Patent ID: 7467566

Claim:
Anti-backlash device in a gear comprising: a toothed driving gear element comprising two coaxial and toothed members; an elastic attachment being between the toothed members and being adapted to create a torque between the toothed members; a drive shaft to which a first of the toothed members is fixedly attached; a second of the toothed members being freely mounted on the shaft, the second toothed member having a face, opposite and facing away from the first toothed member, the face having first seats arranged around the shaft; deflectable deflection rods having respective first and second ends; each of the first ends being received in one of the first seats, the deflection rods extending, along with the shaft, axially outside of the second toothed member away from the first toothed member; a flange spaced away from the face of the second toothed member, the flange including an axial passage for receiving the shaft, second seats in the flange arranged around the axial passage, the deflection rod second respective ends being received in the second seats; and a clamping device for clamping the flange on the shaft in an angular position around the shaft, the clamping device being fitted to apply to the rods an elastic deflection stress adjustable according to a desired torque between the toothed members, the deflection rods being operable to eliminate the backlash between the toothed members and a toothed wheel driven by the toothed members.