Dual-Line Cast Net Retrieval for Underwater Snag Release
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Solution Overview
Problem
Traditional methods for retrieving snagged cast nets often require users to enter the water, posing safety hazards and risking line or net damage, especially when the net is caught on underwater obstructions.
Innovation Solution
A dual line cast net retrieving device with a hand line, horn line, and couplers or a horn hook mechanism that allows users to exert an uplifting force on the central horn of the net, alleviating tension in the braille lines and facilitating retrieval without entering the water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If users pull harder on the hand line to retrieve a snagged net, then the net can be freed from minor snags, but it leads to hand line breakage, braille line breakage, or damage to the net itself
Solution Approach 1:
The retrieval system is divided into two independent lines: the hand line for initial retrieval and the horn line for applying uplifting force. This segmentation allows the hand line to be protected from excessive tension while the horn line handles the force application, preventing breakage of either line or net components.
Solution Approach 2:
The horn line acts as an intermediary between the user and the net, providing a controlled lifting mechanism through the couplers. This intermediary system distributes force more evenly across the net structure, preventing localized stress that could cause breakage.
2Ease of operation
If users wade or swim into the water to free the net, then the net can be freed from underwater obstructions, but it is inconvenient, time-consuming, and dangerous depending on water conditions
Solution Approach 1:
The dual line system enables the net to essentially free itself from underwater obstructions through the coordinated action of the hand line and horn line. The uplifting force applied through the horn line and couplers allows the net to lift and disengage from snags without requiring user intervention in the water.
3Productivity
If users pull on the hand line to retrieve a snagged net, then the net can be retrieved in ideal situations, but it causes hand line breakage or braille line breakage when firmly lodged
Solution Approach 1:
By segmenting the retrieval function into two independent lines (hand line and horn line), the system allows the hand line to maintain its primary retrieval function while the horn line provides additional lifting capability. This prevents the hand line from bearing excessive tension that would cause breakage.
Solution Approach 2:
The system provides dynamic force distribution through the couplers, allowing the horn line to engage and provide additional lifting force when needed. This dynamic adjustment prevents excessive tension on any single line, improving reliability during retrieval operations.
Data Source
AI summary
A dual line cast net retrieving device is disclosed having a cast net body with a central horn connected to a net webbing, to be thrown into a water body for fishing. The cast net retrieving device includes a hand line that is operatively connected to a swivel of the cast net body, and a horn line that is connected in parallel to the hand line through a plurality of couplers. The horn line is removably connected to the central horn of the cast net body. A pulling of the horn line through the plurality of couplers exerts a pulling force upon the central horn, which alleviates tension in the braille lines of the cast net thereby allowing a user to remove the cast net from being snagged on an underwater obstruction, while avoiding breakage of the braille lines and without the user needing to enter the water.