Abstract: A gear support device of an automatic transmission reduces vibration and noise that are generated in a planetary gear set when power is transmitted from a vehicle driving source. In particular, the gear support device includes a gear support which is disposed on an outer peripheral surface of a hub retainer coupled to a planetary gear set directly connected to an input shaft of a transmission. The gear support rotatably supports the hub retainer by contacting with the outer peripheral surface of the hub retainer at every predetermined interval in a circumferential direction of the hub retainer.

Abstract: A brake caliper cover to cover the calipers of vehicles having disc brakes. The cover has a mount formed by a body having two ends configured to each engage with the two guide pins for the brake pads housed in a cavity of the caliper. The cover engages to the body of the mount using one or a plurality of supports engaged to the cover which are removably engageable to connectors on the mount.

Abstract: An automatic transmission is provided. The transmission includes clutches coaxially arranged in layers in a radial direction of the transmission. The transmission includes a piston provided to each clutch, the pistons being aligned in the radial direction on a same plane perpendicular to an axis of the transmission, without overlapping with each other in an axial view. The transmission includes a common rotational member having a wall, commonly used for the clutches, and disposed at a predetermined position of the transmission in an axial direction, wherein the wall is formed along the plane. The transmission includes operational hydraulic passages parallely arranged in the wall of the common rotational member in a circumferential direction of the transmission on the same plane perpendicular to the axis, each of the operational hydraulic passages communicating with one of operational hydraulic chambers of the respective clutches.

Abstract: A bicycle rim brake comprises a first shaft, a second shaft, a first brake arm, a second brake arm, and a reinforcing member. The first shaft includes a first fixed end part fixedly provided with respect to a bicycle body. The second shaft includes a second fixed end part fixedly provided with respect to the bicycle body. The first brake arm is pivotally provided on the first shaft around a first pivot axis. The first brake arm has an opposite surface opposite to the first fixed end part. The second brake arm is pivotally provided on the second shaft around a second pivot axis. The reinforcing member couples the first shaft to the second shaft. The reinforcing member is provided such that the first brake arm is at least partially arranged farther from the first fixed end part than the reinforcing member.

Abstract: A retraction clip comprising: (a) an attachment feature and (b) a retraction feature connected to the attachment feature; wherein the attachment feature attaches the retraction clip to a component of a brake system so that the retraction clip assists in retracting a brake pad after a brake apply.

Abstract: A device (1) for retracting a piston (2) for a brake caliper, said device comprising an annular seat (26) coaxial with the piston seat, said annular seat having an axial abutment surface (40) perpendicular to said axial direction and arranged in the direction of output of the piston (2), and a radial bottom surface (28) arranged facing said side surface (11) of the piston, at least one elastic element (12) arranged in said annular seat (26), with a first radial surface thereof (13) in contact with force against said side surface of the piston, and with a second radial surface thereof (14) in contact with force against said radial bottom surface (28) of the annular seat (26), at least one elastic ring (21) housed in said annular seat (26) and axially arranged between said at least one elastic element (12) and said axial abutment surface (40), on the opposite side to the brake fluid, said ring (21) having an inner perimeter surface (41) and an outer perimeter surface (42), between said inner perimeter surface (

Abstract: A device for indirectly sensing tension of a chain in a railroad handbrake includes an elongated bore formed through a holding pawl of the handbrake, sensor target attached to the holding pawl and a sensor mounted in close proximity to an upper end of the housing so as to sense the sensor target. The ratchet wheel of the handbrake positions the sensor target for operative sensing alignment with the sensor during at least partial handbrake application. A biasing member moves the sensor target away from the operative sensing alignment during handbrake release.

Abstract: A brake actuator has a motor that provides input rotation in first and second directions. A reducer couples to the motor and reduces the input rotation into an output rotation to be applied to a brake screw of a progressive cavity pump drive. A sensor measures rotational speed of the drive shaft. In manual operation, an operator can view an indication of the rotational speed and can manually operate the motor accordingly to control rotation of the shaft. In automated operation, a controller automatically controls the motor based on the rotational speed measured by the sensor. The controller can also use a torque sensor to detect the torque applied to the brake screw, a displacement sensor to detect displacement of the brake screw, and/or a current sensor to detect the current consumption of the motor.

