Patent ID: 7810452

Claim:
A basin capable of containing aquatic animals comprising: a front housing compartment with a lower point for collecting the organic material to be removed; an equipment compartment at the back of the basin, integral to said housing compartment; a drainage device, in said equipment compartment, which comprises an “overflow” pipe fixed to a siphon, said siphon comprising a small, calibrated hole arranged approximately at a top of said siphon; said drainage device adapted to assume an upper position and a lower position in said equipment compartment; and, a partition between said housing compartment and said equipment compartment, said partition comprising apertures arranged to keep the animals inside the housing compartment and to let a water pass into the equipment compartment, and a bottom opening directly communicating between said housing compartment and said equipment compartment, wherein when said drainage device is in said lower position said drainage device operates said siphon to draw away said water and said organic material through said bottom opening, said equipment compartment has an upper part and an extension tailpiece, said extension tail piece directly facing a lower-back part of said housing compartment and said equipment compartment has a hole at the bottom of said upper part surrounded by a bellows, said drainage device is installed in the bellows and sticks out of the equipment compartment through said hole, said siphon is in the shape of an inverted U, two portions of the siphon branch out downwards from the top, one of which is positioned inside said extension tailpiece and sucks the water from said lowest point of the basin, whereas the other makes the water flow out of the basin through said hole located at the bottom of the equipment compartment.