Patent ID: 8226364

Claim:
A blade ( 10 ) extending longitudinally from a root ( 11 ) of the blade ( 10 ) to a free end ( 12 ) of said blade ( 10 ), the blade ( 10 ) being provided with an incorporated resonator ( 20 ) for reducing the drag movements (F 1 , F 2 ) of said blade ( 10 ), said resonator ( 20 ) being provided with a closed tank ( 30 ) that is partially filled with a liquid ( 50 ), wherein said resonator ( 20 ) includes a central tube ( 40 ) immersed inside said tank ( 30 ), the tank ( 30 ) and the central tube ( 40 ) being arranged in a longitudinal direction (Y) of the blade ( 10 ), said central tube ( 40 ) having first and second ends ( 41 , 42 ) that communicate with said tank ( 30 ) so that said liquid ( 50 ) can move from the tank ( 30 ) into the central tube ( 40 ), and vice versa.