Abstract: An improved portable work bench includes a structural body, and a platform disposed on the structural body. In addition, the platform includes a cam mechanism for locking the position of the platform along the structural body. Further, the portable work bench may include a plurality of legs for supporting the structural body. The structural body may be tubular and preferably has a square cross-section. Accordingly, the user need only place the platform in any position along the length of the structural body and move the cam mechanism to lock the platform in place. The cam mechanism may include a cam pivotally attached to the platform near the structural body, so that when the user rotates the cam, the cam contacts the structural body, locking the platform. A plate may be disposed between the cam and the structural body. The plate may have a hook portion, which contacts the bottom surface of the structural body.

Abstract: Disclosed is a reaction vessel used for oxidizing and decomposing equipment suitable for processing with supercritical water, and methods of manufacturing the reaction vessel. The reaction vessel comprises an oxide film containing a platinum group metal oxide, for example having a fine crystalline structure, and a high corrosion resistance in both oxidizing and reducing atmosphere. The film is formed on a surface of the vessel by performing a pyrolysis reaction in an atmosphere containing water vapor. The oxide film is comprised of at least one platinum group metal oxide selected from Ir, Ru or Rh oxide, and a platinum group metal selected from Ti and Ta.

Abstract: A sealed cavity microstructure and an associated fabrication method are provided that incorporate both a tight pressure seal and a rugged structural bond. A rugged microstructure device incorporating a pressure-maintained cavity may thereby be fabricated. A vacuum cavity microbolometer is also provided that is fabricated using the associated method. The sealed cavity microstructure and the vacuum cavity microbolometer are thereby adapted to low-cost wafer-scale batch processing.

Abstract: Compositions and methods for obtaining nanocrystal dispersed amorphous alloys are described. A composition includes an amorphous matrix forming element (e.g., Al or Fe); at least one transition metal element; and at least one crystallizing agent that is insoluble in the resulting amorphous matrix. During devitrification, the crystallizing agent causes the formation of a high density nanocrystal dispersion. The compositions and methods provide advantages in that materials with superior properties are provided.

Abstract: A block structure in a ground contact face of a tread portion of a pneumatic tire comprises blocks defined by circumferential grooves and lateral grooves and a sipe formed in each surface of the blocks in a block row at least located near to a center of the tread and opening at least one end thereof to the respective circumferential groove, in which the sipe is opened through a width-widened part to the circumferential groove and a depth of the width-widened part is made shallower than a depth of a deepest part of the sipe.

Abstract: A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a radial carcass toroidally extending between a pair of bead cores and wound around the bead core from an inside toward an outside in the radial direction, a bead filler, and a reinforcing rubber arranged at the inside of the sidewall portion in the widthwise direction of the tire, wherein at least one cord reinforcing layer made from a cord(s) extending in an angle direction of approximately 90° with respect to a radial line segment is arranged in a region ranging outward from a vicinity of the bead core in the radial direction and has a width in the radial direction of the tire corresponding to 10-50% of a section height of the tire.

Abstract: A carton blank may be formed from a first sheet of relatively rigid material and a second sheet of relatively flexible fluid impervious material. The second sheet of relatively flexible fluid impervious material may cover some but not other portions of the first sheet of relatively rigid material in order to facilitate gluing of the other portions of the first sheet of relatively rigid material when the carton blank is assembled into a carton.

Abstract: A measuring gage for determining the thickness of a non-metallic material utilizes an inductive sensor positioned on one side of the material to be measured and a metallic object placed on the opposite side. The output of the sensor is used to determine the distance between the sensor and the metallic object, and hence the thickness of the material. The movement of the sensor and the metallic object can be computer controlled to map the thickness of the material along a predetermined path and produce a cross-sectional thickness profile. The output of the sensor can be used in conjunction with a computer controller responsible for adjusting the size of a score line to prepare an airbag deployment section in a vehicle trim panel.

Abstract: An apparatus and method for producing a succession of self-adhesive labels carried on a length of release material is provided in which a succession of images are digitally printed on a self-adhesive web, the web is die cut to form a succession of self-adhesive labels on a length of release material, and the web is adhered to the backing of release material between the printing and die-cutting steps, so that during the printing step different images can be printed in alternation on the web, and the web can be folded.

