Abstract: A strut type automatic gap regulator for a drum brake in which a pair of brake shoes are mounted opposite each other and adapted to be moved apart in a braking action. Toothed portions of a strut engage similar toothed portions of a latch which engages a shoe for linear movement therewith. A first spring extends between the one shoe and the latch to urge the toothed portions together while a second spring extends between the strut and one shoe to bias the strut in a direction to extend its effective length.

Abstract: A disc brake caliper support structure is disclosed which comprises a rear arm forming a cylinder containing a piston for pressing a friction pad supported and guided by an anchor pin and a front arm for fixing another friction pad to make a caliper holding disc rotors with both the friction pads therebetween movable in the axial direction of guide pins by inserting a plurality of guide pins installed on the caliper in the support member fixed to a bogie frame. One guide pin and the support member are floatably coupled in such a manner as to oscillate relative to each other through a spherical bush and a spherical member, each being set in position by the support member. The other guide pin and the support member are floatingly coupled in such a manner as to oscillate relative to each other through a vibration-proof cylindrical rubber member with a cylindrical inner liner formed with rubber whose outer peripheral axial threads are sawtooth-like in the peripheral direction.

Abstract: The center of gravity of the caliper element of a disk brake of the guide tin type is positioned so as to evenly distribute the braking forces on the friction pads during operation of the brake, the benefit being that the linings of such friction pads are prevented from becoming unevenly worn.

Abstract: An anti-skid control system for motor vehicles is provided wherein a computed wheel speed Vv is set up on the basis of the highest one of the wheel speeds of the motor vehicle; a first reference speed VT1 and a second reference speed VT2 are set up which are lower than and follow the computed vehicle speed Vv either with a first and second predetermined speed difference respectively or with a first and a second predetermined ratio respectively, the first reference speed VT1 being higher than the second reference speed VT2 (VT1>VT2); in the case where the wheel speed continues decreasing with a deceleration lower than a predetermined threshold level of deceleration, reduction of brake pressure is started at a point of time when a predetermined time period T1 elapsed from a point of time when the wheel speed reached the level of the second reference speed VT2; and the reduction of the brake pressure is stopped at a point of time when the wheel speed was increased up to the level of the first reference speed

Abstract: An anti-skid control system for motor vehicles is provided wherein a computed vehicle speed is set up on the basis of respective wheel speeds of the motor vehicle; a reference speed which is lower than the computed vehicle speed by a predetermined amout and follows the computed vehicle speed with such a speed difference, is calculated on the basis of the computed vehicle speed; a high peak of the wheel speed is compared with the reference speed; when the high peak of the wheel speed is equal to or higher than the reference speed, the brake pressure is increased; and when the high peak of the wheel speed is lower than the reference speed, the brake pressure is reduced again.

Abstract: A caliper machining apparatus for machining a caliper for a disc brake is disclosed which comprises: a cutter for cutting the caliper, a facing mechanism for positioning and facing the cutter relative to the caliper. The facing mechanism includes a hollow rotary spindle, a facing head fixed to the rotary spindle, a slider movable only in a diametric direction of the facing head, and slidingly moved in eccentric relation with a rotary center of the rotary spindle and a facing shaft passing through the rotary spindle. The facing shaft is allowed to rotate with the rotary spindle but to be displaceable in an axial direction relative to the rotary spindle. The rotary spindle is rotated by a main motor. The facing shaft is moved in the axial direction by the rotation of a facing motor.

Abstract: A caliper machining apparatus for machining a caliper for a disc brake is disclosed which comprises: a cutter for cutting the caliper, a facing mechanism for positioning and facing the cutter relative to the caliper, and a caliper holding jig. The jig supports the caliper at several surfaces for machining by the cutter. The facing mechanism includes a hollow rotary spindle, a facing head fixed to the rotary spindle, a slider movable only in a diametric direction of the facing head, and slidingly moved in eccentric relation with a rotary center of the rotary spindle and a facing shaft passing through the rotary spindle. The facing shaft is allowed to rotate with the rotary spindle but to be displaceable in an axial direction relative to the rotary spindle. The rotary spindle is rotated by a main motor. The facing shaft is moved in the axial direction by the rotation of a facing motor.

Abstract: An anti-skid control system for motor vehicles is disclosed wherein in case the wheel speed is equal to or lower than a minimum speed which is detectable by a microcomputer, the wheel speed is set at a predetermined threshold speed level between the minimum speed and zero, thereby preventing reduction of brake pressure from being started when the wheel is lower than the threshold speed.

Abstract: An improvement in mounting brake shoes on disk brakes for railroad cars in which securing member is mounted beneath the open ended groove in the brake assembly to which the shoe is mounted. The securing member moves a predetermined longitudinal distance after being unbolted from the brake assembly, is pivotable relative thereto. The securing member has an anchoring pin protruding therefrom on which a brake shoe may rest as it is being lowered from the brake assembly so that a single person can change a heavy brake shoe without fear of injury.

Abstract: A brake booster which is capable of appropriately varying the amplifying ratio thereof according to information on a brake pedalling force obtained as an input of a brake system and information on deceleration of the vehicle obtained as an output of the brake system.

