Buoyant Foam Knot-Tying Device with Swivel Disc
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Solution Overview
Problem
Fly fishing knot-tying devices are difficult to use, especially in cold weather, and existing solutions require multiple movable parts, are not buoyant, and lack a slim design for easy portability and manipulation.
Innovation Solution
A knot-tying device with a simple design made of PVC pre-expanded foam, featuring a swivel-disc with a bifurcated slot and metallic coils or leaf springs for easy manipulation, allowing for the creation of blood and barrel knots with minimal user effort and without sinking in water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If prior knot-tying devices are used, then knot-tying function is provided, but device complexity increases with multiple movable parts requiring complicated manipulation
Solution Approach 1:
The patent combines multiple knot-tying functions (blood knot, barrel knot, and other fishing knots) into a single integrated device with a unified body and rotating component. This merging eliminates the need for multiple separate tools or complex adjustable parts, providing a simple yet versatile solution that is easy to manipulate while delivering multiple knot-tying capabilities through a single device structure.
2Ease of operation
If traditional knot-tying devices are used, then knot-tying capability is provided, but portability is reduced due to bulky size and weight
Solution Approach 1:
The patent employs a simple, lightweight construction using materials that minimize weight while maintaining functionality. The device is designed as a compact, single-piece or minimally assembled tool that can be easily carried in a fishing tackle box or even a pocket, eliminating the need for heavy-duty materials or complex mechanisms that would increase weight.
3Reliability
If prior devices are used, then knot-tying function is provided, but durability is reduced when parts are susceptible to loss or disassembly
Solution Approach 1:
The patent integrates all essential knot-tying components into a single unified device structure, eliminating separate movable parts that could be lost or disassembled. The rotating component and body are designed to work together as an integrated system, reducing the risk of part loss while maintaining full functionality for various knot-tying operations.
4Productivity
If conventional knot-tying methods are used, then knot joining is achieved, but time consumption increases due to difficulty in tying
Solution Approach 1:
The patent incorporates pre-positioned guides, slots, or alignment features in the device body that automatically position the fishing line and leader in the correct configuration for knot-tying. This preliminary positioning eliminates the need for manual alignment and complex hand movements, allowing users to quickly form knots by simply rotating the component and pulling the line, significantly reducing tying time.
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 allows for quick and easy tying of knots with limited dexterity, is lightweight, durable, and buoyant, making it suitable for fishing conditions and easy to store and transport.
Implementation Method 1
a swivel disc (20) cut from said card body and adapted to pivot perpendicularly transverse to the card body plane, with an edge along its circumference for receiving a springing mechanism means (22) for maintaining the swivel disc (20) in pivotal and rotating cooperation with the card body (11)
Data Source
AI summary
A knot-tying device with a rectangular card body made of rigid, buoyant material, including a retaining means for entraining separate leader lines in crossing diagonal relation, and a swivel disc cut from said card body, adapted to pivot in the card body. The swivel disc contains a bifurcated slot having closed ends extending to a single open end, receiving separate leader lines, for easy manipulation by fishermen with limited dexterity. The device is not costly to manufacture, small and easily stored, with few movable parts and withstands vigorous use. The operator swivels the disc, entrains the tag ends of the leader lines as well as the remaining lines in the card body, and the lines in the swivel disc slots. The operator rotates the swivel disc, forming the knot, then threads the tag ends through the gap in the knot, completing the knot-tying process.