The driving head includes an internal driving feature and may include an external-driving feature.

The driving part includes at least a driving piece and the driven includes at least a driven piece.

The elongate drive structure (10) engages about the first and second rotors.

A drive plate of an electromagnetic-fan clutch.

The rod-spinning device may include a drive gear with an open face.

The driving part (13) is controlled so as to drive the driven part (14) in rotation by magnetic coupling with the driving part about a predetermined axis of rotation (81).

A threaded lead screw is received in the reservoir and a plunger has an outer periphery linearly slideable along the side wall of the reservoir and an inner periphery threadedly received on the lead screw.

The invention concerns a device comprising a magnetic driving part (13) and a magnetic driven part (14).

A drive plate through hole (101) is opened in the body of the drive plate, and accommodation walls (107, 107a) are disposed on the magnetic conductive layers.

The drive gear may also be coupled to a plurality of drive pins.

A prolongation part can be easily inserted between the driving machine and the mounting part.

The drive rings (1, 2, 3, 4) on the driver pulley turn in the same direction as the driver pulley through frictional contact with the sides of the CVT driver pulley sheaves.

The closure also includes a driving head and a coaxial removal head.

Each leading part touches the inner cylindrical surface of the hollow cylindrical body.

The driven part (6) is secured to the driving part (1) by cold forming.