Abstract: A method for processing semiconductor wafers, which provides planarized surface in a well controllable manner and with high accuracy by processing a film with uneven surface, formed over a semiconductor wafer, within the area of a working surface with a diameter larger than that of said semiconductor wafer by not more than two times, and by processing the film with a polishing liquid supplied from a supply unit disposed on a vertically arranged working surface is disclosed. Additionally, high quality dressing of the working surface can be easily performed by virtue of the smaller diameter of the working surface. Furthermore, the vertical arrangement of the working surface makes possible ready compatibility with semiconductor wafers of enlarged diameters.

Abstract: A novel batch processing system used, for example, in plasma etching and chemical vapor deposition, wherein the pressure in the reactor is cycled through a varying pressure to increase the transfer of the reactant materials to the center of the wafer. One version of the invention provides a method that includes the steps of (I) feeding reactant gases into a reaction vessel, (ii) exhausting unused reactive gases and/or reaction by-products from the reaction vessel, and (iii) cycling the pressure in the reaction vessel between a higher pressure Phigh and a lower pressure Plow. Another version of the invention provides an apparatus that comprises (I) a reaction vessel, (ii) a feed means for feeding reactive gases into the reaction vessel, (iii) an exhaust means for exhausting unused reactive gases and/or reaction by-products from the reaction vessel, and (d) a pressure control means for cycling the pressure in the reaction vessel between a higher pressure Phigh and a lower pressure Plow.

Abstract: A reticle adapter that is capable of supporting a reticle in a conventional reactive ion etch chamber that is designed for etching circular silicon wafers. The adapter has a lower portion that is milled to cover the upper portion of a pedestal within a reactive ion etch chamber. A top portion of the adapter has an opening that is sized and shaped to hold a reticle.

Abstract: A balcony shielding device for shielding a balcony against sun rays and providing a visual shield preventing adjacent on-lookers to visually access the balcony. The balcony shielding device includes: a first and a second shielding section. A securement component is provided for securing the second shielding section to the banister directly in front of the latter. A first securement component is provided for securing the first shielding section to the second shielding section so that the first shielding section is positioned above the banister. Adjustment components are provided for allowing adjustment of the height and angulation of the second shielding section. The second section securement components are adapted to attach the shielding device to both the handrail and the footrail of conventional balcony banisters.

Abstract: A side window roll-up blind for motor vehicles has a winding shaft which is rotatably supported preferably behind the side lining of the door or of the B-column (3). Through a slot in the door (7), a blind material (31) can be drawn out, which covers the window (21). For this purpose, an actuating member engages on the edge of the blind material (31) that covers the furthest distance. The actuating member is a linear-form element which, depending on the embodiment, is either pull-resistant or pressure-resistant. The blind material (31) itself can be held clamped-open beside the window with the aid of at least one guide rail or of one or two pressure-resistant or bending-resistant actuating members.

Abstract: A plate type heat pipe comprises: (1) a container including a plate member having a surface to which a heat generating part is connected, and another plate member positioned in such manner to face the plate member and to form a hollow portion therebetween, (2) a folded portion extended outward of the container, which is formed in such manner that end portions of respective plate member and another plate member are placed to form layers, and thus placed layers are folded in one side to cause the hollow portion to be hermetically sealed, and (3) a working fluid enclosed in the hollow portion.

Abstract: A condenser core portion carries out a heat exchange between refrigerant and air. The condenser core portion includes a plurality of condenser tubes through which the refrigerant flows and condenser fins disposed between each pair of adjacent condenser tubes. A radiator core portion is disposed in series with the condenser core portion in an external fluid flow direction with a predetermined clearance therebetween, to carry out a heat exchange between engine coolant and the air. The radiator core portion includes a plurality of radiator tubes through which the engine coolant flows and radiator fins disposed between each pair of adjacent radiator tubes. A connecting portion integrates each of condenser fins and radiator fins. The condenser fins disposed at an upper area of the condenser core portion introduce cooling performances more than the condenser fins disposed at a lower area thereof.

Abstract: A plurality of first projections 113a are provided in a first side wall portion 111a of a grooved section 111 formed by bending part of a sheet-like workpiece to have a U-shaped cross-section, which projections extend away from a connecting portion (top) 111c. Since the first side wall portion 111a deforms to widen a groove width of the grooved section 111 due to spring-back, a tip end of the first projection 113a is first brought into contact with the inner wall 110a. Therefore, a reaction force against the compressive force is applied to the tip end of the first projection during the pre-assembly process. Since the tip end of the first projection 113a is not movable due to the contact with the inner wall 110a, a bending moment is applied to the first side wall portion 111a and the connecting portion 111c to reduce the groove width.

