Abstract: A hydrodynamic brake system wherein the extent to which the working chamber between the rotor and stator is filled with braking liquid is regulated by a valve which is adjustable by a measuring device having an overflow line communicating with two spaced-apart portions of the working chamber and containing two flow restrictors. The end portions of the overflow line are positioned in such a way that a continuous stream of liquid flows through the overflow line when the rotor is driven. At least one of the flow restrictors is adjustable so as to insure that the pressure of liquid in the overflow line between the flow restrictors is indicative of the real braking action of the system. Such pressure is used for adjustment of the valve to thus insure that the extent to which the working chamber is filled varies in response to changes in rotational speed of the rotor so as to guarantee a reproducible progress of the braking action.

Abstract: A dual chamber hydrodynamic retarder in a torque converter and power shift gear transmission. The retarder inlet at a point in the stator housing extends radially inward into a radial outer port of one stator in alignment with toric flow. The toroidal flow is divided by transfer ports extending radially outward and axially in the rotor to the other chamber to simultaneously fill both chambers. Each chamber has an outlet at a point in the stator and within its outer diameter dividing axial toric flow into outlet flow and continuing toric flow. Both the inlet and outlet provide toric flow pumping.

Abstract: A hydrodynamic brake system for the wheel of a vehicle, particularly for the non-driven wheel of a trailer, forms an integral unit which is installed within the confines of the wheel rim at one side of the hub. The stator of the brake system is mounted on the non-rotating axle for the wheel, and the rotor of the brake system is connected with a reservoir for a supply of hydraulic brake fluid and is rotated by the hub and/or rim. The reservoir is connected by discrete feeding and evacuating conduits with a toroidal working chamber which is defined by the stator and rotor, and a portion of the reservoir is exposed to the surrounding atmosphere so as to promote the cooling of brake fluid therein.

Abstract: A hydraulic retarder for braking a shaft has a rotor comprising a rotor shell mounted on the shaft end and rotatively movable relative to a stator shell forming part of a stator enclosing the rotor. The shaft end projects from a housing upon which the stator is mounted by an apertured structure surrounding a driving pulley mounted on the shaft end. The apertured structure comprises lugs on the housing and a toothed ring on the stator, the teeth in the ring co-operating with the lugs so as to hold the stator centred on the axis of the shaft end irrespective of the angular position of the stator. Recesses between the teeth of the ring are disposed and dimensioned so that they provide the necessary openings for moving an endless belt into or out of the structure simply by moving the stator through an angle.

Abstract: A temperature and speed responsive control for a fluid coupling adapted to drive a cooling fan for an internal combustion engine. The coupling is of the hydrokinetic type and includes an input or drive member adapted to be driven by the engine, an output or driven member defining a housing adapted to carry the fan, a fluid working chamber defined by the drive and driven member, a cylindrical sleeve controlled by a fluid pressure and operative to vary the output speed by controlling fluid circulation in the working chamber, means in the working chamber for producing the fluid pressure, and temperature and speed responsive means for controlling the fluid pressure to the sleeve in response to temperature and speed changes.

Abstract: A non-exhaustable permanent brake for a vehicle motor, which includes a fluid operable braking unit arranged in the housing of the vehicle motor and comprising a pump wheel which is drivingly connected to the crankshaft of the motor and is interposed in a liquid lubricant circulating circuit. This pump wheel has associated therewith a follower which normally is freely and under no load rotated by the liquid lubricant circulated by the pump wheel but can be arrested by a friction brake to brake the pump wheel and thereby the motor.

Abstract: This invention describes an improved type of hydromatic brake in which the stators and rotors are prepared as individual items and the assembly is designed so that one, two, three or more sets of individual stators and rotors can be assembled inside a housing. The housing comprises a pair of end walls. Each stator has an outwardly extending planar annular flange which is clamped between the two end walls at their outer rim to provide a closed housing. When more than one stator is used an additional tubular flanged spacing element is provided, and two stators are clamped, one on each end of the annular tubular spacing element and the end walls are clamped to the stators. A second important feature of this invention lies in the design of the stator which carries an overhanging lip or peripheral rim into which the rotor fits. There is a selected radial clearance between the outer circumference of the rotor and the inner radius of the lip.

Abstract: A hydrodynamic brake for vehicles, particularly for motor vehicles which includes at least one stationary blade wheel and at least one rotating blade wheel whose blades have any desired blade angle and have an external circulation for the working liquid provided possibly with a cooler; the working liquid leaves the working circulation substantially tangentially at least at the discharge and under utilization of the dynamic pressure by way of one or several discharge apertures provided in the stationary blade wheel which extend parallel to the blade angle; the discharge apertures are each provided with an outer boundary starting from the largest circumference of the stationary blade wheel or in direct proximity thereto and discharging into a possibly annularly shaped discharge channel arranged axially adjacent the working circulation.

Abstract: A power train having an engine, a retarder and a transmission and controls to manually control the retarder and an engine overspeed responsive control operative to shorten a link in the manual control to move the retarder control valve to automatically apply the retarder in response to engine overspeed. An air cylinder in a link of the retarder apply linkage is actuated by vehicle air brake pressure controlled by a transmission input or engine speed governor to apply the retarder and prevent engine speed above a predetermined value and thus limit vehicle speed. When the retarder apply air cylinder shortens the link, the retarder apply pedal engages the brake off stop to provide the reaction to move the retarder valve.

Abstract: A device for regulating the driving torque and energy absorption in hydraulic energy absorbing means such as employed in aircraft arresting mechanisms, consisting in a liquid reservoir housing in which a bladed rotor is rotative, said rotor having its blades surrounded by fixed vanes of a curvature different from that of the blades of the rotor. A ring is mounted above the blades, the ring having an annular groove or channel in which a channel-shaped capsule is positioned, the capsule being adjustable up or down in the groove, a rotative adjustment ring is mounted on a part of the housing and an outer ring carries rods that enter the housing to contact with the capsule, and the outer ring has parts engaging in guide means on the inner ring, whereby rotative adjustment of the inner ring causes raising or lowering of the capsule with respect to the rotor blades.