Abstract: A power seat adjuster includes first and second spaced track assemblies, each formed of an upper track slidably mounted on a lower track anchored to a vehicle floor. A drive block disposed in each upper track rotatably engages a lead screw bi-directionally rotated by a drive transmission coupled to the output shaft of a horizontal drive motor mounted between the track assemblies. A drive block mounting bracket supports each drive block and has a leg extending through an elongated slot in the upper track and an aperture in the lower tracks to a fixed connection to the lower track. A seat support plate is disposed adjacent each upper track and is connected to a seat. A pair of vertical drive motors are each coupled through a lead screw, a rotatable shaft and pivot links to opposite ends of the seat support plates for selectively varying the vertical position of the ends of the seat support plates with respect to the track assemblies.

Abstract: A pressure control valve is disclosed comprising a valve tappet (1) guided in a valve housing (3) and accommodating a compression spring (4), with a valve closure member (10) on one end of the valve tappet (1) and mating with a valve seat (9) establishing a connection between a pressure supply port (11) that emanates from a pressure fluid source and a pressure return channels (12) once the pressure attains a specific preset desired valve. In order to diminish noise, at least one friction element (2) is engagement with the valve tappet (1) movable to abut on radial friction surfaces of the valve housing (3) and/or the valve tappet (1).

Abstract: A hydraulic anti-locking brake unit is presented in which the brake line is shut off by an isolating valve 20 during a control action. For the reduction of the pressure, the outlet valve 7 is opened, so that the pump 14 delivers hydraulic fluid out of the wheel brake into the high-pressure accumulator 19. For a renewed pressure build-up, the inlet valve 6 is opened, so that hydraulic fluid flow is directed out of the high pressure accumulator 19 to the wheel brake. In order to be able to utilize a high pressure accumulator having a low receiving capacity, various valving arrangements are disclosed to direct excess flow from the pump either to the master cylinder or a low pressure accumulator.

Abstract: Apparatus for actuating a hydraulic power steering system for automotive vehicles, wherein the steering shaft (1 ) is allowed to roll off on the gear rack (3) to a small degree to actuate the steering valve. To enable this rolling motion, the steering shaft (1 ) is supported in a sleeve (9) which, in turn, is supported through needle bearings (10) so as to be rotatable in relation to the steering gear housing (4). To prevent inadvertent steering maneuvers in the event of partial or complete system failure, the needle bearing axis is arranged in parallel to the center line of the steering shaft (1) as well as in one plane with the steering shaft and with the point of force transmission between pinion (2) and gear rack (3). The needle bearing axis is radially outward from the central point of the steering shaft axis than the point of force transmission. A captivated spring (24) is provided to retain the valve slide (19) in its neutral position.

Abstract: A hydraulic brake system is described including a brake slip and/or traction slip control, wherein a pump required herefor is connected in series into the brake conduit through which, in a normal deceleration process, pressure fluid is displaced from the master brake cylinder to the wheel brake. The pump is mounted so that the intake side thereof is in communication with the master brake cylinder and the pressure side thereof is in communication with the wheel brake. Upon commencement of a slip control, the pump drive is turned on. As the master cylinder pressure prevails on the intake side of the pump the pump can very quickly reach the full discharge capacity, thereby enhancing control response of the slip. Moreover, the risk of air being sucked into the brake system is reduced.

Abstract: A multi-layer tube suitable for use on motor vehicles composed of a cylindrical wall having an outer surface, and an inner surface essentially parallel to the outer surface. The cylindrical wall has a first region having an essentially uniform cross-sectional diameter and a second region which has a cross-sectional diameter differing from the essentially uniform cross-sectional diameter of the first region. The second region has at least one convolution contiguously adjacent to the cylindrical wall of the first region.

Abstract: A floating-caliper spot-type disc brake is disclosed having an arrangement for actively retracting the indirectly actuated external brake shoe to create a clearance with the brake disc. Elastic spring elements (24, 34, 38, 45) engage the external brake shoe (10) and the carrier arms (2, 3) of the brake carrier (1) and which are elastically tensioned by actuation of the brake to allow a slight retraction of the external brake shoe when the elements relax as the brake is released. The spring elements are mounted to allow a frictional grip to be overcome to shift the relative relaxed position of the spring element and external brake shoe as the brake lining wears, so that a constant disc clearance is maintained.