Abstract: A drum brake (10) is provided which has a pair of brake pads (12), each pad being moveable generally radially outwardly into contact with a brake drum by a respective operating lever (14) which is acted on at one end by a brake applying means (15) and pivoted (16) at the other end from a backplate (11). Each pad is contacted by a portion (14c) of the respective operating lever intermediate the lever ends and is moved radially outwardly between a pair of circumferentially spaced abutments (45) which extend generally perpendicular to the backplate (11) and which react braking torque when the brake is applied. The required pad to drum clearance is established by knock-back of the drum on the pads (12).

Abstract: Disclosed is a disk brake for a vehicle having a manual release unit, capable of manually releasing the contact of a disk and a friction pad which are locked in a braking state. The disk brake includes a disk rotating together with a wheel of the vehicle, a friction pad which makes contact with a side surface of the disk to generate braking force, a wedge member to which the friction pad is attached, a drive motor which generates driving force to move the wedge member in a direction of the disk, a power transmission part which sifts rotational motion of the drive motor into a linear motion of the wedge member, a pad compensation part which maintains a uniform gap between the friction pad and the disk, and a manual release part installed in the pad compensation part such that contact between the friction pad and the disk is manually released when the friction pad and the disk are locked in a braking state due to friction between the friction pad and the disk.

Abstract: An actuator assembly for use with a transmission drive system having a pair of transaxles where each transaxle includes an electric motor and a brake release pin extending from a brake housing, where the release pins are both moveable from a first, engaged position to a second, released position. The actuator assembly includes a support bracket fastened to each transaxle, a sleeve attached to the support bracket and arranged generally parallel to the axes of the first and second release pins, a rod moveably disposed within the sleeve and extending from each end thereof, a pair of levers engaged to the two release pins and to the rod, a fulcrum attached to the support bracket, and an actuator arm engaged to the rod and pivotable about the fulcrum to longitudinally move the rod within the sleeve, wherein the actuator arm is moveable.

Abstract: An electromagnetic brake includes a housing, a pin, brake springs urged against the pin, a handle pivotably secured to the pin, a coil, a moveable armature plate, a moveable friction disc, a trigger switch on the housing and including a projecting contact and a pivotal trigger, steel balls in the half holes of the housing and the handle, and a rod fixedly projecting out of a slot of the handle. In a brake released position, the rod is at one end of the slot with the coil being energized. The handle is adapted to pivot to move the other end of the slot to engage with the rod, the handle contacts and pivots the trigger to enable the trigger switch so as to de-energize the coil, and the springs apply an expansion force to urge against the pin for causing the friction disc to apply brake to a shaft.

Abstract: A motor and brake assembly having a disengaging mechanism for use with RV's are disclosed. The assembly includes a motor and a disengaging mechanism that is mounted thereon. The disengaging mechanism includes a motor mount comprised of a cylindrical piece with a plurality of holes disposed on the periphery of an outer flange of the cylindrical piece. The cylindrical piece extends over the barrel of the motor and is secured to the barrel with a plurality of screws. Through manipulation of the cylindrical piece, the user can selectively engage or disengage the brake from the motor.

Abstract: A manual release mechanism for an electric braking assembly is provided. In various implementations, the manual release mechanism includes a shaft having an armature retraction cap connected to a distal end of the shaft and a handle connected to a proximal end of the shaft. The shaft includes threads that are mateable with threads provided in a bore of a magnet body of the braking assembly. The shaft threads are formed along at least a portion of the shaft such that a small angular displacement of the handle will cause an axial translation of the shaft within the magnet body. The axial translation will move the retraction cap to exert force on an armature plate of the braking assembly. The force of the retraction cap on the armature plate disengages contact between the armature plate and a friction disk of the braking assembly allowing the friction disk to rotate freely.

