Showing papers on "Disc brake published in 1972"

Brake disk for disk brakes

Abstract: A brake disk for disk brakes, especially for high performance passenger motor vehicles, of the type having friction surfaces which are brought into friction contact with friction members of the disk brakes during braking operations. A plurality of recesses penetrating inwardly from the braking surfaces are provided for assisting in the cooling of the brake disk. The recesses are arranged in a uniform pattern over the braking surfaces along dividing lines interconnecting the centers of the recesses. In one preferred embodiment, the dividing lines are of zig-zag shape and are arranged symmetrically with respect to radii of the brake disk. Another preferred embodiment of the present invention arranges the dividing line as single or multiple spirals which extend spirally around the center of the brake disk. Another preferred embodiment arranges the dividing lines as curved vane-wheel blade shaped lines which are spaced from one another to exhibit a vane wheel configuration when viewed in a plane parallel to the braking surface. The preferred recess patterns may be arranged in either solid or ventilated brake disk. In the solid brake disk embodiments, the recesses may extend either partly or completely through the brake disk. In the ventilated brake disk embodiments, the recesses extend through the brake disk and communicate with the hollow ventilating spaces between the portions of the brake disk. The recesses preferably partially overlap connecting webs between the two sections of the brake disk.

Vehicle clutch and brake

Abstract: A vehicle brake having a stationary housing, an output hub rotatably mounted on the housing and a multiple plate disc brake operatively connected between the housing and the output. The brake plates are spaced such that alternate members are splined to the housing and the output hub. The brake plates are engaged to prevent rotation of the output hub by a pair of pistons one of which is spring applied and pressure released and the other of which is pressure applied. The pistons are actuated independently so that the unactuated piston provides an abutment for the brake plate. The spring applied piston functions as a parking brake so that whenever the vehicle engine is not in operation a plurality of springs urge the piston into engagement with the brake plates to effectively connect the output hub to the stationary housing thereby preventing rotation of the output hub. When the engine is operating, fluid pressure is supplied to the piston to compress the springs thereby disengaging the brake. The fluid pressure to operate the other piston is controlled by a valve to permit selective operation of the brake during vehicle driving to permit the operator to stop or retard the vehicle or in a track laying type vehicle to permit the operator to have steer control. An input shaft is also rotatably mounted in the housing and is selectively connectable with the output hub through a multiple disc clutch to provide a drive to the output hub.

Disc brake with adjustable cam operator and thrust distributer

Abstract: A disc brake having a friction lining pad for braking engagement with a rotatable disc. Moving of the friction lining pad is obtained by rotation of a cam engaging a force directing member fastened to the lining pad for transmitting an actuating force to the friction lining pad in a direction for bringing the lining pad into engagement with the disc. Adjustment for wear of the friction lining pad is obtained through the rotation of the cam in the other direction in an amount to maintain engagement with the force directing member in the disengaged condition of the brake to equalize the stroke required to actuate the brake.

Surface cleaning apparatus

Abstract: A cleaning machine that includes a drive unit and a trailer unit joined by an articulated joint, the drive unit including a pick up assembly having a reversible power driven paddle wheel mounted in a housing to extend closely adjacent the surface to be cleaned, the housing including leaf flap mechanism mounted for movement between a downwardly extending position and an elevated position, a duct mounted on the drive unit frame and having an inlet for receiving raised material from the housing, an airstream outlet, and at a lower elevation than the airstream outlet, a heavy debris outlet opening to a heavy trash receptacle on the frame, the heavy trash receptacle having doors for discharging the heavy trash, a suction blower having an inlet fluidly connected to the duct airstream outlet and a door for selectively blocking fluid communication between the duct and suction blower, a motor for driving the drive unit and having a directly driven shaft with a brake disc thereon, and mechanism to move the housing to an elevated transport position; and that the trailer unit includes a frame having a dump container thereon, a discharge door at the rear of the container, the container having a top filter portion, a standard on the tractor frame for stationarily mounting one end of a duct for placing the container in fluid communication with the suction blower outlet when the container is in a debris receiving position, and a deflector adjacent the container inlet for deflecting air and debris downwardly.

