Abstract: A friction material and carrier assembly (which is to be used in the construction of a driven plate of a dry friction clutch) comprises a circular carrier plate having at its periphery radially extending spokes or paddles which are elastically pliable axially of the carrier plate. Two annular friction facings which are resilient and capable of flexing are bonded by respective layers of silicone rubber to opposite sides of the paddles. Each rubber layer can be formed by a plurality of strips or beads of rubber. The paddles arrangement is capable of sinuous flexing circumferentially of the assembly, and when the assembly is in a driven plate in a clutch applying the clamp load specified for the clutch, the overall axial thickness of the combination formed by the paddles and rubber layers and the friction facings is reduced by between 0.05 mm and 2.00 mm.

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 torsional vibration damper for the driven plate of a friction clutch comprises a hub, a flange extending radially out from the hub and an outer member comprising an annular side plate arranged to one side of the flange and having a central aperture such that the side plate surrounds the hub with a clearance. The side plate is capable of limited angular movement relative to the flange with circumferentially directed resilient means acting between the flange and the side plate to control the angular movement. A friction damper is provided between the hub and the side plate and comprises a resilient friction element supported in the central aperture of the side plate and bearing against the outer surface of the hub.

Abstract: A cap clip for a slot in a brake disc wherein a pair of circumferentially spaced cap clips are mounted on the peripheral edges of each circumferential slot. Each cap clip has an arcuate extension that seats into an arcuate recess in the bottom corner of each slot. Each cap clip also has side portions that functionally engage the annular sides of the brake disc and also may have a top portion and a front portion that seat on the periphery of the brake disc and the side wall of the slot respectively. The pair of cap clips in each slot are not interconnected but are separately retained in their positions in the slots. Such brake disc also may have one retainer located on the periphery of the brake disc between adjacent slots and retained therein by connection to the clips to reduce oxidation of the brake disc.

Abstract: A clutch brake having a brake assembly interconnected to a rotatable shaft through means of driving function and a cover assembly provided with an external friction surface and carried rotatably in relation to said brake assembly; characterized by that a coned disc spring is interposed in said cover assembly, and a friction plate composing said cover assembly is pressed on a friction member composing said brake assembly by means of said coned disc spring.

Abstract: A rotational control apparatus is shown in its most preferred form as a clutch-brake including an improved housing having a cylindrical body portion and first and second housing ends removably secured thereto. The body portion includes an axially extending annular member intersecting with a radially extending annular member. The radially extending annular member forms an interface surface and a surface for reciprocal receipt of a piston inside the axially extending annular member and forms a mounting flange outside the axially extending annular member for securing axially extending bolts threadably received in the second housing end. The first housing end includes an axially extending projection having surfaces for receipt in the axially extending annular member and for reciprocal receipt of the piston.

Abstract: A stainless steel rotor for aviation applications has a preferred Rockwell Hardness of about 30 to about 35 to provide a suitable braking action. The adverse effects of galling are minimized through the provision of depressions on the braking surfaces of the rotor. Metal that is deformed on the braking surfaces or is separated therefrom as a result of frictional contact between the braking surfaces and the brake pads is moved into the depressions under the influence of the pads to keep the surfaces substantially free of deformations and accumulations of loose metal due to galling.

Abstract: A brake or clutch mechanism that has one of its stators or rotors composed of a plurality of circumferential spaced arcuate segments wherein each side portion of a segment has an off-set portion abuttingly engaging an adjacent off-set side portion such as to reinforce the off-set torque lugs which interconnect adjacent peripheral off-set lugs of the brake segments to provide axial reinforcement of the individual annular brake discs.

Abstract: A method of manufacturing clutch driven plates wherein a castellated core plate is sandwiched between two clutch facing annuli in which the thermosetting binder is substantially uncured. The assembly is clamped together and heated to cure the binder and bond the annuli to the core plate.The friction material of the facing annuli is pushed under the clamping pressure into the spaces between the castellations of the core plate and in the preferred clutch driven plates made by this method the inner surfaces of the facing annuli come into contact but do not bond together substantially.

