Abstract: The invention relates to a method for the unreleasable fastening of at least one component to a basic component with the aid of a bolt projecting through a bore in the component or components, first the bolt being welded electrically with one end face on the surface of the basic component and subsequently being deformed plastically. So that components consisting of any desired materials can be used, it is proposed, according to the invention, that the shank of the bolt, which has a head, be upset, until the underside of the head lies in regions on the surface of the component. Furthermore, an unreleasable connection of one or more components to a basic component is proposed.

Abstract: In a hydrodynamic torque converter including a working fluid for the transmission of a torque from an engine to an output shaft, a pump impeller, a stator with guide vanes, a turbine wheel connected to the output shaft via a hub-like support, a converter lock-up clutch for locking the pump impeller to the turbine wheel and a torsional vibration damper connected between the turbine wheel and the output shaft and including disk-shaped support elements, annular axially and radially extending gap seals are provided between two adjacent disk-shaped support elements of the vibration damper so as to form a labyrinth seal structure for controlling the flow of fluid through the converter lock-up clutch for cooling the clutch.