Abstract: Method of processing brake pads having a lining member mounted on a back plate is disclosed. An exposed surface of the lining member initially having a substantially planar configuration is heated to a warping temperature between substantially 300.degree. C. and substantially 800.degree. C. to be permanently warped the brake pad into a substantially concave configuration. Then the exposed surface of the lining member is ground into a substantially planar configuration, while maintaining the warped condition of the brake pad.

Abstract: The oil tightness between a union and a seat portion on the outer side surface of a caliper is maintained by a copper packing. A rubber packing is provided on the outside of the copper packing so as to prevent water drops from adhering to the copper packing. As a result, copper ions never dissolves into the water drops, so that the aluminum caliper is prevented from corroding.

Abstract: To dispense with a proportioning valve for the rear wheel brake fluid pressure line system of a brake anti-locking controller for a vehicle to reduce the cost of the controller. A brake fluid pressure controller comprises a controller for opening and closing the hold valves of a rear wheel brake fluid pressure line system at the time of brake fluid pressure increase after the start of braking of the vehicle but before the start of the brake anti-locking control thereof in order to keep the rate of the break fluid pressure increase in the rear wheel brake fluid pressure system lower than that of the brake fluid pressure increase in the front wheel brake fluid pressure line system.

Abstract: A non-asbestos friction material comprising mica powder adhered with aluminum phosphate and then subjected to the heating treatment, friction modifier and thermosetting resin binder is disclosed. The material is used for the brake lining and clutch facing for cars and industrial machinery.

Abstract: A seal holding shuttle employable for fitting elastic seal members to a caliper includes in a main body thereof an abutment plate having a cavity formed therein to receive an adjust bolt, a support member for clamping each elastic seal member between the abutment plate and the support member in the elastically bent state, four or more pins located on the inner diameter side of the elastic seal member so as to support a plurality of outward bent projections of the elastic seal member and first driving mean for displacing the abutment plate or the support member. In addition, the seal holding shuttle includes a plurality of expansive squeezing members for expanding a plurality of inward bent projections of the elastic seal member.

Abstract: A fluid operated booster comprising a first valve for controlling the communication between an accumulator and a hydraulic pressure chamber, and a second valve for controlling the communication between the hydraulic pressure chamber and a reservoir, in which, a brake pedal rod is operated to close the second valve and to open the first valve, so that a hydraulic pressure is applied from the accumulator to the hydraulic pressure chamber to act on a power piston, to cause the power piston to provide an operating force, which is transmitted to a master cylinder piston to provide a boosted hydraulic pressure for a brake system; in which, according to the invention, the first valve is a spool valve which is mounted on the brake pedal rod with a predetermined frictional force in such a manner that the spool valve is movable a predetermined distance, and the first valve is closed when the brake system is not in operation, so that no hydraulic pressure from the accumulator is applied to the sliding portion of the bra

Abstract: In the vehicle using the three-channel anti-lock control method based on the front wheel independent-and-rear wheel select-low, only when the third system speed Vs3 to which the left and right rear wheels belong is subjected to the anti-lock control due to the abruptly decreasing of the third system speed before at least one of the left and right front wheel systems begin to be subjected to the anti-lock control, the decrease of the brake hydraulic pressure is not started even if the third system speed Vs3 becomes lower than the above threshold speed VT1 (Vs3<VT1). In such case, only when the third system speed Vs3 becomes equal to or lower than the reference speed Vr (Vs3.ltoreq.Vr), the decrease of the hydraulic pressure is started. By doing so, an excessive decrease of the brake hydraulic pressure in the third system at the time of the braking during the turning of the vehicle is prevented.

Abstract: An anti-lock control method and apparatus is charecterized in that if the highest one VwH of the speeds of the four wheels of the vehicle is still lower than a prescribed threshold speed and not increasing at a second time point at which a prescribed time .DELTA.T has elapsed after a first time point at which the highest wheel speed becomes lower than the threshold speed, the estimated vehicle speed is modified to be equal to the highest wheel speed VwH, thereby preventing an automotive vehicle from being not braked at the start of anti-lock control immediately after an estimated vehicle speed has changed away from the actual vehicle speed as the wheel of the vehicle performs an acceleration slip before the start of the anti-lock control.

Abstract: An anti-lock control apparatus and method in which the brake hydraulic pressure is controlled by regarding an estimated vehicle speed as an actual vehicle speed, is characterized in that the estimated vehicle speed is corrected when the estimated vehicle speed is extremely reduced relative to the actual vehicle speed when the four wheel speeds are reduced at the same time, or the like, thereby preventing the estimated vehicle speed from being away from the actual speed. It can be applied as the correction of the estimated vehicle speed that the estimated vehicle speed may be maintained at a constant value, and the deceleration and acceleration of the estimated vehicle speed may be varied in accordance with a friction coefficient of the road surface.

