Abstract: A hydraulic brake system with slip control comprising a master cylinder (2) pressurizable by a hydraulic power booster (1). A booster sleeve (52) is provided which annularly encloses the booster piston (4), and which is slidably accommodated in the booster housing. The sleeve's end face directed towards the pressure chamber (10) of the booster (1) is applied by the pressure in the pressure chamber (10), while an annular chamber (59) filled with pressure medium and connected to a brake circuit (32) is constituted between the booster sleeve (52) with its head portion (61) and the bore (60) in the booster housing. The booster sleeve (52) is coupled to the booster piston (4) by way of a circlip (53) such that, on movement of the booster piston (4) in the direction of brake actuation, the booster sleeve (52) and the booster piston (4) will displace uniformly.

Abstract: A brake system with hydraulic force boosting comprises a master cylinder (1) and an auxiliary pressure supply system including a hydraulic pump (10), the driving motor (M) of which is actuated when the brake is applied. The pressure in the working chambers (18,19) of the master cylinder (1) results in the re-switching of valve arrangements (2,3) with the result that the controlled auxiliary pressure is applied to the wheel brakes (4-7) in lieu of the master cylinder pressure (1). For pedal travel simulation, a hydraulic cylinder (37) is connected to a work chamber (19), with the piston (38) of the hydraulic cylinder being displaceable against a restoring spring (39) and against the controlled auxiliary pressure. A pressure-controlled multidirectional valve (40) provides for a connection of the auxiliary pressure source.

Abstract: A hydraulic skid-controlled brake system comprising a master cylinder (2) pressurizable by a hydraulic force booster (1). The master cylinder piston (5) is provided as a stepped piston, with the small piston step (14) cooperating with the booster piston (4) traversing an annular chamber (19). The large piston step (15) plunges into the annular chamber (19). When the brakes are applied, the pressure fluid flows from a brake circuit (22, 31) into the annular chamber (19) by way of a first pressure fluid conduit (18, 21) and in which a blocking valve (26) is provided. By way of a second pressure fluid conduit (33, 34, 47, 36) the pressure fluid flows from the annular chamber (19) into an intake reservoir (11) in which a current control valve including a blocking slide (35) is provided. The connection (33) to the annular chamber (19), in the brake releasing position, is closed by the large step (15) of the master cylinder piston (5 ).

Abstract: A vacuum operated brake power booster including a retaining member for securing the edge bead of a moveable wall diaphragm of the booster to the booster control valve is disclosed. The booster includes a casing subdivided into two chambers by a moveable wall having a diaphragm which has an internal edge bead disposed in an annular groove in the control valve housing of the booster. An annular retention ring surrounds the bead of the diaphragm to the outside of the bead and radially retains the edge bead within the control valve housing groove.

Abstract: For attaining an abrupt change in ratio, in a slip-controlled brake system for automotive vehicles, the chamber (11) of a fast-fill cylinder (4) is connected to a plunger chamber (41) of the braking pressure generator (1) which is acted upon by the booster piston (40), while the pressure line (7) leading from the plunger chamber (41) to the fast-fill cylinder (4) contains a pressure-controlled directional control valve (8) governing a pressure-fluid conduit to the pressure-supply reservoir (31). The annular chamber (50) of the fast-fill cylinder (4) is connected by way of a return line (55) to the pressure-supply reservoir (31) and with the prechamber (18) of the master cylinder (15) by way of a pressure line (56), while a pressure-controlled two-way/two-position directional control valve (9) with a non-return valve connected in parallel thereto is arranged in the return line (55).

Abstract: In a power brake booster for an automotive vehicle, with a housing (1, 2) subdivided into two compartments by a partition wall (41), the compartment close to the brake pedal contains a working chamber (25) and a vacuum chamber (33), while the compartment close to the master cylinder contains a working chamber (24) and a vacuum chamber (32), with a longitudinally slidable control housing (4) with valve device (8, 37, 38) being sealably held and guided in a central opening of the partition wall (41), the said control housing incorporating a longitudinal channel, for instance on annular gap (21) which, on the one hand, is via an opening or bore (26) in communication with the one working chamber (24), while, on the other hand, it terminates into a chamber, for example an annular chamber (20), which is connected to the valve chamber (42) behind the valve device (8, 37, 38) and which is connected to the other working chamber (25) via a cross bore (39).

