Patent ID: 8945375
Filing Date: 2015-02-03
Classification: E03F,F15D

Abstract:
1. A fluid flow control and debris intercepting apparatus for controlling flow through a structure having an opening defining a fluid flow channel comprising: (a) a support member connected to the structure and spanning the fluid flow channel; (b) a plurality of transversely spaced apart flow control vanes carried by said support member for controlling fluid flow through the fluid flow channel, each of said flow control vanes being movable between a first position and a second position permitting an increase in the volume of fluid flow through the fluid flow channel; and (c) a yieldably deformable biasing member connected to each of said flow control vanes for resisting movement of each of said flow control vanes toward said second position, said biasing member comprising a coil spring connected to each of said flow control vanes.