Abstract: The disclosure concerns a hydrodynamic torque transfer unit, especially in the form of a hydrodynamic brake. The unit includes a working chamber with a stator and a rotor therein. The rotor is supported on a rotating shaft which has seals thereon outside the working chamber. Working fluid that leaks past the rotor shaft seals is collected in a leaked fluid reservoir. Both the fluid outlet from the leaked fluid reservoir and from the outlet line connected with the working chamber are delivered to a working fluid cooling reservoir. The working chamber is fed with working fluid from a separate feed reservoir. The cooling reservoir delivers recirculated working fluid to the feed reservoir. The feed reservoir is selectively pressurizable to force working fluid into the working chamber.

Abstract: The disclosure concerns a pumping apparatus for working fluid, in a hydrodynamic coupling, or the like. Working fluid is stored in a sump and is to be lifted by a spinning disc to an elevated container from which the working fluid is then directed back into the spinning disc. The periphery of the spinning disc picks up the working fluid from the sump and carries it around to spary it up toward a deflector at the top of the housing which deflects the fluid into the container. A groove-like duct encloses the lower quarter of the disc for directing the fluid back toward the surface of the disc. The disc has a trapezoidal cross-section peripheral groove for further carrying the fluid beyond the top exit of the duct so that the fluid may be thrown toward the deflector at the top of the housing.

Abstract: A braking system utilizing a hydrodynamic brake has a control circuit that adjust the torque exerted by the hydrodynamic brake to adjust the deceleration of the axle on which the hydrodynamic brake is mounted toward a desired value of deceleration, which desired value may be zero.

Abstract: The disclosure concerns a venting device for the housing of a rotary machine. The housing has a venting duct leading from the interior of the housing outwardly through a liquid-mist or oil-mist separator. A peeling device is arranged closely adjacent to the peripheral surface of a rotating member of the rotary machine. The peeling device intercepts the boundary layer of mist laden air that is rotating with the peripheral surface and directs the air boundary layer into the venting duct which in turn extends to a liquid or oil-mist separator or filter. The peeling device thus transforms the kinetic energy of the oil laden atmosphere at the peripheral surface of the rotating member into pressure which will drive the oil-mist laden atmosphere through a filter.

Abstract: A hydrodynamic control coupling having a toroidal working chamber defined by a primary bladed wheel connected with a driving motor and a secondary bladed wheel connected to the driven element; a draining device for draining working fluid from the working chamber; a filling pump supplies working fluid to the working chamber; a valve varies the filling flow to the working chamber; the valve is a flow divider comprised of two interconnected valves including respective valve elements mounted in tandem on a common shaft which is shiftable axially; each of the interconnected valves includes a respective valve seat; as one valve element is moved away from its valve seat; the other valve element is simultaneously moved toward its valve seat; at least one of the valve elements and its seat is tapered to an acute cone angle, with other conically tapered shapes also being disclosed for one or both of the valve element and/or valve seat; one valve chamber supplies working fluid to the working chamber; the other valve cha

Abstract: A rotating fluid coupling of the type which has a primary coupling half and a secondary coupling half which together form a working chamber which is filled with working fluid. A control device which is arranged on the secondary coupling half is used to regulate the rotary take-off drive speed of the coupling by comparing an operating value, such as the centrifugal force which is a result of the rotating drive speed, with a variable command value and when the operating value differs from the command value initiates adjustment of the rotary drive speed. A fluid container on the secondary coupling half revolves with the secondary coupling half. A stationary supply line for control fluid to the fluid container is provided with a permanent outlet opening at a distance from the axis of rotation of the fluid coupling.

Abstract: Arrangement for monitoring the temperature of a moving component: a stationary measuring device including an oscillator; a sensor on the moving component is moved past the measuring device; the sensor includes a coil that is outside the moving component and a cold conductor that senses temperature and changes its impedance in response to temperature changes and that is inside the component and electrically connected to the coil, whereby the coil is effectively short circuited or effectively open on the different sides of a preset temperature level sensed by the cold conductor, and the effective condition of the coil is sensed by the measuring device; a capacitor may be placed in series with the coil; the coil is helical and is in a plane; the coil and the cold conductor and the connecting leads are held in place by an insulating substance; specifics of the sensor body configuration are disclosed.

Abstract: A braking system for automotive vehicles wherein a hydrodynamic brake normally furnishes the required braking torque in all effective positions of the brake pedal but its braking action can be supplemented or replaced by the braking force which is furnished by one or more fluid-operated mechanical friction brakes. The hydrodynamic brake is actuated only when the brake pedal is depressed sufficiently to insure that the pressure of fluid in the brake lines for the mechanical brakes at least equals that (application) pressure at which the pressurized fluid can overcome the friction-induced resistance of moving parts which serve to apply the mechanical brakes.