferring loads through the internal strength elements rather than the external cable jacket.
Implementation Method 1
The internal strength elements of each cable (both input and output) are accessed and encapsulated within the adhesive of the epoxy plug. This bonding of strength elements allows tensile loads to transfer along the strength elements from one cable to the other
Implementation Method 2
The furcation assembly includes a furcation plug that extends longitudinally a length between a first end and an opposite second end. The furcation plug includes a plurality of grooves that extend helically about a periphery of the furcation plug between the first end and the second end. Each of the plurality of grooves receives a respective one of the plurality of subunits such that each of the plurality of subunits is wrapped around the furcation plug at least one time.
Data Source
AI summary
A fiber optic cable assembly is provided. The fiber optic cable assembly includes a fiber optic cable with an outer jacket that surrounds a plurality of subunits each containing at least one optical fiber. The outer jacket includes an end through which the plurality of subunits extends. The fiber optic cable assembly includes a furcation assembly proximate the end of the outer jacket through which the plurality of subunits extends. The furcation assembly includes a furcation plug that extends longitudinally a length between a first end and an opposite second end, The furcation plug includes a plurality of grooves that extend helically about a periphery of the furcation plug between the first end and the second end. Each of the plurality of grooves receives a respective one of the plurality of subunits such that each of the plurality of subunits is wrapped around the furcation plug at least one time.