Patent ID: 6187179
Filing Date: 2001-02-13
Classification: A01K

Abstract:
A closed system comprising an outside filter for an aquarium, comprising a housing having an inner chamber, a removable cover for closing said inner chamber of said housing; a supply conduit for supplying water to be filtered into said inner chamber of said housing; a discharge conduit for withdrawing the water from said inner chamber of said housing, a motor-operated pump for withdrawing the filtered water; and a device operable for producing a vacuum for aspirating water into said supply conduit by displacement of air contained in a system that is formed by said inner chamber of said housing together with said discharge conduit which communicates with said supply conduit, said system being hermetically sealingly closed from outside and serving as an evacuatable pressure chamber during the production of vacuum, said device being formed so as to produce the vacuum inside said closed system, said device for producing a vacuum being comprised of parts of said outside filter.