Abstract: In a disc brake with automatic adjusting device, a nut (12) is screwed to an axially slidable, unrotatable spindle (11). Nut (12) is connected to a coupling element (13). An auxiliary piston (32) is slidably mounted in a bore (31) of the brake piston (4) and is connected to the nut (12) by an axially lockable snap-in connection (35, 37, 38).

Abstract: A shoe gap adjusting device includes a piston for pressing a brake shoe through a piston head, having a projecting end part with a boot cover for protecting an elastic boot that seals an end part of a cylinder body. A shoe gap adjusting ring is fitted on the end part of the piston in a non-rotatable manner. A elastic piece at the inner periphery of the cover axially extends through a cut-out in the ring and elastically supports the outer peripheral surface of the head so that the piston head is elastically attached to the piston. A tool can be inserted through an opening and engaged with an outer peripheral cut-out of the ring, for rotating the ring relative to a bolt and performing an adjustment of the shoe gap. The device simultaneously allows the protection for the elastic boot and realization of rotational operability of the shoe gap adjusting ring by the tool.

Abstract: An improved brake system includes a parking brake piston fixed to the backing plate of a brake friction material for a large vehicle. Service brake pistons are positioned about the parking brake piston. Both the service and parking brake may selectively actuate the brake. Upon actuation by the service brake piston, the parking brake piston moves with the backing plate. The parking brake is set by a parking brake actuator which is connected through a connector to the parking brake piston. When the service brake is set, it causes the connector to move with the parking brake piston. If adjustment is necessary, the connector will hit a stop, and adjustment of the connector along the parking brake piston will occur to compensate for wear on the friction material.

Abstract: An automatic brake adjustment for small transmissions, such as used with riding lawn mowers and the like. A brake disc rotated by the transmission is selectively engaged by friction producing pucks brought into engagement with the brake disc by a rotatable lever having a cam operating a puck. The axial position of the brake lever on its supporting shaft is determined by a threaded nut and automatic rotational nut adjustment is produced by a wheel having evenly spaced shoulders in the form of ratchet teeth defined upon its periphery selectively and sequentially engaged by a detent mounted upon the brake lever. When puck wear of sufficient extent occurs, the detent will sequentially engage the following shoulder of that previously engaged to rotate the brake lever adjustment nut during the next brake actuation thereby translating the brake lever and puck toward the brake disc to compensate for puck wear.

Abstract: Air pressure actuated and hydraulic applied railway car parking brake system includes air source to actuate. A control valve receives air from source to initiate air communication. Pneumatic to hydraulic pressure intensifier receives air in first chamber therein from valve. A second intensifier chamber is connected at open first end thereof with partially open second end of first chamber. Hydraulic fluid is disposed in second chamber adjacent closed second end thereof. A force transmitting cylinder, in fluid communication with second chamber, exerts force on brake beam carrying brake shoes thereon which are brought and maintained in frictional engagement with a respective surface of tread portion of a pair of wheels during system operation. A piston member, disposed for reciprocal movement in first chamber, is linearly displaced when a first surface thereof is acted on by air communicated to intensifier.

Abstract: In a disc brake having, a thrust piece which extends parallel to the plane of the brake rotor and which presses a brake pad against the rotor in the direction of the axis of the rotor, an adjusting mechanism is provided which includes a torque-dependent one-way coupling for obtaining automatic, wear-compensating adjustment of the gap between the brake pad and the brake rotor. The torque-dependent one-way coupling is coupled to the thrust piece in such a way that it moves along with the thrust piece in the direction of the axis of the rotor.

Abstract: An adjustment mechanism for advancing the backing plate and friction material of a disc brake includes an over-torque clutch that provides a positive connection between inner and outer over-torque clutch members. In a preferred embodiment, spherical balls are forced into holes in both the inner and outer over-torque clutch members to allow rotation to be transmitted between inner and outer over-torque members. If the torque load exceeds a predetermined limit, then the balls move out of holes in at least one of the inner and outer over-torque clutch members. The spring force is preferably an axial force applied by a wave spring, which forces a washer to bias a plurality of balls into the holes.

