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US 5,533,865 AGranted
Wind turbine
AssigneeStork Product Engineering B.V.
InventorsAntonius G. M. Dassen, Franklin Hagg
Life of this patent
Estimating the term…
Abstract
In order to reduce the noise nuisance caused during operation by rotor blades of a rotor of a wind turbine the rear edge of each blade is irregularly formed. In particular the saw-tooth form with a top angle smaller than about 150.degree. and preferably 10.degree. is found to produce a considerable noise reduction.
Claims19
A wind turbine comprising a rotor having a plurality of blades which each have a front edge and a rear edge, wherein the rear edge has a saw-tooth form having a plurality of saw teeth over at least a part thereof and wherein the saw teeth have a hexagonal cross section.
Dependencies are inferred from the claim text.