Abstract: A vehicular hydraulic brake system with an anti-locking arrangement, wherein first valve devices (10, 16, 17, 20, 27, 28, 29, 30) are interposed between a master cylinder (3) and brake-actuating member (11, 12, 13, 14) which valve allow interruption of the supply of pressure fluid to the brake-actuating members (11, 12, 13, 14) and to removal of pressure fluid from brake-actuating members (11, 12, 13, 14). The first valve devices (10, 16, 17, 20, 27, 28, 29, 30) are controllable by a slip-monitoring electronics (18) as a function of the wheel rotational behavior, and provision is made of a device for ensuring availability of a minimum stroke of the master cylinder (3) as a reserve.

Abstract: In a reciprocating wiper system for motor vehicles a piston is linearly displaceably guided in a housing and mounted in a bearing which is seated in a receptacle of the housing. A scraper ring and a sealing ring intended to clean the piston are positioned in front of the bearing. The sealing ring and the scraper ring are jointly mounted in the housing with the bearing as a structural unit. In a preferred embodiment the sealing ring and the scraper ring are held on a universal ball joint being part of the bearing.

Abstract: In a brake slip control apparatus fed by auxiliary energy for use in a vehicular hydraulic brake system, copmrising a master cylinder assembly (12) actuatable by the brake pedal, and with auxiliary energy being supplied into the working chamber (16) of the master cylinder, a positioning tube (39) is arranged axially slidable between stops which causes the master cylinder piston (23) to assume a defined position in the event of application with auxiliary energy.

Abstract: A method for controlling an anti-lock brake system for automotive vehicles with all-wheel drive. Electric signals representative of the rotational behavior of the wheels are generated and logically combined. Upon the occurrence of a tendency to lock, the braking pressure is modulated wherein the instantaneous wheel slip, wheel acceleration and wheel deceleration are evaluated as control criteria and the individual wheel speed (v.sub.R) is compared in each case with a vehicle reference speed (v.sub.REF) which serves as a reference value for the modulation of braking pressure. In the event of a wheel rotational behavior that is typical of spinning and that shows in the rise of the vehicle reference speed (v.sub.REF) in excess of the actual vehicle speed (v.sub.

Abstract: An apparatus for monitoring the pressure of an auxiliary energy source (10, 11, 12) of a slip-controlled brake system for motor vehicles comprises at least two switches responding when falling below a pressure limit value(p.sub.1), releasing warning signals and influencing the function of the brake slip control. Through logical operation of the switch functions, failure of a switch (ws1, ws2) will be detected and an error signal derivable therefrom resulting in the partial shut-down or cut-off of the control. The monitoring circuit responds to two different pressure limit values (p.sub.o, p.sub.u). The brake system is partially shut down or cut off by measuring the interval (.DELTA.T) between the response to the upper and lower pressure limit threshold (p.sub.o and p.sub.u, respectively), locking and then switching on the master valves (21, 22), detecting the reaction on turning on again the master valves etc., and by logical operation of the signals.

Abstract: A hydraulic brake system for automotive vehicles with a master brake cylinder and with a hydraulic power booster (1) connected upstream of the master brake cylinder, in which a pressure medium pump (6) drivable by an electric motor (9) is employed for providing auxiliary hydraulic energy. The drive of the pressure medium pump (6) may be switched on by a pressure contact (13) of a pressure accumulator (4), on the one hand, and by a brake pedal contact (11), on the other hand. In the unbraked operation of the automotive vehicle, the pressure medium accumulator is permanently kept on a pressure level sufficient for an initial actuation of the brake. A valve assembly is provided which establishes a hydraulic connection between the outlet of the pressure medium pump (6) and the pressure port of the hydraulic power booster (1).

Abstract: A windshield wiper system includes two windshield wipers of which each is mounted on a separate wiper shaft and may be driven to and fro by a separate motor between an inner reversing position and an outer reversing position, which windshield wipers are at least partially superposed in their inner reversing position and rotate in opposite directions through one wiping cycle. The two windshield wipers are moved without collision even though they wipe an overlapping area. The first windshield wiper is driven by its associated motor with a greater angular velocity of the output shaft than the second windshield wiper is driven by its motor. In addition the first windshield wiper is stopped for a predetermined time in its inner reversing position between two wiping cycles.

