Abstract: In a wheel angular acceleration sensor for an anti-lock controller for sensing the locking tendency of a vehicle wheel being braked on the basis of overrunning and attendant axial displacement of a flywheel to produce a control signal for a braking force, the flywheel is connected through a clutch and a cam mechanism with an output shaft rotatable in accordance with rotation of the wheel, the cam mechanism being operable in response to overrunning of the flywheel to provide an axial displacement to the flywheel and comprising a drive cam plate supported on the output shaft through a bearing against axial movement and a follower cam plate connected to the flywheel and adapted to cooperate with the drive cam plate.

Abstract: In a vehicle anti-skid hydraulic braking system of the pump/re-apply type the pump plunger is of differential outline and works in a stepped bore. An annular chamber and a full pump chamber are defined in the bore on opposite sides of the head of the piston. The annular chamber is pressurized by fluid at a pressure dependent on the difference in pressure between the master cylinder and the brake, and the chamber is subjected to the pressure in the annular chamber in one direction and the pressure in the master cylinder in the opposite direction. The system is therefore provided with a pump which forces fluid back to the master cylinder but with torque levels similar to a pump which acts against brake pressure.

Abstract: A bicycle brake actuating device includes a brake lever (21) hinged in such a way to turn around an axis (X) substantially parallel to the supporting axis (Y) of a cyclist's hand. The brake lever can be supported by two tabs (17) placed on the hand's supporting handle (14). A holding cavity (40) is preferably utilized to receive the transmission of the brake lever and the mechanism (30, 32) that is part of the actuating device.

Abstract: A brake device provided with an antilock controller which includes a sensor for sensing by the overrunning of a flywheel an abrupt deceleration of a wheel of the vehicle resulting from the braking action of a brake device, a modulator for controlling a braking pressure fed to the brake device in accordance with a signal from the sensor and a hydraulic pump driven by the wheel. The sensor and a transmission device are adapted to operatively connect the flywheel of the sensor to the wheel are housed in a closed chamber defined between a pair of hub end walls which are supported on an axle through bearings, and the flywheel is supported on the axle. The hydraulic pump, the modulator and a transmission device operatively connecting the hydraulic pump to the wheel are arranged externally of the closed chamber.

Abstract: In a disc brake apparatus mounted to a vehicle wheel supported by a fork member, a caliper body is disposed within a space formed inwardly of the fork member and to one side of the vehicle wheel. The caliper member straddles the brake disc from the internal periphery of the brake disc. A bracket integrally formed with the caliper body extends inwardly therefrom in a radial direction to the axle of the wheel where it is pivotally supported. The caliper body is also coupled by a removable pin with the fork member to prevent rotation about the axle. The caliper body is formed with an opening for permitting removal and replacement of the friction pads through the bottom wall portion thereof and the bracket is also formed with an opening for permitting the pads to be fully removed from the vehicle.

Abstract: A wheel angular acceleration sensor for a vehicle anti-lock control device wherein the tendency of the wheel going toward a locked state resulting from an excessively great braking force of the brake applied thereto is detected by overrun rotation of the flywheel and the overrun rotation is converted into an axial displacement of the flywheel by the cam mechanism to output it as a signal for controlling the braking force, the sensor having an aligning mechanism interposed between an output shaft rotated in association with the wheel and the cam mechanism as well as a friction clutch plate for allowing the overrun rotation of the flywheel, whereby when a deflected load is exerted on the cam mechanism or the friction clutch plate due to an error in machining or the like at the time of occurrence of a thrust at the cam mechanism, the aligning mechanism works to overcome the deflected load, allowing the flywheel to displace smoothly and accurately in the axial direction.

Abstract: A motor cycle disc brake has a disc secured by an outer peripheral portion to the rim of a wheel which is rotatable about an axle held by a pair of fork legs. A brake caliper is secured to a fork leg and straddles the inner periphery of the disc. The disc is secured to the wheel rim by bolts which allow the disc some axial play relative to the rim to compensate for any run out of the rim. The caliper is fixed to the fork leg by a pair of securing members one of which engages in a recess in a lug on the fork leg so that the caliper can be released quickly from the fork leg.

