Disposable Optical Fiber Cleaver Using Flexible Abrasive Cartridge
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Solution Overview
Problem
Conventional optical fiber cleavers are expensive, require precise maintenance, and produce inconsistent cleaves due to the use of rigid blades, making them unsuitable for field installations where a low-cost, disposable solution with consistent results is needed.
Innovation Solution
A bladeless optical fiber cleaving device that bends the fiber over a radiused mandrel and uses flexible abrasive material to create a flaw, applying static or dynamic tension to ensure consistent cleaves with reduced mechanical complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rigid blades are used in conventional cleavers, then cleaving function is achieved, but device cost and maintenance requirements increase significantly
Solution Approach 1:
The patent employs disposable abrasive cartridges containing flexible abrasive elements that can be easily replaced. This eliminates the need for expensive, precision-machined rigid blades while maintaining consistent cleave quality. The flexible abrasive material is designed to be consumed and replaced rather than maintained, reducing both initial device cost and ongoing maintenance requirements.
Solution Approach 2:
The patent changes the physical state and properties of the cutting element from rigid (carbide blades) to flexible (abrasive material on compliant substrate). This parameter change allows the cutting element to conform to fiber variations, maintaining cleave consistency while reducing manufacturing complexity and cost.
2Device complexity
If rigid carbide blades are used, then cleaving capability is provided, but mechanical complexity and tolerance control requirements increase
Solution Approach 1:
The patent uses flexible abrasive elements mounted on a compliant substrate rather than rigid carbide blades. This flexibility allows the cutting element to adapt to minor variations in fiber positioning and geometry, eliminating the need for tight mechanical tolerances and complex alignment mechanisms while maintaining consistent cleave quality.
Solution Approach 2:
Instead of using a rigid blade that requires precise positioning and tolerance control, the patent inverts the approach by using a flexible abrasive element that conforms to the fiber. This inversion eliminates the need for precision mechanical components and complex tolerance control systems.
3Object-affected harmful factors
If rigid blades are used in conventional cleavers, then fiber cleaving is achieved, but risk of fiber damage increases due to impact force and deep flaws
Solution Approach 1:
The patent replaces the high-impact mechanical blade cutting system with a lower-force abrasive grinding system. The flexible abrasive material gradually removes material to create a flaw rather than impacting the fiber with high force, significantly reducing the risk of fiber damage while maintaining operational simplicity through automated cartridge actuation.
Solution Approach 2:
The flexible abrasive element acts as a cushioning intermediary between the actuation mechanism and the optical fiber. This flexible element absorbs and distributes forces, preventing sudden impacts that could damage the fiber while still effectively creating the necessary flaw for cleaving.
4Reliability
If conventional portable cleavers are designed with precision mechanisms, then cleaving function is achieved, but device cost increases
Solution Approach 1:
The patent segments the cleaver into a permanent housing and disposable cartridges. This segmentation allows the expensive precision mechanisms to be minimized in the housing while the consumable cartridges contain the flexible abrasive elements. This approach maintains reliable, consistent cleaves through precise cartridge design while reducing overall device cost by eliminating the need for expensive, maintainable precision components throughout the entire device.
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 device reliably produces consistent 90° ± 3° cleaves at a lower cost than conventional cleavers, eliminating the need for precise maintenance and making it suitable for field operations.
Implementation Method 1
The flexible tongue is further configured to provide an arcuate surface to bend a portion of the optical fiber... The abrasive medium carrier is configured to be actuated to place the abrasive medium in contact with the portion of the optical fiber to create a flaw in the portion of the optical fiber
Implementation Method 2
Positioning the optical fiber over the mandrel exerts bending forces on the optical fiber such that a top surface of the optical fiber is under tension and a bottom surface of the optical fiber is in compression
Implementation Method 3
The first and second fiber tensioners exert a downward force on the top surface of the optical fiber on either side of the mandrel resulting in a static axial tension within the optical fiber
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
According to an exemplary embodiment of the present invention, a device (100) to cleave an optical fiber (50) is provided. The device includes a base (110) and a cover (130) that is rotatably connected to the base. The base (100) has a work surface and a mandrel (120) disposed in the base and extending above the work surface. An optical fiber (50) can be bent over a radiused surface of the mandrel (120) and tensioned prior to cleaving. A shuttle (140) is disposed in the cover (130) over the mandrel (120), wherein the shuttle includes a flexible abrasive material that is configured to contact the optical fiber and create a flaw on a top surface of the optical fiber to initiate a crack in the optical fiber.