Abstract: A hydraulic anti-lock brake system is disclosed in which the pressure in the wheel brakes can be regulated by means of an inlet valve and an outlet valve in response to the wheel rotational pattern. The wheel brake is supplied with pressure fluid out of the pumps through the inlet valve, and pressurized fluid is taken therefrom through the outlet valve. A differential pressure limiter (18) in front of the inlet valve (15) limits the difference in pressure allowed to build up across the inlet valve by closing a valve until a sufficient pressure build up occurs on the wheel brake. This considerably decreases the noise developed during valve operation. A pressure relief valve (30) insures that an evenly high pressure build-up takes place when the inlet valve (15) is closed by opening when a predetermined pressure difference develops across the inlet valve to allow a higher wheel brake pressure to equalize with the pressure upstream from the inlet valve.

Abstract: Steering column switches for motor vehicles having a switch housing and an operating lever are known, which operating lever is swivellably mounted about an axis in the switch housing and which comprises a control grip rotatable about an axis of rotation extending in the longitudinal direction of the operating lever and which control grip is movable between at least two operating positions, and a switching rod at least substantially aligned in the longitudinal direction of the operating lever and substantially rotatable about the longitudinal axis via the control grip and via which switching rod at least one electric contact accommodated in the switch housing is movable. In most cases the motorcar manufacturers desire particular angles of rotation between the individual operating positions of the control grip. These angles of rotation are not always favorable for operating the electric contact.

Abstract: An anti-locking hydraulic brake system in which the pedal is brought into a variable position during a brake pressure control action. A correcting variable is determined in such a way that any pressure rating in the power chamber is correlated with a position of the power piston, the correlation between the pressure and the position roughly corresponding to the ratio of pressure and position during a noncontrolled braking action.

Abstract: In a hydraulic brake system for automotive vehicles with an electronically controlled brake force distribution and with anti-lock control, the rear-wheel brakes are connected via inlet valves (5, 7) closed in their inactive position. Placed in parallel to these valves is an arrangement (13, 14; 13', 14') which is substantially composed of the series connection of a brake force regulator (17, 18, 17', 18') with a throttle (15, 16) or a multiple-way valve (21, 22) which is open in its inactive position.

Abstract: A circuit configuration for editing, or processing the output signal of a speed sensor (5) includes a trigger circuit (1, 22), the changeover points or "hysteresis" of which are controllable, with the circuit configuration being furnished with circuits for determining the coupling factor (k), and with circuits for adjusting the hysteresis in response to the coupling factor. The coupling factor (k)--multiplied by the frequency of the sensor signal corresponding to the speed--forms the amplitude of the sensor output signal. With the coupling factor (k) being high, the hysteresis will be high, while it will be low with a low coupling factor.

Abstract: A wiper blade for a windshield wiper system of a motor vehicle is described, in which wiper blade a pivot pin, that is cylindrical all along its length, is non-rotatably fixed onto a secondary yoke and engages into bearing bushes by way of its ends, which bearing bushes are non-rotatably fixed into the side walls of a primary yoke. This articulated connection is advantageous with respect to corrosional behaviour and thus with respect to the lifetime in comparison to known articulated connections with an articulated rivet that is non-rotatably connected with the primary yoke.

Abstract: A circuit configuration for a brake system with anti-lock control and/or traction slip control including circuits (4) for improving the control during cornering. In the presence of a wheel rotational behavior typical of cornering when during a control action the wheel slip, that means the deviation of the wheel speed from the vehicle reference speed, exceeds the slip threshold (SO), this wheel rotational behavior lasting despite reduction of the braking pressure and the deceleration-responsive/acceleration-responsive control thresholds not being attained, the wheel slip is augmented by an offset (.DELTA.SO) for an invariably preset period of time or a period of time which is dependent on the further wheel rotational behavior, on the braking pressure variation and/or other control criteria.

