Patent ID: 11920314
Assignee: PERCHERON POWER, LLC
Field: Civil engineering (Other fields)
Classification: CPC E  Y | IPC E

Claim 7:
8. A fish pass system, comprising:
a plurality of blade segments defining a helical blade, each of the plurality of blade segments removably attachable to each other along a helical length of the helical blade, and each of the plurality of blade segments including:
a first side opposite a second side;
an outside diameter extending between the first side and the second side of each of the plurality of blade segments along the helical length of the helical blade; and
an inside diameter extending between the first side and the second side of each of the plurality of blade segments along the helical length of the helical blade, the inside diameter for controlling a flow of water flowing in a direction from the first side and the second side of each of the plurality of blade segments along the helical length of the helical blade, the inside diameter defining an open center of the fish pass system, at least a first blade segment of the plurality of blade segments overlapping a second blade segment of the plurality of blade segments from the outside diameter of helical blade to the inside diameter of the helical blade,

wherein fish traveling in an opposite direction to the direction of the flow of the water pass through the fish pass system by a volume of water contained in a space between two adjacent turns of the helical blade as the helical blade is rotating, and
fish traveling in the direction of the flow of the water pass through the open center of the fish pass system within the inside diameter of the helical blade.