Fish breeding cage structure

Claim 2

A fish breeding cage structure comprising a cage, means for retaining said cage entirely below the surface of the water, said cage having an upper portion, means defining an opening in said upper portion, guide means extending from inside said cage to the surface of the water, a feeding means movably mounted on said guide means for moving between the surface and the inside of said cage for supplying food to fish inside said cage, means for moving said feeding means along said guide means, a closing device for closing said opening when said feeding means is located within said cage, and said feeding means moving said closing device when said feeding means is raised.

Claim 3

A fish breeding cage structure as claimed in claim 1, wherein said feeding means has a negative floatability and includes a line for raising it along said guide means.

Claim 4

A fish breeding cage structure as claimed in claim 1, including a chamber at the bottom of said cage for receiving a predator and means defining an orifice putting the interior of said cage in communication with said chamber for eliminating dead fish from the interior of said cage.

Claim 5

A fish breeding cage structure as claimed in claim 1, including a base located at the bottom of the water and means for guiding said cage onto said base.

Claim 6

A fish breeding cage structure as claimed in claim 1, wherein said guide means includes a float for floating on the surface of the water and a cable attached to said cage in a region adjacent the bottom thereof, said feeding means being slidable along said cable.

Claim 7

A fish breeding cage structure as claimed in claim 5, wherein said closure device is slidable along said cable.

Claim 8

A fish breeding cage structure comprising a cage, means for retaining said cage entirely below the surface of the water, said cage having an upper portion, means defining an opening in said upper portion, guide means extending from inside said cage to the surface of the water, a feeding means movably mounted on said guide means for moving between the surface of the water and the inside of said cage for supplying food to fish inside said cage, means for moving said feeding means along said guide means, a closing device for closing said opening when said feeding means is located within said cage, said closing device including a first closure means normally occupying a position for closing said opening, and said feeding means moving said closure means away from closing position upon an upward passage of said feeding means through the opening and returning said closure means to a closing position upon a downward passage of said feeding means through said opening.

Claim 9

A fish breeding cage structure comprising a cage, means for retaining said cage entirely below the surface of the water, said cage having an upper portion, means defining an opening in said upper portion, guide means extending from inside said cage to the surface of the water, a feeding means movably mounted on said guide means for moving between the surface of the water and the inside of said cage for supplying food to fish inside said cage, means for moving said feeding means along said guide means, a closing device for closing said opening when said feeding means is located within said cage, said closing device including a first closure means normally occupying a position for closing said opening, and said feeding means moving said closure means away from closing position upon an upward passage of said feeding means through the opening and returning said closure means to a closing position upon a downward passage of said feeding means through said opening.

Claim 10

A fish breeding cage structure as claimed in claim 7, wherein said closing device includes a flexible wall which constitutes in combination with said opening of said cage and said first closure means a completely closed enclosure.

Claim 11

A fish breeding cage structure as claimed in claim 7, wherein said first closure means includes a member which is disposed above said opening and has negative floatability.

Claim 12

A fish breeding cage structure as claimed in claim 7, wherein said feeding means includes an upper bearing portion for engaging and urging said first closure means away from said closing position in said upward movement of said feeding means.

Claim 13

A fish breeding cage structure as claimed in claim 7, including a seat mounted on said cage, said first closure means being movably mounted on said guide means of said feeding means and bearing against said seat in said closing position.

Claim 14

A fish breeding cage structure as claimed in claim 7, wherein said closing device includes a second closure means which is normally spaced from said opening and capable of moving into a position for closing said opening upon the upward passage of said feeding means through said opening and moving away from said closing position upon the downward passage of said feeding means.

Claim 15

A fish breeding cage structure as claimed in claim 12, wherein said first and second closure means are two separate elements.

Claim 16

A fish breeding cage structure as claimed in claim 12, wherein said second closure means includes a member which is disposed below said opening and has positive floatability.

Claim 17

A fish breeding cage structure as claimed in claim 12, wherein said feeding means includes a lower bearing portion for engaging and urging said second closure means away from said closing position in said downward movement of said feeding means.

Claim 18

A fish breeding cage structure as claimed in claim 12, including a seat mounted on said cage, said second closure means being movably mounted on said guide means of said feeding means and bearing against said seat in said closing position.