Abstract: A disc rotor for a disc brake which is designed to make it difficult to cause brake squeal includes inner and outer discs, and first and second radially extending long holes formed in the outer and inner discs. The angular intervals between the long holes are made to differ between the outer disc and the inner disc, and two vibration modes are produced to interfere with each other during braking operation by which the occurrence of a steady-state vibration mode is restrained. In addition fins are provided between the two discs, with the fins including several fins arranged to reinforce both the inner and outer discs.

Abstract: An intermediate layer (4) of a relatively low thermal conductivity, high resistance to thermal degradation elastomeric material is interposed between a friction lining (3) and a relatively soft elastomeric layer (5), the latter being bonded to a backing plate (2).

Abstract: A shock absorber (13) is provided between the anchor (9) and the ends (2b, 3b) of the brake shoes (2, 3) facing the anchor (9) to reduce the impact noise between the brake shoe and the anchor.

Abstract: A brake pad includes a friction material with a braking surface to contact a rotor disc. The braking surface has a leading edge relative to rotation of the rotor disc, an opposed trailing edge, and inner and outer circumferentially extending edges joining the leading and trailing edges. A plurality of grooves are formed in the friction material and open onto the braking surface. The grooves are angled from a leading end of the grooves rearwardly relative to a radial line and are curved from their leading end to their trailing end, and form substantially the arc of a circle when viewed in a direction perpendicular to the braking surface.

Abstract: A disk brake having elements which enable the friction pads to retract together with the pistons when the braking fluid pressure is released, and which can also suppress brake squeaks. In order to retract the friction pads together with the pistons, first and second shims are disposed between the pad and the pistons on each side of the disk. The first shim, provided near the pad, has first claws gripping the back plate of the pad. The second shim, provided near the pistons, has third claws resiliently engaging the pistons. The first or second shims have second claws resiliently gripping the other shims so that the first and second shims can slide relative to each other in the radial direction of the disk.

Abstract: The invention is a brake shoe for application to the rim of a brake disc for retarding a rotary motion of the brake disc. The brake shoe has one or more brakepads having a pair of pad friction surfaces for contact with friction surfaces on the brake disc. The pair of pad friction surfaces are sloped in opposition to each other, and have an open space located between the pad friction surfaces. The brake shoe has a pad support structure to which the brakepad or brakepads are attached, the pad support structure serving to press the brake pad or brakepads against the friction surfaces on the brake disc. The pad support structure has a portion thereof for mounting on a device for positioning the brake shoe and for moving the brakepad or brakepads into engagement with the disc.

Abstract: A disc brake arrangement for motor vehicles is disclosed which comprises at least two brake pads (4,5) supported by a brake yoke (1), one side of said pads exhibiting a friction surface (11), which is arranged to face towards a rotatable brake disc (3). In a vehicle braking position, each brake unit is brought to an active position by means of two actuators (8,9) which act against the second side (10) of said brake unit. Thereby, each actuator exhibits an end portion (21) which is intended to transfer movement of the actuators from each respective second side of the brake pad to each respective brake pad. On the second side, each brake pad exhibits a first coupling member (27,28), arranged for each actuator. The end portions of the actuators exhibit second coupling members (37,38) for positioning of the brake pads.

Abstract: In a brake jaw consisting of a lining support member (2) and a friction lining (4), an intermediate layer (6, 8) arranged between the friction lining (4) and the lining support member (2) and acting as a damping layer to avoid squealing caused by friction, it is provided that the intermediate layer (6, 8) consists of a material mixture that is adapted to damp friction squealing during braking and to generate an acoustic alarm signal when reaching the wear limit.

Abstract: In a brake jaw (5) for disc brakes with partial linings having a brake disc (1), in particular for trucks, comprising a lining support plate (2) and a brake lining (4) fastened to the lining support plate (2), it is provided that for compensation of the radially different heat distribution in the brake disc (1), a radial profiling of the frictional power induced via the brake lining (4) is performed, the profiling being opposite to the heat distribution.

