Patent ID: 6955756

Claim:
A sewer and storm water drainage system for a flow of waste water having a general flow direction, the system comprising: a baffle having a first and second position; said first position being substantially perpendicular to said general flow direction; said second position being substantially parallel to said general flow direction; the baffle having a density less than water to facilitate the movement of the baffle from the first position to the second position and such that the baffle floats on the flow of waste water; a pivot rod connected to said baffle wherein said baffle moves from said first position to said second position when a hydraulic gradient exceeds the force necessary to move said baffle out of said first position; and a torque limiting device to lock the baffle in the first position, to unlock the baffle at a predetermined hydraulic gradient force such that the baffle moves toward the second position, and to enable the baffle to return to and lock in the first position when the hydraulic gradient falls below the predetermined hydraulic gradient force.