Abstract: A coupling device for the transmission of torque. The coupling device includes a drivable rotor part, an output shaft rotatably connected with an armature part, a hysteresis part disposed on the armature part, permanent magnets configured to generate a magnetic field through which magnetic field a torque can be transmitted from the rotor part to the armature part, a stator part in which an electromagnet is disposed, the electromagnet being configured to induce a magnetic flux in the rotor part so as to adjust a torque from the rotor part to the armature part, and a synchronous coupling disposed between the stator part and the armature part.

Abstract: A coupling device for the transmission of torque. The coupling device includes a drivable rotor part, an output shaft rotatably connected with an armature part, a hysteresis part disposed on the armature part, permanent magnets configured to generate a magnetic field through which magnetic field a torque can be transmitted from the rotor part to the armature part, a stator part in which an electromagnet is disposed, the electromagnet being configured to induce a magnetic flux in the rotor part so as to adjust a torque from the rotor part to the armature part, and a synchronous coupling disposed between the stator part and the armature part.

Abstract: Proposed is a closing device (1) for applying screw tops to containers, in particular beverage bottles, comprising a coupling (5) which transmits a torque from a drive unit to a screw top, the drive unit comprising a drive rotor and an output rotor as well as a torque-transmitting device having at least one magnet and a hysteresis material which interacts with same, or at least one additional magnet. The closing device (1) is characterized by at least one sensor (9) which detects the relative position between the drive rotor (21) and the output rotor (23).