Abstract: Herein disclosed is a cabling structure of a parking cable for a drum brake which is equipped with a backing plate, a brake shoe and a parking lever. A pulley is hinged in a swinging manner to the backing plate or the brake shoe and is formed with two arcuate grooves having different radii measured from the hinging axis. First and second cables are hung in the two arcuate grooves, respectively, and are connected to a brake actuating mechanism and the parking lever, respectively. The direction of leading out the parking cable can be different from that of the force for pulling the parking lever without any breakage of the parking cable. The pulley may alternatively be formed with one arcuate groove. Then, the second cable connected to the parking lever is retained on the pulley such that it extends to partially contact with the first cable.

Abstract: A disc brake includes a rotor, an opposed pair of friction pads each arranged on an opposite side of the rotor, and a caliper which straddles the circumferential periphery of the rotor. The caliper has a pair of leg portions each arranged on an opposite side of the rotor. The caliper is arranged to push one of the friction pads against the rotor by a piston disposed within a cylinder formed in one leg portion and to push the other friction pad against the rotor on the other side with the other leg portion which is arranged to be slidable by a force of reaction to the thrusting action of the piston. A load distribution plate part is formed at the end of the piston which engages the back of the friction pad. This plate part on the piston is arranged to restrict rolling or turning of the piston around its axis by engaging the inner surface of a saddle portion of the caliper straddling the rotor.

Abstract: A wheel lock prevention apparatus for use in a motor vehicle includes a main passage connected between a master cylinder and a brake unit for transmitting a brake fluid pressure, a first normally-open solenoid-operated valve disposed in the main passage, a reservoir mechanism for storing a brake fluid, a second normally-closed solenoid-operated valve having one end connected to the main passage between the brake unit and the first normally-open solenoid-operated valve and an opposite end to the reservoir mechanism, and a pump mechanism disposed between the reservoir mechanism and the brake unit for returning the brake fluid from the reservoir mechanism to the brake unit. The pump mechanism is actuated when there is no signal indicating wheel locking and there is a signal representative of a movement of a reservoir piston in the reservoir mechanism.

Abstract: Herein disclosed is a vehicular anti-lock system of the type, in which a valve mechanism is disposed in a main passage which connects a master cylinder and a brake system such that its opening and closing operations are controlled by the movement of a control piston having its one end subjected to the pressure of the brake system. A fail-safe piston is made movable in a cylinder and has its one end engaging with the valve seat member of the valve mechanism and its other end connected with a liquid pressure source which is independent of the master cylinder. The control piston is made movable in the fail-safe piston and has its other end facing a control chamber. Between the liquid pressure source and the control chamber, there is connected a first valve which is adapted to be closed in response to a brake releasing signal. Between the control chamber and a reservoir, there is connected a second valve which is adapted to be opened in response to the brake releasing signal.

Abstract: A pad clip for a disc brake is arranged to have friction pads which are carried by a support pushed against a disc with the lug parts which are formed at the ends of the friction pads engaged with stepped parts of the support. The pad clip is provided with hook parts which are arranged to engage the lug parts of the friction pad and, during brake application, to restrict the movement of the friction pad on the braking face of the disc.

Abstract: A semi-metallic friction pad subjected to rust preventive treatment, sides of which are applied with a heat-proof binder solution added with rust proof metallic powder therein. The rust proof metallic powder is single or mixed powder of stainless steel, aluminum or aluminum alloy, nickel or nickel alloy and chrome or chrome alloy. The heat-proof binder solution is a heat-proof resin solution of phenol resins, epoxy resins, melamine resins or silicon resins.

Abstract: In a device for preventing a wheel lock condition of a vehicle, a fluid passage switching valve is inserted in a rear wheel brake fluid pressure transmission system. The fluid pressure switching valve is closed during brake application in so far as it is within a braking force range in which a rear wheel braking force must be lower than a front wheel braking force. The speeds of revolution or deceleration of the front and rear wheels are compared by comparison means. When the comparison means detects that the deceleration of the front wheel becomes greater than the deceleration state of the rear wheel by a predetermined value, the fluid passage switching valve opens for a given length of time to allow the rear wheel brake fluid pressure to increase.