Abstract: A disk brake system employing a caliper support bracket pivotally mounted about the axis of a first disk which is coupled with a hydraulic cylinder. The hydraulic cylinder in turn drives a second caliper assembly on a second disk. The hydraulic cylinder driven by the caliper support bracket is aligned with the plane of the disk. A bell crank may be employed in alignment with the disk to couple the caliper support bracket and the hydraulic cylinder together.

Abstract: An anti-lock brake system employing an anti-lock control unit between a brake master cylinder and a front wheel brake. The brake system is applied to a damped telescopic front fork and includes an anti-dive device which operates to increase damping force upon application of braking force to the front brake. In a first embodiment, the anti-dive device operates from hydraulic pressure upstream of the anti-lock brake unit. In a second embodiment, reaction force to braking of the wheel is sensed and employed to actuate the anti-dive device.

Abstract: A braking system employing an antilock device which has two brake actuating mechanisms responsive to input hydraulic pressure through the antilock device. Valves are provided in the control mechanism for a second brake actuating mechanism which provide hydraulic cylinders for controlling the brake mechanism. The hydraulic cylinder of such a valve is vented until the controlling hydraulic system reaches a minimum pressure level. This pressure level is determined to be above that of the residual pressure level of the antilock mechanism. In a first embodiment, direct hydraulic control is provided to the multiple brake actuating mechanisms. In the second preferred embodiment, the reaction force to braking of the first brake actuating mechanism controls the brake pressure through a second master cylinder to the second brake actuating mechanism.

Abstract: The invention provides a caliper body supporting structure for disk brakes in vehicles having two rear wheels, which is characterized by including a pipe member fixed to the rear end of a swing arm supported on a body frame for vertically pivotal movement; a holder member provided on said pipe member, having therethrough an eccentric bore; an axle for the rear wheels rotatably supported within said eccentric bore of said holder member, said axle being driven by way of a drive chain; a driven sprocket and a disk rotor both fitted over said axle; a caliper body of the disk brake attached to a caliper stay rotatably supported on said holder member; a longitudinally elongated hole formed in said caliper stay, and a pin extending from said swing arm and designed to be inserted into said elongated hole so as to support said caliper stay movably with respect to said pin.

Abstract: A brake actuating master cylinder unit for bicycles and the like comprising a unit mountable upon the handlebars of a bicycle, a master cylinder having a piston mounted therewithin, a bellofram secured to the inner surface of the master cylinder at one end thereof and at the piston engaging closed end thereof secured to the piston by means of a plurality of projecting tits extending through complementary apertures in the piston. A snap ring preferably is used to positively secure the tits with the piston. A two-part piston rod is employed between the piston and the brake actuating handle to allow same to return to the normal, non-actuated position freely and without withdrawing the piston therealong. This two-part slidable connection permits positive actuation of the piston during braking operation, but yet permits free separation and non-positive return upon completion of the brake actuation.

Abstract: An antilock brake device for vehicles having a sensor which senses a possibility of locking of a wheel, during braking of the wheel, by an overruning of a flywheel which generates a release signal. A hydraulic pump having a cam shaft rotated in association with the wheel generates hydraulic pressure for antilock control. A gear unit as a transmission for transmitting rotation of the wheel at an increased speed to the flywheel comprises an input member located within and connected to a hub of the wheel, a ring gear formed on the input member, a planetary gear meshed with the ring gear and a sun gear meshed with the planetary gear. The planetary gear is secured to a cam shaft supported on a stationary casing. The flywheel of the sensor disposed within the hub is connected to the gear unit through a drive shaft. The sensor is supported on an axle extending through the hub.

Abstract: A brake device for vehicles comprises a master cylinder, a wheel brake adapted to be operated by the output hydraulic pressure from the master cylinder to apply a braking force to a wheel, and an antilock control unit, having therein an inertia type wheel angular deceleration sensor driven by the wheel through a transmission device and adapted for controlling the output hydraulic pressure from the master cylinder in accordance with the output of the sensor, the antilock control unit being carried on the support system for the wheel. Defined on one side of the wheel is a recess which is concave toward the other side of the wheel from the central rotational plane of the rim of the wheel, and the antilock control unit and transmission device are disposed in the recess.

