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

Claim 0:
1. A fish pass system, comprising:
a helical blade including:
a first side;
a second side opposite the first side;
an outside diameter extending between the first side and the second side; and
an inside diameter extending between the first side and the second side, the inside diameter for controlling a flow of water flowing in a direction from the first side to the second side, the inside diameter defining an open center of the fish pass system,
wherein fish traveling in an opposite direction to the direction of the flow of the water pass through the fish pass system by riding or swimming in a volume of water contained in a space between two adjacent turns of the helical blade as the helical blade is rotating upstream or uphill,
fish traveling in the direction of the flow of the water pass through the open center of the fish pass system by swimming or moving over the inside diameter of the helical blade, and
wherein the helical blade is a first blade segment of a plurality of blade segments, the fish pass system further comprising a second blade segment of the plurality of blade segments, the first blade segment overlapping the second blade segment from the outside diameter of the helical blade to the inside diameter of the helical blade.