Abstract: An actuating assembly for an electronic parking brake includes a housing and motor secured to the housing and having an output shaft. A cable assembly is rotatably driven by the motor. A cable is anchored at a first end to the cable assembly and wraps around the cable assembly as the cable assembly rotates in a first direction. A first spring is secured to the cable assembly such that it is rotatable with the cable assembly. A drum receives the first spring, which is engageable with an interior surface of the drum to prevent rotation of the cable assembly. A plurality of grooves is formed on a surface of the drum. At least one roller element is positioned in a groove of the drum. A spring housing receives the drum and is secured to the housing. Each of a plurality of apertures in the spring housing receives a roller element.

Abstract: A motor and brake assembly having a disengaging mechanism for use with RV's are disclosed. The assembly includes a motor and a disengaging mechanism that is mounted thereon. The disengaging mechanism includes a motor mount comprised of a cylindrical piece with a plurality of holes disposed on the periphery of an outer flange of the cylindrical piece. The cylindrical piece extends over the barrel of the motor and is secured to the barrel with a plurality of screws. Through manipulation of the cylindrical piece, the user can selectively engage or disengage the brake from the motor.

Abstract: A cable control which can be mounted in a simple manner in an expanding lock of a braking device for a motor vehicle, a so-called cable slack of the cable end is required in the area of the expanding lock. For eliminating this cable slack again in a simple manner, a holding device is provided in the wheel carrier which comprises a sliding sleeve and of a fixing sleeve, between which locking devices are arranged, so that the cable slack can be eliminated when the sliding sleeve is slid in the fixing sleeve.

Abstract: A parking brake operating device for vehicle, wherein a vehicle is held by a specified braking force by manually rotating a brake lever (2), a held state is released by rotatingly operating the brake lever (2) upward by a specified amount from the held state, and the braking force can be changed to an increasing side and held by further raising the brake lever upward from the held state beyond the specified amount, whereby a release operation can be performed without using a push button or a push rod.

Abstract: To provide a brake cylinder unit wherein both the normal brake and the spring brake that is used as a parking brake, etc., can act, and in addition wherein it is possible to shorten the axial direction length. In a brake cylinder unit (1) wherein both the normal-service brake means (2) and the spring brake means (3) can act, there is provided a clutch means (4) that links the rod (111) and the second piston (21) when the pressure fluid ceases to act on the second action chamber (24) of the spring brake means (3), and the first piston (21) starts to move towards to the rod (111). This clutch means (4) comprises a screw (31) that is provided on the rod (111), a nut member (32) that is provided on the second piston (21) such that it can rotate, and a stop means (33) that stops the rotation of the nut member (32) when the second piston (21) starts to move towards the rod (111).

Abstract: A spring brake cylinder having an emergency release device, particularly for rail vehicles, comprising: a housing; a spring piston for operating and releasing a spring brake; a normally locked, not self-locking threaded screw drive; an outer-radial sliding surface having a detent flank, the outer-radial sliding surface being an element of a rotatable part of the threaded screw drive, and the threaded screw drive having a pitch dimensioned such that the rotatable part carries out less than a complete rotation along its maximal axial adjusting stroke, and the detent flank being configured for locking the emergency release device; and a latch for interacting in a form-locking manner with the detent flank to lock the emergency release device, and for releasing the spring brake in the absence of a release pressure medium and thereby permitting axial movement of the spring piston.

Abstract: A brake assembly utilizes a conical brake drum and matching conical brake lining assembly to provide a more efficient braking system. An adjuster mechanism with a pair of conical adjuster members is controlled by an electric motor and worm gear drive. As the lining wears, the adjuster mechanism pulls the conical adjuster members towards one another to force the brake linings outwardly to maintain a predetermined distance between the drum and the brake lining assembly.