Abstract: This invention relates to hydraulic master cylinder assemblies having a hydraulic master cylinder and an actuating mechanism and in particular to a hydraulic master cylinder assembly in which it is possible to alter the travel ratio between a driver operable actuating lever and a piston of the hydraulic master cylinder. The actuating mechanism includes a lever mechanism interposed between the actuating lever and the piston the effective lever arm length of which can be altered by means of an adjustable member forming part of the lever mechanism.

Abstract: A braking device for bicycles and the like comprising a double pair of yoke elements stamped of sheet plate material having appropriate lightening holes and component element mounting holes provided therewith. A pair of suitably mounted brake pad structures are adjustably mounted from slots in the main body portion of the respective pairs of yoke plates. One of said brake pads can be mounted on a suitable hydraulically actuated slave unit and/or the other operator controlled brake actuation mechanism. The other brake pad is mounted on a slidable movable shaft which is spring biased in the released or non-actuated position. An off-center cam lever moves the parking brake pad into actuated position with a bicycle wheel, or disengages same therefrom.

Abstract: A control unit used for antilock brake systems, which comprises a support base having a hydraulic channel, an oil tank, and an electro-magnetic valve provided with openings communicating with the hydraulic channel and the oil tank, the valve being supported on the support base and in turn supporting the oil tank. The control unit is characterized in that a support hole and a connecting wall covering the support hole are formed in the bottom wall of the oil tank, the support hole is oil-tightly fitted around the upper end section of electro-magnetic valve and the connecting wall is connected by a screw to a shaft projected from the upper end face of the electro-magnetic valve, and that in the connecting wall is provided a through hole for communicating the inside of the oil tank to the electro-magnetic valve.

Abstract: A hand operated hydraulic bicycle brake includes a brake pad holding unit which is actuated by a rolling diaphragm. A flexible fluid line couples a master cylinder located on the handlebars of the bicycle to the rolling diaphragm which controls a slave cylinder located adjacent to the rim of the front wheel of the bicycle. Actuation of the slave cylinder forces the brake pad into contact with the rim, and further actuation of the master cylinder causes the unit to pivot to bring a second brake pad into contact with the wheel rim.

Abstract: A shielded disc brake system for motorcycles having structure for inducing radial air flow past the brake disc. The device includes an annular passageway between the hub and the shield which may include a centrifugal fan positioned therein. The fan may include passageways between vanes longitudinally aligned with radial passages in the brake disc. The disc itself is mounted about its periphery on bosses extending from the hub. The fan is then bolted to the ends of the bosses to retain the disc from axial movement away from the bosses. Screening members may also be positioned about the periphery of the disc and across inlet ports to provide additional effective closure of the disc brake cavity within the side panel or panels.

Abstract: The invention relates to a hydraulic rim brake for bicycles with a triggering mechanism which is attached to the handlebar of the bicycle and is actuated by a hand lever, with two brake cylinder housings which are attached to the frame of the bicycle in oppositely located relationship to each other and enclose between them a wheel rim, the brake cylinder housings being connected by pressure lines to the triggering mechanism, with pistons displaceable in the brake cylinder housings, and with brake shoe supports arranged on these pistons for supporting brake shoes engaging the rim. In order to protect the piston from the effect of harmful bending moments, provision is made for the brake shoe supports to be in the form of flanges which are connected to the piston and are each displaceable parallel to the motion of the brake piston in a slide guide provided on the brake cylinder housing, and for the slide guide to simultaneously constitute abutments for absorption of the braking forces.

Abstract: A floating disk brake of small weight and low manufacturing cost in which the caliper slides stably and the center of gravity of the caliper is set close to the front fork or the like where it is supported. Torque receiving surfaces formed on both sides of a caliper are arranged such that side surfaces of the backing plates of the pads are abutted thereagainst. A pin which supports the pads on both sides of the disk rotor is provided in the caliper, extending parallel to the rotary axis of the disk rotor and inserted into central portions of peripheries of the backing plates. Two slide bolts for slidably supporting the caliper have first end portions screwed into a member which is rigid with the body or frame of the vehicle and second end portions slidably inserted into respective sides of the caliper. At least one of the slide bolts is arranged so as to partially overlie the disk rotor with a slide center of that slide bolt being substantially coincident with the center of the thickness of the disk rotor.

