Patent ID: 6394745
Filing Date: 2002-05-28
Classification: F03D,Y02E

Abstract:
A wind turbine device of the vertical axis type comprising:a static support structure rotatably supporting a rotor assembly at its substantially vertical turbine drive shaft connected to a power generator member, the rotor assembly also includes; a plurality of vertical blade members equally and circumferencially spaced apart from and parallel to said shaft, said blade members having a leading and a trailing edges, said blade members being vertically pivotally mounted at their top and bottom extremities and close to said leading edge to respective rigid horizontal support struts to allow for a variable pitch angle of said blade members from a neutral position with said blade member being essentially tangential to said shaft, each of said horizontal support struts being fixedly radially secured to said shaft; a short horizontal arm secured at one end on respective of said blade members and substantially tangential to said shaft and secured at a second end to a first extremity of a respective rigid horizontal control rod; a second extremity of each of said control rod is secured to a common control disc member rotatably mounted to said shaft; and a control disc biasing member secured to said shaft and biasing said control disc member against any positive common angular pivoting change of said pitch angle of said blade members about their respective pivoting axis.