Abstract: A vehicle brake assembly has a rotor that mounts to a shaft of the vehicle for rotation with it. The rotor has an annular braking surface. A hydraulic piston is non-rotatably mounted to the vehicle. The piston is movable axially relative to the rotor and has a braking surface for frictional engagement with the braking surface of the rotor when hydraulic fluid pressure is supplied to the piston. A coil body having an electromagnetic coil is axially movable relative to the rotor. A coil plate is mounted adjacent the coil body and is attracted to the coil body when electrical power is supplied to the coil. A coil spring is mounted between the coil plate and the coil body. The coil spring moves the coil plate away from the coil body causing braking action when the electrical power is removed from the coil.

Abstract: A device provided with a pedal arm (2) having pawl teeth (12), a latch pawl member (4) having a latch pawl (15) engageable with the pawl teeth (12) for maintaining and releasing a stepped-on position of the pedal arm (2), and a position changing member (5) for allowing the latch pawl member (4) to maintain the position of the pedal arm (2) when the pedal arm is further stepped on from a maintained position. The above constitution realizes a function of setting a braking force by a stepping operation, a function of releasing a braking force by a stepping operation and a function of increasing a braking force by an additional stepping operation.

Abstract: An apparatus for the application of a braking force to a wheel of a wheelbarrow, hand cart or other type of a cargo portage device includes a twist grip mechanism with a latching type of a ratchet attached to the handlebar of the device. As the twist grip mechanism is rotated a progressive braking force is applied to the wheel by tightening a brake band that extends around a drum that is attached to the wheel. A cable is attached at one end to the twist grip mechanism and to the brake band at its remaining end. The ratchet maintains the braking force that is applied until a thumb release lever is depressed which disengages a ratchet dog from contact with any of a plurality of ratchet teeth.

Abstract: A brake controlling mechanism for a cart having a conventional handle mounting bracket defining a handle mounting axis. A core is shiftably coupled to the handle mounting bracket and rotatable about the handle mounting axis. An elongated handle is coupled to the core offset relative to the handle mounting axis.

Abstract: The electric park brake of the present invention includes an electric caliper motor assembly. The electric caliper motor assembly includes a motor, which is operably coupled to a shaft. The motor and shaft are surrounded by a housing. A friction wheel is disposed axially and operably connected to the shaft within the housing. A park brake motor is disposed within a second housing. The second housing is connected to the first housing and positioned laterally in relation to the shaft. An acme screw is operably coupled to the park brake motor wherein the acme screw interacts with an acme nut. A lever is in juxtaposition to the acme nut and friction wheel. The lever is angularly displaced by the acme screw interacting with the acme nut to frictionally interact with the friction wheel when the park brake motor is activated. This provides a park brake feature and prevents movement of the shaft.

Abstract: An apparatus for operation a railway car vertical wheel hand brake. A hand brake wheel has a hub fixed on an operating shaft. The operating shaft is rotatably mounted on the hand brake. The hand brake wheel further has a reaction member. A brake release mechanism is fixed on a brake release shaft that is rotatably mounted on the hand brake. The reaction member is engageable with the brake release mechanism when the hand brake wheel is rotated, whereby the position of the brake release mechanism will provide a visual indicator of the brake status.

Abstract: A brake device in a skateboard cart comprises a square fixed base, a brake cover, and two springs. The fixed base has an upright side and a projection ear with an engaging hole extending outward from an upper part of the upright side horizontally. Two circular grooves are provided at two lower corners of the upright side respectively and the fixed base is fixedly attached to a rear part of the skateboard cart. The brake cover has lower end is pivotally engaged to the engaging hole of the projection ear. These two springs are received in these two circular grooves respectively and urge against the lower end of the brake cover. The brake cover can be operated smoothly and conveniently to keep away the rear wheel of the skateboard cart by way of resilient forces of the two springs urging against the lower end of the brake cover in case of the brake cover being not pressed by a foot.

