Abstract: A disk brake pad and backplate assembly comprises a metal backplate formed with a number of abutments projecting from one face thereof, and a disk brake pad of a fully cured friction material composition, one face of said disk brake pad being provided with recesses wherein said abutments are received, together with a layer of an elastomeric adhesive to bond said pad to said backplate.

Abstract: An improved disc brake pad backing plate assemblage of the dovetail type wherein dovetail end strength for resisting deformation is increased by the use of a special secondary backing plate member in conjunction with a primary backing plate member having a dovetail for mating engagement with the dovetail groove in a disc brake holder. The resultant absence of dovetail end deformation facilitates removal of the disc brake pad from the mating dovetail groove.

Abstract: An improved brake actuator is disclosed that automatically adjusts for brake pad wear, thereby retaining a given retraction space from a fully actuated position. The actuator is hydraulically actuated and the components for positive retraction are housed within the hydraulic actuator, thereby protecting the components from the elements. The brake actuator has particular application for a ring brake having opposed cylindrical braking surfaces. An improved self-locking brake pad is also disclosed.

Abstract: A floating-frame spot-type disc brake is described comprising a floating frame (1) guided in a manner axially displaceable on a brake carrier (12), and being furnished with two brake cylinders (2, 3) and two brake pistons (4, 5) directly acting on two axially inwardly disposed brake shoes (6, 7). The brake carrier (12) is located entirely on one side of the brake disc and no portion extends across the outer edge of the brake disc (15), so that the maximum diameter of the brake disc is limited only by the relatively thin sections of the floating frame (1) extending across the outer edge of the brake disc. Additional brake shoes (8, 9, 22), on the axially outer side, are fixed to the floating frame (1), in turn transmitting the circumferential force acting on the outer shoes occurring during braking through a bolt guide (10), into the brake carrier (12).

Abstract: A mechanical brake for a hoist and traction machine, which is provided with brake releasing force control layers at braking surfaces of a driving member opposite to lining plates. Each of the brake releasing force control layers comprising a heat-treated plating layer made of nickel phosphate, nickel chromium or chromium, so that the surface condition of each braking surface of the driving member can be controlled and the surface hardness can be controlled, whereby an initial force for the brake releasing during the lowering of a load or the releasing traction of a load is adapted to be lower.

Abstract: The invention relates to the replaceable element which bears against a rotating disc or rotor as part of a disc brake system for a vehicle. The replaceable element includes a backing plate and a friction pad. Unlike typical systems which rivet the pad to the backing plate, the backing plate has integral upstanding fixation studs or nips. The nips are made in the plate by a semi-piercing operation to give an upstanding stud or nip. The nip is then caused to cold flow in a pressing operation to provide a cylindrical collar at the end of the nip. To affix the friction pad to the backing plate an anvil similar to a riveting anvil is forced against the cylindrical collar to turn the collar over to contact the fixation surface of the typical bore holes in the friction pad. Because rivets are eliminated the fixation process can be conducted in a single stroke of a press.

Abstract: The present invention relates to a method of manufacturing a composite frion element wherein a powdered solventless thermosetting adhesive is applied to a metal substrate and the product made therefrom. The metal substrate and thermosetting adhesive material are heated to allow the powdered solventless adhesive material to flow but not crosslink. A friction material is applied under heat and pressure to the adhesive material such that the adhesive material crosslinks and a composite friction element is formed.

Abstract: The present invention relates to a brake shoe assembly with a sealing liner having a brake shoe (11) which includes a brake shoe table (13). A sealing liner (45) formed from an adhesive material is applied to the convex surface (31) of the brake shoe table (13). A friction brake liner (50) is positioned over the sealing liner and convex surface (31) of the brake shoe table (13) and is secured to the brake shoe table (13) by fasteners (61). The sealing liner forms a moisture barrier between the friction brake liner (50) and the brake shoe table (13) to retard the passage of moisture therethrough to prevent rust and corrosion of the brake shoe (11).

