Abstract: A shaft-mounted bushing for connecting a rotating member to a shaft. The bushing includes a frame receiving a hub rotatably mounted therein. The hub includes an opening at one end thereof for receiving a shaft from the one end thereof. The hub includes a tapered portion which converges inwardly from the one end of the hub and toward the other end thereof. A sleeve is mounted into the hub from the one end of the hub and between the tapered portion of the hub and the cylindrical shaft. The outer portion of the sleeve converges inwardly from the one end of the hub and engages the hub. The sleeve presents an inward portion which is coaxial with and parallel to the cylindrical shaft for engaging the shaft in force transmitting relation ship therewith. The bushing assembly is completed by drawing the sleeve into the hub by way of a fastener located at the other end of the hub.
Abstract: A system for controlling the start-up sequence of an electric motor includes a contactor relay for supplying polyphase operating voltage to the motor. A plurality of output circuits are respectively coupled between the motor and the relay contacts. Each output circuit is responsive to an output control signal applied to an input thereof for applying the operating voltage to the motor. An acceleration ramp generator is responsive to a motor control circuit which energizes the relay for providing a first signal which gradually rises upon the initial activation thereof. A phase control ramp generator is responsive to the application of the polyphase operating voltage to provide a second signal which decreases from a given level upon the initial application of the operating voltage. A plurality of comparators are provided each comparator having first and second inputs respectively coupled to receive each phase control ramp generator signal and the acceleration ramp generator signal.
Abstract: A receptacle device for removably receiving an supporting an external utilization device such as a rod or a fishing pole. The device includes an generally tubular receptacle body of electrically insulating material extending in a longitudinal direction having a receiving opening at one end thereof. The body includes a support opening the axis of which is parallel to and spaced apart from the axis of the receiving opening. A rigid longitudinally extending support shaft is received within the support opening which rigidly extends away from the receptacle body at the support opening for anchoring the receptacle device into and through an opening of an external surface such as the surface of the earth or the rod holder of a recreational boat.
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.
November 27, 1985
Date of Patent:
March 8, 1988
SWF Auto-Electric GmbH
Bruno Egner-Walter, Eckhardt Schmid, Wolfgang Scholl
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: An adjustable rotary vane pump for changing the direction and rate of fluid flow through the pump. The pump comprises a first pump housing having a generally cylindrical chamber therein along a central axis of the housing. A second housing is provided having a second chamber therein coaxially oriented with the first housing. An insert member is provided in the second housing having an aperture therein of a given eccentricity. The insert member is slidably adjustable for rotational movement within the second housing for providing varying cross-sectional dimensions for the fluid flow through the pump. A rotor is disposed in the housing coaxial with the first and second housing. A plurality of vane members are provided on the rotor which respectively engage the walls of the first chamber and the insert member within the pump.
Abstract: A brake system for automotive vehicles is equipped with devices for the electric control of the brake force distribution and/or for the control of slip. The front wheels are connected to a pedal-actuated braking-pressure generator (1). In contrast thereto, the rear wheels (HR, HL) are acted upon with braking pressure by virtue of a braking pressure generator unit (5) which is composed of a vacuum servo unit (6) and a master cylinder (7) and which is actuated by a multidirectional control valve (4), such as a three-way/three-position rotary spool valve. The switch position of the valve (4) is responsive to the electric output signals of an electronic combining circuit (17, 17') which is, by way of wheel sensors, furnished with information about the rotational behavior of the wheels and the output of which circuit is electrically connected to the drive (19) of the three-way/three-position rotary spool valve (4).
Abstract: A simulated motor-sound producer for attachment to a frame member of a bicycle includes a toy balloon having a bulbous central portion positionable in the path of travel of the revolving spokes of the bicycle's wheel. The balloon is secured to the bicycle frame member by a pair of flexible, generally elongate straps wrapped around the frame member and end projections of the balloon. Each strap has a first side which comprises first hook and loop securement means and a second side having a frame engaging member and second hook and loop securement means. The frame engaging member of the strap has a reversely bent terminal end portion, the bight of which receives one of the end projections of the balloon. Further, the frame engaging member comprises a band of non-slip material which prevents relative movement between the strap and frame member.
Abstract: A control circuit for adapting slip control of an anti-skid brake system of an automotive vehicle comprising a friction coefficient identification circuit (31, 31'). Upon the instabilization of a wheel the braking pressure control signals controlling the slip by actuating solenoid valves (36-41) are varied by the output signal of the circuit (31, 31') as a function of the momentary deceleration (v.sub.R) of the fastest wheel and/or on the momentary pressure in the hydraulic brake circuits (52, 53, 54) and thus are adapted to the momentary friction coefficient, which in particular depends on the road condition. In one instance, the gradient of the vehicular reference velocity is varied in dependence on the friction coefficient.
Abstract: A slip-controlled brake system for automotive vehicles comprises a brake booster (1) acting on a tandem master cylinder (7, 7'), of pressure medium lines connecting the tandem master cylinder (7, 7') with the wheel brakes, as well as of controllable multi-directional valves (30, 31, 32, 37, 41, 50, 51, 53) in the pressure medium lines. The tandem master cylinder is composed of a push-rod piston (6, 42) of an intermediate piston (8), as well as of a resetting arrangement (23, 44). Further, an auxiliary pressure source (26), transducers for detecting the rotational behavior of the wheels, and electronic circuits for the evaluation of the measured values and for the generation of valve control signals are included in the brake system.
