Abstract: Method to make to rotate a drum of a concrete mixer comprising a vehicle provided with a movement unit having wheels, to effect the movement of the vehicle, a concrete mixer mounted on the vehicle and comprising a drum, and a device to selectively make the drum rotate. The method provides to feed an electric motor connected to the drum by means of an electric energy generator unit suitable to selectively feed the electric motor.

Abstract: Method to make to rotate a drum of a concrete mixer comprising a vehicle provided with a movement unit having wheels, to effect the movement of the vehicle, a concrete mixer mounted on the vehicle and comprising a drum, and a device to selectively make the drum rotate. The method provides to feed an electric motor connected to the drum by means of an electric energy generator unit suitable to selectively feed the electric motor.

Abstract: Truck mixer comprising a vehicle provided with a heat engine which cooperates with a movement unit having wheels, to effect the movement of the vehicle, a concrete mixer mounted on the vehicle and comprising a drum, and a device to selectively make the drum rotate. The device comprises an electric motor connected to the drum, and an electric energy generator unit suitable to selectively feed the electric motor.

Abstract: A concrete mixer truck comprises a vehicle provided with a heat engine and a concrete mixer having a rotating drum and an auxiliary device provided with a unit for generating electric energy that selectively feeds an electric motor connected to the rotating drum. The electric energy generating unit comprises at least an alternator selectively connectable to the heat engine and to a movement unit of the vehicle by means of a gearbox and a power take-off positioned between the clutch of the vehicle and the gearbox. The alternator is configured to convert mechanical energy into alternate electric energy and vice versa.

Abstract: Truck mixer with safety device, comprising a drum rotatable around an axis of rotation by means of rotation devices, which comprise a first drive member of the electric type suitable to make said drum rotate, during normal use, and a second drive member that functions as a safety device, able to be selectively actuated in a condition of non-usability, even temporary, of said first drive member, and also suitable to make the drum rotate.

Abstract: A concrete mixer truck comprises a vehicle provided with a heat engine and a concrete mixer having a rotating drum and an auxiliary device provided with a unit for generating electric energy that selectively feeds an electric motor connected to the rotating drum. The electric energy generating unit comprises at least an alternator selectively connectable to the heat engine and to a movement unit of the vehicle by means of a gearbox and a power take-off positioned between the clutch of the vehicle and the gearbox. The alternator is configured to convert mechanical energy into alternate electric energy and vice versa.

Abstract: Truck mixer comprising a vehicle provided with a heat engine which cooperates with a movement unit having wheels, to effect the movement of the vehicle, a concrete mixer mounted on the vehicle and comprising a drum, and a device to selectively make the drum rotate. The device comprises an electric motor connected to the drum, and an electric energy generator unit suitable to selectively feed the electric motor.

Abstract: Truck mixer with safety device, comprising a drum rotatable around an axis of rotation by means of rotation devices, which comprise a first drive member of the electric type suitable to make said drum rotate, during normal use, and a second drive member that functions as a safety device, able to be selectively actuated in a condition of non-usability, even temporary, of said first drive member, and also suitable to make the drum rotate.