Abstract: A low profile disk brake caliper in which a disk brake pad is mounted on a flexible diaphragm contained within a piston cavity. Pressurization of the piston cavity by a master cylinder expands the diaphragm and urges the brake pad sidewardly from the housing to engage an adjacent rotor. In the preferred embodiment, the diaphragm is received within a cap seal slidably mounted within the cavity, and the brake pad is mounted removably within a pad carrier attached to the cap. A backing seal is positioned adjacent to the underside of the top wall of the diaphragm and is clamped against the cap by assembly bolts, so that the top wall of the diaphragm is compressed between the cap and backing seal, thereby preventing the top wall from bulging outwardly when the cavity is pressurized. The housing is mounted on the hub of a bicycle front wheel and includes a set screw positioned for camming engagement against the front fork to prevent rotation of the brake caliper relative to the fork.

Abstract: This invention relates to brake components having mechanically detachable friction members. The friction member of the present invention has a plate with a plurality of apertures. This apertured plate has a first surface that abuts a mounting surface on a brake shoe member or the like. The apertured plate has a second surface, opposite of the first surface, with friction material affixed thereto. The apertured plate is detachably fastened to the mounting surface by fasteners, thereby detachably fastening the friction member thereto.

Abstract: A tread brake shoe for a railroad wheel has a cross-section with a bidirectional laminate structure, which includes a core element of a high-friction material for contacting the wheel tread and, at least one low-friction element positioned on the high-friction material sidewall for contact with the wheel flange and to inhibit wheel flange contact with the high friction material.

Abstract: Method of processing brake pads having a lining member mounted on a back plate is disclosed. An exposed surface of the lining member initially having a substantially planar configuration is heated to a warping temperature between substantially 300.degree. C. and substantially 800.degree. C. to be permanently warped the brake pad into a substantially concave configuration. Then the exposed surface of the lining member is ground into a substantially planar configuration, while maintaining the warped condition of the brake pad.

Abstract: A single disc, single acting brake or clutch has one or more pneumatically actuated piston and cylinder assemblies for urging friction material into contact with a disc that is rotatable relative to a body which carries the piston and cylinder assembly.

Abstract: The invention relates to friction pairs of machine parts.A friction element of a friction pair comprises a three-dimensional framework (1) embedded in a matrix (2) in the zone of the friction surface (4).The framework (1) is made from a wear-resistant material and the matrix (2) from a material with high heat conductivity coefficient. The framework (1) has a cellular shape formed by a honeycomb structure, a corrugated strip and the like. The framework rises partially above the surface of the matrix forming, together with the latter, a friction surface (4) possessing a regular microrelief. The area of the framework (1) rising above the matrix (2) diminishes proportionally in the direction from the maximum load zone towards the minimum load zone.The invention can be used in braking mechanisms, in particular in brake disks and drums of passenger cars, in disks of friction clutches and the like.

Abstract: A pad assembly for a disc braking system, including a backing plate having protrusions extending upwardly therefrom and with irregular surfaces and a composite brake pad molded in situ onto the braking plate, the composite material of the pad encapsulating the protrusions so that upon thermal expansion during use, the pad will not separate from the backing plate.

Abstract: A brake block for automotive drum brake systems having a visible wear indicator indicating the remaining usable thickness of the brake block. The wear indicator may be molded or machined into the side of the brake block and also may indicate where the tops of the fasteners for the brake block are located when fasteners are used to affix the brake block to a backing plate.

Abstract: A brake shoe and friction pad that permits removal and replacement of the pad without removing the brake drum or the shoe from its position within the drum by employing spaced upstanding lugs on one end of the shoe and spaced openings on the other edge. The pad has complementary lateral ears on one edge to engage between spaced lugs and complementary bottom projections adjacent its other edge to engage the spaced openings. Further circumferential support is provided by bolts secured inside each flange near the ends of the pad in a manner that permits removal without separating shoe from drum.

