Patent ID: 6435827
Filing Date: 2002-08-20
Classification: B63H,B63J,B64C,F01D,F03D,Y02E,Y02T

Abstract:
An apparatus for generating a fluid flow comprising:a support frame; two rotatable members mounted to said support frame, each said rotatable member configured for rotation about a respective axis; a motor operably coupled to at least one of said rotatable members, said motor selectively rotating the at least one rotatable member; a drive belt connecting the rotatable members and traversing a path, said drive belt traversing an upper flight and a lower flight; a plurality of shafts spaced along the path, each shaft pivotally coupled with said drive belt and oriented generally parallel to said axes of said rotatable members; a plurality of blade pairs each having first and second blades, wherein each said first blade is commonly journalled on a corresponding one of said shafts with one of said second blades such that each of said first and second blades is independently pivotal for providing a first and a second inclination angle, respectively; and a control mechanism coupled to each of said shafts, wherein the first and second inclination angles in each of the blade pairs is independently adjustable by the control mechanism.