Abstract: Two shim plates provided for a friction pad are arranged to be slidable relative to each other in the circumferential direction of a disk, thereby suppressing the transmission of rotational force from the disk to a caliper through the friction pad and so forth during a braking operation. A friction pad including a lining and a backing plate is disposed between the disk and an outer leg portion of the caliper. An inner shim plate is integrally mounted on the back of the backing plate. An outer shim plate is disposed between the inner shim plate and the outer leg portion of the caliper in such a manner as to be slidable relative to the inner shim plate in the circumferential direction of the disk. During a braking operation, when the friction pad pressed by the caliper is circumferentially displaced by being dragged by the disk, the inner shim plate, together with the friction pad, slides relative to the outer shim plate, thereby reducing rotational force transmitted from the disk to the caliper.

Abstract: In a drum brake for a vehicle in which a pair of brake shoes 4 and 5 having an identical size are pressed against an inner face of a brake drum 1 so as to effect braking, a natural frequency of one (4) of said pair of brake shoes 4 and 5 is made different from a natural frequency of the other (5). Due to the difference in the respective natural frequencies of the right and left brake shoes 4 and 5, coupled vibrations between the brake drum 1 and the two brake shoes 4 and 5 are hard to cause, whereby it is effective in drastically reducing opportunities of generating "judder.

Abstract: In order to effectively damp the vibration of the drum of a drum brake, which is a main cause of brake squeals, a vibration detector and a vibrator are provided and operated separately from each other. The vibration damping control is carried out directly mechanically, or in a non-contact manner to improve durability of the device. A piezoelectric element, magnetic sensor or acceleration sensor is used to detect the vibration of the drum. The detected vibration is converted to an electric signal. After adjusting its phase and amplitude, the electric signal is converted to vibration force and outputted through a piezoelectric element or magnetic actuator as the vibrator to suppress brake squeals.

Abstract: A brake lining for partial-lining disk brakes, particularly of rail vehicles, wherein several friction or lining elements are provided which can be fastened to a support plate individually or in groups, in which case several support plates are arranged either directly on the lining holder of the disk brake arrangement or on a lining support which can be fastened to the lining holder. For rendering the surface pressure generated during the braking uniform, the support plates are swivellably linked to the lining support or lining holder, in the case of a group-like assignment, several (at least two) lining elements being swivellably arranged on the support plate.

Abstract: A device for suppressing brake noise wherein a rod is provided upright on the inside of the rim to which the brake lining is fitted, and a weight is fitted to this rod by way of an elastic body. By fitting a weight to the brake shoe by way of an intermediary elastic body, the weight will vibrate when it is subject to the vibration of the brake shoe. At low frequencies the vibration of the weight will be in phase with the vibration of the brake shoe, but as the vibration frequency of the brake shoe increases, the vibration of the weight will shift out of phase with the vibration of the brake shoe. In the vicinity of and above a certain frequency, this phase difference will become nearly 180 degrees. By matching this frequency to the brake noise frequency, the vibration of the brake shoe can be suppressed by the vibration of the weight.

Abstract: A brake rotor includes a radially inner hub or hat section having a central mounting face for mounting the rotor on an associated drive member, with an outer friction portion extending from the cylindrical hat wall. The outer friction portion includes a pair of opposite, flat annular friction rings adapted to interface with associated friction members. The outer friction portion of the rotor further includes a core extending radially outwardly from the cylindrical hat wall of the hat section. A layer of a sound dampening material is secured between the pair of outer friction ring sections and the core. The rotor of the invention transmits less noise than conventional rotors.

Abstract: A floating caliper-type disk brake for automotive vehicles, for supporting the circumferential forces and for guiding the brake pads including a brake carrier integrated into the steering knuckle of the vehicle. To insure a simple final assembly on the vehicle and to facilitate an automatic assembly, the floating caliper with brake pads attached thereto is supplied as a pre-assembled unit. The brake pads by means of leaf springs secured to their back plates are detachably fixed to the floating caliper. In the practice of the invention, the leaf spring of the outer brake pad, additionally serves to radially prestress the floating caliper vis-a-vis the carrier arms of the brake carrier, thereby eliminating another spring provided for this purpose. The assembly of the floating caliper on the vehicle is simplified because there is no need to assemble the said additional spring.