Abstract: A brake shoe for bicycles having a shoe holder provided with a connecting rod on its back, and a shoe block held at its base portion to the shoe holder. The braking face of the shoe block is formed with a projection serving as a gauge for positioning the braking face at an appropriate angle with the rim surface of the wheel. When the brake shoe is to be attached to a brake arm, the brake shoe is so positioned that two points of the shoe block, i.e., one point of the braking face and the projection, are in contact with the rim surface, and the brake shoe in this state is fixed to the brake arm. The brake shoe thus positioned is operable optimally as contemplated by the designer. When the brake is actuated, the projection is readily collapsed without producing any adverse effect on the braking function and removed early by friction.

Abstract: A fluid operated coupling which includes an inflatable annular tube element of an elastomeric material moves a plurality of aligned friction shoes in a radial direction to effect a torque sustaining clutching or braking engagement. A thermal barrier is provided to retard the transfer of heat from the friction shoes to the annular tube element. The thermal barrier protects the tube element and adds mechanical strength thereto to prevent excessive elongation and extrusion of the tube element between the plurality of friction shoes when the tube element is expanded. The thermal barrier is at least partially imbedded in the exterior surface of the tube element.

Abstract: A brake mechanism including a brake block, a positioning member, a bolt and a semi-circular portion. The positioning member is mounted to the brake block and the bolt is disposed between them. Then a rod of the bolt passes through a bore which is formed on the positioning member. The semi-circular portion has a radial serration formed on one side thereon to increase the friction force between the serrated side and a brake arm which the assembly device is fastened thereon. By means of those spherical surfaces in the same curvature between the means, the brake block is always in the desired condition to achieve the purpose of stopping the rolling wheel efficiently.

Abstract: A bicycle brake shoe for making press contact with a bicycle wheel rim to apply a braking force thereto. The brake shoe includes a shoe body which is elongated in the rotation direction of the wheel rim and which has a braking surface opposite to the braked surface of the rim. The shoe body also includes at least one slit extending in a direction transverse to the longitudinal dimension of the braking surface and extending inwardly into the shoe body to a predetermined depth.

Abstract: A brake shoe for a drum brake assembly such as those used in bus and truck applications comprising a brake pad assembly having at least one pad element having a continuous external surface, a mechanism for positioning the pad element relative to the brake drum of the drum brake assembly, and a mechanism for securing the brake pad assembly to the positioning mechanism, the securing mechanism including an alignment mechanism to align the brake pad assembly and thereby the brake pad to the positioning assembly. An alternate embodiment of the securing mechanism includes a failure element that enables the forces utilized for securing the brake pad assembly to the positioning assembly to be automatically controlled and prohibits tampering with the resulting assembly.

Abstract: A brake pad retention spring for spot-type disc brakes for automotive vehicles is disclosed including a fastening section for securing the spring to a brake pad backing plate and spring arms for engagement into a brake member, wherein two of the spring arms extend substantially in the circumferential direction in relation to the brake disc and a third spring arm extends substantially in the radial direction. The spring arms extending in the circumferential direction include U-shaped or V-shaped bent sections.

Abstract: A disc brake pad and shim assembly consists of a disc brake pad having a back plate with spigot holes which are incompletely filled and a shim with protrusions extending into the unfilled regions of the spigot holes, to stop slippage of the shim across the back plate in service.

Abstract: A heat puck has a trapezoidal shape with a steel base plate and a thick layer of a high heat capacity material such as copper. The heat puck is attached to either or both the pressure plate and flywheel of an otherwise conventional automotive clutch assembly. Preferably a circular array of heat pucks are mounted on a respective plate or flywheel. The puck is mounted with a large diameter shoulder member that extends through an aperture in the puck and is received in an aligned receptacle in the surface of the plate or flywheel. A screw or rivet fastener extends through the shoulder member, puck and plate or flywheel to retain the assembly. The shoulder member provides the necessary torque resistance to the assembly, protection the fastener from stress failure.