Abstract: An asbestos-free clutch plate assembly has a reduced break-in phase and a facing which is substantially uniformly supported by the clutch plate. The assembly comprises a clutch plate defining a first surface and having a plurality of cambered portions. A substantially rigid, wear resistant, asbestos-free facing is attached to the first surface. The clutch facing has a plurality of grooves formed therein with each groove located substantially along the peak of one of the cambered portions thereby reducing the amount of material to be worn away during the break-in phase. The grooves further enable the clutch facing to conform to the contour of the surface so as to be substantially uniformly supported thereby.

Abstract: An electromagnetic clutch is disclosed comprising a rotor and an armature plate with improved frictional surfaces. The armature plate is disposed to face the rotor with a predetermined axial gap. The rotor or the armature plate is provided with a contact surface which contains spiral concaves and projections with a predetermined pitch. This surface has a layer of metal plating with a hardness lower than that of the magnetic materials which make up the rotor and armature plate.

Abstract: A moulded annular clutch facing has a plurality of surface grooves moulded into the facing. Each groove extends not substantially more than half way across the annulus, is not greater than 40% of the thickness of the facing in depth and extends either from the bore or the outer perimeter of the annulus.

Abstract: The friction face of the rotor of an electromagnetic clutch is formed by a ring of molded friction material and by magnetic insets molded within the friction material and defining the magnetic pole pieces of the rotor. The inserts are formed with multiple shoulders which face in various directions and which interlock intimately with the friction material to prevent the inserts from shifting in any direction relative to the friction material. In addition, the inserts themselves are anchored directly to the rotor by screws in order to prevent the inserts from pulling away from the rotor and to promote uniform wearing of the inserts and the friction material.

Abstract: A slot machine having multiple spinning reels coaxially mounted in a frame for relative rotation. All machine movements are electrically activated by pulling a starting handle. The handle operates an electric switch which, in turn, initiates sequencing of the machine by a processor.The reel and sprocket are mounted so that relative rotational movements between them in a first rotational direction are prevented when the two are in a predetermined angular orientation. However, relative rotational movement between the reel and sprocket is permitted over a limited arc in the opposite rotational direction. A spring interposed between them permits a slight overtravel of the reel beyond the arrest position of the sprocket, and thereafter returns it to its normal position relative to the sprocket. To prevent undesirable oscillations, a friction clutch is interposed between the reel and the sprocket.

Abstract: A friction clutch driven plate has an internally splined hub, and externally a circular radial flange to rotate with the hub about the hub axis. The flange has teeth in its outer periphery which are in driving meshed engagement with teeth in the inner periphery of an annulus of friction material. That annulus is formed by separate successive arcuate sections or sectors of friction material. The sections of friction material can, axially of the hub, each move relatively to one another by a limited amount to improve the axial compliance of the friction annulus when in a clutch and clamped between a drive plate and a pressure plate. A holding strap extends around the outer periphery of the annulus to hold the sections thereof on the flange against centrifugal force.

Abstract: A friction clutch driven plate comprises first and second disk-like carrier plates rivetted together and having first and second flat spokes respectively on their peripheries. A single integral annulus of friction material is held in place by the first spokes in a first recess in a first face of the annulus and by the second spokes in second recesses in an opposite second face of the annulus. The carrier plates are also connected together by stop rivets passing through arcute slots in a third disc between the carrier plates. In known fashion torsional vibration damping springs are disposed in windows in the carrier plates and the third disc. The third disc has a central hole lined by splines to engage similar splines on a shaft. First and second bearing bushes are disposed in the central openings of the carrier plates.