Abstract: A pressure actuated force transmitting cylinder includes a housing member having first and second elongated portions. An end cap closes one end of the housing in a fluid tight manner. A connection is formed through such first portion for communicating fluid to such cylinder. A clutch having a first clutch surface is disposed on such housing and a piston-like member is disposed for reciprocal movement in such housing. A seal disposed around a peripheral portion of such piston-like member provides a chamber to receive such fluid. An elongated rod-like member, having a threaded portion, is connected to such piston-like member. A threaded nut member is threadedly engaged with such threaded portion. A trigger mechanism is disposed around a portion of such rod-like member adjacent such nut member. A disc-like member is disposed around such trigger.

Abstract: A pneumatically operated disk brake having a caliper actuated by an application through a traverse member which is displaceably guided with respect to the brake disk, at least one adjusting spindle is adjustably screwed to the traverse member and an adjusting device acts upon the adjusting spindle to maintain a desired ventilating play. A device is provided which prevents any rotating of the threaded spindle up to a specified torque. For a two spindle device the synchronization device can be locked in the released condition of the brake. Another solution is to provide on each adjusting spindle its brake-disk-side end a frontal toothing which engages in a corresponding frontal countertoothing of its pressure piece.

Abstract: A heavy duty caliper brake assembly mounted in a position to engage a brake disc, the caliper including means for supporting the caliper on the housing, a brake pad mounted on the caliper on each side of the disc, a rotor mounted on one leg of the caliper in a position to engage one of the brake pads and a ball ramp assembly positioned between the caliper and the rotor for moving one of the brake pads into engagement with the brake disc on rotation of the rotor with respect to the caliper.

Abstract: A brake actuator includes a tubular housing member, connected at a first end to a cylindrical housing with a member for admitting fluid, a piston with a sealing member mounted for reciprocal movement within such cylindrical housing, a tubular stem connected at one end to such piston, the tubular stem having a first conical surface at its other end, a piston return disposed intermediate such first piston and the tubular housing, a flange connected at one end to another end of the tubular housing, a pair of abutment surfaces carried by such flange and an externally threaded rod having a first portion extending inside the tubular housing and such tubular stem and a second portion extending outwardly from such tubular housing and through the flange, the improvement of a collet style slack adjuster to adjust for wear of braking elements.

Abstract: The disk brake with a caliper (2) reaching over a brake disk (1) exhibits on one side a clamping mechanism. The clamping mechanism includes a cam lever (4), which can be rotated around an axis parallel to the plane of the brake disk and interacts preferably by way of a traverse (6) with one or two adjusting spindles (7, 8), against which a brake lining (10) is braced. The two adjusting spindles (7 and 8) are coupled by means of a toothed belt (12). Into a recess of the one adjusting spindle (7) projects a rotating drive (14), which can be driven by the cam lever (4) and during the application stroke causes the adjusting spindle (7) and thus by way of the toothed belt (12) also the adjusting spindle (8) to be screwed in the direction of approach to the brake disk (1). The rotating drive (14) includes a one-way revolving coupling and a torque limiting coupling, thus preventing a screw connection of the adjusting spindles (7 and 8) during the fixed brake stroke and the release stroke.

Abstract: An automatic adjusting apparatus for a disc brake with a brake caliper housing. The disc brake is furnished with a brake piston which is slidingly positioned within a cylinder for the actuation of a brake shoe and which is actuatable by means of a hydraulic actuating device and a mechanical actuating device. The apparatus also includes an extendable adjusting unit which is disposed between the brake piston and the mechanical actuating device and includes an adjusting nut threadedly mounted on an adjusting spindle. The apparatus is arranged with a friction clutch to hold back one of the adjusting elements in the event of a mechanical actuation. The brake piston has a cylindrical portion which is directed into the interior of the brake piston and projects from the brake piston. The cylindrical portion of the brake piston is surrounded by the adjusting nut and a ring-shaped circumferential sealing element bears against an external surface of the cylindrical portion of the brake piston.

