Patents Assigned to Alfred Teves GmbH
  • Process for the manufacture of a piston/cylinder assembly
    Patent number: 5131144
    Abstract: A process for the manufacture of a master cylinder for hydraulic brake units of automotive vehicles. The starting material is a pasty material which is between solid and liquid. In the course of the casting procedure, thin material wall thicknesses are created in the regions of intended openings of the master cylinder, such as the breather bore (14) and the intake bore (5). The floating membrane (12) which forms during the casting process is removed by mechanical machining to open the duct which functions as the intake bore. The breather bore (14) which functions as the compensation bore is formed by a stamping operation.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: July 21, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Kurt Saalbach, Heinz-Juergen Preuss, Klaus Bergelin
  • Anti-lock hydraulic brake system with hydraulically controlled inlet valve
    Patent number: 5129714
    Abstract: An anti-lock hydraulic brake system is provided which includes a master brake cylinder (2) and a pump (16) and an inlet valve (12) and an outlet valve (14). The inlet valve (12) is a minimum element whose control compartments (12, 22) are interconnected through a throttle (19). Depending on the position of a piston (20), either the brake line (8) or the return line (13) is opened. The pump (16) feeds the brake lines during a brake slip control operation. When the outlet valve (14) is opened, a pressure gradient is caused at the throttle (19) which results in that the operating piston (20) is displaced. As a result, the brake line (8) is closed and the return line (13) is opened, thereby permitting pressure fluid to discharge from the wheel brake (10) into the supply reservoir (15).
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: July 14, 1992
    Assignee: Alfred Teves GmbH
    Inventor: Michael Latarnik
  • Valve block assembly
    Patent number: 5127440
    Abstract: A valve block assembly for an anti-lock assembly for anti-lock system for automotive vehicles. The assembly comprises a valve-receiving member (1) and a cover (2). The cover is made of plastics into which conducting paths are injection-molded. The conducting paths are part of a stamping (13). When the cover (2) is mounted on the valve-receiving member (1), all contacts are established between the pins (18) of the coils of the solenoid valves (19), on the one hand, and the erected ends (15) of the stamping (13), on the other hand. The instant invention accomplishes considerable simplification of the assembly.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: July 7, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Joachim Maas, Erhard Beck, Winfried Schuetzeichel, Axel Hinz
  • Anti-lock brake system for automotive vehicles
    Patent number: 5127713
    Abstract: An anti-lock brake system for automotive vehicles comprising a master cylinder (1), a device for modulating the pressure supplied to the wheel brakes, at least one control device (2), at least one monitoring device and a device for pressure reduction provided in the rear-axle brake circuit (7). In order to maximally utilize the share the rear-wheel brakes have in the total brake force, without causing an unstable vehicle condition thereby, braking pressure reduction is effected only upon failure of the anti-lock device.
    Type: Grant
    Filed: December 7, 1988
    Date of Patent: July 7, 1992
    Assignee: Alfred Teves GmbH
    Inventor: Alfred Birkenbach
  • Transducer for an electromotively driven power steering system
    Patent number: 5123279
    Abstract: A transducer for an electromotively driven automotive vehicle power steering system is substantially composed of a compact sensor carrier (6) which can be plugged into a corresponding opening of a steering housing (1). Semiconductor sensor elements (S1, S2) are arranged on the side of the sensor carrier (6) projecting into the interior of the steering housing (1). Outwardly, the sensor carrier (6) ends in plug contacts (12) serving to supply the sensor signals via a corresponding counter-plug to the analyzing electronics. The compact transducer which is retained in the steering housing (1) e.g. by means of steel stop springs (13) is apt for measuring the steering angle, the steering velocity and steering acceleration as well as for measuring the steering torque.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: June 23, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Nabil Henein, Wilhelm Beer, Juergen Balz
  • Piston-cylinder assembly of plastic material
    Patent number: 5121686
    Abstract: A clutch master assembly made of plastic material for an automotive vehicle. The assembly a plastic cylinder housing (1) and a piston (2) and a plastic bushing (3). The plastic bushing is arranged to allow it to be screwed in by means of a thread portion (4) which is located in the housing. By the screwing-in of the bushing a grooved disc (5) and a grooved cup (6) are secured in the assembly. The grooved cup is furnished with knobs (21, 22, 23) which exert a force in axial direction on the arrangement consisting of the grooved cup (6) and the grooved disc (5). The piston-side enlarged end of the piston rod (31, 104) is secured within the piston (2, 103) by a back injection.