Abstract: An operation device of a clutch master cylinder including a clutch master cylinder slidably incorporating therein a piston and a clutch lever pivotally supported by a pivot on a lever holder and having a piston operating arm. The clutch lever has a bearing hole formed substantially parallel to the pivot and a rotor is turnably fitted into the bearing hole. A push rod which comes into contact with the piston so as to be able to rock is interconnected to the rotor. To adjust the play stroke of the clutch lever, the length of the push rod is adjustable in one embodiment of the invention. In another embodiment, the pivot is fitted to a shaft hole of the clutch lever and the axis of the pivot is eccentrically disposed with respect to the center of the shaft hole.

Abstract: A disc brake system for a motorcycle having a wheel hub includes a brake disc fixed on one side of the hub to rotate with the hub. A caliper member is fixed to the motorcycle for braking engagement with the brake disc. A side panel of substantially the same diameter as the disc covers the brake disc and has a cooling air introduction port. A radial fan for inducing radial outward air flow from the brake disc is positioned adjacent the periphery of the brake disc and fixed to rotate with the hub. The hub includes a plurality of bosses extending towards the brake disc. The disc brake contains cutout portions for engagement with the bosses. The radial fan includes a ring attached to the ends of the bosses on the other side of the brake disc from the hub to retain the brake disc on the bosses. A radial flange extending from the hub covers the inner periphery of the radial flow fan.

Abstract: A rear axle supporting structure in a three-wheeled motor vehicle equipped with a chain drive mechanism. A holder member having an eccentric bore is fitted in a pipe member which is fixed to the rear end of a swing arm, and a rear axle is inserted in the eccentric bore of the holder member. A brake caliper for braking a brake disc is connected to the holder member through a caliper supporting member concentrically rotatably with respect to the eccentric bore of the holder member.Adjustment of the drive chain is effected by turning the holder member, without affecting the positional relation between the vehicle body frame and the swing arm, without any inclination of the rear axle occurring, and while maintaining a constant positional relation between the brake disc and the brake caliper.

Abstract: A hydraulic master cylinder for a motorcycle includes a body defining an oil reservoir therein which is mounted in an axially aligned relationship with the handlebar. The body may be formed separately from, or integrally with, the handlebar.

Abstract: An interlock braking system for motorcycles comprising a brake pedal, a single master cylinder which generates a braking pressure according to an external force applied to the brake pedal, first and second brake mechanisms connected to the master cylinder for applying first and second braking forces according to the braking pressure to the front and rear wheels, respectively, and an anti-lock mechanism for changing the braking pressure according to rotational speeds of the front and rear wheels to prevent the wheels from becoming locked. In this manner, the interlock braking system effectively avoids the occurrence of a wheel-lock condition when braking the front and rear wheels of a motorcycle.

Abstract: In a combined wheel-disc assembly, the wheel disc surface is used as a brake rotor. The need for a separate disc rotor is eliminated and the assembly provides a large area for brake contact and desirable air cooling of the braking surface. Braking forces are balanced in the disclosed assembly. Holes may be provided in the wheel disc to increase air circulation.

Abstract: A hydraulic pump with an unloading function which comprises a pump body, a spring chamber formed in the pump body and communicating with a fluid reservoir, a pump chamber formed in the pump body and communicating with the spring chamber and an accumulator through a suction valve and a delivery valve, respectively. An operation chamber is also formed in the pump body and accommodates a drive member such as a pump drive shaft. A plunger slidably extending through a first partition between the spring chamber and the pump chamber, and a tappet having a smaller diameter than that of the plunger and slidably extends through a second partition between the pump chamber and the operation chamber to abut against the plunger. A spring is accommodated in the spring chamber and is adapted to apply a predetermined resilient force to the plunger to bias it toward the tappet.

Abstract: A brake system for motor cycles is disclosed which includes a hydraulic master cylinder supplying a front brake and a rear brake and a pressure-regulating valve having a calibrating spring adapted to limit the maximum pressure on the rear brake to a predetermined value. The compression of the calibrating spring of the pressure-regulating valve is controlled by the relative motion of two distinct points on the rear shock spring.