Abstract: A riveted brake assembly comprising a friction pad attached to a metal support plate with rivets. Each rivet comprises a rivet head disposed in a counter bored friction pad hole, a shoulder portion disposed in and filling a small diameter portion of the friction pad hole, a shank portion of lesser diameter than the shoulder portion disposed in the support plate hole, and a tubular tip portion extending beyond said support plate and adapted to be rolled over to secure the friction pad to the support plate. In its preferred form, the rivet is an eyelet of substantially uniform wall thickness, wherein the length and diameter of the rivet shoulder are substantially the same as the length and diameter of the small diameter portion of the friction pad hole.

Abstract: A disc brake assembly with a pivotable caliper is disclosed. The disc brake is a dual pin type, floating caliper disc brake wherein the caliper can be pivoted about one of the pins to facilitate servicing thereof while the caliper remains supported by that pin. Also disclosed is a novel outboard brake shoe assembly including spring clips having a retaining surface for engaging a stop provided on the outboard caliper leg to restrict radial movement of the caliper. The outboard brake shoe assembly can further comprise at least one projection for engaging the outboard caliper leg to restrain undesired circumferential movement of the caliper. The spring clips may further be configured to bias the brake shoe assembly against the caliper to prevent rattle of the brake shoe assembly.

Abstract: A clutch and brake friction assembly for a heavy duty vehicle is provided which includes a metal shoe having an exterior backing surface. The surface is provided with a multitude of burr-like protuberances arranged in a predetermined pattern throughout the surface. Molded to the backing surface and mechanically interlocking with the burr-like protuberances thereof is a lamina of friction material.

Abstract: A coupling assembly which includes an inflatable annular tube, a plurality of friction shoes removably attached to the tube so that the shoes move radially as the tube is inflated and deflated. The shoes include a friction pad bonded to one side of a backing plate and a driving bar also made of friction material bonded to the other side of the backing plate and joined together in a unitary structure. The driving bars fit into grooves formed in the tube to improve torque transfer between the shoes and the tube.

Abstract: At least one brake shoe (14) comprising a lining support member (16) and two lining sections (20) fastened one behind the other in circumferential direction to the support member (16) is arranged in a brake drum (10) which has a circular cylindrical internal braking surface (12). Each lining section (20) has an at least approximately circular cylindrical friction surface (22) the radius of curvature (R22) of which is smaller than the radius of curvature (R12) of the braking surface (12) and the center of curvature (M22) of which is located such that only a center portion of the friction surface (22) engages the braking surface (12) upon actuation of the brake.

Abstract: A cantilever brake is provided at the upper portion of each brake shoe with a swollen portion swollen slantwise or obliquely upwardly and away from the upper edge of the braking surface of the break shoe toward a shoe holder holding the brake shoe, to thereby prevent reduction in the braking surface caused by wearing of the brake shoe.

Abstract: A drum brake assembly with the brake shoe lining friction surface subtending over a total effective friction surface arc length between the shoe heel and toe ends of about 49.degree. on the first or primary shoe, symmetrical about the shoe horizontal center line, and about 57.degree. on the second or secondary shoe, similarly symmetrical. The first or primary shoe may have about the same friction surface arc length as the second or secondary shoe in some instances, each then preferably being about 50% of the friction surface arc length of the prior art typical secondary shoe lining of about 117.degree.. Different methods of reducing the effective friction surface arc lengths are disclosed, as well as the effect on brake effectiveness variations the invention has on brake assemblies, both with the same lining material composition and different lining material compositions.

Abstract: A disc brake is provided which comprises a self-contained wheel bearing including a casing with an axle structure extending into the casing and a bearing structure within the casing rotatably supporting the casing on the axle structure. The casing is connected to a wheel and forms the wheel hub. The axle structure is connected to a steering knuckle which has brake cylinder structure thereon. A brake plate having brake piston structure operatively engages the brake cylinder structure. Brake pads are provided in operative relationship to a brake disc which is slidably mounted on the bearing casing.

