Fluid reaction surfaces (i.e. – impellers) – With control means responsive to non-cyclic condition... – Responsive to condition of torque or thrust of device or...
Reexamination Certificate
2007-02-06
2007-02-06
Nguyen, Ninh H. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With control means responsive to non-cyclic condition...
Responsive to condition of torque or thrust of device or...
C416S044000, C416S135000, C416S147000, C416S202000, C416S206000
Reexamination Certificate
active
10502856
ABSTRACT:
A wind turbine with at least one blade having a pitch axis that is offset laterally so that the blade does not intersect with an axis of rotation of the wind turbine, and a center of mass and an aerodynamic center are offset from the pitch axis in the direction parallel to the axis of rotation of the wind turbine. The blade is arranged so that the blade can pitch towards stall against the action of a resilient device and also so that the centrifugal loading on at least one of the blade and one or more components optionally attached to the blade, acts against the spring in a direction to shed power by pitching the blade towards stall and also so that the torque loading provided by a power conversion device acts to pitch the blade in the opposite direction, so as to reduce the amount of load shedding whenever the power is being extracted from the wind turbine.
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Balson John Charles
Cann Robert James
Irving David
Wastling Michael Andrew
Iskra Wind Turbine Manufacturers Ltd.
Nguyen Ninh H.
Nixon & Peabody LLP
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