Abstract: A hydraulic braking system for two-wheeled vehicles, with the system including a main brake cylinder associated with a rear axle braking circuit and a main brake cylinder associated with a front axle braking circuit, as well as with a braking force distribution device. The braking force distribution device is adapted to produce, in a specified ratio, a pressurization of both the rear axle braking circuit and front axle braking circuit when the main brake cylinder associated with the rear axle braking circuit is actuated. When the main brake cylinder associated with the front axle braking circuit is simultaneously manually actuated and the main brake cylinder of the rear braking circuit is actuated by a brake pedal, the force distribution device produces a reduction of the rear axle braking pressure.

Abstract: An improved anti-lock brake device of simple and compact construction adapted for use with a motorcycle having front and rear master cylinders for actuating front and rear wheel brakes, respectively. The front master cylinder has a first brake chamber for producing a brake torque for a front road wheel and a first control chamber for controlling the brake torque so as to prevent locking of the front wheel. The rear master cylinder has a second brake chamber for producing a brake torque for a rear road wheel and a second control chamber for controlling the brake torque so as to prevent locking of the rear wheel. The control chambers are each in communication with a single common source of oil pressure through a first control valve and with an oil tank through a second control valve.

Abstract: A load conscious control valve arrangement for modifying the pressure applied to the rear hydraulic brake of a motor cycle comprises a control valve rigidly mounted by a bracket on the frame of the motor cycle. The stem of the control valve is connected by a tension spring to an adjustable spring support of a combined spring/damper suspension strut. Deflection of the rear suspension as a result of increased loading causes an increased tension to be applied by the spring and thereby increases rear brake pressure. To compensate against the decrease in tension which would otherwise be applied to the valve stem when the adjustable stop is adjusted but there is no increase in the load on the motor cycle, an eccentric formed on the adjustable stop so that rotation of the stop may be provided to adjust the suspension strut causes a shift in the radial direction of the suspension strut of the point Z at which the spring is connected to the spring support.

Abstract: A hand operated hydraulic bicycle brake includes a brake pad holding unit located in back of the front fork of a bicycle. A flexible fluid line couples a master cylinder located on the handlebars of the bicycle to a slave cylinder located adjacent the rim of the front wheel of the bicycle. Actuation of the slave cylinder forces the brake pad into contact with the rim, and further actuation of the master cylinder causes the unit to pivot to bring a second brake pad into contact with the wheel rim.

Abstract: A disc brake including a caliper member slidably supported on a stationary member, at least one pin provided on either of the caliper member and a stationary member, and a guide member mounted on the other of the caliper member and the stationary member and slidably engaging with the pin. A guide portion provided on the other of the caliper member and the stationary member and detachably mounting the guide member. The guide member can be detached from the guide portion by displacing the guide member in a direction transverse to the axis of the pin.

Abstract: A brake disk is fixed to a wheel hub to rotate therewith, and axially spaced bearings support the wheel hub on an axle. A non-rotary caliper member extends through a central opening in the brake disk and carries pads which engage opposite surfaces of the brake disk when hydraulic pistons are energized. A portion of the caliper member encircles a portion of the wheel hub, and a wide supporting surface is provided to minimize tilt or cant of the caliper member. In a preferred embodiment a support rim encircles the portion of the wheel hub to provide wide spacing of supports for the caliper member. Another embodiment places the central plane of the brake disk in the center of one of the wheel hub bearings and in the central portion of the cylindrical rim. Limited axial movement of the caliper member after wear of the brake disk and friction pads is accommodated by resilient bushings at both ends of a torque arm which prevents rotary movement of the caliper member.

Abstract: In a known motorcycle brake system, the pedal master cylinder acts on the front-and rear-wheel brakes, and the hand master cylinder acts only on the front-wheel brake. The brake force regulator's control behavior is influenced by the hand master cylinder. This known arrangement has functional disadvantages, since the rear-wheel brake is evacuated of fluid if the hand master cylinder alone is actuated. In addition, the regulator's change-over point is reached at a relatively high pressure. These disadvantages are eliminated by the regulator of the present invention by the provision of a valve adapted to closed independently of the position of the regulator's stepped piston. The stepped piston is not moved when the hand master cylinder alone is actuated. Also, the regulator of the present invention provides an improved deceleration of the motorcycle.