Abstract: A brakepad assembly for a disc brake comprises a holder having a recess surrounded by end and side wall portions. A brakepad comprises a block of friction material having a metal strip bonded into its rear face, the strip having T-shaped end portions which can be bent into engagement with the wall portions releasably to hold the pad in position. The pad assemblies are pivoted to the ends of caliper arms and have the disc-engaging surfaces of the pads held parallel to the disc surfaces by resilient links which form with the arms a parallelogram linkage.

Abstract: A friction element with a riveted friction lining, especially for highly stressed drum brakes, in which the mating surface (5) of the friction lining (2) to the lining carrier (1) and/or the opposing surface (6) of the lining carrier (1) to the friction layer (2) is provided with a multiplicity of particles (7) which are harder than the material of the opposing surface (6) of the lining carrier (1).

Abstract: A railway brake shoe adapted to be mounted on a standard brake head and having a wheel engaging surface with portions having a plurality of radii for matching rail wheels of different diameters. The portion having the smallest radius extends along the entire wheel engaging surface such that during braking the relationship between the brake head and shoe is such that the shoe will not vibrate.

Abstract: A mechanically operated sliding saddle disc brake has a fixedly positioned brake carrier 1, a brake saddle 2 mounted in the brake carrier and slidably displaceable parallel to the rotational axis of the wheel to be braked, with two shanks 2', 2" which straddle a brake disc which is rotationally fast with the wheel, a piston 14 mounted in the first brake saddle shank 2' slidably displaceable parallel to the rotational axis of the wheel and connected to a pressure plate 12, a first brake lining carrier 4 positioned on pressure plate 12 which carries a brake lining 4' which can be brought into engagement on one side of the brake disc, a mechanically operated expansion mechanism supported on piston 14 and on the first brake saddle shank 2', a second brake lining carrier 3 positioned on second brake saddle shank 2" which carries brake lining 3' which can be brought into engagement with the other side of the brake disc, and guides 11, 11' positioned on brake carrier 1 for guiding and supporting the two brake lining

Abstract: An improved disc brake system of the general type including a brake frame having a pair of spaced apart rails, a pair of brake linings slidably carried on the brake frame rails, a circular rotor rotatably carried on the wheel assembly of a vehicle and having smooth planar inboard and outboard contact faces, a caliper assembly slidably mounted on the rails of the brake frame, and, a brake pedal operatively associated with the caliper assembly, the caliper assembly having a piston which when actuated by depressing the brake pedal first forces one brake lining against the inboard contact face of the rotor and then causes the caliper assembly to slide along the brake frame rails to force the other brake lining against the outboard contact face of the rotor. The improved disc brake system minimizes the amount of heat generated when the brake linings frictionally contact the rotor and markedly increases the operational life of the rotor and brake linings.

Abstract: Brake block fastening device for bicycle, made up of a body and a resilient element, which combined together form a cavity capable of receiving and retaining the brake block, the resilient element being kept close to the body by a shifting cam device, capable of selectively locking or unlocking the block.

Abstract: A planar body spring attaches the inboard shoe and lining assembly to the piston of a disc brake caliper. The spring also serves as a shield for the piston boot seal.

Abstract: Disclosed is a brake shoe assembly (40) for frictionally braking a moveable member such as a wheel of a motor vehicle. Assembly (40) includes a frictional liner (8) that is removeably secured to a support member (2) that is adapted to move liner (8) towards and away from the member to be braked. Liner (8) is removeably secured to member (2) by means of at least one retainer (34) having a base portion (10) in embedded securement in liner (8) from which at least one pair of spaced-apart legs (12) extend towards support member (2) and through corresponding openings (4) therethrough to respective ends (14) thereof that are adapted to facilitate removal of liner (8) for replacement or repair.

