Patent ID: 6623210
Filing Date: 2003-09-23
Classification: E02B,Y02A

Abstract:
A guidance system for diverting flood water from a selected zone to be protected to a drainage conductor, comprising:a guidance plate disposed in the vicinity of an upstream side of the selected zone to be protected, means forming a chamber disposed below ground and configured to receive said guidance plate in a position at which a top of said guidance plate is normally positioned below ground, and a drive system including at least one drive device having a water operated piston-cylinder unit including a fixed first water pressure cylinder having an opening communicating with a source of feed water, a first piston movable in said first water pressure cylinder, a second water pressure cylinder integrally formed with said first piston and movable therewith, a through-hole in said first piston establishing fluid communication between the interior of said first water pressure cylinder and said second water pressure cylinder, and a piston movable in said second water pressure cylinder having a piston rod operatively connecting with said guidance plate for moving said guidance plate between said chamber to a predetermined height above ground.