Abstract: An elevator drive includes a casing with a shaft supported by spaced shaft bearings. Arranged on the shaft between the bearings are a traction sheave and a brake disk. On a free end of the shaft is a motor ventilated by fans. Arranged on the casing is a symmetrically constructed braking device with two single-arm brake levers having brake linings which, when braking occurs, press against the traction sheave and bring it to a standstill. Provided on a free end of each brake lever is a compression spring that is supported at one end on the brake lever and on the other end on a spring pin. The spring force of the compression spring acts on the brake lever thereby causing the brake lining to press against the traction sheave. To release the brake lever, a brake magnet provided with an armature plate is arranged on a brake lever, the brake magnet and the armature plate acting against the force of the compression springs.

Abstract: An annular disk brake assembly having a housing mounted to a vehicle and a rotor disk mounted to a wheel of the vehicle. Annular brake pads extend parallel to the rotor disk within the housing and are mounted thereto with at least one brake pad being movable axially by an oil applied bladder mounted to the housing to move the first brake pad axially against the rotor disk. The rotor disk is adapted to slide axially to engage the second brake pad when pressure is applied to the rotor disk by the first brake pad and the bladder.

Abstract: A motor brake apparatus includes an improved torque adjustment mechanism. The adjustment mechanism includes an adjusting nut having a outer ring groove aligned with an inner ring groove defined in a receiving bore of the brake housing structure. A snap ring is located in the aligned grooves to connect the housing structure and adjusting ring while allowing free rotation therebetween. Inner threads of the adjusting nut engage outer threads of a spring pushing element such that rotation of the adjusting nut causes axial movement of the pushing element. The pushing element engages one or more springs which are thereby compressed or released, depending on which axial direction the pushing element is moved. The spring force varied in this manner results in varying levels of braking torque.

Abstract: A wire return spring for providing bias for brake shoes in a drum brake system urging the brake shoes to deactuated positions, with the wire spring having a circular like contour as assembled with the brake shoes.

Abstract: In order to indirectly open brake shoes (3, 4) through a link (19) pivoted on one of the brake shoes (3) at a location of a brake shoe holding mechanism (5), and to operate the brake shoes (3, 4) away from a shoe gap adjuster (11) while one of the brake shoes (3) is kept abutting against an anchor member (10), when rotating a lever (20) with a force (W) and operating a wheel cylinder (16) to operate brake shoes (3, 4), a moment of rotation caused by the return spring (13) is set to be larger than a moment of rotation caused by the return spring (15).

Abstract: A hydraulic caliper disk brake (10) according to the present invention includes a caliper base (46) that is supported by a folding triangular base (14) that generally includes a mounting base (30) and a support arm (54). The caliper base (46) is pinned to the mounting base (30) and the support arm (54) such that the caliper base (46) may pivot about the mounting base (30) when the pin connecting the support arm (54) to the mounting base is removed. The configuration allows the caliper assembly (12) to be pivoted out, away from a brake disk (16) such that the friction pads (142, 242) may be easily replaced. The caliper assembly (12) includes a self-activating wear adjuster (172) that functions to maintain a constant brake gap (174) between an active friction pad (142) and the brake disk (16). The caliper assembly (12) also includes a wear indicator in the form of a spring (134) that provides additional force that is fed back to the user when the friction pad (142) is significantly worn.

Abstract: A caliper disk brake for steel mill cranes includes a pair of armatures having an electromagnetic coil and a spring interposed between them to operate in a clamshell fashion. The spring urges the armatures apart, while actuation of the coil urges the armatures together. Each of a pair of caliper arms is pivotally connected to a respective one of the armatures at one end thereof, and has a pressure plate pivotally maintained at an opposite end. The pressure plates are maintained in juxtaposition to wear pads which are axially movable in apertures maintained in a pair of stationary plates. A disk, adapted for interconnection with the shaft of a steel mill crane hoist motor is positioned between the plates and wear pads.