Abstract: A friction disc for use in multiplate friction wet clutch packs in automatic transmissions for vehicles or other friction clutch applications wherein an annular core plate is segmented with interlocking end portions to form a ring, and the friction facings are also segmented and are bonded to the core plate with the facing segments overlapping the interlocking ends of the core plate segments. Also, the ends of the friction facing segments may be interlocked or slightly spaced apart to form oil channels therebetween, and openings may be formed in the core pieces to intersect circumferentially offset radial channels opening into opposite edges of the friction segment to form oil passages into the disc.

Abstract: A limited slip differential gear mechanism includes a pinion shaft rotating integrally with a differential gear casing, pinion gears attached rotatably to the pinion shaft, side gears engaged with the pinion gears and splined to axles, and a plurality of first and second clutch plates alternately disposed between the side gears and the differential gear casing. A lug portion provided on the inner surface of each first clutch plate engages with the outer surface of the side gear, while a lug portion provided on the outer surface of each second clutch plate engages with the inner surface of the differential gear casing. Concave portions or projections are formed between the first and second plates in contact with each other to define gaps for retaining lubricating oil.

Abstract: A rotor for a disc brake assembly is provided with a first portion (52) adapted for attachment to a wheel assembly (28), a second portion (54) engageable with at least a pair of friction elements and a connecting portion (56) extending between the first and second portions. The second portion (54) defines an inboard surface (60) and an outboard surface (64) facing the first portion (52). The connecting portion (56) cooperates with the second portion (54) to define a heat sink (78) at the radially inner edge of the inboard surface (60) to substantially offset tilting of the second portion toward the first portion in response to temperature expansion of the rotor second portion (54).

Abstract: A friction material and carrier plate assembly which may be used in the construction of a driven plate of a friction clutch has a flat, metal, disc-shaped, carrier plate integral with spokes co-planar with the carrier plate and radiating from the outer periphery of the plate. The spokes are adhesively bonded and/or riveted to the bases of recesses in one of the radial friction faces of a one-piece annulus of friction material, that face being proud of the spokes. The assembly is centered on an axis relative to which the annulus and spokes can flex axially.

Abstract: A brake disc comprises an inner mounting member and outer annular braking member and a driving connection between the two members. The braking member has the usual flat annular braking surfaces. The driving connection comprises a square shaped drive dog which engages in corresponding notches in the outer periphery of the mounting member and the inner periphery of the braking member. The notches have flat driving faces in engagement with corresponding flat faces on the drive dog. Axial location is by stop flanges secured together through an aperture in the drive dog. The axial length of the dog is greater than the thickness of the disc members so the flanges, in engagement with the axial end faces, allow some axial movement. A crinkle washer controls the relative axial positions. There are a plurality of drive dogs spaced equally around the disc.

Abstract: A disc brake assembly for the front or rear wheel of a motorcycle including a brake disc having pairs of projections located on its periphery at 120.degree. intervals. The pairs of projections may be placed on either the outer periphery or the inner periphery of the brake disc. The projections define open ended recesses receiving bosses formed integrally with the wheel hub, and partially surrounded by hardened retainers and structural members. A bolt threaded into each boss prevents disassembly of the bosses and recesses but is not subjected to forces caused by thermal expansion of the brake disc during braking. One or more hydraulically activated stationary calipers clamp non-rotary brake pads frictionally against opposite faces of each brake disc. Provisions are made for cooling the brake disc by atmospheric air.

Abstract: A device to be connected between the engine and power train of a construction vehicle or the like for damping the fluctuations of the engine output torque. The damper comprises a drive plate and a retaining plate coaxially connected to each other for simultaneous rotation, and a driven plate coaxially mounted between the drive and retaining plates for angular displacement within limits. Mounted between the retaining plate and the driven plate are a friction plate and a disc spring, with the friction plate being biased by the disc spring into frictional contact with the driven plate. The friction plate has a conical contact surface which, under the bias of the disc spring, makes frictional contact with the driven plate under even pressure. Two other friction plates lie between the drive and driven plates and make frictional contact with the driven plate and with an intermediate plate in positive engagement with the driven plate.