Abstract: A hydraulic wheel brake cylinder (12) and the housing (22) of an intermediate support (20) are mounted diametrically opposite each other on an anchor plate (10) and on said intermediate support (20) two brake shoes (16, 18) bear with their ends remote from the wheel brake cylinder (12). A mechanical actuator (50-58) is additionally arranged in the vicinity of the wheel brake cylinder (12). The wheel brake cylinder (12) and the intermediate support (20) are so arranged that on hydraulic actuation of the brake in the forward direction both brake shoes (16, 18) are secondary shoes. On the housing (22) of the intermediate support (20) a guide (24) at least approximately parallel to the wheel brake cylinder (12) and a stop (26) ar formed. In the guide (24) an adjusting member (28) is axially displaceable to a limited extent.

Abstract: A brake actuating device is furnished with a device for slack readjustment of a brake, in particular of a vehicle brake. Defects in the area of the readjustment device can result in an erroneous and defective brake behavior. The invention device furnishes a continuous control of the brake release gap and the brake lining wear. The motion of the slack readjustment device (5, 7) is used for generating a measurement distance (n) which is scanned by a signal generator (27, 31) for feeding a signal to an evaluation device and for indicating the readjustment situation. The evaluation device serves for a continuous surveillance and monitoring of the brake release gap and of the brake lining wear in a vehicle or in a diagnostic center, where the evaluation device can be connected to the vehicle.

Abstract: Resetting of the actuator piston of a disc brake by an adjusting device is enabled by sliding movement of the piston so that a piston position may be reset without any special arrangement for turning an adjusting spindle (5), or by turning the piston itself. The adjusting spindle (5) is released for rotation during resetting, while the adjusting spindle (5) is normally fixed against rotation yet axially slidably during the time of hydraulic actuation and during manual braking.

Abstract: A wheel cylinder has a body, pistons, boots and seals. A screw assembly positioned between the two pistons holds the pistons apart to maintain the specified clearance between the brake linings and the brake drum while the brake is released. If a predetermined amount of outward movement of the pistons occurs during brake actuation, the screw rotates with further piston outward movement. When the brake is released, the pistons return inwardly, and the screw is locked against reverse rotation by means of a clutch, preventing the pistons from returning more than the prior predetermined amount of outward movement before screw rotation began. A clutch seal on an extension of one clutch member seals in a piston cylinder section. The other clutch member is formed on that piston next to one end of the cylinder section. The cylinder section axially beyond the seal is vented to atmosphere.

Abstract: The automatic adjuster (5) for the drum brake (6) comprises first and second oppositely disposed end members (30, 40) each having slots (32, 42) for receiving nonrotatably brake shoe webs (10, 14) and a parking lever (22). The first end member (30) includes a radially expanded end portion (34) defining an interior cavity (36) with a conically shaped surface (38). The second end member (40) is connected with a rotatable starwheel flange (44) of a longitudinally extended shaft (48) having therein a threaded opening (49), the starwheel flange (44) immobilized by a return spring (16) of the brake (6). An intermediate member (50) has at one end a threaded shaft (52) which is received threadedly within the threaded opening (49) of the shaft (48) and at the other end a conically shaped member (54) which engages the conically shaped surface (38) of the first end member (30).

Abstract: A disc brake caliper assembly for a rotary disc brake of a vehicle which has a wear adjustment mechanism is provided. The disc brake caliper assembly (10) includes a caliper housing (14) with a piston (28) slidably mounted therein, but prevented from rotating by a lug (30) on a brake shoe (16) secured thereto which keys in a groove (32) in the piston. An actuator screw (44) and actuator nut (66) are positioned in an internal bore (65) in the piston for mechanical actuation of the brakes. If the brake pads (20,22) wear, on hydraulic actuation of the brakes, a thrust washer (70) engages and moves the actuator nut axially along the actuator screw to a new position which restricts reverse movement of the piston to a new (wear adjusted) position relative to the caliper housing. An actuator cone (68) having a friction clutch surface biased into engagement with a friction clutch surface on the piston prevents reverse movement of the actuator nut.