Abstract: A vehicle air conditioning system includes a space air conditioning unit for blowing conditioned air into a passenger compartment, a seat air conditioning unit for blowing air into a vehicle seat, and a control unit for controlling the space air conditioning unit and the seat air conditioning unit. The control unit includes space controlling means for controlling the space air conditioning unit in accordance with a space control value calculated based on a space target air temperature, and seat controlling means for controlling the seat air conditioning unit in accordance with a seat control value calculated based on the space target air temperature. Further, the seat controlling means includes a first seat air conditioning means which determines the seat control value in a steady air conditioning state of the passenger compartment, and a second seat air-conditioning means which determines the seat control value in a transition air-conditioning state of the passenger compartment.

Abstract: A cleaning tool (1) for cleaning casing within a wellbore is comprised of an upper (3) and lower (4) sleeve which are mounted via ball bearings (5) on a work string (2). The ball bearings enable the upper (3) and lower (4) sleeves to have no or negligible rotational movement notwithstanding rotation of the work string (2). The upper (3) and lower (4) sleeve limit the axial movement of the cleaning tool (1) along the work string (2). The cleaning tool (1) is further comprised of at least one lantern (6) which supports the plurality of cleaning member (7) which may be brushes or scraping blades.

Abstract: A method of cementing a well using a cementing spacer. The method includes pumping a drilling fluid into a well. A cementing spacer is then pumped into the well to serve as a buffer between the drilling fluid and a cement. The cementing spacer includes substantially unviscosified water and a weighting agent. Cement is then pumped into the well to displace the cementing spacer and the drilling fluid to complete the cementing of the well.

Abstract: An improved dump valve assembly (22) is provided for use as a part of an elongated, sectionalized, tubular downhole pipe string (18). The assembly (22) includes a tubular pipe section (24) having endmost threading (34, 38) and a rupture disc fitting (26); the fitting (26) includes a metallic, preferably concavo-convex disc (50) with performed lines of weakness (52, 54) on one face thereof. The section (24) is interconnected between a pair of lower pipe sections (20a, 20b). In operation when it is desired to elevate the string (18) from the well, the fluid within the string (18) is pressurized sufficiently to rupture the disc (50), thereby allowing fluid within the string (18) to drain. The string (18) and other well components can then be removed from the well without contamination owing to spillage from the tubular string (18).

Abstract: A three-point hitch for a tractor on which an attachment can be mounted has its lower links pivotally connected to the tractor at the tractor side and actuated by hydraulic cylinders in mounts on a hitch bracket. The upper link can be a piston-and-cylinder arrangement pivotally connected to the hitch bracket.

Abstract: A protective apparatus for preventing the infiltration of contaminants in a fluid-operated percussion device, having a striking tool (3) that is guided to move in a housing (2) and is driven by a percussion piston in the striking direction (arrow 1), and a seal (7) that is supported at least indirectly on the housing (2), on the one hand, and on the striking tool (3), on the other hand, and has a securing segment that is fixedly disposed with respect to either the housing or the striking tool. The seal (7) is disposed between the inner guide portion (5b) of the striking-tool guide and the theoretical striking plane (4) of the percussive piston on the striking tool (3), when seen in the direction opposite the striking direction (arrow 1), such that the countersurface (3e) for the seal, which countersurface moves relative to the securing segment (7a) of the seal (7) and is in contact with the seal, is unaffected by wear.

Abstract: A throttle valve for hydraulically or pneumatically operated tools is proposed, comprising a valve housing which receives a throttle part and is arranged between the tool and the power fluid line, a first and a second apparatus being arranged to be in operative connection with the valve housing, the second apparatus being arranged to be actuatable to regulate the drive only after an intentional actuation of the first apparatus to prevent inadvertent or unauthorized actuation, the first apparatus having at least a first release mechanism for initial unlocking and a second release mechanism for further unlocking, the release mechanisms being movable in two directions (x, y) extending perpendicularly to one another, and the second apparatus for regulating the drive being arranged to be movable in a direction of rotation (z) extending parallel to the x direction.

