Sorting device for trawl nets

Details Sorting device for trawl nets Sorting device for trawl nets

1988-03-01

1989-02-21

Crosby, Gene P.

Fishing, trapping, and vermin destroying

Fishing

Nets

A01K 7302

Patent

active

048053350

ABSTRACT:
A sorting device (42) for a bottom trawl (10) to enable capturing preselected marine life and harmlessly separating nonselected marine life. The sorting device (42) comprises a top wall (44) and a bottom wall (46) assembled together to form a body (48) that defines an inlet (50) and tapers to a small outlet (52). The sorting device (42) assumes a funnel configuration as the bottom trawl (10) is towed through the water. Water flowing through the funnel-shaped body (48) moves slower than the surrounding water, forcing water approaching the sorting device (42) to flow around and past the sorting device (42). This creates a water disturbance (94) adjacent and ahead of the sorting device (42) that frightens finfish (96) to swim around the sorting device (42). Shellfish (98) are unable to swim around the sorting device (42) and they pass through the inlet (50) and out the outlet (52) to harmlessly exit the bottom trawl (10 ).

REFERENCES:
patent: 3195261 (1965-07-01), Luketa
patent: 3440752 (1969-04-01), Minter
patent: 4043068 (1977-08-01), Savoie
patent: 4402154 (1983-09-01), Pence
patent: 4739574 (1988-04-01), Saunders
"New Dutch Beam Trawl Stops Flatfish Slaughter", World Fishing, Jun. 1965, pp. 96 and 99.
"U.S. Design for `Separator` Shrimp Trawl", World Fishing, Jun. 1969, pp. 60-62.

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