Abstract: The disc brake (100) with variable width caliper comprises first and second bridge members (14, 15) which are connected with a pair of movable members (20, 30) extending over the periphery of the rotor (51). Each of the movable members (20, 30) is mounted upon an anchor extension (37A, 38A). An inboard end of each movable member (20, 30) includes threads (26, 36) upon which is threadably mounted a nut (28, 29). The nut (28, 29) has rachet teeth (12, 13) on one axial end which engage rachet teeth (10A, 11A) of an associated actuator sleeve (10, 11) disposed slidably about the movable member (20, 30). The second bridge member (15) is mounted slidably upon the movable members (20, 30). The actuator sleeves (10, 11) may be rotated by an actuator mechanism (70) which, through the engaged rachet teeth (10A, 11A; 12, 13), causes the nuts (28, 29) to rotate and effect translational movement of the movable members (20, 30).

Abstract: A continuous automatic adjustment device for a mechanically actuated sliding saddle disk brake (1, 2, 3, 4, 5, 6) wherein the mechanically actuated device for moving the sliding saddle (1) vis-a-vis the brake disk (6) includes a diagonal-track spreading device (10, 11, 12) around an actuating shaft (7). The adjustment device has an adjustment nut (14) coupled with the actuating shaft (7) by a directional clutch (33) which operates in the direction of actuation when actuating shaft (7) turns and is formed by a wrap spring (33) or a freewheeling sleeve (34, 35). A force-dependent coupler (30) can be axially released from the action of a compression spring (23) when a given torque is exceeded by the actuation shaft, thereby preventing rotation from being transmitted to the adjustment nut.

Abstract: A disc brake caliper assembly for a rotary disc brake of a vehicle which has a wear adjustment mechanism is provided. The disc brake caliper assembly (10) includes a caliper housing (14) with a piston (28) slidably mounted therein, but prevented from rotating by a lug (30) on a brake shoe (16) secured thereto which keys in a groove (32) in the piston. An actuator screw (44) and actuator nut (66) are positioned in an internal bore (65) in the piston for mechanical actuation of the brakes. If the brake pads (20, 22) wear, on hydraulic actuation of the brakes, a thrust washer (70) engages and moves the actuator nut axially along the actuator screw to a new position which restricts reverse movement of the piston to a new (wear adjusted) position relative to the caliper housing. An actuator cone (68) having a friction clutch surface biased into engagement with a friction clutch surface on the piston prevents reverse movement of the actuator nut.

Abstract: A disc brake comprising a clamp member which is slidably connected to a torque taking member, with a hydraulic actuator mechanism and an adjuster mechanism being located within the clamp member and a spring arranged to act on the clamp member and adjuster mechanism to provide a parking brake facility. The adjuster mechanism comprises an adjuster nut which is threadedly engaged on an axially movable actuator shaft which acts on a friction pad, the adjuster nut having an annular series of detent teeth formed on two axially and oppositely directed faces. The detent teeth are arranged such that when the teeth on one face of the adjuster nut are fully meshed with the teeth on a part of the adjuster mechanism on which the spring acts, the teeth on the detent collar are engaged with but offset from the teeth on the other face of the adjuster nut.

Abstract: The device (1) to prevent unintentional movements of surfaces (17, 18) which are movable towards each other essentially comprises a cylindrical casing (2) with crosspiece heads (5) connected to said casing and extending in a transverse direction and a safety mechanism (3) within said casing for a screw (4) capable of being retracted into and extended from said casing which screw is connectable via a T-shaped crosspiece to a second surface part.

Abstract: A one-piece casing (20) comprising a bottom (22) and a shell (24) formed with a cylindrical bore (26) houses a piston (30) for hydraulic actuation of a brake. For mechanical parking brake actuation, a shaft (34) is supported in the bottom (22) of the casing and a ramp arrangement (50) is rotatable by the shaft, thereby being displaceable axially away from a ramp arrangement (40) which is secured to the casing. Two strut members (60,64) which are screwed together constitute an adjustable strut between the axially adjustable ramp arrangement (50) and the piston (30). A return spring (90) is positioned under axial bias between a thrust bearing (92) secured to the casing and a thrust bearing (58) at one of the two strut members (60). The thrust bearing (92) which is secured to the casing is formed at an insert (84) by which one of the strut members (60) is guided non-rotatably.

