Patent ID: 7004298

Claim:
Clutch mechanism disposed in a casing ( 1 , 2 ) and constituted by a toothed wheel ( 3 ) driven by an endless screw ( 12 ), this wheel ( 3 ) being securable to a driven shaft ( 15 ) by means of two friction cones ( 5 ) disposed coaxially to the axial bore of the toothed wheel ( 3 ), and coacting, under the action of a control device ( 7 , 13 ), with conical contact areas on the wheel ( 3 ), and provided, on the driven shaft ( 15 ), stop means ( 10 , 11 A) disposed on opposite sides of the friction cones ( 5 ) to constitute axial abutments defining an interval of maximum fixed length adapted to resist the forces applied by means of the control device ( 7 , 13 ) to the friction cones ( 5 ) of the clutch in the clutching phase and thus to support the casing ( 1 , 2 ) that carries the driven shaft ( 15 ) against all forces thanks to a field of application of the forces in a closed circuit.