Abstract: A friction clutch disc comprises an annular support plate and annular friction facings on the respective sides of the support plate. Bores in the friction facings are generally in axial alignment with openings in said support plate, and rivets secure the respective friction facings to the support plate through pairs of aligned bores and openings. Each rivet comprises a shank, a first head at one end of the shank bearing against a transverse, and preferably flared, shoulder adjacent the axially inner end of the associated bore and a second head at the other end of the shank bearing against the support plate around the margin defining the associated opening therein. An annular protrusion coaxial with each of the bores in at least one of the friction facings is axially in alignment with and inwardly of the associated shoulder and is at least partly received in the associated opening in the support plate.

Abstract: An improved brake shoe assembly is provided wherein friction material is cast directly onto a brake liner plate. The brake liner includes a plurality of perforations which form protruding tabs. Interengagement between the cast friction material and the perforated areas and tabs provides excellent interlocking strength between these components. The number, size, orientation and configuration of these tabs may be selected with regard to the specific operating characteristics to which the brake shoe assembly is to be employed.

Abstract: A hand-operated bicycle brake assembly includes a pair of complementary, similar, preferably identical, caliper arms having a pre-formed configuration, central supporting structure including a central aperture through the elongated caliper arm and a complementary central aperture through an offset planar portion extending from the central area of the arm, one end of the arm provided with a concave recess and threaded aperture for a locking bolt therein, a brake shoe, a support hub integral therewith and provided with spherical projections at each end for mating with a recess in the caliper arm and a bushing and secured to the caliper arm by a through bolt, the caliper arm being forked and provided with a cable clamp nut and bolt. The cable clamp nut and bolt is in two parts for engaging a cable as passed through a slot in the bolt.

Abstract: A brake lining carrier has a base plate one side of which can be detachably mounted on a brake lining support member and on the other side thereof is a layer of resilient material upon which are positioned a plurality of brake lining elements disposed to define a friction braking surface. A frame is provided on the edge portion of the base plate to enclose the brake lining elements. Each brake lining element is mounted upon a carrier plate which has projecting flange portions on two longitudinal sides of the brake lining element. The flange portions on the outer longitudinal sides are received within a groove formed in the frame and the flange portions on the inner longitudinal side extend into an open central portion of the friction lining block in which there is a clamp exerting a force against the inner flange portions in a direction perpendicular to the friction surface.

Abstract: An improved radial braking system uses the power of the cyclist's back pedaling to bring the braking member into contact with the rim of the wheel. The system allows for the direct contact of the braking member with the middle portion of the outer surface of the rim rather than to the side of the rim, as is common with the caliper type brakes. A rim having a laterally disposed lip for mounting of the spoke allows for an unobstructed middle portion for contact with the braking member.

Abstract: A disc brake pad comprises a plurality of sintered metallic friction elements, each having a braking surface area of less than 2 in.sup.2 (12.6 cm.sup.2) which are individually mounted on a steel plate or on a flexible carrier plate which is riveted at spaced points about its periphery to the back plate.

Abstract: A rivet- or bolt-type fastening member for fastening an asbestos base friction material for use in vehicles to a supporting member, wherein the fastening member is provided with a mass of sintered metal friction material fixed to the top surface of the head of fastening member and thereby adapted to have a frictional effect.

Abstract: A brake pad comprises a layer of friction material the working face of which engages a braking surface, and an electrical lead terminating in a contact positioned to engage the braking surface when the friction material is wearing thin, the electrical lead being composed of a flexible strip of insulating material carrying a flexible strip of conductive material, e.g. flexible printed circuit material.

Abstract: A coupling assembly which includes an inflatable annular tube, a plurality of friction shoes removably attached to the tube so that the shoes move radially as the tube is inflated and deflated. The shoes include a friction pad bonded to one side of a backing plate and a driving bar also made of friction material bonded to the other side of the backing plate and joined together in a unitary structure. The driving bars fit into grooves formed in the tube to improve torque transfer between the shoes and the tube.