Abstract: A disc brake mechanism, including an integral mechanical parking brake assembly and having automatic wear adjustment features, is disclosed. The adjusting mechanism comprises an axial thrust screw having one end exposed to atmospheric pressure to create an axial hydraulic differential pressure acting thereacross. An adjusting nut is threadably received on the thrust screw and normally engages a hydraulic actuating piston such that the adjusting nut is free to rotate with respect to the thrust screw and piston. Hydraulic pressures acting upon the thrust screw create opposing forces, the resultant of which is applied to a resisting mechanical spring. So long as the hydraulic pressure is below a predetermined value, the resultant hydraulic force acting upon the thrust screw is insufficient to overcome the resisting spring force and the thrust screw remains stationary.

Abstract: A self-adjusting, wear-compensating device for a floating caliper disc brake of the type having a pair of brake pads positioned to engage the disc brake rotor, the device including a rotor and a stator mounted in the caliper housing, the rotary motion of the rotor being converted to linear motion in the stator toward one of the brake pads, a threaded shaft is mounted in a threaded bore in the stator and has one end positioned to engage the brake pad and the other end extending into the rotor, and a one-way clutch is mounted on the other end of the shaft and is operatively connected to the rotor to impart rotary movement to the shaft relative to the stator whenever the rotor rotates more than a predetermined amount to advance the shaft an incremental amount, the clutch is protected from overload damage by a star ring mounted on the shaft in a position to allow the clutch to slip on the shaft.

Abstract: A cable control system including an adjustment device comprising a housing, a conduit fitting member mounted for reciprocating movement within the housing and adapted to be connected to the conduit of a cable system through which a cable strand extends. A spring yieldingly urges the housing in one direction. A ratchet gear is rotatably mounted in the housing and supports a pinion gear which engages teeth on the conduit fitting member. The ratchet gear has teeth with a pitch diameter greater than the pitch diameter of the teeth on the pinion gear and the teeth on the pinion gear are larger than the teeth on the ratchet wheel so that there are a greater number of teeth on the ratchet wheel than on the pinion. A removable ratchet detent engages the teeth on the ratchet wheel. In one form, the device automatically adjusts to change the tension on the cable conduit. In another form, the device is unlocked to provide an adjustment.

Abstract: An automatic adjusting device for a mechanically acutated sliding-caliper disc brake has a mechanically actuated device for moving the sliding caliper relative to the brake disc comprising an oblique-track spreading device which has an actuating shaft, an adjusting nut coupled to the actuating shaft through a rotational ratchet mechanism which is operative when the actuating shaft is turned in the brake actuating direction, the rotational ratchet mechanism being formed as a positive-engagement saw-tooth ratchet having structural arrangements made so that when the actuating shaft exceeds a certain torque one section of the coupling yields axially against the force of a precompressed spring without transferring rotational movement to the adjusting nut.

Abstract: An adjusting device for a disc brake comprised of a brake piston which, for the actuation of a brake shoe, is slidably arranged in a brake cylinder and which is actuatable by way of a hydraulic and a mechanical actuating device. Between the brake piston and the mechanical actuating device an adjusting member is provided which is composed of two adjusting elements interconnected by way of a thread without self-locking engagement. The adjusting member comprises a friction clutch having conical friction surfaces for fixation of one of the adjusting elements on mechanical actuation; and includes a spring which is supported on a stop formed fast with the housing and on a roller bearing seated on one of the adjusting elements. For the improved manufacture of the parts and in order to improve and facilitate the assembly, the accommodation sleeve comprises at least one groove extending substantially in the direction of the longitudinal axis of the accommodation sleeve.