Disc brake device for bicycles

Abstract: This disc brake device for bicycles has steel balls inserted into cavities formed equidistant in one of two brake body portions held together by bolts to form a brake body and made in contact with one of two friction pads arranged at each side of a brake disc, and a rotatable cam made in contact with the steel balls and having projecting surfaces each formed between those surface portions of the cam which are normally in contact with the steel balls. An inner wire connected to a bicycle brake lever is connected at its free end to the cam for rotating the cam and urging the steel balls against one of the friction pads by the projecting surfaces of the cam when the brake lever is operated to pull the inner wire.

Impingement cooling means for friction clutch or disc brake

Abstract: Cooling means for a friction clutch or disc brake wherein superior cooling is achieved by impinging high velocity jets of relatively cool air against the frictionally engageable surfaces of the clutch or brake. Fluid passages are provided in one or more of the engagement members and these communicate with jet orifices which direct air introduced into the passages under pressure against the friction surfaces of the adjacent members. The orifices are arranged so that the air jets are substantially perpendicular to the adjacent friction surfaces and cool the latter far more effectively than can be accomplished by means of laminar flowing cooling air.

Disc brake and wheel assembly

Abstract: A disc brake and wheel assembly in which an annular brake disc has axially extending circumferentially spaced lands and grooves formed on its outer peripheral surface, and a brake disc support and drive member, provided as part of the wheel assembly, has a bell-like configuration, the generally radially extending portion of the member being mounted on the wheel assembly hub and the generally cylindrical portion of the member having circumferentially spaced projections received in the disc grooves and engaging the edges of the disc lands in rotary driving and axially relatively movable relation so that the disc is rotatably driven with the wheel assembly and is axially movable in relation thereto for brake adjustment. The brake caliper is of the fixed type, with one axially movable brake shoe and one fixed brake shoe arranged to frictionally engage opposite sides of the brake disc when actuated. A piston and cylinder arrangement in one side of the caliper housing is provided to move the movable brake shoe. It may also have a manually actuated mechanism so that the brake can also function as a parking brake, and may be provided with an automatic adjusting mechanism.

Vehicle final drive with planetary gearing and friction brake

Abstract: A planetary final drive and brake are incorporated within a wheel hub of a land vehicle with the ring gear structure nonrotatably connected to the end of a stationary hollow axle through which a drive shaft extends and carries a sun gear and brake disc. The ring gear structure carries friction pads and a hydraulic actuator for the friction brake and fluid is routed to the hydraulic actuator by way of passages in the stationary hollow axle and the ring gear structure.

Caliper and mounting means for a disc brake

Abstract: A disc brake comprising a sliding caliper straddling the disc and supported on two axially extending pins mounted in a fixed support, two pressure pads anchored on the fixed support so as to co-operate with the opposite sides of the disc, one pad being adjacent to an inside surface of one leg of the caliper, the other pad being operated by the piston of a brake cylinder mounted in the other leg of the caliper, the pins traversing mutually opposite bores axially provided in the support and in the caliper to guide the sliding movement of the caliper, wherein said bores are open along their length to have a substantially Cshaped cross-section, so that the pins can be introduced into the bores through the opening, locking means being also provided, so that the pins cannot thereafter freely escape from the bores by passing through the opening.

Disc brake with semi-metallic and organic friction pads

Abstract: A disc brake apparatus having a first friction pad of an organic lining and a second friction pad of a semi-metallic lining for opposing movement of a rotor upon a brake application to provide a uniform coefficient of friction when subjected to varying deceleration conditions.

Disc brake with identical removable friction pads

Abstract: The brake pads of a disc brake are retained in the housing by a pair of pins, each engaging its own pad. The pads are prevented from tilting about their pins by other means which can be further pins. If these further pins fit into slots in the ends of the pads, it is not necessary to remove them during pad removal. A detent can be provided to hold the brake pistons in their cylinders during pad removal.

Spreading disc brake with removable shoes

Abstract: A brake assembly comprising a brake housing adapted for attachment to a wheel of a wheel assembly for rotation with the wheel. The brake housing has oppositely disposed annular braking surfaces spaced apart to provide an annular gap therebetween. Brake shoes are located between the annular braking surfaces and are capable of movement towards or away from one another but held against circumferential movement by co-operating with a fixed support. Brake shoe operating members are disposed between the brake shoes and are movable by a brake actuator to move the brake shoes away from one another to cause each brake shoe to contact the adjacent annular braking surface of the brake housing to effect braking, the brake shoes being removable or replaceable from or into the annular gap in the radial direction thereof without dismantling the brake assembly.

