FISH PASS Russian patent published in 2006 - IPC E02B8/08 

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to fish facilities designed to pass spawners through retaining structures to places of spawning and fattening. Proposed fish pass includes fish conduit connecting upper and lower ponds, perforated cross partitions with convex part pointed to upper pond and installed on horizontal axles for rotation by drive, bottom recesses located under partitions in section line of their mounting whose surface is made to arc of circumference formed by outer edge of cross partition, and control gates. Fish pass has side bypass galleries arranged symmetrically relative to fish conduit. Cross partitions are made in from of hollow cylinders. Surface of cylinders is provided with swim-in holes, size of holes changing over length of circumference of cylinders. Cross partitions rotation drive is made in form of bladed wheels arranged in side bypass galleries and installed coaxially relative to cylinders on horizontal axles of cross partitions. Control gates are installed in side bypass galleries from side of upper pond, and outlet holes of side bypass galleries from side of lower pond are provided with fish racks.

EFFECT: simplified design of fish pass, improved efficiency of fish passing process.

7 cl, 11 dwg