Abstract: A pressure control valve is disclosed including a housing, a valve seat, a valve closure member in the form of a ball loaded by a valve spring in a closing direction and controlling the communication between an inlet and an outlet of a pressure medium. So as to provide a pressure control valve which is simple in construction and low-cost manufacture and which is characterized by minimal noise formation a spring loaded guide element at least partially surrounds the valve closure member and axially and radially guides the valve ball, acted upon by a second spring.

Abstract: Disclosed is a brake system wherein the wheel brake is hydraulically connected with a relief chamber of periodically variable volume. A valve 11 controlled by control electronics is switched to connect the chamber to either the wheel brake or a reservoir synchronously to the direction of movement of a piston in the relief chamber to either increase or decrease pressure at the brake for the purpose of antilock and slip control of the brake.

Abstract: In a brake system for automotive vehicles comprising a master cylinder, wheel cylinders and a device for anti-lock control, the piston of the master cylinder is positioned in its nominal position by the variable volume of delivery of a pressure fluid source, in particular, a pump. The actual position of the piston is determined by a sensing device which is mounted on axially movable parts of the tandem master cylinder, booster, pedal assembly or other elements. The volume of delivery of the pump is adjusted so as to cause the piston of the master cylinder and, thus, the brake pedal to assume the desired position. For this purpose, the pump is connected with the pressure chamber of the master cylinder. Advantageously, it will be accomplished thereby that the brake pedal will not depress through its full travel when, during the control mode, more pressure fluid is removed from the hydraulic system, in particular from the pressure chamber of the master cylinder than the pressure fluid pump is able to deliver.

Abstract: An anti-lock hydraulic brake system which includes a brake pressure generator composed of a master cylinder, a brake power booster inserted upstream thereof and a pressure modulator interposed between the master cylinder and the brake power booster. A resetting unit is formed by supplementing the pressure modulator with a valve assembly which connects a resetting chamber of the pressure modulator to either a pressure-compensating reservoir or an auxiliary-pressure source. The braking pressure in the wheel brakes is controlled, according to a time-multiplex method, by wheel valves inserted into the pressure-fluid conduits and by the pressure modulator. In order to check the operability of the brake and of the anti-lock control system, a pressure switch is connected to the pressure modulator and a test circuit is provided which, at predetermined points of time, initiates a test cycle, actuates the valves and compares the valves' operation with the reaction of the pressure switch.

Abstract: A brake system with slip control provided for vehicles with front-wheel or rear-wheel drive comprises two hydraulically isolated brake circuits (I, II) to which in each case the wheel brake (31 to 34) of one front wheel (VL, VR) and one rear wheel (HL, HR) is connected. By use of a pressure-retention valve (51, 52) which is inserted in each case into the line branch (49, 50) connecting the associated main line (53, 54) to the wheel brake (31, 33) of the driven axle (HL, HR), the brake force build-up at the driven axle (HL, HR) is delayed compared to the non-driven vehicle axle (VL, VR) during a braking action. Accordingly, brake force can be attained at both vehicle axles (VL, VR and HL, HR) in the presence of low road adherence values. In vehicles equipped with drum brakes at the rear axle, the effect desired can also be attained by arranging for specially adapted barke-shoe return springs instead of pressure-retention or differential-pressure valves.

Abstract: A braking pressure modulator is disclosed including a gear unit which is interposed between its actuator and a volume-receiving unit and whose transmission varies in dependence upon the stroke of a displacement member or plunger in the volume-receiving unit. To this end, the gear unit is designed such that the hydraulic forces urging the displacement member or plunger in a shift-out direction remain in balance with a constant predefined adjusting force of the actuator when the displacement member or plunger is shifted out after attainment of a predetermined maximum pressure in the volume-receiving unit and with a hydraulic separating valve closed. To control the plunger strokes, only small changes in the adjusting force of the actuator are required. In one embodiment, the actuator of the braking pressure modulator is an electric motor.

