Abstract: A hydrodynamic-mechanical vehicle drive wherein an engine drives the primary portion of an input clutch whose secondary portion can receive torque with varying degrees of slip and rotates the pump of a counter-rotating hydrodynamic torque converter, either directly or through the medium of a differential. The turbine of the converter is adjacent to the inlet side of the pump and drives the input shaft of a reversing gearing which utilizes a friction clutch to drive the take-off shaft forwardly and a friction brake to drive the take-off shaft in reverse. The turbine and the pump rotate in the same direction during hydrodynamic braking and the pump is then rotated at a speed which depends on the degree of slip of primary portion of the input clutch relative to the secondary portion.

Abstract: The compressor includes a housing defining a pressure space including chambers and passages connected thereto for conveying sealing and lubrication liquid to and from an impeller shaft rotatably mounted in the housing. The impeller shaft is stepped and mounted for limited radial movement, and includes an elastically bendable torsion shaft portion having a diameter which is a minimum with respect to the torsional stresses imposed thereon. A relieving piston is carried by the torsion shaft portion and the impeller shaft further includes a main compressor shaft portion carrying at least one impeller. A torsion shaft sealing surrounds the torsion shaft portion and serves as the main sealing forming a shield between the pressure within the pressure space and atmospheric pressure.

Abstract: A torque-delivering vehicle drive system having a friction clutch actuated by a pressurized medium, a hydrodynamic working circuit including a pump wheel and a turbine wheel, operatively connected to the friction clutch and a device including an operating lever for adjusting pressure and/or rate of flow of the pressurized medium to the friction clutch including a regulating device for maintaining the torque delivered by the vehicle drive system at a constant value corresponding to a given position of the operating lever, and means for supplying to the regulating device a measured quantity that is a function of a difference in working fluid pressure producible by the pump wheel of the hydrodynamic working circuit.