Abstract: A brake pad assembly is provided having a split backplate design comprising a damping layer disposed between two metal plates which are mechanically fastened together such that the plates are slightly slidable relative to each other to allow independent vibration of the two plates. The two metal plates are provided with a ratio of the thickness of the plate farther from the friction material to the plate closer to the friction material of at least 1.50. The damping layer is formed of a non-compressible, non-metal, heat-resistant material such as glass fiber cloth, mineral fiber cloth, ceramic fiber cloth, aramid fiber cloth, or graphite fiber cloth, and preferably has a low coefficient of friction. The plates are mechanically fastened together by rivets, pins or the like.

Abstract: In order to provide a shim for preventing brake squeal in a disk brake, which can decrease high frequency noise (squealing phenomena) produced at braking, a rubber coated metal, in which a rubber layer is disposed on one surface of a metal plate is used and a pressure sensitive adhesive layer is disposed directly on the other surface of the metal plate, the pressure sensitive adhesive layer may include a primer layer on the other surface of the metal plate. The pressure sensitive adhesive layer of this shim structure serves as an adhesive portion to be stuck to a backplate of a disk brake pad. Since the pressure sensitive adhesive layer is disposed on the metal plate, the pressure sensitive adhesive layer is never peeled off from the rubber coated metal and its damping action (brake squeal preventing action) is maintained.

Abstract: Brake noise (the unpleasant "squeal" noise) emitted when a motor vehicle brakes is effectively reduced. In a disk brake which applies a braking force by gripping a disk rotor from both sides by means of two brake pads, a weight is fitted by way of an elastic body to an oscillating member of the disk brake (e.g., brake pad, piston or caliper).By fitting a weight to an oscillating member by way of an intermediary elastic body, the weight is subject to the vibration of the brake pad and will vibrate. At low frequencies the vibration of the weight is in same phase with the vibration of the brake pad, but as the vibration frequency of the brake pad increases, the vibration of the weight shifts out of phase with the vibration of the brake pad. In the vicinity of a certain frequency and at frequencies above this, this phase difference becomes nearly 180 degrees. By matching this frequency to the brake noise frequency, the vibration of the brake pad can be suppressed by the vibration of the weight.

Abstract: A disc brake rotor has a plurality of radial groves on its opposite sides that are equiangularly spaced. The angular interval of the grooves on one side is different from the angular interval of the grooves on the other side, so that the vibrations of two different modes caused by the grooves on the opposite sides interfere with each other during braking operation. By thus suppressing stationary wave mode vibrations, the disc brake rotor prevents production of brake squeals.

Abstract: A brake pad (10) having a mechanical joint formed between a friction member (22) and a metal backing plate (12) by a plurality of rivets (30,30' . . . 30.sup.n). Each rivet (30) has a head (36) and an end (37) with the head (36) engaging the friction member (22) and the end (37) engaging the backing plate (12). During assembly of each rivet (30) with the backing plate (22), a force is applied to the head (36) causing the end (37) to flow in a groove (38) in a die (16) and form a flattened surface. The amount of the force applied to head (36) is limited to create a clamping force between the head and backing plate which holds the friction member (22) against the backing plate (12) and yet noise developed through vibration during a brake application is attenuated as the friction member (22) and metal backing plate (12) vibrate at different frequencies.

Abstract: An open-top disc brake can prevent brake pads from being dragged by a piston while the brake is not applied by causing the pads to follow the piston, and permits easy replacement of the pads. Shims are provided between the pads and the pistons. The shims have first claws engaged with grooves formed in the pistons, and second claws engaged with the front face of a backing plate of each pad. The second claws comprise claws that engage both ends of the pad with respect to the tangential direction of the disc, and claws that engage the edge of the pad on the radially inner side of the disc. The piston retracting force imparted to each piston by its piston seal is transmitted to the pad through the shim, so that the pad is separated substantially entirely from the disc.

Abstract: An improved brake shoe table includes the edges of the brake shoe table being bent radially inwardly relative to the remainder of the table by between 45 and 90 degrees. The bent edges increase the rigidity of the brake shoe and also reduce localized lining wear by bringing the lining into contact with a brake drum in a more uniform fashion. Moreover, the improved brake shoe design has unexpectedly decreased the operation noise associated with the use of a cam brake system.

