Patent ID: 7018169

Claim:
A device for controlling a fluid flow, the device comprising: at least two fluid flow drivers; a plenum disposed to receive a fluid flaw from the at least two drivers, the plenum having a first cross-sectional area proximate the at least two drivers and a second cross-section area at a distance from the at least two drivers, the second cross-sectional area being an exit for the fluid flow; and a baffle disposed within the plenum and having a first edge restrained proximate the first cross-sectional area and a second opposing edge freely disposed proximate the second cross-sectional area; wherein the baffle has a surface area responsive to the fluid flow within the plenum to reduce a backflow if one of the at least two drivers is operational and another is non-operational; and wherein the baffle flexes in response to an air flow from each of the at least two drivers and in response to a pressure differential across the baffle such that the plenum shape changes to optimize the flow regardless of whether one of the at least two drivers is non-operational.