Furcation Tube Molded Array for Fiber Tensile Load Management
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Solution Overview
Problem
Conventional methods for furcating fiber optic cables, such as using heat-shrink tubing and epoxy, often damage the fragile optic fibers during installation due to direct transmission of pulling forces, and existing solutions can be bulky and labor-intensive.
Innovation Solution
A fiber optic cable furcation assembly with a molded array of furcation tubes, where reinforcing filaments are bonded into the tube jackets, allowing the optic fibers to be slidably retained without bonding, and a crimp ring is used to secure the trunkline, limiting tensile loads on the fibers during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If epoxy is used to rigidly bind optic fibers to the cable jacket, then the furcation unit is securely assembled, but pulling forces during installation are transmitted directly to the optic fibers causing damage
Solution Approach 1:
The invention segments the force transmission path by introducing a furcation unit that acts as an independent component between the cable jacket and optic fibers. This segmentation allows the assembly to be stabilized through the furcation unit structure while preventing force transmission to the fibers, as the fibers are not rigidly bound to the jacket through epoxy.
Solution Approach 2:
The furcation unit serves as an intermediary component between the cable jacket and the optic fibers. It provides a mechanical interface that secures the assembly structure while decoupling the tensile force path, allowing the jacket to be pulled without transmitting forces to the fragile optic fibers.
2Reliability
If conventional heat-shrink tubing and epoxy methods are used for furcation, then the assembly is secure, but the process becomes labor-intensive and bulky
Solution Approach 1:
The invention merges multiple functions into the furcation unit component: it provides structural support, secures the optic fibers through friction fit, and prevents force transmission. This consolidation eliminates the need for separate epoxy application and heat-shrink tubing steps, reducing labor intensity while maintaining assembly security.
Solution Approach 2:
The invention extracts and eliminates the epoxy binding step from the traditional furcation process. By using a furcation unit that secures fibers through mechanical friction fit rather than chemical bonding, the complex multi-step epoxy process is replaced with a simpler, more efficient assembly method.
3Stability of the object's composition
If optic fibers are rigidly bound to the cable jacket, then the furcation unit is stable, but the fibers are vulnerable to damage during handling and installation
Solution Approach 1:
The invention segments the structural connection from the fiber connection. The furcation unit provides structural stability for the assembly while the fibers are independently routed through the unit without rigid binding, creating separate functional zones that maintain both stability and fiber strength.
Solution Approach 2:
The furcation unit employs a flexible tube structure that allows optic fibers to move independently within it. This flexible containment provides stability to the overall assembly while allowing the fibers to slide freely, preventing tensile forces from being transmitted to the fragile fiber cores.
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 effectively reduces the risk of damaging optic fibers by distributing tensile forces and is more compact and less labor-intensive than prior art methods, ensuring the fibers remain undamaged during handling and installation processes.
Implementation Method 1
heating the rearward portions of the array to deform at least a portion of each of the furcation tubes to form a molded portion of the array
Implementation Method 2
heating the rearward portions of the array to deform at least a portion of each of the furcation tubes
Implementation Method 3
an external surface of the molded portion can be directly attached to the housing by an adhesive (e.g., glue)
Implementation Method 4
a crimp ring that crimps at least a plurality of reinforcing filaments of the trunkline against the neck of the housing
Data Source
AI summary
Methods and apparatus for furcating fiber optic cables are provided. In some embodiments, a molded array of furcation tubes is generated by compressing rearward portions of a plurality of furcation tubes together and heating at least a portion of the rearward portions to form a molded portion of the molded array. Reinforcing filaments can be bonded into and/or throughout the molded portion. The molded portion can have a plurality of internal chambers, each in communication with a separate furcation tube of the molded array, in which optic fibers can be slidably retained. The molded portion can be fixedly coupled to a housing, which in turn, can be coupled to a cable trunkline. Optic fibers can slide longitudinally within the trunkline, housing, and molded portion.