Abstract: A torque limiting one-way clutch assembly including a bearing housing having a central bore and a number of grooves around the bore, each groove including a recess at one end, a ramp inclined toward the recess, a roller in each of the grooves, a spring assembly mounted on one end of the housing, the spring assembly including a flexible member extending into each of the grooves for bearing the rollers towards the recess, and a torque ring mounted on the outside surface of bearing housing and having an internal diameter smaller than the bearing housing to provide a frictional fit between the torque ring and the outside surface of the bearing housing.

Abstract: An automatic gap control apparatus for a disc brake with a parking brake comprises a cup-shaped piston having a bottom, the piston is slidably mounted inside the brake operating cylinder, a rod having a through hole slidably fitted inside the body, which is prevented from rotating and provided with a one-way reversible thread, a sleeve nut having a concave portion at an end thereof, which is provided at a front end thereof an abutting portion abutting against the bottom of the piston and threadably engaged with the one-way reversible thread of the rod thereby forming a length adjusting mechanism, a small piston having a large diameter head, which is fitted in the through hole of the rod, and the large diameter head is fitted in the concave portion of the sleeve nut, and a spring member provided between the cup-shaped piston and the sleeve nut, which urges the sleeve nut.

Abstract: A slack adjuster has a non-rotatable fast-threaded output member (19) threadedly engaged by a pair of nuts (20, 21), one of the nuts being a first brake-force-transmitting nut (20) clutchable to prevent rotation thereof and the other being a second adjustment nut (21) clutchable to land. Relative axial movement of these nuts relative to the output member (19) is a measure of "excessive" brake clearance and restoration of the normal spacing between these nuts serves to restore brake clearance to "normal". The nuts (20, 21) are housed in a housing (8) which is non-rotatable but axially movable with respect to the output member (19). The first nut (20) is clutchable to a thrust member (26) resiliently loaded with a force which is overcome only by forces of the magnitude of braking forces transmitted through the slack adjuster.

Abstract: A wedge and roller brake actuator comprises a wedge disposed between opposed tappets with interposed rollers acting to transmit thrust from the wedge to the tappets for brake actuation, a fixed inclined surface engaged by one roller to restrain the wedge for linear movement, and to ensure that one of the tappets normally associated, in use, with the brake trailing shoe, applies its associated shoe in advance of the other tappet, either the roller-engaging surfaces of the wedge and opposed tappet at either side of the wedge are inclined at different angles to the wedge longitudinal axis, or respective adjusters of the tappets are provided with different clearances between threadedly interengaged components thereof so that one tappet is adjusted to maintain its associated shoe nearer to the drum than the shoe associated with other tappet.

Abstract: A tread-brake unit copmrises, as a unitary structure, a brake shoe (300) for engaging a vehicle wheel tread, a brake actuator (100) having an output member (19) via which the brake shoe (300) can, firstly, be moved into engagement with the wheel tread and, thereafter, a braking force generated by the actuator (100) can be transmitted to the brake shoe (300), and a slack adjuster (200) by which clearance between the brake shoe (300) and the wheel tread, in the "released" condition of the unit, can be maintained substantially constant. The slack adjuster (200) has a pair of fast-threaded units (20,21), each nut being threadedly engaged with and rotatable on the output member (19) of the actuator (100).

Abstract: A slack adjustable operator for a spring applied disc brake has a spring motor operating a disc brake through a tubular pushrod having an over-running clutch permitting axial movement of the pushrod in a brake application direction, but not in a brake releasing direction. The over-running clutch operates in longitudinal load roller slots in the outer periphery of the pushrod and having a ramp load roller retaining ring slidable laterally on the outer periphery of the pushrod, the retainer ring being retained in a stepped bore of a housing to be laterally operable, along with longitudinal operation of the pushrod for brake release only to an extent to provide normal clearance for pads of the brakes, this limitation being effective to initiate threaded slack adjustment of the pushrod to compensate for wear of the brake pads.