Brake disc for rail vehicles

Abstract: In a brake disc for rail vehicles, e.g. as wheel brake disc, brake disc rings (7, 9) are arranged on both sides of a wheel disc or web element. Fit screws (19) and through-screws (21) penetrate bores of the brake disc rings (7, 9) and of the wheel disc element bearing them. In order to avoid fractures in the material of the brake disc rings, in particular in the region of the bores for the through-screws and fit screws, occurring in the event of high thermal stresses, stress relief grooves (29) are provided in the brake disc rings, which stress relief grooves (29) extend annularly and meet the bores preferably on the inside or outside of the diameter tangentially. These stress relief grooves can divide a central area of the frictional face with increased thermal stressing from edge areas of the brake disc rings which are located radially on the outside and inside and are stressed to a lesser degree or not at all, which division contributes to a reduction in the concentrations of stress at the junction with these areas. When used on a pure shaft brake disc, the stress relief grooves (29) extend in the area of the two brake disc halves which is free of bores and, as a result, reduce the concentrations of stress which are brought about by the geometry of the friction linings to be applied and have thermal causes.

Devices for inhibiting the jack-knifing of articulated vehicles

Abstract: An anti jack-knifing coupling is arranged between a vehicle and a trailer and comprises a turntable mounted on the vehicle for rotation about a vertical axis. A brake disc is secured to the turntable and brake calipers are used to prevent rotation of the turntable while the vehicle is being braked. The coupling between the vehicle and trailer is arranged so that relative articulation can only occur when the brake calipers are inoperative.

Bicycle disc brake

Abstract: A disc brake for bicycles having a rotor mounted externally on a bicycle wheel hub and a brake housing mounted in a bracket affixed to the wheel axle wherein the brake housing has limited slidable movement in the support bracket to permit alignment with the rotor but is restrained from rotating about its own axis by a complementary opening and housing shape. The brake includes a mechanically manipulated threaded actuator to apply brake motion with a high mechanical advantage.

Brake actuating and adjusting mechanism

Abstract: A brake mechanism having a pressure actuated piston moving disc brake pad assemblies into braking engagement with a disc for service brake operation, and a mechanically actuated mechanism which mechanically moves the piston to engage the brake pad assemblies with the disc for a parking brake operation. The piston has a screw and an adjuster nut threaded thereon, the nut being restrained from excess axial movement relative to a mechanically actuated shaft in one direction and a housing containing the piston and shaft in the other direction. The nut forms a part of a clutch arrangement which is actuated by the mechanically actuated shaft so that operative force transmitting engagement can occur between the shaft and the piston. The adjuster nut provides for clearance take-up and adjustment for lining wear during pressure brake actuation.

Multiple disc type friction brake for an automotive automatic power transmission

Abstract: A multiple disc type friction brake for use in an automotive automatic power transmission including an input shaft, an output shaft, a planetary gear set having first and second rotary members, and a casing construction formed with a spline on its inner wall. The friction brake consists of a retaining plate splined to the spline of the casing construction and held axially fast thereon. The friction brake also consists of first and second sets of rotatable plates located on both sides of the retaining plate, and first and second rotatably plates which cooperate with the first and second sets of rotatable plates, respectively. The rotatable plates are splined on splines formed on the first and second rotary members respectively and axially movable toward and away from the retaining plate. The rotatably plates are splined to the spline of the casing construction for axial movement. First and second fluid pressure operated servo pistons are provided for actuating first and second sets of brake disc assemblies.

Disc brake caliper assembly

Abstract: A disc brake caliper assembly having a hydraulic actuating cylinder incorporating two separate hydraulic chambers, a manually acutated parking brake mechanism, and a brake adjuster.