Abstract: A clutch disk having a plate and a spline hub and a organic and ceramic-metallic facing fixed to the opposite faces of the plate in back-to-back positions on the opposite faces and fixed to the plate with rivets passing through the plate and facings, the opposite ends of the rivets being recessed in the facings, the organic facing having a plurality of equally spaced notches extending radially inwardly from and circumferentially along the periphery of the disk, the peripheral edge of the notches being open for the circumferential length of the notches, the ceramic-metallic friction facing filling the notches.

Abstract: The disc consists of a core (1), being a hub (3) surrounded by spokes (2), and friction pads in the form of annular sectors (8) having recesses (15, 16) in their inside backs (10) to cooperate with the spokes (2) in providing radial guidance and angular locking. Elastic means are provided for removably axially mounting the sectors on the core (1), which elastic means (19, 6) also serve to removably radially mount the sectors on the core.

Abstract: A clutch disc assembly with a balancing device includes a disc adapted to be connected to an output shaft; a supporting plate device provided at the outer peripheral portion of the disc; a pair of friction facings fixed to both surfaces of the plate device; and a rivet for correcting an unbalance of an inertial mass of the disc assembly around the output shaft and fixed to the plate device. The facing may be provided with a port in which the rivet for correcting the unbalance is disposed, and a friction facing piece is disposed in the port to form a part of a friction surface.

Abstract: A clutch disc positional between a driving flywheel and a pressure plate characterized in that the clutch disc is composed of a central disc-shaped disc section perpendicular to the driving axis of the flywheel and an outer peripheral cone-shaped disc section. Power transmission is commenced at the disc-shaped disc section when the clutch is engaged.

Abstract: A clutch friction disk comprises two friction facings attached by fixing members in the form of rivets to respective sides of a support. Balancing means are associated with the rivets, which to this end comprise an axial bore adapted to accommodate a balancing weight.

Abstract: A disc assembly comprises a plurality of substantially radially spaced spokes joined together by intermediate walls of flexible material. The disc assembly can be used to transmit forces in a force transmission system such as a multiple disc clutch. Such a system comprises a member for applying an input force, a member for receiving an output force, and the inventive annular disc assembly, the disc assembly having force transmission and force application regions at its inner and outer edges and at an intermediate region, the noted members being in engagement with at least some of the force transmission and force application regions.

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: A friction clutch element is disposed for mounting to a rotatable clutch disc. The element is designed to improve the uniformity in coefficient of friction values over a friction surface area thereof during clutch operation, particularly when such surface is formed of ceramic material. The element includes friction facings having symmetrically disposed radially inner and outer subportions integrally joined by a center subportion of a circumferentially shorter dimension. The facings contain radially disposed, continuously arcuate leading and trailing edges, and in a preferred embodiment, the leading and trailing edge portions of the outer and inner subportions are convex, while those of the center subportion are concave.

Abstract: A movable disc for a friction type electromagnetic clutch/brake is designed for preventing the production of grating sounds from the movable disc. The movable disc includes a rotary armature being movable in a predetermined direction by the application of electromagnetic force, a friction material stuck onto one side surface of the rotary armature, an elastic member supported on one side surface of the rotary armature to the side opposite to the friction material, a face plate fitted to the rotary armature so as to urge the elastic member to the rotary armature. Perforations are formed in the face plate to reduce its mass and the surface area contacting to the elastic member thereby attaining a rapid start up and good periodic damping characteristic.

Abstract: A friction brake disk is formed having a plurality of T-shaped slots extending through a peripheral edge thereof from one braking face surface to the other and each slot carries a keyslot reinforcement comprised of a metallic insert member having the same T-shaped configuration such as to be easily inserted in the slot in the axial direction of the disk but restrained from being removed in the radial direction. Each insert member is locked within the slot in the axial direction by at least one retaining clip that is fastened to the insert member and extends beyond the slot into the face surface of the disk.