Abstract: An actuating device for a disc brake, in particular for automotive vehicles, has a rotatably supported actuating member and a transforming device for transforming a rotary motion into an axial motion. A part of the transforming device may be held by a holding element whereby the transforming device may be non-rotatable and axially displaceable. The holding element has a rotatably supported part fixed to the brake housing. Friction-reducing means is provided between the rotatable part and the element fixed to the housing.

Abstract: The hydraulic brake system having at least one wheel brake is adapted to be pressurized by a master brake cylinder actuated by a hydraulic power booster. An auxiliary pressure is adjustable in a pressure chamber of the hydraulic power booster by means of a brake valve. Interposed between an auxiliary pressure source and the brake valve is a pressure-reducing valve that is controllable by the auxiliary pressure and contains a valve controlling a passageway, the valve being acted upon by the auxiliary pressure to open the passageway. To simplify the construction of the pressure-reducing valve, the closure member of the valve is exposed to the reduced pressure in the pressure-reducing valve such that a force related to the valve seat surface will be exerted on the closure member in the closing direction of the passageway of the pressure-reducing valve.

Abstract: A slip-controlled brake system is disclosed having a hydraulic power booster and a master cylinder arranged downstream of the power booster, wherein the pressure chamber of the power booster can be acted upon by an external pressure depending on the position of a pedal-actuatable brake valve, and wherein a fast-fill cylinder is provided which can be acted upon by the dynamic pressure and through which additional pressure fluid can be supplied to the brake circuits of the master cylinder. The fast-fill cylinder is equipped with a three-step bore wherein a piston with three shoulders is longitudinally displaceably arranged. A chamber in front of the large drive surface of the piston is connected to the dynamic brake circuit through a pressure fluid line and a chamber in front of an end face of the small step is connected to a static brake circuit through a second pressure fluid line.

Abstract: An automotive vehicle braking device comprises a hydraulic master cylinder (11) having at least one piston (21) for pressurization of the wheel cylinders connected thereto with hydraulic pressure and also having a vacuum brake force booster (12) inserted between the brake pedal (52) and the piston (21). The master cylinder (11) is integrated in the construction of the vacuum brake force booster (12).

Abstract: In a two-stage reaction device for vacuum brake boosters, the clearance at the piston rod will be reduced by the piston rod acting directly on the valve piston which comprises a head portion connected via a neck portion at its end close to the vacuum chamber. The head portion and the rear end surface of the valve piston contain abutment surfaces which cooperate with levers. The levers, in turn, are moved by the push rod coupled to the master cylinder via a fork-like shaped pressure member with prong-shaped attachments. In this arrangement, one end of each lever is held resiliently between a supporting ring and a spring plate, with the supporting ring including edges about which the levers are tiltable when the pressure member acts on the other ends of the levers.

Abstract: A brake system for vehicles with electronic anti-lock control and traction slip control is equipped with a dual-circuit braking pressure generator (1) with preferably diagonal brake-circuit allotment. In the control phases, an auxiliary-pressure supply system (5), instead of the braking pressure generator (1), is hydraulically connected to the wheel brakes. Each brake circuit (I, II) contains, in the pressure-fluid conduits from the braking pressure generator to the wheel brakes, one joint multi-directional control valve (10, 11) and, connected in series thereto, individual wheel multi-directional control valves (12 to 15) which are likewise open in their inoperative position. In lieu of the braking pressure generator, the auxiliary-pressure supply system (5)--which generates pressure proportional to the pedal force during anti-lock control, while it generates uncontrolled pressure during traction slip control--is connected to the wheel brakes during the control phases.

Abstract: A spot-type disc brake with a floating-caliper comprises a brake support member and a brake caliper that is arranged at the wheel axle in a manner slidable parallel to the brake disc axis by a single guide element (5,6) includes brake shoes which are replaceable tangentially relative to the brake disc. The brake support member is constructed in the shape of a retaining element which is arranged on one side of the brake disc parallel to the disc and which may be constructed integrally with the wheel axle. The brake shoes are retained either on the disc entry side in the brake caliper (2) or on the disc exit side at the brake support member (1) or in the brake caliper by retaining elements. On the side opposite to the retaining elements, i.e. on the disc entry side or on the disc exit side, the brake shoes are supported in the brake caliper.

