Appliance for the enrichment of water with oxygen, particularly in fish breeding

Claim 1

FISH HATCHERY AND REARING APPLIANCE HAVING MEANS FOR THE ENRICHEMENT OF WATER WITH OXYGEN COMPRISING A FRAME, A PLURALITY OF BOWL-SHAPED CONTAINERS EACH WITH A BOTTOM AND SPACED ONE ABOVE THE OTHER IN THE FRAME AND HAVING INCLINED BOTTOM SURFACES BETWEEN THE CONTAINERS AND A CIRCUMFERENTIAL SIDE WALL TERMINATING IN A RIM AND ALONG THE SIDES OF WHICH OVERFLOW WATER FLOWS INTO THE NEXT LOWER CONTAINER, THE CONTAINERS BEING FORMED SO AS TO BE SYMMETRICAL ROTATION-WISE WITH REFERENCE TO A VERTICAL AXIS AND ARE DISPOSED CO-AXIALLY ONE ABOVE THE OTHER, THE BOTTOM OF EACH CONTAINER HAVING A CONICAL PROJECTION IN THE APROXIMATE CENTER AND ITS UNDERSIDE FORMING DIRECTLY AN INCLINED CONDUCTING SURFACE FOR THE WATER FLOWING OVER AND AROUND THE ENTIRE CIRCUMFERENCE OF EACH CONTAINER AND THEN ALONG THE BOTTOM OF THE CONTAINER TO THE CENTER, AND MEANS ON THE FRAME AND OVER THE TOPMOST CONTAINER TO FEED WATER THERETO AND A FLOW PATH FOR THE WATER EXTENDING FROM THE MEANS TO THE CENTER OF THE TOPMOST CONTAINER OVER THE CIRCUMFERENTIAL RIM INTO THE NEXT LOWER CONTAINER.