Abstract: A fluid-operated percussion device (1) having a percussive piston (3), which alternately executes a work stroke and a return stroke due to the effect of a control. To avoid no-load strikes, in one embodiment of the percussion device (1), the percussive piston (3) is shut down if it has overshot the extended position occurring in normal operation (long- and/or short-stroke operation) by a predetermined distance in the work-stroke direction (arrow 3e) and reached a no-load-strike position. For this purpose, the interior (2d) of the work cylinder (2) that receives the percussive piston (3) additionally has a no-load-strike opening (20a), which is connected to the pressure line (8) of the percussion device (1) with an interposed safety element (21) that can be switched between an inoperative position and an operative position.

Abstract: An electromagnetic interference shield for use around access panels and doors in electronic equipment enclosures includes a base and profile manufactured from an electrically nonconductive solid material such as a thermoplastic resin polymer. An electrically conductive layer of a metallized fabric is bonded to the profile to provide effective shielding and grounding functions. The underlying polymer provides elastic compliancy and resiliency to the shield.

Abstract: An improved duct or raceway including a modular duct system and manufacturing technique for fabricating the components of the improved system as used in connection with electrical control panel wiring. The duct system utilizes an interlocking construction that may comprise extruded plastic base and top members connected to interlocking apertured sidewalls. The sidewall members, when fabricated by injection molding techniques provide for smooth surfaces for accepting protruding wires or relatively small wire bundles.

Abstract: An arrangement for locking first and second housing halves, adapted to connect to each other, includes a pin provided on the first housing and a locking member, with a pair of arms which are provided on the second housing to engage and hold the pin when the first and second housings are connected.

Abstract: The wiring harness has a plurality of first sub-harnesses, a plurality of second sub-harnesses, and a connection portion electrically connecting one of electrical cables of the sub-harnesses to another. The first sub-harness has a first press-fit terminal joined to each end of a first one of the electrical cables, and the first sub-harness has a first isolator holding the first press-fit terminal. The second sub-harness has a second press-fit terminal, a crimp terminal, and a connector housing for accommodating the crimp terminal, and a second isolator supporting the second press-fit terminal. The second press-fit terminal is connected to one end of a second one of the electrical cables, and the crimp terminal is connected to the other end of the second one of the electrical cables. A connection means is provided for connecting one of the press-fit terminal held by one of the first or second isolators to the press-fit terminal held by another of the first or second isolators.

Abstract: In an end-processed coaxial cable structure in which at least one end of a coaxial cable assembly formed by paralleling a plurality of coaxial cables is cut, jacket layers are removed in the vicinity of a cut end portion thereof to expose shielding layers, the shielding layers are further cut to a determined length to expose dielectric layers, the exposed shielding layers are put between metal ground bars to cover them, and the metal ground bars are fixed with solder onto the shielding layers and the dielectric layers arranged at determined intervals, cut ends of the shielding layers exist substantially inside the metal ground bars and are not projected to the outside thereof.

Abstract: Insulating bushing in which the external insulating casing consists of a single monolithic insulating tube (27) on which the flange (28), the upper insulating ring (26) and a lower electrode (29) are assembled by gluing. This obviates the use of intermediate seals required by the prior art in which the insulating casing is made in a plurality of pieces, these seals being a possible source of leakage. The whole assembly is more resistant to mechanical stresses caused by seismic events or internal short circuits; it is also safer, lighter and more economical.

Abstract: A substrate for power semiconductor modules with a through-plating of solder, includes two metal plates and a ceramic plate which is seated as a layer between the metal plates and has a through hole formed therein. The substrate is plated through by making a through hole in one of the metal plates in alignment with the through hole in the ceramic plate and applying a paste solder to one side of the substrate. The substrate is then subjected to a furnace step, so that the paste solder flows into the through holes and the solder makes a permanent contact between the two metal plates. A method for producing the substrate is also provided.

Abstract: A ceramic wiring board provided with an insulating layer of a high dielectric constant formed of a ceramic sintered product having a high dielectric constants wherein the ceramic sintered product contains a crystal phase of lanthanum titanate and a glass phase present on the grain boundaries of the crystal phase, and has a coefficient of thermal expansion at 40 to 400° C. of not smaller than 8×10−6/° C. and a specific inductive capacity at 1 MHz of not smaller than 10. The wiring board contains a capacitor and is very useful in realizing various electric circuit devices in small sizes, and can be further reliably mounted on a printed board that uses an organic resin as an insulating material.

