Shellfish Meat Extraction Device Using Pneumatic Blow Tubes
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Solution Overview
Problem
The process of deshelling shellfish, particularly lobsters, is tedious and labor-intensive due to the complex structures of claws, knuckles, and tails, making automation difficult and costly, resulting in a time-consuming process that relies heavily on manual labor.
Innovation Solution
A shellfish meat extraction device that uses compressed air to blast meat out of shells, featuring a custom-designed blow tube with a silicone liner and a cylindrical rotary drum that moves blow tubes through receiving, extraction, and discard positions, allowing for efficient meat removal and shell disposal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated means are developed to extract meat from shellfish with complex structures (claws, knuckles, tails), then productivity is improved, but device complexity and cost increase significantly
Solution Approach 1:
The device divides the shellfish processing into separate stages: receiving position, extraction position, and discard position. Multiple blow tubes are arranged in rows on a rotating drum, with each tube handling a specific shellfish part independently. This segmentation allows complex structures to be processed through standardized, simplified operations at each station.
Solution Approach 2:
The invention uses pneumatic pressure differentials (compressed air and vacuum) to achieve meat extraction without complex mechanical mechanisms. The blow tube uses vacuum to create negative pressure for receiving parts, then compressed air to create positive pressure for meat ejection. This pneumatic system replaces complex mechanical gripping and extraction mechanisms.
2Device complexity
If manual labor is used for deshelling shellfish, then device complexity is reduced, but time consumption and labor intensity increase
Solution Approach 1:
The rotating drum continuously moves blow tubes through all three positions (receiving, extraction, discard) in a seamless cycle. Multiple blow tubes work simultaneously on different shellfish parts, ensuring continuous processing without idle time. The system maintains constant operation from part reception to shell disposal, eliminating the stop-start nature of manual processing.
Solution Approach 2:
The blow tube system is self-regulating through automated vacuum and pressure cycles. The silicone liner automatically expands and contracts in response to pressure changes, creating sealing and release actions without manual intervention. The system serves itself by automatically transitioning between receiving, extraction, and discard modes through rotational movement and pressure differential changes.
3Manufacturing precision
If a blow tube with silicone liner is used to seal around shellfish parts, then meat extraction precision is improved, but device complexity increases
Solution Approach 1:
The blow tube employs a flexible silicone liner that can deform to conform to the shape of different shellfish parts. This flexible membrane creates an adaptive seal around irregular surfaces without requiring complex rigid sealing mechanisms. The silicone material's elasticity allows the same simple tube design to accommodate various part geometries with precision.
Solution Approach 2:
The system controls the silicone liner's state by changing pressure parameters - applying vacuum to collapse the liner for precise fitting, then applying compressed air to expand it for sealing and meat ejection. These parameter changes (pressure differentials) enable the same simple flexible liner to perform multiple functions with high precision across different operational phases.
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 automates the deshelling process in a cost-effective manner, significantly reducing manual labor and time consumption by efficiently extracting meat from shellfish parts like lobster claws and knuckles, while ensuring proper disposal of shells.
Implementation Method 1
a vacuum is applied to the blow tube to pull the bladder back against the inner walls of the blow tube to create space that allows the part to fall into the tube
Implementation Method 2
A blast of air is then sent to this chamber from an airline connected to the blow cap on one end of the blow tube and, due to the bladder seal, air is directed through the inside of the knuckle shell, or out the laser cut hole in the claw, taking the claw and knuckle meat with it
Data Source
AI summary
A shellfish meat extraction device that automates that process of extracting meat from shellfish parts, such as lobster claws and knuckles, by using pressurized tubes to grip the parts, cut the shell, and then bursts of pressure to effectively shoot the meat out of the part, after which the empty shell is discarded and the process repeated.