Fluid reaction surfaces (i.e. – impellers) – With measuring – testing – signalling or inspection means
Reexamination Certificate
2011-03-01
2011-03-01
Nguyen, Ninh H (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With measuring, testing, signalling or inspection means
C416S001000, C416S023000, C416S228000
Reexamination Certificate
active
07896614
ABSTRACT:
A wind turbine includes an electrical stall sensor configured on a pressure surface of at least one turbine blade at a location to detect backflow in a stall condition. The stall sensor includes a flap pivotally configured on the respective pressure surface so as to be moved from a first position towards a second position by backflow over the pressure surface during a stall condition. A sensor circuit responds to movement of the flap between the first and second positions and generates a corresponding electrical signal that indicates the stall condition.
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Dorthy & Manning, P.A.
General Electric Company
Nguyen Ninh H
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