Abstract: The present invention discloses a facing assembly of a friction clutch disc comprising facing fixing plate having plural apertures and arranged at radially outer portion of the clutch disc; and a pair of facings disposed on both faces of the fixing plate, said facings having connecting portions entered into the apertures and integrally connecting both facings together so that the facings may be fixed to the plate. A total sectional area of the connecting portions in radially outer portions of the facings is preferably larger than a total sectional area of the connecting portions in radially inner portions of the facings.

Abstract: A friction energizing drive such as a clutch disc in a friction clutch for automotive clutches, starting clutches for continuously variable transmissions and heavy-duty clutches for heavy equipment or off-the-road vehicles, wherein a ceramic material in the form of discs or buttons comprise the friction material. To smooth the generally abrupt torque curve and reduce the harsh feel of a ceramic material clutch, the ceramic material in the form of circular members, alone or secured to disc backings, are rotatably mounted on an annular clutch disc or plate located between a flywheel and pressure plate in a clutch assembly.

Abstract: A starting device for gasoline engines which may be started by spinning the crankshafts thereof, and comprising a torque transmission device consisting of a male friction cone adapted to be fixed in and turned axially by an ordinary electric drill device, and a matching conical female cup adapted to be affixed concentrically to an engine crankshaft and to receive the male cone therein so that rotation of the latter rotates the former to start the engine. A novel connection of the cone to the electric drill permits misalignment of the drill axis with the crankshaft, and damps the application of rotary force to the cup to avoid shocks to the system.

Abstract: A wearing dry friction material element is mounted on a support member by a cured rubber adhesive in a spaced pattern. The cured adhesive has a tensile strength adequate to retain the frictional element to the substrate, and also serves to cushion the shock at engagement between the frictional element and a contacting surface. The cured adhesive is generally of the room temperature vulcanizing (RTV) rubber type. Also described is a method for the production of a dry friction material assembly.

Abstract: A clutch brake arrangement for farm work machinery or other equipment comprises a rotary member rotatably attached to an output shaft extending through a cam plate mounted on an engine mounting. A pressure plate is mounted on the cam plate in such a manner that it is movable along said output shaft. A brake spring is provided to bias the pressure plate toward the rotary member. A lining plate is disposed between the rotary member and a clutch disc rotatable with the output shaft. A clutch spring is provided to bias the lining plate toward the clutch disc to engage it with the pressure plate. The pressure plate is moved toward the cam plate against the brake spring, so that the lining plate is engaged with the clutch disc and, thereafter, is spaced away from the pressure plate. A plurality of projections are discontinuously formed on the peripheral portion of the pressure plate which is outside of its braking plane.

Abstract: A clutch brake particularly adapted for use with heavy duty automotive vehicle clutches, the clutch brake including an annular base comprised of a pair of initially separate sections incorporating radial interlocking teeth which permit the clutch brake to be assembled and installed on the driven shaft of the clutch without requiring disassembly of such driven shaft.

Abstract: A friction brake disc that has a pair of spaced annular surfaces with an inner and outer periphery. Slots within the disc and located either along the outer or inner periphery receive an insert for transferring the loading forces to the walls of the slot to prevent fraying, cracking or crumbling thereof. The inserts are U-shaped in configuration with recesses along the respective side edges of the leg members. Clips secured to the discs adjacent to the slots have curved portions projecting into the recesses to reatin the inserts in their respective slots while allowing some play to maintain full contact between the leg sections of the inserts with the side walls of the slots to minimize the concentration of forces transferred from the inserts to the discs.

Abstract: A disc brake assembly has a plurality of pairs of cantilever arms that extend in opposite axial directions and support a brake ring on a hub. The arms expand and contract under thermal and inertial loads.