Abstract: An assembly and disassembly system for a spring of a brake actuation unit, in particular for rail vehicles including a fluid pressure cylinder and a piston slidable in the cylinder. A cylindrical nut member is provided having a tubular portion extending outwardly of the piston. An output head is connected to the tubular portion and includes an outer tubular portion extending towards the piston. A compression spring is provided disposed between the tubular portion of the cylindrical nut member and the outer tubular portion of the output head. A sleeve member is disposed between the spring and the outer tubular portion of the output head. This sleeve is provided with a slot which extends in an axial direction along the sleeve. The outer tubular portion includes an opening which may be aligned with the sleeve slot. A member such as a pin is provided which extends through the opening into the slot holding the sleeve and the outer tubular portion in a position engaged around the spring.

Abstract: An automatic adjuster for the operation gap of a brake, comprising a piston slidably fitted in a cylinder, an adjusting nut supported in contact with the outer end of the piston the adjusting nut being rotatable relative to the piston, an unrotatable adjusting screw supporting a brake friction member at the outer end of the screw and engaged with the internal thread of the nut at the external thread to form a non-reversible screw-thread connection, the adjusting screw and the adjusting nut cannot rotate relative to each other by any force acting to the non-reversible screw-thread connection in the axial direction thereof, a drive screw connected to the cylinder through a friction clutch and engaged with the external thread of the nut at the internal thread to form a reversible screw-thread connection which has a backlash corresponding to the operation gap, the drive screw and the adjusting nut can rotate relative to each other by a force acting to the reversible screw-thread connection in the axial direction

Abstract: An automatic gap adjustment device for a disc brake comprising a cup-shaped piston which has a bottom in the fore end thereof and is arranged to move within a cylinder of a caliper, a sleeve which is axially disposed within the piston and is arranged to be carried by the piston when the piston is moved forward by the action of hydraulic pressure, and a spindle which is in screwed engagement with the piston and is arranged to rotate and screw out from the sleeve rearward relative to the piston. The automatic gap adjustment device is arranged to have the hydraulic pressure received as a moving force directed toward the rear part of the spindle, to have an adjuster piston arranged within a cylinder to push and cause a protruding end part of the spindle which protrudes toward the rear of the sleeve to engage an engaging part provided within the cylinder.

Abstract: An automatic adjusting device for a disc brake having a brake piston displaceably arranged in a brake cylinder for the purpose of actuation of a brake shoe. This device which is actuatable by means of a hydraulic and a mechanical actuating device, includes an adjusting member between the brake piston and the mechanic actuating device which member is composed of two adjusting elements, an adjusting spindle and adjusting nut interconnected via a thread without self-locking engagement. It further comprises a friction clutch having conical friction surfaces for fixing one of the adjusting elements in position on mechanical actuation. One of the conical friction surfaces is on one of the adjusting elements and the other friction surface is on a mechanically actuatable clamping member. It also comprises a bowl-type (cup-shaped) spring retainer which is secured to the brake housing by means of an accommodation sleeve.

Abstract: A brake adjuster wherein a thrust block is axially slidable in a cylinder bore and rotatably connected to one of two screw threaded adjuster members which are themselves interconnected by a self-sustaining thread. In use a power spring acts on the thrust block to move it axially within the cylinder bore to apply pressure to a friction pad via the adjuster members. The brake may be released by applying hydraulic pressure to the thrust block, at which time one adjuster member is rotated via a clutch, when a predetermined clearance has been taken up, relative to the other to adjust for pad wear. No relative adjustment occurs during application of the brake under the action of the power spring.

Abstract: The anchoring assembly comprises a sleeve to be coaxially fixed to one end of a conduit of a push-pull control cable from which an operating end of an inner cable projects, and having an external thread on an outer surface thereof. A locknut has an internal thread on the inner surface thereof engaging with the external thread of the sleeve, and is capable of being rotated and accordingly moved axially by an external force along an axis of the sleeve. A brake piece is movably passed through slidably by the sleeve in such a manner that a rotating movement thereof is restricted, which prevents the locknut from rotating. An outer cap comprises a holder and a snap-in device. The holder holds the brake piece and the locknut. The snap-in device has a snap portion.