Abstract: A method of manufacturing an aluminum-base composite disc rotor comprising the steps of preparing a rough-shaped disc rotor made of a mixture of aluminum powder or aluminum alloy powder with reinforcing particles or aluminum alloy, placing a mixture of aluminum powder or aluminum alloy powder with reinforcing particles or a preform made thereof on each of fixed positions of the rough-shaped disc rotor, and heating the mixture or the preform to at least a region of mashy state temperature to mold under pressure. Thereby the heat resistance and the wear resistance of the aluminum-base composite disc rotor for light-duty cars and industrial machinery are improved.

Abstract: A pin boot for use in a disc brake including a support mechanism for supporting a disc brake main body, a slide hole and a pin which is fittable with the support member, which pin boot comprises: a flange portion mounted to a boss portion of an opening of the slide hole of the support member; a freely expandable bellows which extends from the flange portion; and a seal portion which adjoins the bellows and is engageable with the pin of the disc brake, characterized in that the rigidity of at least one of the bellows, the seal member and a connecting portion for connecting the bellows with the seal member is non-uniform with respect to peripheral direction thereof.

Abstract: A traction control system for motor vehicles in which the occurrence of on-driving wheel speed is monitored during a time interval which begins when the traction control starts to a predetermined time period which elapses therefrom. In the event that no occurrence of no-driving wheel speed is detected during the aforementioned time interval, the throttle opening degree command value prevailing at the end of the time interval is decreased to a predetermined lower limit value in response thereto, while at the same time the control is changed to a low friction coefficient control mode.

Abstract: A brake hydraulic pressure generator is provided which employs a first booster piston which applies a brake pedal treading force to a brake piston and a second booster piston which selectively additively increases the braking pedal treading force applied to the brake piston. The second booster piston is operated by hydraulic fluid pressure supplied from an auxiliary hydraulic pressure source.

Abstract: A chamfering pressing machine including a blanking-chamfering section having a die, in which the die has a shearing die section, a chamfering die section and a guide section, a punch for shearing a sheet of material to form a product, the sheet of material being placed on said blanking-chamfering section, and a cushioning pad received in said die capable of an upward and downward movement so as to support said product.

Abstract: A method for controlling an anti-lock system of vehicles comprising steps of determining an estimated vehicle speed in accordance with the highest speed of four vehicle wheels speeds, calculating an average deceleration value at intervals of a constant time of the estimated vehicle speed, judging a frictional coefficient of the road surface on which the vehicle runs, and applying the frictional coefficient commonly to a plurality of control systems.

Abstract: In an anti-lock control system for a motor vehicle, the design is made such that when the motor vehicle is running on a rough road, it is detected that the motor vehicle is running on rough road, on the basis of which the amount of reduction of brake hydraulic pressure is restricted, thereby making it possible to shorten the braking distance of the motor vehicle.

Abstract: A hybrid carbon/carbon composite and a method of manufacturing a hybrid carbon/carbon composite, wherein a raw material containing carbon fibers with two or more different lengths and meso-phase carbon as a binder are raw materials. The raw materials are kneaded in the presence of adhesives, dried and defibrated, then molded under heat and pressure by hot press, and thereafter subjected to heat treatment.

Abstract: A controller for rear brakes of a vehicle adapted to control a braking member in accordance with an operation of a servo circuit through which pressurized air or pressurized liquid flows, includes: a fluid retarder provided to a rotary shaft which is rotated together with the rear wheels of the vehicle; an air source for applying pressure to a working liquid in the retarder to control the braking torque thereof; a liquid pressure generator communicated with the air source for converting a pressure of the air into that of the liquid; and proportioning valve member provided between the liquid pressure generator and the brakes for imparting a predetermined restriction to the pressurized liquid that flows between the liquid pressure generator and the brakes.

Abstract: A supply device for supplying a friction material to a conveyor provided in a devolatizing device. The friction material is agitated by an agitator and discharged therefrom to the conveyor. The supply device includes a pair of roller members each having at its outer periphery a plurality of annular grooves and a plurality of annular land portions. The annular grooves and the land portions extend circumferentially of the roller member and alternate. The axes of the pair of roller members are disposed parallel to each other. The land portions of one of the two roller members are engaged respectively in the annular grooves of the other roller member, and the land portions of the other roller member are engaged respectively in the annular grooves of the one roller member.

Abstract: A ring-shaped friction element for operating in oil provided with a plurality of oil containers at an inner peripheral portion thereof and a plurality of grooves communicating between the oil containers and an outer periphery of the friction element.