Abstract: In a known motorcycle brake system, the pedal master cylinder acts on the front-wheel brakes, and the hand master cylinder acts only on the front-wheel brake. The brake force regulator's control behavior is influenced by the hand master cylinder. Known regulators have operational disadvantages and require a relatively high hand master cylinder pressure for shifting the stepped piston back to its rest position. Also, this pressure must be transmitted by the valve seat. These disadvantages are eliminated by the brake force regulator of the present invention which includes a pressure piston actuated by the pressure of the hand master cylinder and is in permanent interaction with the end surface of the smaller step of the stepped piston.

Abstract: A disc brake of a type incorporating therein a hydraulic pressure generator, the disc brake having a pair of friction pads disposed on both sides of a disc to be braked to confront each other across the disc; a guide shaft; and a caliper which is provided with a thrusting piston incorporated therein for pushing one of the friction pads against the disc with hydraulic pressure and is arranged to push the other friction pad against the disc as said caliper is moved on the guide shaft by a reaction to the thrusting action. The hydraulic pressure generator is disposed within the guide shaft and is provided with a cylinder which is formed within the guide shaft, a hydraulic pressure generating piston which slidably engages the cylinder and a hydraulic pressure generating chamber. The hydraulic pressure generating chamber communicates, through a passage means, with a hydraulic operation chamber which exerts hydraulic pressure on the thrusting piston.

Abstract: In a known motorcycle brake system with a brake force regulator, the pedal master cylinder acts on the front-wheel brake and on the rear-wheel brake, and the hand master cylinder acts only on the front-wheel brake. The brake force regulator's control behavior is influenced by the hand master cylinder. This known system has functional disadvantages because the rear-wheel brake becomes evacuated if only the hand master cylinder is actuated. The motorcycle brake system with brake force of the present invention eliminates this disadvantage by arranging for a brake caliper of the front-wheel brake to be actuated by the regulated pressure of the pedal master cylinder and the rear-wheel brake to be actuated by the non-regulated pressure of the pedal master cylinder.

Abstract: In a known motorcycle brake system, the pedal-actuated master cylinder acts on the front-wheel brake and the rear-wheel brake and the hand-actuated master cylinder acts on the front-wheel brake. The brake force regulator's control behavior provided by a stepped control piston is influenced by the hand-actuated master cylinder. This known system has functional disadvantages since the rear-wheel brake is evacuated of fluid by movement of the control piston if the hand-actuated master cylinder is actuated alone. In addition, the regulator's change-over point is reached at a relatively high pressure. These disadvantages are eliminated in the present invention by the provision of a valve adapted to close independently of the position of the stepped piston which is prevented from moving when the hand-actuated master cylinder is actuated alone by a stop against which the stepped piston abuts.

Abstract: The arrangement for coordinated braking of the two wheels disposed in tandem on a vehicle includes in combination a first brake with friction linings situated at a fixed distance from the axis of rotation of the corresponding wheel, a second disk brake the friction pads of which are situated at a variable distance from the axis of rotation of the disk and a mechanism permitting the variation of the distance simultaneously with the clamping of the pads of the second brake against the disk.

Abstract: There is disclosed a reducer unit for a motorcycle brake system including a hand master cylinder actuatable by hand force and a pedal master cylinder actuatable by force applied to the pedal. The reducer, which is connected to both master cylinders, ensures at all times optimum brake force distribution, in spite of different actuating forces. In this arrangement, the valve closure member controlling the connection between the pedal master cylinder and the rear-wheel brake is influenced by the pedal master cylinder pressure such that it is allowed to assume its closing position only when pressure is built up by the pedal master cylinder. Vacuum otherwise occurring in the rear-wheel brake is thus effectively avoided.

Abstract: A breaking apparatus for motorcycles in which a piston movable within a master cylinder for the front wheel, is actuated by operating a hand lever. Output and input liquid pressure chambers are provided in front and at the back of the piston, respectively. At least one auxiliary piston is movable within a master cylinder of the rear wheel, and may be actuated by operating a foot pedal. At least one output liquid pressure chamber is located in front of the auxiliary piston, and the output liquid pressure chambers of the master cylinder for front and rear brakes communicate with front and rear wheel brakes, respectively. The output liquid pressure chamber of the master cylinder for the rear wheel communicates with the input liquid pressure chamber of the master cylinder for the front wheel.