Abstract: A system, apparatus and method for automatically limiting the thrust force applied to a drill string during an underground boring process, in order to prevent the deformation or collapse to the drill rods due to reaching the yield point of the rods. One or more drill string characteristics that have an impact on the yield point of the drill string, or portions of the drill string, are determined. The yield point of the drill string or portion is computed, where the yield point is computed as a function of the drill string characteristics. The thrust force imparted to the drill string is adjusted in response to the computed yield point.

Abstract: Specific apparatus and associated methods are described for use in establishing the positions of locating field detectors and for path mapping within a region for the purpose of tracking and/or guiding the movement of an underground boring tool. In one aspect, an improvement is provided forming part of an arrangement for tracking the position and/or guiding the boring tool using an electromagnetic locating signal which is transmitted from the boring tool as the boring tool moves through the ground. At least two detectors are located at fixed positions within the region, each being operable in a transmit mode and in a receive mode such that each one of the detectors in the transmit mode is able to transmit a relative locating signal to the other detector for use in determining the relative position of one detector in relation to the other and such that both detectors receive the electromagnetic locating signal in the receive mode for use in determining the position of the boring tool within the region.

Abstract: A core barrel has a plurality of pneumatic downhole hammer drills disposed around the perimeter of its working end for drilling piles in the ground for use in foundations, secant piles, and the like. The core barrel includes a slurry port and an air port at its top end for admitting a drilling slurry and pressurized air, which is used in driving the hammer drills and flushing cuttings from an annular kerf during drilling. A plurality of generally parallel plates form the top of the core barrel and define an air channel and a slurry channel for delivering air and slurry to the core barrel wall, where they flow freely or via conduits toward the hammer drills at the working end of the core barrel. The hammer-type core barrel is used to construct piles by first drilling an annular kerf in the ground. Circulating drilling fluid cools the working end of the hammer drills elements and washes cuttings from the kerf during drilling.

Abstract: A bottomhole assembly (BHA) for use in well operations, with particular application to use in drilling with a downhole drilling motor and with coiled tubing and directional drilling, including a novel power pack, orienting tool, arrangement of bottomhole assembly tools, and method of use of the BHA for orienting while drilling.

Abstract: A vehicle for transporting a payload over a surface that may be irregular and may include stairs. The vehicle has a support for supporting the payload and a ground contacting element movable with respect to a local axis, where the local axis can be moved with respect to some second axis that has a defined relation with respect to the support. The vehicle also has a motorized drive arrangement for permitting controllable motion of the ground contacting element so as to operate in an operating condition that is unstable with respect to tipping in at least a fore-aft plane when the motorized drive arrangement is not powered. The vehicle also has an input device for receiving an indication from an assistant who is not disposed on the vehicle of a direction of desired motion of the vehicle.

Abstract: Electrical machine having an electrical component, which has a rotor component and a stator component and is arranged inside a housing. The housing has a first housing wall which surrounds the electrical component in the circumferential direction, with the housing having an accommodation space which extends radially outward from the first housing wall from the electrical component with respect to the rotation axis of the rotor component. The individual components of the power electronics for controlling the electrical machine are arranged inside the accommodation space.

Abstract: The present invention aims to improve convenience of a wheelchair by enabling an outside fitting type of auxiliary power device to be automatically and securely mounted on and removed from the habituated wheelchair.

Abstract: A motor vehicle has a combustion engine as a primary drive source, generating an engine torque (302) which is transmitted along a power train containing an input shaft (320), a main clutch (308), a gear-shifting transmission (310) with gears (316, 318, 324, 326), shift clutches (328, 330), and an output shaft (322). The power train includes a superimposed additional transmission (312) with a planetary gear device (314), and a secondary drive source in the form of an electric motor/generator with a rotor (342) attached to the ring gear (332) of the planetary gear device (314) and a stator (344) attached to a stationary part of the vehicle. The secondary drive source generates an additional torque (346) to supplement or replace the engine torque (302) as needed, e.g., to eliminate gaps in vehicle traction during gear shifts or to propel the vehicle electrically in stop-and-go traffic. The secondary drive source may also be used in a generator mode, e.g., to recycle energy from decelerating or coasting downhill.