Abstract: A vane-type motor is disclosed including a rotor disposed in a housing having a plurality of cam rings surrounding the rotor, which cam rings are displaceable relative to one another in the circumferential direction. Vanes associated with the cam rings subdivide a work chamber provided between the rotor and the cam rings into work cells and side plates laterally confine the work chamber. An inlet channel supplies pressure fluid to the work chamber and a discharge channel provides for discharge of the pressure fluid from the work chamber. Control channels are provided to preclude pressure impacts and noises with the cam ring displaced. The control channels terminate in the work chamber and connect the work chamber to the inlet channel. The rotor forms a control element for the control channels.

Abstract: A hydraulic brake system for automotive vehicles with a master brake cylinder (1) connected to an unpressurized reservoir and with a brake line (13, 14) connected to a working chamber (4, 5) of the master brake cylinder and leading to pressure control valves of a brake slip control device (40). The pressure control valves are followed by at least one wheel brake (18, 19) with the working chamber (4, 5) of the master brake cylinder (1) being connectable to a pressure medium source (29) upon the start of the brake slip control device. To ensure that in brake systems of different vehicle types, the wheel brakes of which have clearances differing in size, the same master brake cylinder can be used without the master brake cylinder having an undesired long pedal travel and thus a great overall length.

Abstract: An electric brake cable tensioning device is disclosed including a planetary gear train driven by a motor driven worm gear and a friction brake for holding a sun gear of the gear train against rotation during torque input. The cable is attached to a planet gear of the gear train which moves around the braked sun gear and pulls the cable in tension. The worm gear and braked sun gear hold the planet gear and cable in the tensioned position. Cable tension is released upon release of the sun gear whereupon the planet gear moves back to the untensioned position.

Abstract: A hydraulic brake system for automotive vehicles has a master brake cylinder (1) operable by a brake pedal, wheel brakes (VL, HR, VR, HL) being connected to said master brake cylinder via brake lines (11, 12), and a hydraulic power booster (22) supplied by a pressure medium source (42) and connected between the brake pedal and the master brake cylinder (1) so as to boost the actuating force. The booster has a booster piston (27) in a booster chamber (28) and the pressurization of said booster piston is controllable by the brake pedal via a control piston (30). For controlling the brake system by means of a brake slip control device the connection from the brake lines (11, 12) to the wheel brakes can be blocked by solenoid valves (13-16). The booster piston (27) is connected with a resetting piston which, for pushing the booster piston back into its rest position, is pressurizable via a resetting valve (46, 53) controllable by the brake slip control device.

Abstract: The present invention relates to a traction slip control device comprising a sensor which responds to a beginning slip condition on at least one of the driving wheels and, connected to the sensor, a control circuit which via an auxiliary drive in the form of a fluid which actuates the throttle valve of the drive engine in the closing sense when the sensor detects a slip condition and feeds a slip signal to the control circuit.

Abstract: A vehicle light including several incandescent lamps which are inserted in sockets of plastic lamp holder by means of the lamp base or cap which forms the connection for the incandescent lamp. A lug is punched from a thin sheet metal billet in one piece with a lead for the respective incandescent lamp and is bent towards the bottom of the socket and squeezed between the base or cap and the socket by a spring.

Abstract: Disclosed is an electromagnetically actuatable three-way/two-position valve for alternatively connecting an outlet connection with a first or a second inlet connection. The valve includes a housing having a cavity which is sealed by means of a cap and within which a magnet winding and a displaceably arranged armature are provided which, upon excitation of the winding, actuates a valve closing body which is preloaded into an inoperative position by means of a return spring supported against the housing. A communication between the first inlet connection and the outlet connection exists in the inoperative position.