Disc brake with anti-vibration anchoring arrangement

Abstract: The invention relates to a disc brake and particularly to an anti-vibration anchoring arrangement for a brake pad in a disc brake. The brake pad is located in a U-shaped radial opening provided in the fixed support. The brake pad co-operates on one hand with two approximatively rectilinear abutments inside this opening and converging towards the outside of the latter, and on the other hand with a boss located at the bottom of said opening. When the brake is actuated, the brake pad is locked by three points by tilting in its plane around one of these points and the possibilities of vibrations are reduced.

Trailer anti-jackknife device

Abstract: An anti-jackknife device for a tractor semi-trailer combination is disclosed herein The tractor has a conventional fifth wheel mounted at the rearward end thereof and the trailer has a kingpin extending downwardly from the lower forward end thereof for detachable connection with the fifth wheel A plurality of disc brake assemblies are secured to the underside of the fifth wheel and rotatably support a brake disc therein A hub means is secured to the brake disc and has a pair of opposing locking arms pivotally secured thereto which are movable into locking engagement with recesses in the underside of the trailer A pneumatic cylinder means is connected to the locking arms for moving the arms between locked and unlocked positions with respect to the trailer The disc brake assemblies are operatively connected to the tractor brake system so that actuation of the tractor brakes causes the disc brake assemblies to frictionally engage the brake disc to prevent rotation of the same with respect to the fifth wheel which prevents further angular displacement of the trailer with respect to the tractor An airhydraulic booster system is operatively connected to the disc brake assemblies to provide the necessary pressure thereto

Brake disc structure

Abstract: An annular brake disc having an annular braking member on which at least one radially-extending face is furnished with a friction facing which is provided by a series of segmental-shaped friction pads that are secured to the braking member. Each friction pad is constructed of a soft or brittle material such as carbon and has at least one substantially straight edge. In order to transmit braking loads, this edge is chamfered so as to fit into a corresponding inclined undercut abutment face in the member, of which the following is a specification.

Brake actuator and adjuster mechanism

Abstract: A disc brake assembly has a caliper frame formed to provide a cylinder housing containing a hollow piston. A second piston is slidable in the hollow piston and mating clutch surfaces are formed on the two pistons so that they are normally engaged. An adjuster nut is splined in the second piston for relative axial movement and axially engages the second piston in force transmitting relation. The adjuster nut is threaded on a screw or shaft which is rotatably journaled in the housing so that rotation of the shaft imparts axial brake actuating movement to the rotationally stationary adjuster nut, the second piston, and the hollow piston. Conversely, axial force exerted on the adjuster nut in the brake actuating direction tends to cause the nut to move rotatably and axially relative to the shaft. A compression spring has one wavy section exerting a preload between the hollow piston and the second piston to axially load the clutch with a force which is less than that required to lock the hollow piston and the second piston together against relative rotation. The spring has another section acting between the hollow piston and the adjuster nut under a preload which urges the adjuster nut into axial force transmitting engagement with the second piston. A brake shoe assembly associated with the hollow piston locks the hollow piston against rotation in the housing, but may be removed so that both pistons and the adjuster nut can be rotated to reset the entire mechanism when new brake linings are installed. The brake may be pressure actuated, with pressure in the housing acting on both pistons. The brake may also be mechanically actuated by rotation of the shaft to move the adjuster nut and both pistons axially in the brake actuating direction. In either case, upon brake release, any slack which had to be taken up during actuation due to lining wear is taken up by rotary and axial movement of the adjuster nut when the brake actuating force transmitted through the clutch decreases until the second piston is permitted to rotate relative to the hollow piston by clutch slippage under influence of the adjuster nut.

Improvements relating to disc brakes

Abstract: 1277345 Disc brakes GIRLING Ltd 28 May 1971 [2 June 1970] 26497/70 Heading F2E In a disc brake in which rotatable friction discs are brought into engagement with opposed radial surfaces in a stationary housing by pressure plates located between the discs angularly moved apart by balls located in inclined recesses in the plates, the angular movement to initiate application of the brake is effected by an hydraulic actuator. In the embodiment shown hydraulic pressure is supplied to a space 10 surrounding a piston 8 located in a cylinder 5, the piston acting through a collar 13, nuts 15, 16 and rod 14 on a pair of toggle levers 18, 19, junctioned by a pin 17, the outer ends of which are pivotally connected to lugs 21, 22 on the pressure plates. Piston 8 is loaded by a spring 23 towards a stop formed by a lip 24 on the cylinder. Spring 23 surrounds a sleeve 25 and abuts a flange 26 thereon and a lip 27 on the piston inner end. The screw-threaded outer end of rod 14 is connected to a handbrake lever. In a further embodiment collar 13 is coupled via a trunnion coupling 31, Fig. 2 (not shown), to a lever (32) pivoted on a pin (33) on a lug (34) on the cylinder or brake housing.