Abstract: A braking device for a bicycle comprising brake shoes positioned on opposite sides of a wheel of the bicycle for being brought into operative contact with the wheel to effect braking of the bicycle under the action of a movable brake handle and in opposition to a restoring spring. A hydraulically actuable pressure member is operatively coupled to each brake shoe to displace the same to its braking position and a hydraulic cylinder is operatively coupled to the brake handle for being actuated thereby. A hydraulic circuit connects the hydraulic cylinder and the hydraulically actuable pressure members for pressurizing the latter when the hydraulic cylinder is actuated by the brake handle.

Abstract: In an anti-skid hydraulic braking system for a vehicle a master cylinder supplying fluid under pressure to apply a brake includes an operating piston and a boost piston both working in a common bore with a boost chamber defined in the bore between adjacent ends of the piston. A boost control valve is provided between the pistons and is movable between a normally open inoperative position in which the boost chamber is in communication with return and outlet ports in the cylinder and an operative closed position when the master cylinder is operated in which the boost chamber is isolated from the return and outlet ports so that pressure in the boost chamber is increased to advance the boost piston in the bore to pressurize liquid in a pressure space.

Abstract: A disc brake for use in a two-wheeled vehicle includes a calliper straddling a rotatable disc and having an actuator disposed on one side of the disc, a guide pin disposed outside of the outer periphery of the disc and extending across the disc in a direction normal to the surface of the disc for mounting the calliper on a stationary part of the vehicle and means for preventing rotation of the calliper around the guide pin, which means is disposed inside of the outer periphery of the disc and at the aforementioned one side relative to the disc.

Abstract: A disc brake for a two-wheeled vehicle, such as a motorcycle, is disclosed. The brake includes a torque member fastened to a non-rotative part of the vehicle, a two-piece caliper carried by the torque member, and a pair of pins carried by the caliper which slidably support a pair of friction elements adjacent opposed friction faces of a convention disc brake rotor. In one embodiment of the invention, the torque member is rigidly secured to the pins, a sliding connection being provided between the pins and the caliper to permit the latter to slide axially with respect to the rotor. Bolts are provided to hold the pieces of the caliper together. In the other embodiment of the invention, the torque member and the caliper are integral with one another, and the attachment between the torque member and the vehicle permits the brake to move axially with respect to the rotor. In this embodiment, the pins which slidably support the friction elements are bolts which also hold the two pieces of the caliper together.

Abstract: A disc brake for a two-wheeled vehicle, such as a motorcycle, is disclosed. The brake includes a torque member fastened to a nonrotative part of the vehicle, a two-piece caliper carried by the torque member, and a pair of pins carried by the caliper which slidably support a pair of friction elements adjacent opposed friction faces of a convention disc brake rotor. The torque member is rigidly secured to the pins, a sliding connection being provided between the pins and the caliper to permit the latter to slide axially with respect to the rotor. Bolts are provided to hold the pieces of the caliper together. The pins which slidably support the friction elements are bolts which also hold the two pieces of the caliper together.

Abstract: A motorcycle brake assembly includes a mount attachable to the motorcycle frame; a braking cylinder on the mount and having a plunger; a plunger actuating lever pivotally supported on the mount; and a crank pivotally supported on the mount and having arms respectively operatively connected with the lever and with a brake pedal in such manner that the mechanical advantage of force transmission is increased as the crank is rotated by the brake pedal.

Abstract: Caliper type bicycle brakes for the front and rear wheel are actuated simultaneously by a single actuator assembly mounted adjacent the handlebar. Hydraulic fluid under pressure is delivered to the brakes through two self-contained hydraulic circuits, one for the front brake and one for the rear brake. The brake system includes a device for applying a greater braking force at the front wheel than at the rear wheel. In an alternate embodiment the brake system is actuated by the chain drive system of the bicycle. Improved brake shoe elements and a device for wiping water from the wheel rim for enhanced wet weather braking are also disclosed.