Abstract: The present invention relates to a brake assembly and a pad configuration for use therein which is capable of use in corrosive environments without significant damage occurring to the assembly from such usage. The assembly comprises a single disc, a housing surrounding the disc which together with rotary seals provides a substantially sealed zone within which an annular braking surface of the disc rotates, and at least one friction pad having a friction surface adapted to be moved against the braking surface to provide a braking effect. The friction surface has a leading edge which is swept or angled rearwardly from a radial line passing through an inner leading edge corner of the friction surface and one or more grooves which are open at both ends and which are also angled rearwardly from a radial line passing through an inner forward end of each groove.

Abstract: It is proposed to mount single, cylindrical or polyhedron sintered friction elements (1) at the cantilevered ends of resilient metal plates (2); the metal plates are attached to a base platen (3) in such a way that each end of the plates acts as an independently movable bracket adapted to absorb any deformation induced by thermal forces, thereby enabling a uniform contact pressure to be exerted between the single friction elements and the brake disc.

Abstract: A brake pad assembly comprises a backplate, a friction lining secured to one side of the backplate and a planar dampening sheet secured to the other side of the backplate. The dampening sheet has at least one embossed projection extending from the one side thereof and the backplate has at least one recess in the side thereof secured to the dampening sheet and which is of generally the same configuration as the projection in the dampening sheet to receive the projection. The projection is partially outlined by at least one cut in the dampening sheet forming a cut edge on the projection which extends outside the plane of the dampening sheet to abut against the wall of the recess and compensate for excessive shearing forces caused between the dampening sheet and the backplate during a braking operation utilizing the brake pad assembly.

Abstract: A shim structure for sound dampening brake squeal noise in a disc brake apparatus, when installed on the piston and/or caliper engaging surface of a steel backing plate of the friction pad structure, is composed of a sheet of aluminum and a continuous membrane of a high temperature acrylic adhesive on one surface only of the sheet of aluminum. The sheet of aluminum has a thickness large enough to provide, in combination with the membrane of high temperature adhesive, effective sound dampening of the brake squeal noise. In a specific embodiment of the invention, the silhouette periphery of the shim structure is shaped to closely match the silhouettes of a number of related but differently configured friction pad structures.

Abstract: An improved disc brake friction pad assembly is provided with a metallic backing plate element, a friction pad element, and a noise-dampening shim subassembly positioned intermediate the backing plate element and the friction pad element.

Abstract: A brake shoe (14) for an internal drum brake assembly (10) having a mass damper (60) is disclosed for attenuating objectionable noise. The mass damper (60) is attached to an arcuate table (40) of a brake shoe (14) at a predetermined location adjacent to an anti-node corresponding to a flutter mode of vibration. The mass damper (60) is disposed adjacent to an arcuate edge 56 of the arcuate table (40).

Abstract: A brake friction pad assembly is provided with a metallic backing plate element, a friction pad element having a mating surface, an air-dried and thermally cured elastomeric adhesive material film joined in cure-bonded relation to the mating surface of the friction pad element, and mechanical fasteners joining the friction pad element and adhered elastomeric adhesive material film to the backing plate element with the elastomeric adhesive material film in an intermediate position.

Abstract: A method of attenuating audible sounds generated during a brake application through the engagement of a friction member with a rotating member. The brake is evaluated by modal and frequency response analysis to determine the natural frequencies generated during a brake application and identify the natural frequencies that create audible sounds. The locations on the friction member are identified which are most sensitive to generate audible sounds. Thereafter, portions of the friction material at the most sensitive locations are removed to change the natural frequency and attenuate the development of audible sounds.

Abstract: A brake shoe assembly is provided in which the brake shoe table has at least one longitudinal channel running along the upper surface thereof. A generally smooth arcuate brake shoe lining is fastened to the table, so that a longitudinal chamber is formed comprising the channel and the portion of the bottom surface of the lining which covers the channel. The chamber is constructed so as to affect the natural excitation frequency of the brake shoe to be outside the range of the excitation frequency of the brake drum, to thereby reduce or eliminate resonance of the two frequencies upon actuation of the brake.