Abstract: The present invention is a fail safe motor brake for use with relatively large industrial motors, and particularly electric hoist motors as used with large overhead industrial cranes. The present brake includes an actuation linkage which results in relatively little change in the initial height or "air gap" of the solenoid plunger or armature, as the brake linings wear. The limited change in the air gap is due to a mechanical stop which is built into the adjustment and actuation linkage, as well as the clamping pressure provided by the spring arrangement which serves to actuate the brakes. The solenoid of the present brake is offset from the plane of the brake shoes, thus allowing removal and replacement of one or both shoes without need to remove the solenoid. This allows the brake shoes to be removed without need to readjust the actuation linkage. The present motor brake provides excellent performance throughout the life of the brake linings, without need to adjust the actuation linkage during this period.

Abstract: A drum brake device having a single brake shoe mounted to be movable on top of the back plate. One end of the brake shoe abuts against an anchor (10) and the other end interlocks with a shoe clearance adjustment device (14). A link (11) is supported so as to pivot in the central region of the brake shoe (3). One end of the link (11) is interlocked so as to be activated by a service brake actuator (12) itself activated when the service brake is applied, while the other end of the link (11) abuts against the anchor (10). When the brake drum is rotating in one direction, the other end of the brake shoe (3) is supported by the anchor (10), and when the brake drum is rotating in the reverse direction, the one end of the brake shoe (3) is supported by the shoe clearance adjustment device (14).

Abstract: A connector for a spring brake actuator comprises a threaded bolt having at least one flat portion on an outer surface thereof, a nut having a threaded central aperture threaded onto the bolt, and an embossment on the nut, extending inwardly of the central aperture to frictionally engage the flat portion of the bolt, so that the embossment prevents rotation of the nut with respect to the bolt. A method for fixedly attaching a nut onto a bolt comprises forming a flat portion on an outer surface of the bolt, threading the nut onto the bolt in alignment with the flat portion, and pressing inwardly of the nut with a punching tool to cause a portion of the material of the nut to extend inwardly of the central aperture forming an embossment in engagement with the flat portion on the bolt to hold the nut rigid with respect to the bolt.

Abstract: A brake (30) includes a magnetically permeable body (38) having a pole face (40), an armature (42) axially movable toward and away from the pole face, an energization coil (44) energizable to magnetically attract the armature toward the pole face, biasing members (50) biasing the armature away from the pole face, a pressure plate (64) mounted to the body and axially spaced from the pole face, a friction disc (66) between the armature and the pressure plate and keyable to an axially extending rotary shaft (36), such that upon deenergization of the coil, the biasing members bias the armature to a braking position pushing the friction disc against the pressure plate to stop rotation of the disc and shaft, the armature in the braking position defining an air gap (80) between the pole face and the armature, and such that upon energization of the coil, the armature is pulled through the gap toward the pole face to a released position releasing the disc and permitting rotation of the shaft.

Abstract: A retraction mechanism for a disc brake assembly which applies a generally constant restoring force urging the brake shoes apart from one another regardless of the amount of wear of the friction pads. The disc brake assembly includes an anchor plate upon which a caliper is slidably mounted. The caliper is formed having an inboard leg and an outboard leg. A cylindrical recess is formed in the inboard leg of the caliper, within which a piston is slidably supported. A pair of brake shoes are disposed adjacent to the inboard and outboard legs of the caliper, and a rotor connected to a rotatable wheel extends therebetween. A mechanism is provided for selectively moving the brake shoes into frictional engagement with the rotor to retard or stop rotation thereof. The retraction mechanism includes a pair of retractor clips which are mounted on the anchor plate for spreading the brake shoes apart from one another when the disc brake assembly is subsequently released.

Abstract: A braking device for a two-wheeler, such as bicycle which comprises a pair of left and right arms pivotally attached to a frame of the two-wheeler, each having on its distal end portion a brake shoe, and a spring for energizing the arms to move toward brake releasing direction. This braking device is characterized in that one of the arms is more strongly energized by the spring than the other arm is, and that a stopper is provided to restrict the extent of the movement of the strongly energized arm toward the brake releasing direction, so that, when arms are being set back to the unactuated original state, this strongly energized arm is stopped of its movement by the stopper before the other arm finally returns to its original state.