Abstract: A railroad slack adjuster has a threaded rod, one end of which is adapted to be connected to one portion of a railroad car brake rigging and a tube telescopic with the rod and adapted to be connected to another portion of the brake rigging. A clutch member is rotatably mounted on the rod for engagement with opposing clutch surfaces on the tube. A housing is telescopicaly positioned about the rod, tube and clutch member. There are springs positioned about the tube and effective between the tube and housing to urge the tube inwardly of the housing. There are further springs positioned about the rod and urging the rod inwardly of the tube. A brake application tension applied at opposite ends of the slack adjuster to the rod and tube cause the clutch member to move between the tube opposing clutch surfaces as the slack adjuster lets out and takes up slack in the brake rigging during brake application.

Abstract: A brake adjuster for the automatic adjustment of vehicle brakes during the brake application stroke has a lever (13) which is connected to a brake cylinder (2) via a piston rod (1) and, via a slack adjuster (15), is connected to a cam shaft (4) with a brake key (5) for brake application. The slack adjuster (15) cooperates via a one-way clutch (20), a torque limiter (43) and a motion transmitter (28) with a control disc (39) which is fixedly connected to a bearing housing (9) for the cam shaft (4).

Abstract: An actuating device for a disc brake, in particular for automotive vehicles, has a rotatably supported actuating member and a transforming device for transforming a rotary motion into an axial motion. A part of the transforming device may be held by a holding element whereby the transforming device may be non-rotatable and axially displaceable. The holding element has a rotatably supported part fixed to the brake housing. Friction-reducing means is provided between the rotatable part and the element fixed to the housing.

Abstract: An automatic brake adjuster has a strut composed of two parts between which there is a non-reversible threaded connection, relative rotation between the parts to vary the strut length being controlled by a clutch ring urged by a spring into clutching engagement with the housing. In order to prevent unwanted de-adjustment, the clutch ring forms a uni-directional locking connection with a housing by means of ratchet teeth on the external periphery of the ring and a pawl mounted in the housing.

Abstract: The present specification discloses an actuator for use in a vehicle brake. The actuator incorporates an adjuster which automatically provides an adjustment to take account of pad lining wear, to thus maintain a substantially constant brake clearance. The brake actuator of the present invention comprises a hollow piston which is axially slidably located in a cylinder with an elongate shaft extending axially through said cylinder and said hollow piston. Said shaft is fixed in a position within the cylinder and carries a spiral thread and axially extending splines. An adjuster nut is rotatably mounted on said spiral thread and is engaged by detent means mounted on said axial splines. Said detent means are spring biassed against the adjuster nut by a spring which engages said piston.

Abstract: A combination in-line brake slack adjuster and air chamber for connection to a vehicle brake shaft lever arm includes an air chamber and a piston movable in the air chamber. The slack adjuster is of the compression type and is coaxially attached at one end to the piston and at the opposite end is adapted for connection to a vehicle brake shaft lever arm. The slack adjuster reacts to a coaxially applied brake application force by the piston to apply a force to the brake shaft lever arm and automatically takes up and lets out slack as determined by movement to a full brake application position to maintain a generally uniform travel of the piston during brake application.

Abstract: The rotating member (17) of the automatic adjustment device interacts in frictional engagement with a non-rotating plunger (8) of the mechanical control device (9), the adjustment member locked in rotation (18) of the automatic adjustment device having an end (19) passing sealingly and slideably through the front wall (4) of the brake piston (1) and maneuverable (38) manually to carry out resetting of the automatic adjustment device, the adjustment member locked in rotation (18) being pushed in frictional connection (30, 31) with the brake piston (1) to be normally locked in rotation when the brake motor is in operation.

Abstract: The adjusting device (7) comprises a screw (8) and a nut (12) engaged in a housing (16). The latter and the screw cooperate with a fixed part and a movable part. The locking system comprises a locking cylinder (23) provided with inner screw threads (24-26) conjugate with outer screw threads (22) of the nut (12), and in these two series of screw threads complementary axial splines are provided so that the locking cylinder (23) locks the nut (12) against rotation when their screw threads and respective splines are in engagement with each other. The locking cylinder (23) may be controlled by a cable (29). Application in the locking in particular of adjusting devices for table guides of woodworking machines and seat structures of vehicles.