    Type: Grant
    Filed: January 9, 1990
    Date of Patent: June 16, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Juergen Schonlau, Alfred Birkenbach, Ralf Harth, Wolfgang Ritter
  • Spot type disc brake
    Patent number: 5113978
    Abstract: This invention relates to a spot-type disc brake, in particular for automotive vehicles, with a housing straddles a brake disc in a U-shaped manner and has a housing bridge, a first housing leg having a piston-and-cylinder unit, and a second, external housing leg, with a first brake shoe which has a carrier plate and is arranged on the first, piston-side leg, with a second brake shoe which has a carrier plate and is arranged on the second, external housing leg and supports the housing radially relative to the brake disc's axis and with projections on the carrier plate which supports the brake shoe in the radial direction and in the circumferential direction. According to this invention, the projections on the carrier plate of the brake shoe are arranged outside the circumference of the brake disc.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: May 19, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Rolf Weiler, Wolfgang Schiel, Rainer Bretzler
  • Travel sensor for determining the position of a member such as a brake pedal
    Patent number: 5115186
    Abstract: A travel sensor for measuring mechanical quantities of motion, in particular for determining the brake pedal position, comprising a transmission unit axially slidable in a housing and comprising a measuring apparatus for generating an electric signal representative of the travel of the transmission unit. The transmission unit is formed of two mechanical transmissions elements (12, 13 and 3, 6, respectively) corresponding with each other and effecting a reduction of the introduced quantity of motions that the test signal is tapped by a reduced test travel. This provides a travel sensor of particularly short dimensions which permits to use of Hall-effect sensors.
    Type: Grant
    Filed: April 23, 1990
    Date of Patent: May 19, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Hans-Dieter Reinartz, Helmut Steffes, Juergen Rausch, Stefan Risch
  • Spot-type disc brake
    Patent number: 5111914
    Abstract: A spot-type disc brake for automotive vehicles, with a housing and with a brake carrier provided with two arms which are positioned in radial direction relative to the brake disc at a distance from each other and with a brake lining slidably guided at the arms in the direction of brake application and furnished with a carrier plate. The brake lining is connected to the arms in a positive locking fit in the direction of the circumference of the brake disc in such a manner that the frictional force occurring at the brake lining is transmitted to both arms at least in the presence of more elevated brake application forces. The arms with surfaces facing each other form a guide which is open in radially outward direction and serves to accommodate and guide the brake shoe. One arm in the vicinity of the brake disc is formed with a groove extending in the direction of brake application and is open outwardly.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: May 12, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Rudolf Thiel, Ulrich Klimt, Georg Halasy-Wimmer
  • Device for adapting the characteristic curve of a hydraulic accumulator to the characteristic curve of a consumer
    Patent number: 5111659
    Abstract: In order to avoid energy losses, particularly in the case of actuating operations characterized by energetic cycles, it is suggested to insert a double-lever cam-and-roller transmission mechanism between a hydraulic accumulator and a hydraulic pressure consumer which mechanism has the effect that the accumulator pressure and the consumer pressure are always balanced. The consumer is therefore actuatable by means of slight control forces, the energy used thus remaining at a minimum. Thus, only the slight actuating energy of the control forces and the unavoidable hysteresis loss of the system need to be compensated for.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: May 12, 1992
    Assignee: Alfred Teves GmbH
    Inventor: Hans-Christof Klein
  • Controllable vibration damper
    Patent number: 5107969
    Abstract: A controllable vibration damper for automotive vehicles is disclosed having a damping piston which is axially slidably and sealedly guided in a damping tube, and which subdivides the damping tube filled with a damping medium into two working chambers. The connection between the two working chambers is provided with at least one non-regulated first valve and at least one controllable second valve, which valves are arranged acting hydraulically in parallel in respect to one another. In order to be able to regulate the effective damping force continuously in wide ranges, for the adjustment of damping hardness, the controllable valve will periodically open and close in rapid sequence in dependence upon pulsed control signals.
    Type: Grant
    Filed: September 1, 1989
    Date of Patent: April 28, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Hans-Christof Klein, Peter Lohberg
  • Mechanically controlled power booster
    Patent number: 5105722
    Abstract: In order to eliminate the noises caused on operation of a vacuum brake power booster, a radially outwardly extending air-conducting surface (26), which tapers toward a poppet valve member (7) closing a sealing seat (19) and which is opposite to the channel (25) on actuation, is adjacent to the radially outwardly disposed area of the sealing seat (19) designed on a valve piston (10), the sealing seat being released on displacement of the valve piston (10) and permitting inflow of the atmospheric air into the working chamber (3) of the booster via a radially extending channel (25).