Hold-down assembly for sliding caliper type disk brake

Abstract: Several embodiments of hold-down spring arrangements for sliding caliper type disk brake assemblies. In each embodiment, the holddown includes a plate that is adapted to be affixed to the torque taking member of the brake and a cooperating formed spring that is retained by the plate and which engages the sliding caliper. The spring permits sliding movement of the caliper but holds the caliper against vibration and rattling. In one embodiment the spring is of the leaf type and in the other embodiments the spring is constructed from a formed wire element and functions as a torsional type spring.

Multiple chamber disc brake caliper assembly

Abstract: The invention relates to a wheel brake for an automotive vehicle and, more particularly, to the caliper assembly provided as a part of a disc brake. The invention is further related to a brake wheel cylinder assembly for use in a disc brake assembly or other types of brakes requiring multiple chamber wheel cylinder actuation.

Winch and control means therefor

Abstract: A winch for use on a mobile crane to hoist or lower a load comprises a hydraulic winch motor, a shaft driven thereby, a winch drum, and planetary gearing through which the shaft drives the drum. A three-position hydraulic control valve controls motor speed and direction of rotation. The winch further comprises a brake disc connected by a uni-directional clutch to the shaft and spring-applied, hydraulic brake cylinder-released brake pads for frictional engagement with the brake disc. A two-position hydraulic brake valve controls operation of the brake cylinder. Both the control valve and brake valve are part of a control means which further includes a control lever and linkage. The control lever acts through the linkage and is movable from a neutral position (wherein both valves are closed) toward a winchlower position (wherein the brake valve opens before the control valve) and toward a winch hoist position (wherein the brake valve remains closed but the control valve opens). During lowering, the winch drum starts rotating smoothly as the brake is released and the load begins to descend under the force of gravity before lowering power is applied to the winch motor. During a winchhoist operation, the uni-directional clutch allows winch drum rotation even though the brake is still applied.

Fluid and mechanically actuated disc brake system

Abstract: The invention concerns improvements in a disc brake assembly that comprises: A. first means operable in response to controlled application of fluid pressure transmitted from a source to advance a brake part into braking engagement with a rotating disc, the brake part being subject to wear, and B. second means operable in response to predetermined decrease in source fluid pressure to effect displacement of said brake part into braking engagement with said disc and irrespective of the worn condition of said part.

Disc brake including vibration dampening means

Abstract: A disc brake of simple construction wherein an intermediate member such as a metal powder sintered product retaining lubricating material such as oils and fats is provided between the pad and the piston, and a protecting cover is fitted over said intermediate member to prevent the leakage of said lubricating material and to retain the lubricating material for a long time. The protecting cover slides with the pad, or piston, relative to the porous intermediate member during braking, while the intermediate member reduces the frictional force between opposed surfaces of the pad and the piston thus preventing brake squeal.

Self-adjusting device for disc brakes

Abstract: There is disclosed a self-adjusting device for the brake lining clearance of a hydraulically actuated spot-type disc brake having a cup-shaped actuating piston. The piston is contained in the hydraulically actuated brake cylinder. A spring housing is inserted into the piston and is resiliently clamped in position therein by the interior surface of the piston. A threaded adjusting spindle and an adjusting nut threaded onto the spindle in a self-locking manner are disposed coaxially within the housing. An engaging element having an inclined ramp is disposed coaxially about the nut and which upon adjustment is in a torsionally locked connection with the nut. A spring is disposed within the housing coaxial of the exterior surface of the nut and is in a cooperative relationship with the engaging element. A post is fixed to the inner surface of the housing and cooperates with the ramp to enable the desired adjustment. The desired clearance between the disc of the disc brake and the brake lining is provided by the cooperating threads of the spindle and the nut.