Abstract: A spot-type disc brake for automotive vehicles is disclosed including a brake carrier having a fixation section adapted to be affixed to the vehicle, a pair of circumferentially located carrier arms, a brake housing including axially disposed lateral guide attachments and a pair of guide pins extending from opposite sides of the fixation section of the carrier define two guide sections, one each received in openings in a respective one of the guide attachments. One guide pin section of each guide pin is axially offset within its respective guide opening.

Abstract: An inductive pulse generator for converting a rotary movement into a frequency proportional therewith. The pulse generator includes a measuring wheel (1) provided with poles (3) of magnetic material evenly distributed over the circumference of the measuring wheel. The pulse generator further includes a stator (4) provided with a magnetic core (6) with plate-shaped pole shoes (10) in a coil carrier (8) out of which end portions (12) of the pole shoes (10) project. The end portions (12) face the measuring wheel (1). A coil (7) surrounds the magnet core (6), at which coil (7) a pulsating voltage can be picked off with a frequency proportional to the number of revolutions of the measuring wheel (1), outside the area of the pole shoe (10) end portions (12) facing the measuring wheel (1). The thickness of the pole shoes (10) is increased by additional magnetic material (11) so as to increase the pulsating voltage which can be picked off at the coil (7).

Abstract: The mechanical actuating device for a disc brake has an automatic adjusting device to compensate for wear of the brake pads. The actuating device enables an easy resetting of the adjusting device for brake pad replacement and has a compact construction of all parts. The adjusting spindle extends axially through the actuating device and a clutch secures the adjusting spindle against rotation when the adjusting nut is turned to compensate for wear of the brake pads. To reset the adjusting device for brake pad replacement, the adjusting spindle is turned back by a turning tool.

Abstract: A slip-controlled brake system for automotive vehicles comprising two static brake circuits (17, 18) into which a pressure medium is introduceable from a dynamic pressure medium circuit (21, 23) during the control operation, and one dynamic brake circuit (14). Directional control valves (7, 8, 9) are interposed in the brake circuits (14, 17, 18). The directional control valves permit a reduction of the pressure in the wheel brakes and a return flow of the pressure medium to the storage reservoir (3). In addition, two pressure-controlled three-way/two-position valves (40, 40') are interposed in the rear wheel brake circuit (14) between the rear axle regulating valves (6, 9) and the wheel cylinders of the rear wheel brakes (HL, HR). The valves are actuated by the pressure in the front wheel brake circuits (17, 18).

Abstract: A seat recliner is provided comprising a seat back support mounted at a pivot pin to a base frame. A sector gear is affixed to the seat back support and includes an opening through which the pivot pin passes. A first gear set is mounted on a pin in the base frame and includes a first gear meshed with the sector gear and a second gear. A second gear set is also mounted on a pin in the base frame and includes a first gear meshed with the second gear of the first gear set and a second gear. A clutch spool is mounted on a pin in the base frame and includes a gear meshed with the second gear of the second gear set. A coil spring surrounds the clutch spool. When the spring is tensioned, the clutch spool is prevented from rotating and the seat back is held from rotational movement about the pivot pin. A clutch release plate contacts the spring coil in a manner such that a selected movement of the release plate decreases the coil spring tension on the clutch spool.

Abstract: A windshield wiper assembly in addition to carrying the wiper blade, also carries an additional cleaning device which may be a brush, an ice scraper, or an additional blade through which washer fluid may be sprayed. The additional device is coupled with the wiper arm-and-blade assembly by means of a coupling which may be operated by an adjusting element. The additional part is only used, when it is really necessary and, in addition, serves to reduce pressure on the wiper arm-and-blade assembly in the parking position.

Abstract: To modulate the pressure reduction when controlling wheel slip by means of an anti-lock hydraulic brake system, electric signals representative of the rotational behavior of the individual wheels are reconditioned and combined electronically. Upon the occurrence of a tendency to lock, a pressure-reducing valve (17, 17', 19, 19', 21, 21') is actuated pulsewise, and thereby pressure fluid out of the wheel brake cylinder is returned into a supply reservoir (11). When varying the pulse/pulse-pause ratio of the actuating signals (i.sub.AV), additionally the pressure/time characteristic curve of the brake system is taken into consideration by increasing the pulse/pulse-pause ratio after a predetermined period of time, that is time of pressure reduction or number of pulses, with the pressure-reducing signal continuing to exist. The change in the actuating signals (i.sub.AV) for the improvement of the pressure reduction is effected in one or in several steps or quasi-continuously.