Outside filter, in particular for aquarium

An outer 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 a water to be filtered into said inner chamber of said housing;
• a discharge opening for discharging a filtered water;
• a motor-operated pump for discharging the filtered water through said discharge opening;
• and an actuating device engaging said cover, said actuating device operable for opening said cover so as to be movable outside of said housing, said actuating device closing said cover to provide sealing condition inside said housing and also holding said cover in a closed position, said actuating device also operable for producing a vacuum formed in part by said housing inner chamber.

An outer 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 a water to be filtered into said inner chamber of said housing;
• a discharge opening for discharging a filtered water;
• a motor-operated pump for discharging the filtered water through said discharge opening;
• and an actuating device engaging said cover, said actuating device operable for opening said cover so as to be movable outside of said housing and closing said cover to provide a sealing condition inside said housing and also holding said cover in a closed position;
• said actuating device comprising transmission means provided between said cover and said housing, said transmission means including cams and associated coulisse tracks.

An outer 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 a water to be filtered into said inner chamber of said housing;
• a discharge opening for discharging a filtered water;
• a motor-operated pump for discharging the filtered water through said discharge opening;
• and an actuating device engaging said cover, said actuating device operable for opening said cover so as to be movable outside of said housing, and closing said cover to provide a sealing condition inside said housing and also holding said cover in a closed position;
• said actuating device comprising a bracket and also comprising and transmission means provided between said cover and said housing, said transmission means including at least two cams and for each of said cams a lifting curve arranged at a distance from said axis of said bracket and a lowering curve arranged at a distance from said lifting curve and engaging with a respective one of said cams, said lifting curve and said lowering curve being provided on one element selected from the group consisting of said bracket and said cover, while said cams are provided on another element of the group consisting of said bracket and said cover.

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;
• and said device comprising transmission means provided between said cover and said housing and including a plurality of cams and for each cam a substantially slot-shaped coulisse track provided with a lifting and a lowering curve for engagement with a respective one of said cams, said cams being provided on one element selected from the group consisting of said cover and a ring rotatably held on said housing, while said coulisse tracks are provided on another of said elements selected from the group consisting of said cover and said ring.