Abstract: In a duo-servo drum brake comprising a mechanical expander adjacent a thrust bearing for supporting the brake shoes, with the expander including an operating lever to which is transmitted the operating force of an actuator substantially in a direction tangential to the edge of the brake drum. The brake shoe is movable through an expander in the direction of the operating force and connected to a thrust bearing through a prestressed spring. The spring force of the prestressed spring opposes the expanding force of the expander and exceeds the operating force required for placing the brake shoes in abutment with the brake drum on the operating lever.

Abstract: A constant tensioning device in the form of an elastic member interposed in the handbrake chain between a railway car handwheel and a handbrake lever of the railway car brake apparatus for maintaining tension in the handbrake chain in accordance with the applied handbrake force, irrespective of such shifting of the railway car relative to its truck, as would otherwise cause slack to develop in the handbrake chain and thereby cause an undesired loss of handbrake force.

Abstract: A brake band retainer mechanism for an automatic washer is provided which ensures that the brake band will be held away from the brake drum when the brake is in the relaxed position, yet will be held close to the drum for ready engagement. A support frame for the brake assembly has four legs, one of the legs pivotally carrying a bracket to which the band is attached, two opposite legs have a flange thereon providing radial and vertical support for the band in its relaxed position, and a fourth, intermediate leg carrying a resilient member which presses against an outer surface of the band to bias the band against the support flange surfaces when the band is relaxed. The resilient member is held on the fourth leg without additional fasteners.

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

Abstract: A brake retention pin rotatively mounted in a brake shoe having a spring cam portion secured to the brake retention pin where the spring cam engages a brake return spring hook as the brake retention pin is rotated thereby extending and translating the return spring for engagement with the retention pin.

Abstract: A drum brake assembly including a brake member comprised of a substantially circular shoe having a radially outer face on which at least one lining is mounted. The shoe is made from a high strength resilient material and is of substantially constant cross-section along its entire length. The brake member is arranged to be diametrically expanded by an actuation device on the brake assembly. When the actuation device is released the resilience of the shoe material causes the shoe to diametrically contract. The lining may be machined to a circular form prior to the brake member being fitted to the brake assembly, and that machining is preferably done after the shoe has been expanded a predetermined extent. The disclosure extends to a method of manufacturing a brake member and to a brake member for a drum brake assembly.

Abstract: An internal shoe drum brake having a generally C-shaped shoe return spring of which an intermediate portion is retained on the backplate and respective end portions respectively engage brake shoes. The intermediate portion of the spring is retained by a retention device secured to the brake backplate and has opposed tongues embracing a portion of the spring in such a manner as to retain the spring relative to the backplate in directions generally parallel to the latter. The retention device also retains the spring in a direction perpendicular to the backplate and may be associated with or embody a mounting device for an electrical component.

Abstract: A motor brake mechanism (10) includes retaining structure (46) permitting removal and replacement of friction discs (16, 18) without disassembling the brake mechanism. When the brake mechanism is detached from the motor, removal of a single bolt (46) permits radial removal and replacement of the friction discs. Minimizing of brake drag is enabled by adding low force compression springs (162, 164, 166, 168, 170, 172) without otherwise modifying the structure which prevents rotation of the pressure plates (38, 40) relative to the end plate (28) of the brake mechanism (10), wherein a first set of studs (42, 44, 46) provide both functions of non-rotatably mounting the pressure plates (38, 40) to the end plate (28) and mounting the low force compression springs, all separate from another set of studs (70, 72) mounting the brake lever (68) to the end plate (28).

Abstract: A drum brake is provided of the leading-trailing shoe type in which a single piece spring installed as a part of the assembly holds down the brake shoe assemblies against the backing plate and also retracts the shoes after brake actuation. The single piece spring also retains the lower ends of the shoes against the anchor plate. This arrangement eliminates the need for separate shoe hold-down springs and separate upper and lower return springs, resulting in a significant reduction in parts and labor for assembly.