Patent ID: 7523761
Filing Date: 2009-04-28
Classification: E03F,F16K,Y10T

Abstract:
1. A device for controlling fluid flow from a rain retention chamber, comprising: an inlet configured to communicate with the chamber to permit fluid in the chamber to flow into said device; an outlet configured to permit fluid from said inlet to flow out of said device; a shutter disposed between said inlet and said outlet, and supported in said device for linear shifting between a raised position, and a lowered position; a control element rotatably mounted in said device for rotation about a central axis, and including a curved, rotating controller surface which is non-concentric with said central axis of said control element, such that rotation of said control element and said rotating controller surface about said central axis varies the radial distance between said central axis and said rotating controller surface as measured along an associated radially extending reference line extending therebetween; a coupler member operably connecting said shutter with said rotating controller surface, such that rotation of said control element and said rotating controller surface about said central axis shifts said shutter between said raised and lowered positions to achieve a predetermined flow rate of fluid from the chamber; a sensor adapted to detect fluid level in the chamber, and including an actuator which shifts as a function of the fluid level in the chamber; and a transmission member operably connecting said actuator with said control element, whereby linear shifting of said actuator in response to fluid level fluctuations in the chamber rotates said control element and said rotating controller surface about said central axis to selectively shift said shutter in a direction which achieves said predetermined flow rate.