FISH PASS Russian patent published in 2005 - IPC

FIELD: hydraulic structures, particularly fish passes adapted for passing brood fishes through support structures to spawning and growth areas.

SUBSTANCE: fish pass includes fish-passing channel connecting upper and lower pools and inlet head with rotary chute defined by side vertical walls. The chute performs rotation in horizontal plane relative longitudinal fish-passing channel axis by means of drive. Inlet head is formed as hollow cylinder arranged coaxially to base and is provided with additional rotary chutes having bottoms. Chute bottom is connected to guiding means arranged coaxially to cylinder. Cylinder has walls formed of corrugated material located in gaps between outlets of rotary chutes and fish-passing channel inlet. Corrugated material is secured to end guiding means by upper and lower edges thereof and to side walls of rotary chutes and to fish-passing channel by outer end edges thereof. Rotary chute width is les than fish-passing channel width.

EFFECT: creation of efficient conditions to attract fish from lower pool and extended fish attraction zone.

5 cl, 30 dwg