Abstract: A disc brake shoe in which a relatively thin gage, low-cost metal backing plate has bonded to one face a friction brake lining and is formed on the opposite face with a plurality of straps that are adapted to engage corresponding recesses formed in a complementary thick gage metal backing plate to interlock the respective backing plates into a unitary brake shoe assembly which can be easily disassembled to permit change-out of a worn brake shoe by simply substituting a newly lined, low cost backing plate for the existing backing plate having worn lining without the need to re-claim the backing plate for re-use.

Abstract: A brake pad for disc brakes is provided in which the brake pad comprises a damping plate attached to the reverse face of a lining carrier plate. The damping plate is attached to the lining carrier plate by way of projections which are molded on the lining carrier plate and extend into corresponding apertures of the damping plate. The external ends of the projections are widened so that the damping plate is pressed against the reverse face of the lining carrier plate.

Abstract: A noise abating brake shoe assembly having a metal brake shoe and a friction material brake block with an elastomeric sound damping material added as a constituent to the brake block or interposed between the brake block and the brake shoe.

Abstract: A disc brake assembly includes a disc rotor, a pair of brake pads, a mounting member supporting at least one of the brake pads so as to be able to slide in the parallel direction with respect to a rotational shaft of the disc rotor, a caliper member slidably supported on the mounting member so as to be movable in an axial direction of the disc rotor and pressing each of the brake pads against faces of the disc rotor, respectively and at least one first pad clip interposed between the mounting member which is positioned at the entry side in the rotational direction of the disc rotor in the forward movement of the vehicle and the brake pad which is slidably supported on the mounting.

Abstract: To prevent local abrasion of a lining of a brake pad when one of a plurality of pistons for pressing the lining against a disk plate is rendered operative, a lining 16b mounted on a back plate 16a of a brake pad 16 is separated into two, and a recessed portion 26 or a gap is formed between the two linings 16b in a corresponding relationship to the position of a central one 21 of three pistons 20, 21 and 22. When the central piston 21 is rendered operative, the operating force of the piston 21 is dispersed to the left and right by the recessed portion 26 or the gap to act upon a disk plate 18, and consequently, local abrasion of the lining 16b is prevented.

Abstract: Various forms of a disc brake hold down spring are disclosed, the spring having two legs disposed in a V-shape and being elastically swingable in respect of each other. In a first form, the legs extend axially and are each formed with a wing loop with one side of the wing being lockable in an undercut opening in the housing while the opposite wing side engages the backplate of at least one brake show. In a second form, the legs extend circumferentially have ends engaging the brake shoes, with a central section received in a brake housing guide opening.

Abstract: A friction pad includes a flat back plate, a friction member fixed to one surface of the back plate, a shim in the form of a thin plate attached to the other surface of the back plate, and a viscous fluid applied between the back plate and the shim. The shim is formed with semi-circular notches in the outer edge and inner edge thereof with respect to the radial direction of the disc, and the notch in the outer edge and the notch in the inner edge have the same curvature.

Abstract: A disc brake is provided with a modified outer brake pad to brake flange contact area. The modified contact area leaves a substantial portion of the outer brake pad unsupported leading to reduced outer diameter/inner diameter radial taper wear of the brake pad.

Abstract: A disc brake is provided with a modified outer brake pad to brake flange contact area. The modified contact area leaves a substantial portion of the outer brake pad unsupported leading to reduced outer diameter/inner diameter radial taper wear of the brake pad.

Abstract: Leaf spring (18) for holding down the brake-lining carrier (25, 26), of a disc brake wherein the brake-lining carrier (25, 26) has a friction-lining free section (39) onto which is fixed a central holding section (27) of the leaf spring. The leaf spring has two uneven shanks (32, 33) which are each transversely angled from the central neck section (27) towards the brake-lining carrier. The shank (33) faces in a preferred direction of travel (D) towards the entrance side of the brake disc (2) and is bent away (35, 36, 37) from the brake-lining carrier radially outward (37) and abuts with its end (38) against the edge (22, 24) of an opening (17) of the caliper unit, which opening (17) accommodates friction-lining-free-section (39) of the brake-lining carrier (25, 26).

