US 4,067,809 AGranted

Filtering system for fish-farming water

OwnerYukio Katoinventor

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Abstract

A filtering system is disclosed for effectively filtering the water of aquariums for tropical or salt-water fish, the water of fish-farming ponds, and/or any other type of fish-farming water. The system includes a filtration tank partitioned into a storage chamber, a filtration chamber, and a discharge chamber, and the fish-farming water is successively passed through the storage and filtration chambers so as to be purified, and is discharged along the water surface by means of a discharge mechanism within the discharge chamber. A lift pipe is provided at one end of the storage chamber, and filters and vacancies are alternately arranged in a parallel manner within the filtration chamber, with an open spaced defined thereabove. The water level of the filtration tank is maintained lower than the top of the filters, and the filter layers may be sets of two water-passing plates, such as, for example, multipore plates, net-type plates, or the like, with the filter medium, such as, for example, glass wool, sand, or the like, packed therebetween or attached thereto. The discharge chamber is equipped with a discharge pipe which has an opening directed along the surface of the water, and in this manner, the fish-farming water is prepurified in the storage chamber, further purified in the filtration chamber, and discharged along the water surface so as to be uniformly circulated in an installation for fish-farming. The water is constantly maintained in an aerobic state and an extremely high purification efficiency is obtained.

Claims10

Dependent claims

A filtering system for fish-farming water operatively associated with a water tank, comprising:

a filtration tank divided into a storage chamber, a filtration chamber, and a discharge chamber by means of partition plates;
the side length of said filtration tank is less than the width and height thereof;
the inside of said filtration tank is divided by means of said partition plates in the widthwise direction into said storage chamber and said filtration chamber, and is further divided in the length direction, at one end thereof, so as to provide said discharge chamber;
a lift pipe is provided within one end of said storage chamber so as to introduce said fish farming water upwardly from said water tank and into said storage chamber;
means for successively passing the fish-farming water through said storage chamber and said filtration chamber so as to purify said water includes a connecting passage which extends from said storage chamber to said filtration chamber at one lower end of said partition plate separating said storage chamber from said filtration chamber;
water passages from said filtration chamber to said discharge chamber are provided at the upper part of said partition plate separating said filtration chamber from said discharge chamber;
vertically disposed planar filters and vacancies allowing water to pass in the widthwise direction are alternately arranged in a parallel fashion in the widthwise direction within said filtration chamber;
an open space is defined solely above all of said filters and said vacancies within said filtration chamber by disposing the upper ends of all of said filters at a height less than the upper extent of the walls of said filtration tank and said partition plate separating said storage chamber from said filtration chamber so as to permit said water to successively overflow said filters when said filters become clogged in a successive manner in the widthwise direction of said filtration chamber;
the water level within said filtration chamber is normally maintained below the top of said filters, and
discharging means disposed within said discharge chamber for discharging said water along the surface of the fish-farming water within said water tank for circulating said water within said water tank.

7 more elements

A filtering system for fish-farming water operatively associated with a water tank comprising:

a filtration tank divided into a storage chamber, a filtration chamber, and a discharge chamber by means of partition plates;
water supply means operatively associated with said storage chamber for introducing said fish-farming water upwardly from said water tank and into said storage chamber;
the side length of said filtration tank is less than the width and height thereof;
the inside of the filtration tank is divided by means of said partition plates extending parallel to said side length so as to successively form said storage chamber, said filtration chamber, and said discharge chamber in a linear fashion;
the partition plate separating said storage chamber from said filtration chamber and the partition plate separating said filtration chamber from said discharge chamber are perforated at the upper parts thereof so as to allow water to overflow said plates and flow successively in the width-wise direction;
vertically disposed planar filters and vacancies, for allowing said water to pass in the width-wise direction, are alternately arranged in a parallel manner in the width-wise direction within said filtration chamber;
an open space is defined solely above all of said filters and said vacancies within said filtration chamber by disposing the upper ends of all of said filters at a height less than the upper extent of the walls of said filtration tank and said partition plate separating said storage chamber from said filtration chamber, the upper end of every other filter being disposed at a level higher than the upper ends of the other filters and the water level within the filtration chamber, and said every other filter being disposed above the bottom of said filtration tank, so as to define a vertical serpentine flow path within said filtration chamber and to permit said water to successively overflow said filters when said filters become clogged in a successive manner in the width-wise direction of said filtration chamber;
the water level within said filtration chamber is normally maintained below the top of said filters;
means for passing said water from said storage chamber into said filtration chamber while in contact with the surfaces of said filters so as to filter said water;
and
discharge means disposed within said discharge chamber for discharging said water along the surface of the fish-farming water within said water tank for circulating said water within said water tank.

8 more elements

A filtering system for fish-farming water operatively associated with a water tank comprising:

a filtration tank divided into a storage chamber, a filtration chamber, and a discharge chamber by means of partition plates;
water supply means operatively associated with said storage chamber for introducing said fish-farming water upwardly from said water tank and into said storage chamber;
the side length of said filtration tank is less than the width and height thereof;
the inside of the filtration tank is divided by means of said partition plates extending parallel to said side length so as to successively form said storage chamber, said filtration chamber, and said discharge chamber in a linear fashion;
the partition plate separating said storage chamber from said filtration chamber and the partition plate separating from said filtration chamber from said discharge chamber are perforated at the upper parts thereof so as to allow water to overflow said plates and flow successively in the width-wise direction;
vertically disposed water-passing planar filters and vacancies, for allowing said water to pass in the width-wise direction, are alternately arranged in a parallel manner in the width-wise direction within said filtration chamber;
means defining a vertical serpentine flow path within said filtration chamber by means of an open space above the water-passing filters and vacancies arranged alternately in the width-wise direction by disposing the upper ends of all of said filters at a height less than the upper extent of the walls of said filtration tank and said partition plates separating said storage chamber from said filtration chamber and by disposing the upper end of every other water-passing filter at a level higher than the upper ends of the other water-passing filters and the water level within the filtration chamber, and means defining a spacing within the bottom of said filtration chamber by disposing said every other water-passing filter above the bottom of said filtration tank;
the water level within said filtration chamber is normally maintained below the top of said filters;
means for passing said water from said storage chamber into said filtration chamber either along said serpentine path or width-wise through said filters;
and
discharge means disposed within said discharge chamber for discharging said water along the surface of the fish-farming water within said water tank for circulating said water within said water tank.

8 more elements

Dependencies are inferred from the claim text.