Abstract: A hydraulic booster with an antiskid device, comprising a hydraulic booster type pedal responsive device arranged to introduce from an accumulated pressure source, hydraulic pressure the level of which is determined depending on a pedalling force applied to a brake pedal, a master cylinder type control hydraulic pressure generating device which generates control hydraulic pressure according to the hydraulic action of the introduced hydraulic pressure, and a slave cylinder device arranged to generate braking hydraulic pressure by a power piston which moves by receiving the control hydraulic pressure at one end.

Abstract: A chip removing device for removing foreign matter such as chips from a groove defined circumferentially on an inner peripheral surface of a cylindrical workpiece, which includes a blowhead that is fittable into the cylindrical workpiece, a shaft for supporting the blowhead and a motor for rotating the blowhead and a motor for rotating the blowhead. A movable member having a scraper defined on one end thereof is mounted for movement within the blowhead and has a passage defined therein for supplying compressed air to a nozzle adjacent to the scraper. In operation, the blowhead is inserted into an interior cavity of a workpiece, the movable member is extended outwardly and the blowhead is rotated to cause the scraper to remove foreign matter from a groove that is defined in a inner peripheral surface of the workpiece, while compressed air is simultaneously applied to help loosen the foreign matter.

Abstract: An antiskid control system wherein the conventional method of performing an opening/closing change-over operation by a pulse train signal on a electromagnetic valve for increasing hydraulic braking pressure at a variable rate of increase is not employed but the pressure increasing rate is arranged to be variable by the use of an electromagnetic valve having some throttled position.

Abstract: An anti-skid control system for a motor vehicle in which, when a wheel speed to be controlled and being decreased through buildup of brake pressure becomes equal to a reference speed, this equality is judged as a fulfillment of a brake pressure reduction starting condition, and thus reduction of the brake pressure is started. The highest wheel speed is detected and a computed vehicle speed is set up based on the highest wheel speed by having the increase and decrease of the highest wheel speed limited to a predetermined range. The computed vehicle speed and the wheel speed to be controlled are compared; and when the comparison indicates that the wheel speed to be controlled is equal to or higher than the computed vehicle speed, no reduction of the brake pressure is started irrespective of whether the brake pressure reduction starting condition is fulfilled.

Abstract: In an anti-skid control system for motor vehicles of the type that the drive system thereof is switchable between two-wheel drive (2WD) and four wheel drive (4WD), the design is made such that when the drive system of the motor vehicle is switched, the anti-skid control system is changed such that under 2WD condition, it operates as a three-channel system wherein the front wheels of the motor vehicle are controlled independently and the rear wheels thereof are controlled on the basis of the lower one of the rear wheel speeds, while under 4WD condition, the anti-skid control system operates as cross or X-type two channel system wherein the wheels associated with each of the two channels are controlled on the basis of the lower one of the two wheel speeds.

Abstract: An anti-lock system adapted for a two-channel brake system with intercrossed piping for a pair of front and rear wheel brake devices; comprising a first passage line connecting the front and rear wheel brake devices of each of the two channels to a master cylinder; a second passage line connecting a reservoir to the front and rear wheel brake devices; a normally open type first valve device disposed in the first line; a normally closed type second valve device disposed in the second line; an electronic control device which produces signals for controlling the first and second valve devices according to the presence or absence of a locking tendency of the front or rear wheel; a third passage line is arranged to connect the reservoir to the rear wheel brake device; and a third valve device is arranged in the third line to be normally in a position A in which the rear wheel brake device is allowed to communicate with the master cylinder and to be switched by a signal produced from the electronic control device o

Abstract: A disc brake for service combined with parking operation is provided which includes a cylinder component, a shaft to be braked, a stator impossible to rotate relative to the cylinder component but possible to move axially relative to the shaft, a friction disc impossible to rotate relative to the shaft but possible to move axially relative to the shaft, a piston slidably engaged to the cylinder component and allowing the stator to frictionally engage the friction disc by a fluid pressure, a plate located at an end of the piston on the side opposed to the side facing the stator and the friction disc, the plate being rotatable by an exterior force, and a ball ramp mechanism provided between the piston and the plate.

Abstract: A frictional material is disclosed, which is characterized in that, with the metal-containing composite material infiltrated with metal into the pore portions of composite comprising carbon material reinforced with carbon fibers, the porosity of said composite is adjusted to 5 to 15 vol. % and a metal or an alloy with a melting point of 125.degree. to 1100.degree. C. is infiltrated in amounts of 3 to 10 vol. %.

Abstract: In a hydraulic brake system for a vehicle of the kind comprising a fluid pressure source having a reservoir and a hydraulic booster having a power piston arranged to receive the pressure fluid of a control fluid chamber which is proportional to a stepping down force on a brake pedal, a normally open type valve is disposed in a fluid passage provided for returning the pressure fluid of the control fluid chamber to the reservoir and is arranged to close in response to a braking pressure retaining signal produced when the vehicle is stopped by brake application.

Abstract: A self adjusting wheel cylinder for a drum brake including a brake drum and a brake shoe for exerting braking pressure on the drum with a shoe gap formed therebetween comprising a cylinder including an opening therein, hydraulic piston slidably mounted in the opening for activating the brake shoe upon movement in one direction, and for releasing the brake shoe upon movement in the other direction, and multiple adjusting screws within the cylinder for automatically adjusting the limit of movement of the piston in response to changes in the shoe gap of the brake, the multiple adjusting screws including a spindle having external screw-threads on both ends, the spindle is threadably mounted within the piston to one end thereof, and has a pair of multiple drive screws on the other end of the spindle for defining a fixed movement limit of the piston.