Abstract: A cushioned brake assembly for dampening the reaction forces between rotating and non-rotating components of the brake assembly during a breaking action, includes a plurality of alternating rotatable and non-rotatable discs, a fluid actuated piston, a spring element, and a cushion disc positioned between the piston and the discs. The cushion disc includes a resilient portion which is compressed during a braking action to dampen the reaction forces. Prior art clutch and brake assemblies utilize various types of spring elements to dampen reaction forces between rotating and non-rotating components during clutching and braking. These prior art dampening elements do not provide optimum damping functions. The subject cushioned brake assembly provides optimum spring rate characteristics during cushioned braking function.

Abstract: A spacer (10) is used to prevent a vibratory noise created by two inelastic parts of a drum brake assembly (12) from contacting each other; the two inelastic parts being the backing plate (18) and the brake shoe (28). The spacer (10) is fabricated from an organic polymeric material based on acetal. The spacer (10) comprises a head (30) and an anchor (34). The head (30) is cylindrical in shape with a rounded distal end (32). The rounded distal end (32) is the end that contacts the backing plate (18) and absorbs any vibratory energy which may produce a noise if the vibratory energy contacted an inelastic object, i.e., the brake shoe (28). The anchor (34) is extended through a hole in the tab (26) and is secured thereto because the fluted edges (36) of the anchor (34) are forced through the hole (not shown) in the tab (26).

Abstract: The brake pad (10) comprises a lining (8), a lining support (11) and a spring (15) fastened at (17) to the support (11) near one edge of the support. The two free ends of this spring are shaped so that each forms a mechanism for attachment (23, 24, 25; 23', 24', 25') of the pads. These two free ends grip two adjacent bearing surfaces formed on the caliper of the disc brake equipped with this pad. The invention is used for the preassembly of pads in a disc brake incorporated in the stub axle of the vehicle wheel.

Abstract: A drum brake shoe is provided with a plurality of reinforcements which are arranged at irregular intervals on the inner periphery of a rim.

Abstract: An anti-squeal shim interposed between a brake pad with a backing plate attached thereto, and a piston of circular transverse cross sectional shape, in a disc brake wherein the piston is slidably received in a cylinder portion of a caliper such that the centerline of the piston is parallel to an axis of rotation of a disc rotor, the piston being moved with a brake fluid pressure applied to the cylinder portion, and urging the brake pad against a friction surface of the disc rotor to thereby restrain a rotary movement of the disc rotor. The anti-squeal shim is gripped, upon application of the brake fluid pressure to the cylinder portion, only by radially-outer portions of opposite abutting surfaces of the piston and the backing plate which are spaced from the centerline of the piston in a radially outward direction of the disc rotor.

Abstract: A pad is engaged by a rotor by hydraulic pressure whereas another pad is engaged by the rotor on the other side thereof by a pair of pawls of the caliper under reaction. The reaction of the caliper is imparted to the other pad in a plane where a pair of the pawls of the caliper are opposed to the other pad and in a position at the marginal edges of the other pad, thereby minimizing squeal when the brake is applied.

Abstract: A backing plate (10, 10a) for supporting a friction lining in a disc brake assembly. The backing plate (10, 10a) is made of a thin sheet of corrosion resistant metal that has a recessed portion extending from a substantially rectangular base. The base has fixing brackets located on the top thereof with tabs which engage pins on the disc brake assembly. The recessed portion which is offset from the center of the rectangular base has a substantially circular shape that corresponds to an actuation piston of the disc brake assembly. The friction lining which engages the rectangular base has an additional thermal barrier located in the recessed portion. When the friction lining engages a rotor in the disc brake assembly, thermal energy is created. The thermal energy is carried through the friction lining to the backing plate; however, the thermal barrier substantially eliminates the direct flow of thermal energy to the actuation piston.

Abstract: A disc brake shoe in which a relatively thin gage, low-cost metal backing plate has bonded to one face a friction brake lining and is formed on the opposite face with a plurality of straps that are adapted to engage corresponding recesses formed in a complementary thick gage metal backing plate to interlock the respective backing plates into a unitary brake shoe assembly which can be easily disassembled to permit change-out of a worn brake shoe by simply substituting a newly lined, low cost backing plate for the existing backing plate having worn lining without the need to re-claim the backing plate for re-use.