Abstract: The torque variator device of the invention is a mechanism to be interleaved between a transmission arbor and a conducted arbor, and it includes two circular plates that at the external edges they have double serrated rings. On one hand, said rings include the serration of a peripheric ratchet, and, on the other hand they engage with corresponding conical pinions at the end of the threaded bars, located radially and which are gyratory within a threaded hole in radially displaceable coupling elements of said circular plates. The invention also includes a device for the detection of the radial location of said coupling elements.

Abstract: The present invention is a torque variator device of the type applicable to transmission shafts of a vehicle. The device is interconnected between its conductor and conducted ends. The device includes a conducting piece that conforms a header end that is run through by a plurality of radial throats that constitute the radial displacement guides of perspective articulate arms; a radially expandable set of articulated arms with articulation ends that are proximal to the connection base of the conducing piece; a conducted piece coupled to the conducted end of the transmission shaft and that, coaxially and proximally opposed to the conductor piece; a positional variator provided with radial displacement for the articulated arms; and a control means of the positional variator.