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: April 21, 1992
    Assignee: Alfred Teves GmbH
    Inventor: Klaus Lind
  • Brake system with anti-lock control for all-wheel driven automotive vehicles
    Patent number: 5105903
    Abstract: A brake system with electronic anti-lock control for all-wheel driven automotive vehicles possesses two control channels, to which diagonally each one front wheel (VR or VL) and one rear wheel (HL or HR) are connected. Rotational speed sensors (24, 25) are provided at the front wheels only. During anti-lock or slip control, front wheels and rear wheels are coupled such that a brake torque is transmittable at least from the rear wheels to the front wheels. Preferably, brake torques are transmitted also from the front axle to the rear axle. For coupling, a differential lock (6) is arranged in the distribution differential (3) which lock is controllable by a signal of the anti-lock control system.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: April 21, 1992
    Assignee: Alfred Teves GmbH
    Inventor: Gunther Buschmann
  • Arrangement for the detachable coupling of a brake cable line
    Patent number: 5105682
    Abstract: An arrangement is disclosed for the detachable coupling connection of a brake cable line (2) to a fixed buffer block (8) spaced from an expanding lever brake (4), an encasing pipe assembly (5) surround the cable line (21). The encasing pipe assembly (5) may be two-part construction, a cable socket (6) and a thrust bushing (7) being adapted to be telescoped one over the other and secured together to be clamped to the buffer block (8). A fixing element (13) is attached to the cable (2) and a sliding bushing is fit over the fixing element, on interposed spring (21) and seal (27) fit over the cable (2) and extending between the buffer block (8) and lever (4). A number of encasing pipe assembly designs are described.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: April 21, 1992
    Assignee: Alfred Teves GmbH
    Inventor: Hubert Jung
  • Power drive system for sliding door
    Patent number: 5105131
    Abstract: A power drive system for a sliding door, such as those employed on van type vehicles, enables a positive drive powered operation of the door by a control switch remote from the door and a programmed electronic control unit while accommodating manual operation of the door without mechanical interference or resistance from the drive or altering of the drive control program. A push/pull cable connected to the door is in positive meshed engagement at all times with a rotary drive gear whose rotative displacement from a rest position is continuously transmitted to the electronic control unit as a door position input signal. During powered operation of the door, the control unit is programmed to actuate or control a reversible drive motor or associated devices when the door is at selected positions along its path of movement.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: April 14, 1992
    Assignee: Alfred Teves GmbH
    Inventor: William W. Schap
  • Coupler particularly suitable for use as a fuel sender coupling device
    Patent number: 5102313
    Abstract: A coupler for connecting the confronting ends of two fluid lines. The coupler includes a coupler housing having a generally tubular body extending along a longitudinal axis. The body includes an opening at a first end thereof for receiving a first tube in the body and an opening at a second end thereof for receiving a second tube in the body. Seals are provided for sealing engaging an end portion of the first tube within the body and for sealingly engaging an end portion of the second tube within the body. A clip extends radially inwardly from a slot in the body for engaging the first tube to retain the first tube within the body and to limit the longitudinal movement of the first tube into the body. The body includes a frangible neck portion intermediate the openings at the ends of the body for separating the first and second tubes by shearing the body at its neck portion.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: April 7, 1992
    Assignee: Alfred Teves GmbH
    Inventor: George Szabo
  • Process of and apparatus for controlling an anti-locking hydraulic brake system
    Patent number: 5100210
    Abstract: An anti-locking hydraulic brake system is provided, having a master brake cylinder, a pump, at least one wheel brake cylinder and a reservoir. Inlet and outlet valves are controlled to determine the rate of flow through sections of the pressure conduits. By influencing the rate of flow, a corresponding passage flow is supplied to or discharged from the master brake cylinder and the wheel brake cylinder, respectively, thereby permitting positioning of the master brake cylinder piston and control of the wheel rotating pattern.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: March 31, 1992
    Assignee: Alfred Teves GmbH
    Inventor: Gunther Buschmann
  • Disc brake
    Patent number: 5099961
    Abstract: An improved disc brake which avoids brake noises. Mass is added to one or both of the brake housing and the brake carrier to preclude the natural frequencies of several components from coinciding, thereby preventing noise in that resonant frequency.
    Type: Grant
    Filed: January 19, 1990
    Date of Patent: March 31, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Ludwig Dreilich, Thomas Egerer, Karl-Fr. Woersdorfer
  • Anti-locking hydraulic brake system
    Patent number: 5098173
    Abstract: The pressure in the wheel brake of the system is controlled by an inlet valve 15 and an outlet valve 17 activated in response to the system controls. Fluid pressure from the pumps 13, is supplied to the wheel brake through the inlet valve 15, and discharged from the wheel brake through the outlet valve 17. By inserting a differential pressure limiter valve ahead of the inlet valve 15, the noise generated by the inlet valve is substantially reduced. A valve body 45 carries both the limiter valve seat and a discharge check valve seat, and respective closure balls 61, 62.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: March 24, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Erhard Beck, Harald Luetteke
  • Circuit configuration for monitoring the final stages of a plurality of valves
    Patent number: 5099198
    Abstract: A circuit configuration for monitoring the final stages of a plurality of valves, particularly the power transistors (LT1-LT4) and their circuitry, for defects as well as for leakage currents or by-path currents comprises a comparator circuit (1), an OR-link (2) and of a further comparator element (XOR4). By way of the monitoring circuit, the actuation connections (S1-S4) of electromagnetically operable valves are connected to a sole output (A3). By applying short test pulses to the actuation inputs (E1-E4) of the final stages (LT1-LT4) and by comparing the signal variation at the output (A3) with the test pulse variation defects, leakage currents and the like are detected.
    Type: Grant
    Filed: July 27, 1990
    Date of Patent: March 24, 1992
    Assignee: Alfred Teves GmbH
    Inventors: Hans-Wilhelm Bleckmann, Heinz Loreck, Michael Zydek