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US 4,257,350 AGranted
Method and device for practicing marine aquaculture
AssigneesFrancis Devin, Camille Lemarchand, Antonius Streichenberger
InventorRodolphe H. Streichenberger
Life of this patent
Estimating the term…
Abstract
A method and device for practicing aquaculture in the open sea which basically comprises a bow net means of rigid construction having means permitting it to float in a partially submerged condition or fully immersed in the water without touching the bottom of the sea. The bow net means includes constant-buoyancy tanks and variable-buoyancy tanks, the latter being adapted to be filled with either air or water.
Claims41
A device for practicing marine aquaculture in the open sea comprising:
- container means which allows the passage of water therethrough for containing fishes or alevins therein, buoyancy means for controlling the buoyancy of the device comprising permanent-buoyancy means and variable-buoyancy means, said variable-buoyancy means being provided with inlet means for introducing a buoyancy gas thereto and also being provided with a permanently open downwardly directed discharge opening and descent limiting weight means including a plurality of weights suspended underneath said container means for limiting the descent of said container means completely to the bottom of the sea when the buoyancy of said variable buoyancy means is reduced or cancelled out.
Dependencies are inferred from the claim text.