Improved decorative waterfall for aquariums

A - Human Necessities – 01 – K

Patent

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Details

A01K 63/00 (2006.01) B44F 7/00 (2006.01)

Patent

CA 2172551

Decorative waterfall structure with continuous sand flow for aquariums forming an ecological medium similar to a marine medium. The structure is formed by moulding and assembly of natural or ceramic stones free from any industrial chemical substance capable of polluting the water. The waterfall structure (S) includes at its base a sand reservoir (13) with a glazed slope (13) leading to the inlet opening (1) of a tube (2) for conventionally raising the sand by means of an external pump (not shown). The water-sand-air mixture is separated at (4), the air being directed to a chamber (6) from which it escapes through a radial tube such as (7), while the rest of the mixture cascades (11) through a reduced outlet between the structure (S) and the steps (10). An opening closed by a plug (14 or 14') at the end of the tube (3) provides a passage for a rod which is used to unblock said opening in the event of an obstruction. As opposed to prior art waterfalls, the structure is spaced apart from the aquarium glass walls, making it easier to clean and enabling fish to swim freely. The simplicity of its construction also reduces costs.

L'invention concerne une structure de cascade décorative à circulation continue de sable pour aquariums constituant un milieu écologique analogue au milieu marin. Elle est constituée par moulage et assemblage de pierres naturelles ou de céramique dépourvues de toute substance chimique industrielle pouvant polluer l'eau de l'aquarium. La structure (S) de la cascade inclut à sa base un réservoir de sable (12) à pente émaillée (13) aboutissant d l'orifice d'entrée (1) d'un conduit d'ascension du sable, assurée par un conduit (2) relié à une pompe extérieure (non représentée), de la manière classique. Au point (4), le mélange eau+sable+air se sépare, l'air étant dirigé vers une chambre (6) d'où il s'échappe vers l'extérieur par un conduit radial tel que (7), tandis que le reste du mélange s'écoule en cascade (11) par une sortie en rétreint (8) ménagée entre la structure (S) et les marches (10). Une ouverture fermée par un bouchon (14 ou 14') à l'extrémité du conduit (3) permet d'y passer une tige pour le déboucher en cas d'obstruction. Contrairement aux cascades antérieures, cette cascade disposée à l'écart des parois vitrées de l'aquarium autorise la libre circulation des poissons et facilite le nettoyage de ses parois. Sa construction simple permet d'en réduire le coût.

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