Abstract: A unique drive transfer device for use with personal electric vehicles, such as bicycles and scooters. In particular, a cordless, battery-driven rotary hand held tool is mounted to the vehicle in a manner whereby the rotatable output shaft of the tool is coupled to the rear wheel of the vehicle to drive the vehicle. The tool is powered by one or more batteries, a battery pack being mounted to the vehicle. The tool output shaft provides torque on demand and is sufficient to drive the vehicle over a wide range of speeds.

Abstract: A motorcycle includes an integrated locking system. The locking system actuates a seat lock from the main switch as well as a handlebar or steering lock. The steering lock is structured such that an overlap of components results in a locking pin passage that extends into a locking pin chamber. The locking pin passage is substantially shielded by a labyrinth defined by overlapping components. The main switch is positioned forward of at least one gauge and a meter cover surrounds at least the gauge and the main switch as well as covers at least a portion of the fuel tank.

Abstract: A motorcycle includes an integrated locking system. The locking system actuates a seat lock from the main switch as well as a handlebar or steering lock. The steering lock is structured such that an overlap of components results in a locking pin passage that extends into a locking pin chamber. The locking pin passage is substantially shielded by a labyrinth defined by overlapping components. The main switch is positioned forward of at least one gauge and a meter cover surrounds at least the gauge and the main switch as well as covers at least a portion of the fuel tank.

Abstract: A control system for an electric power steering system which generates a steering assist force by an electric motor driven on the basis of a steering torque applied to an operation member. The control system includes: a target current determining circuit for generating a target current value according to the steering torque; a compensation value determining circuit for generating a compensation current value according to a time-based differential value of the steering torque; a waveform transforming circuit for performing a waveform transformation to convert the compensation current value into a modified compensation value which sinusoidally changes with time; a circuit for generating a control command value by superimposing the modified compensation value obtained through the waveform transformation on the target current value; and a motor driving circuit for driving the electric motor on the basis of the control command value.

Abstract: The loudspeaker comprises a cone (2) and a beading (4) attached to the cone (2). The beading (4) is composed of a sprayable plastic layer which is soft in its solid state. The manufacture of the loudspeaker is facilitated by a process in which an open negative mold (16) is used in which the cone (2) is arranged and immobilized. Following this, the plastic is sprayed into the open negative mold (16) and the beading (4) is formed as a soft plastic layer which attaches itself to the cone (2). (FIG.

Abstract: A mobile machine, in particular a fork lift truck, having a chassis and a cab located on the chassis. There are one or more pneumatic or hydropneumatic suspension elements to improve comfort and ride quality between the chassis and the cab.

Abstract: An elevator user creates on a user terminal an individual user program, that is adapted to his needs, for operating the elevator. The user terminal can include a keypad for selecting commands and entering values, and a screen for displaying the command sequence. Depending upon authorization, the user can access the entire command set or only certain commands. The user program is transmitted to a terminal of an elevator control by wireless communication and proceeds to a program control which adds to the user program data required for execution and stores it in a memory. A task manager of the control program initiates the execution of the user program by an interpreter that interprets the program step by step. In the case of elevator-specific instructions such as, for example, travel commands or door opening commands, the interpreter calls up an interface that initiates the further execution by an elevator control.

Abstract: An elevator, particularly a friction driven elevator, with a cage guided in an elevator shaft and with a driving motor with associated control cabinet. According to the invention, in case of need and to provide access to the driving motor and/or control cabinet, a closed power unit space is provided which can be temporarily set up in the elevator shaft, whereby the operation of the cage in both portions of the elevator shaft which are situated below or above the temporarily set up power unit space remains unaffected. In the region of the power unit disposed in the shaft, the control cabinet is disposed in the shaft alongside the path on which the cage travels and there is provided at least one plate which, in order to form a negotiable platform and/or a protective roof, can be moved into a horizontal position associated with the control cabinet. Advantageously, in normal operation of the elevator, the plate serves as a cover for the control cabinet and is rotatably articulated on the control cabinet.

Abstract: The invention relates to a hydraulic vehicle brake system (10), having a hydraulic pump (12) and a high-pressure hydraulic reservoir (22) for external-force braking, as well as a conventional master cylinder (28), which serves as a set-point brake force transducer for the external-force braking and serves the purpose of muscle-powered secondary braking if the external-force service brake system fails. To embody the vehicle brake system (19) with an active pedal travel simulator, the invention proposes connecting the master cylinder (28) to a low-pressure hydraulic reservoir (26) via a disconnecting valve (30) and to the high-pressure hydraulic reservoir (22) via a return valve (32).