Abstract: A friction brake disc assembly having a plurality of axially aligned annular shaped rotor discs splined for axial movement interleaved with annular stator discs which are splined for axial movement along a mating key member or members that are fixedly secured to a torque tube. The discs have a plurality of circumferentially spaced slots along the periphery, with inserts therein to transfer the load to the discs. The inserts have structural portions thereof extending along the outer annular surface of the discs for engagement by clips to retain the inserts within the slots. The clips are secured to spaced locations along the periphery of the discs to minimize the concentrations of any load transferred from the inserts to the discs.

Abstract: A rotatable brake member comprises a plurality of substantially radial ventilation channels, each of which is divided longitudinally into at least two portions which are generally coaxial with a mean longitudinal line of the channel and which have substantially constant cross-sections, these portions having an abrupt discontinuity of cross-section relative to one another, the or each channel defining a single, empty radial passage, the side wall of the or each of these portions being smooth and continuous, and the abrupt discontinuity of cross-section between the portions being provided by a peripheral transverse annular step.

Abstract: A friction brake assembly for use with axially aligned rotor brake discs that are interleaved with stator brake discs. The rotor discs have a plurality of circumferentially spaced slots along their inner periphery. The slots opposite side walls are beveled and are complimentarily engaged by the beveled legs of a U-shaped insert. The inserts transfer the load and stresses to the full beveled faces of the slots while held in place by overlying clips which are fastened to the discs.

Abstract: There is disclosed a clutch/brake mechanism of the "disc" type wherein the coacting friction producing members are severally configured of frusto-conical and planar form whereby sealing contact is maintained at the peripheral surfaces thereof when in a brake-released condition to thereby prevent entrance of external contaminants into the brake-clutch mechanism.

Abstract: A combination friction ring and mount therefor for clutches, brakes and the like is shown according to the teachings of the present invention as including a circular friction disc member having a substantially flat face. The face has a shoulder thereon at the outer periphery thereof and a substantially flat ring friction lining secured upon the flat face of the circular member and the shoulder.

Abstract: A segmented annular clutch plate for use in any conventional clutch plate chanism. The segments are of equal arcuate dimension so that they are interchangeable. Each segment possesses the same annular uniformily serrated surface. Each segment may be provided with a key-slot mating connection to restrict the radial movement of the clutch plate while in operation. The clutch plates are designed and oriented so that in the clutch assembly the plates in one set of plates have different numbers of segments than the plates in the other set of plates, whereby adjoining plates can have only two segment joints in axial alignment at any one instant.

Abstract: A friction lining for a multiple disk clutch or a multiple disk brake, with grooves extending in a direction from a radially inner lining edge to a radially outer lining edge. Individual ones of these grooves exhibit pronounced rectangular or orthogonal transistion areas between the groove and a surface of the friction lining with the remaining grooves exhibiting non-rectangular transistion areas of the groove edges to the friction surface of the friction lining. A plurality of grooves provided non-rectangular transistional areas extend linearly and are not connected to the grooves having the rectangular transistional areas. At least one groove having a rectangular transistional area and being open at least toward the outer lining edge is disposed between two circumferentially adjacent or neighboring grooves having a non-rectangular transistional area.

Abstract: A clutch is disclosed having an input shaft and an output shaft and having alternate pairs of discs interfitting with each other. Half of the discs being attached to the input shaft and half to the output shaft. The discs are knurled on one side in a grooved pattern. The knurling is deeper at the inner radius than at the outer radius so that there is a major restriction to oil flow from the inner radius to the outer radius. The restriction of the grooves insures that the grooves are completely filled with oil during operation of the clutch.

Abstract: A friction pad configuration and a method and apparatus for fastening said pads to a disk core member wherein the base of the pad is formed with a plurality of extended tabs that are inserted in slots in the core and secured to the tabs of a pad on the opposite surface of the core by a clip that draws the base-to-base mounted pads together on the core. Alternatively, and for mounting on a single face surface of the core, U-clips are mounted on the tabs and inserted through the core to the opposite surface thereof and the ends of the U-clips are bent down into annular grooves in the face surface of the core to securely mount the pads to the core.