Abstract: A circuit configuration for a brake system with anti-lock control and traction slip control comprising, wheel sensors for generating electric signals representing the wheel rotational behavior and circuits for the cornering identification is provided such that lateral reference speeds (13, 14) are formed by virtue of selection circuits (8, 9) which select leading wheel speed according to specific criteria, and by virtue of a filter means (10, 11) whose time constants (12) are variable. A difference signal (DVS) is formed of the lateral references speeds (SRG.sub.L, SRG.sub.R), the magnitude of which is variable by inverse feedback. This difference signal (DVS) serves to actuate an adaptation circuit (18) as a function of the vehicle reference speed (V.sub.REF). The adaptation circuit influences on the control thresholds of the anti-lock control and traction slip control to adapt the control to the particularities of cornering.

Abstract: The circuit configuration for a brake system having an anti-locking control generates pulse-type brake pressure control signals. For pressure rebuild-up after a pressure decrease, brake pressure is applied first at a steep and subsequently at a flatter gradient, this being achieved by a variable pulse (P1) and by short fixed pulses (P2) succeeding one another at a large interval. Circuits are provided rendering dependent the pulse and pulse break times (T.sub.1, T.sub.2, T.sub.k) determining the pressure build-upon the duration of the pressure build-up (T.sub.1) during the steep-rise build-up in the preceding cycle,on the duration (T.sub.1 +nT.sub.2) of the entire pressure build-up in the preceding cycle, andon the duration (T.sub.o) of the preceding pressure decrease, with the pulse times being so dimensionedthat, at a constant coefficient of friction and at a constant static pressure, the locking limit of the wheel is rereached after a predetermined period of time or after a predetermined pulse number.

Abstract: A vacuum brake power booster (1) has an electric travel sensor (3) for monitoring the position of a movable wall (4) furnishing the boosting power of the brake power booster. The travel sensor (3) is mounted by a sensor receptacle (2) which is made of plastic material and which is sealed off with respect to the booster housing (10) by means of a seal. In order to assure effective sealing by creating a constant degree of compression of the seal (7) despite different material thicknesses of the booster housing (10), angled tabs (12) are formed against which locking projections (11) are abutted.

Abstract: A non-involute gear used in a gear pair. A first gear has a plurality of radially extending, circumferentially spaced teeth, each with a generally cylindrical, arcuate shaped end surface. A second gear has a plurality of spaced, non-involute shaped teeth. Each tooth of the second gear is formed with opposed base faces disposed at an identical radius. A pair of flats extend in parallel from the ends of each circular base face and terminate in inwardly extending, end portions extending from the flats to the top land of each gear tooth. A tooth space is formed between two adjacent non-involute gear teeth having a semi-circular base portion formed by the opposed circular base faces of two adjacent gear teeth and two parallel flat portions formed by the pair of parallel flats extending from the semi-circular base portion which combine to form a generally U-shaped space for receiving a gear tooth on the first gear.

Abstract: A vacuum brake power booster is described wherein the return movement of a valve piston actuating a control valve is limited by a U-shaped element (17) slidable into a control housing (11). In order to improve the ventilation of the working chamber of the brake power booster initiated on actuation and to shorten the booster's response time, exit areas (42, 43, 44, 45) of ventilation ducts (38, 39, 40, 41) permitting an air flow into the working chamber (3) are formed radially outwardly of an area in the control housing (11) between the arms of the U-shaped element (17), the exit areas being confined by the outside walls (34, 35, 36, 37, 46, 47, 48, 49) of air evacuation ducts (28, 29, 30, 31) interconnecting the working chamber (3) and a vacuum chamber(4).

Abstract: A spot-type disc brake in which a two part brake housing forms a central radial cavity open at the outside which allows the brake shoes to be removed through the cavity without disassembly of the housing. The brake shoes are engaged by surfaces on short height projection pairs protruding into the cavity from either side, the surfaces machined with a radiused shape concentric with the actuator cylinder bores to facilitate manufacture. The short height allows the radiused shape without preventing removal of the brake shoes. In a first embodiment, the projections are also formed with outer tangential surfaces, with surfaces on the brake shoes urged thereagainst with a retained spring. In a second embodiment, a holding pin extends across the central cavity and through bores at the outside of each brake shoe, a retainer spring engaged with the holding pin and brake shoes.