Patent ID: 7524165

Claim:
A lever for the control of the angular setting of a stator blade in a turboshaft engine, said lever comprising: a first end to be fitted in a fixed manner on a blade pivot, a second end comprising a cylindrical pin for fitting on a drive means, and a flat intermediate part connecting the first and second ends, wherein said first end has a thickness and a width greater than those of the intermediate part and of the second end of the lever, wherein the second end has a thickness greater than that of the intermediate part, and the intermediate part locally has a width less than that of the second end of the lever, wherein the portion of less width of the intermediate part is that connecting the intermediate part to the second end, wherein the intermediate part is of constant thickness and is connected to the ends of the lever by zones of progressively increasing thickness, and wherein the shapes and dimensions of the intermediate part and of the second end are determined in order to increase the natural frequencies of the lever in flexion and in torsion above the vibratory frequencies of the turboshaft engine upstream of the lever and in order to retain the stiffness of the lever.