Abstract: A slip-controlled brake system comprises two hydraulically separated pressure medium circuits, to which the wheel brakes (14, 15 and 16, 17, respectively) of the wheels arranged diagonally at the vehicle are connected. In one diagonal (brake circuit 9) the braking pressure during slip control is controlled in phase, whereas in the second diagonal (brake circuit 10) individual brake slip control is possible by way of two individual inlet and outlet valve pairs (11, 18; 12, 19).
July 16, 1985
Date of Patent:
August 25, 1987
Alfred Teves GmbH
Helmut Fennel, Ivica Batistic, Otto Determann
Abstract: A hydraulic brake system with slip control for automotive vehicles comprising a master cylinder (2) pressurizable by a hydraulic power booster (1), in which system valve(s) (31,27,32,28,33,23) are inserted between the master cylinder (2) and the wheel brakes (29,30,24,25) connected to the master cylinder (2) which allow pressure fluid removal from the wheel brakes (29,30,24,25) that can be replenished out of the pressure chamber (19) of the hydraulic power booster (1) by way of a change-over valve (36). A stroke limitation of the brake pedal (8) is effected during slip control. The end surface of the master cylinder piston (5) close to the working chamber (16) being larger than the is effective surface of the booster piston (4), and wherein a stepped piston is employed as master cylinder piston (5) with an annular surface (18) thereof being adapted to be acted upon in the actuating direction by the pressure prevailing in the working chamber (16).
Abstract: A brake system with slip control comprises a conventional braking pressure generator (1), for example a master cylinder (2) with a vacuum-type booster (3) connected before it. An auxiliary pressure control valve (23) is provided whose control inlet port (21) is connected with a pressure chamber (9) of the master cylinder. As the slip control action starts, a hydraulic pump (26) is put into operation which causes an auxiliary pressure proportional to the pedal force to be built up by means of the control valve (23). The auxiliary pressure causes hydraulically actuatable valve arrangements (27, 28, 45, 46) to be switched over and thus the auxiliary pressure supply system (23, 26) instead of the master cylinder (2) to be connected with the wheel brakes (31 to 34). Simultaneously, the brake circuits (I, II) of the master cylinder are cut off and thus a further displacement of the master cylinder pistons (6, 7) is prevented.
January 27, 1986
Date of Patent:
August 11, 1987
Alfred Teves GmbH
Juan Belart, Jochen Burgdorf, Lutz Weise, Wolfram Seibert
Abstract: A sealing cap for cylindrical parts such as a bolt guide of a spot-type disc brake, comprises an elastic pleated bellows (15), one end portion of which is fastened to the periphery of a first cylindrical part, while the other end portion thereof is secured to the periphery of a second cylindrical part. A rigid reinforcing and retaining member (16, 17) is provided on at least one of said end portions (13, 14), with each reinforcing and retaining member being arranged with at least part of its radial extension on the same radius. To create a sealing cap which affords ease of manufacture and assembly, at least one of the reinforcing and retaining members (16, 14, 58) is provided of substantially U-shaped configuration when viewed in axial cross-section, thus forming first and second wall portions (26, 27; 47, 67; 59) as well as a base portion interconnecting said wall portions.
Abstract: A braking pressure generator for slip-controlled brake systems of automotive vehicles comprises dynamic (III) and static (I, II) pressure fluid circuits into which pressure fluid from the dynamic circuit (III) is metered during braking with slip control. A differential pressure pilot valve (4) is provided which compares the pressure in a booster chamber (15) of the hydraulic circuit (III) with the pressure in a prechamber (5) into which pressure is metered during braking with slip control. The differential pressure pilot valve (4) is connected to an alarm switch (9). The switching position of this alarm switch is logically combined with the switching position of a brake-actuating switch (8) and with the brake slip control signal (10) and an error signal is derived therefrom.
Abstract: A hydraulic vehicle brake system with anti-locking, wherein a braking pressure generator (25) comprising a hydraulic power booster (26) and a master cylinder (27) connected downstream thereof is employed for the pressure supply of the brake circuits. Wheel brakes (37, 34) are connected to the pressurizable working chambers (31, 32) of the braking pressure generator (25) by way of first valves (33, 36), while the working chambers (31, 32) are connectible with an auxiliary pressure source (1) by way of second valves (46, 146). A third valve (60) is interposed between the auxiliary pressure source (1) and the second valves (46, 146), which can be switched to assume an open position in response to a pedal contact (6) and sufficient pressure of the auxiliary pressure source (1).
Abstract: A hydraulic brake system for automotive vehicles with at least one load sensor (41) sensing the load condition of the vehicle and with at least one sensor (14, 15, 21, 22) associated wtih each vehicle axle for the detection of a braking parameter decisive for the braking operation. The measured values sensed are supplied to an electric evaluation circuit (18) which during a braking operation permanently computes suitable braking pressure values for the wheel brakes (3, 4) of the rear axle and delivers corresponding control signals to a braking pressure modulator (31, 53, 54). A braking force sensor (14, 15, 21, 22) is associated with at least one vehicle wheel (12, 13, 19, 20) of each vehicle axle.
Abstract: For the generation of a vehicle reference speed to serve as the reference value for the control of brake slip and/or traction slip in automotive vehicles, the rotational behavior of the controlled wheels is measured. The vehicle reference speed is defined by virtue of the rotational behavior of the individual wheels by way of logic combining, selection according to predetermined criteria and/or comparison with predetermined limit values. The wheel rotational behavior of each wheel is evaluated in comparison to the wheel-related vehicle reference speed (V.sub.Ref) according to several predefined criteria is then classified into reference-defining periods. As a function of ascertained reference-defining period, a vehicle reference value (b.sub.fzg) related to the individual wheel is determined which, together with the wheel-related vehicle reference values of the other wheels, determines the vehicle reference speed.