Patent ID: 7037070

Claim:
Variable pitch device for two stages of stator blades ( 2 ), arranged on a casing ( 1 ) and provided with an actuator mechanism, and a bellcrank ( 7 , 8 ) for each stage, pivoting on an axis ( 20 , 21 ) of the casing and a stage control connecting rod ( 6 ) connected to a branch of the bellcrank, a synchronization bar ( 9 ) being connected to another branch of at least one of the bellcranks to displace it, characterized in that the synchronization bar is connected to the casing through a groove connection ( 23 ) and a pin ( 22 ) sliding in the groove, and to the bellcrank that it displaces by another groove connection ( 26 ) and a pin ( 27 ) sliding in the another groove.