Abstract: In a disc brake, the backing plate of the friction pads is guided and supported by the caliper outside of the brake disc, and both end portions of the backing plate is slidably supported by both end portions, arranged in the circumferential direction, of the ceiling surface which is provided on the caliper so as to mount over the brake disc. A piece extended from the central portion of the peripheral portion of backing plate is inserted into a groove formed in the central portion of the ceiling surface.

Abstract: A differential master cylinder adapted for use as fluid pressure generating source in a brake system comprises a cylinder body having a stepped cylinder formed therein; a stepped piston arranged to be slidable within the stepped cylinder; a first chamber defined by the end of a portion of smaller diameter of the stepped piston and a portion of smaller diameter of the stepped cylinder; a second chamber defined by the stepped piston and a portion of larger diameter of the stepped cylinder; a first fluid passage provided at the stepped piston and arranged to have the first and second chambers intercommunicate; a check valve arranged in the first fluid passage to close when fluid pressure within the second chamber reaches a first setting value; and a relief valve arranged to open to return the fluid from the second chamber to a reservoir when the fluid pressure within the second chamber reaches a second setting value which is higher than the first value.

Abstract: This invention relate to an improvement of the resinous brake piston of disk type, particularly the synthetic thermosetting resin piston of disk type whose opening end is thermally reinforced by simultaneous casting of the heat-resistant material, so as to prevent the crack in the opening end of the piston even when it comes into direct contact with the back metal of the friction pad of high temperature in the disk brake.

Abstract: In a disc brake a piston is axially slidably mounted within a cylindrical space in a cylinder with an opening in the end of the cylinder communicating with the space. The piston is arranged to move axially through the opening and to press a friction pad into engagement with a disc. The piston is in sliding contact with the surface of the space in the cylinder body. A boot protector covers a boot extending between the inside of the cylinder body and the piston. The boot protector is formed, in part, of a rigid ring body fixed to the opening in the cylinder body in which the piston is housed and of an elastic ring body secured to the inner circumference of the rigid ring body. The boot protector covers the surface of the boot facing toward the disc. The boot covers the surface of the piston disposed in sliding contact with the surface of the cylinder.

Abstract: A transfer element for sandblast carving comprising, in order, a flexible substrate, an intermediate resin layer which is strippable from the flexible substrate and is a pressure-sensitive adhesive to an etchable material, and a resist comprising a photocured photosensitive resin.

Abstract: An improvement in the arrangement of pad clips provided between a support and friction pads of a disc brake. Each pad clip is interposed in between guide grooves of the support and protruding parts of each friction pad in such a way as to provide anti-rattling forces with a less number of parts than the conventional arrangement; to provide a guiding face for the friction pad; and to facilitate assembly work.

Abstract: In a non-asbestos friction material comprising ferrous metal particle and/or ferrous metal fiber, organic dust, inorganic substance, lubricant, metal powder, fibrous reinforcing material and thermosetting resin, the friction material being characterized in containing 0.01-5.0 wt. % of at least one material selected from the group consisting of boric acid, borate, phosphoric acid and phosphate as an anticorrosive component. Further, in the non-asbestos friction material containing rubber, organic friction dust, inorganic powder, lubricant, non-ferrous metal powder and/or non-ferrous fiber, fibrous reinforcing material, thermosetting resin and other friction material, the friction material characterized in containing at least one material selected from the group consisting of boric acid, borate, phosphate acid and phosphate as an anti-corrosive component and containing no ferrous component.

Abstract: A deceleration sensing type fluid pressure control device for vehicle brake system having a control piston; a proportioning action mechanism capable of varying the reducing value of output pressure from input pressure in relation to a load imposed on the control piston; an adjusting piston one end of which is connected to a fluid pressure source through a passage arrangement; and a valve mechanism which is disposed in the passage arrangement and closes when the deceleration of the vehicle reaches a predetermined value. The fluid pressure control device is provided with a swaying lever which has a middle point thereof serving as a fulcrum. One end of the lever engages the control piston. Between the other end of the lever and the other end of the adjusting piston, there is provided a control spring which imposes the above stated load on the control piston.

Abstract: Reduction in weight and simplification of structure of a pin type disc brake for a vehicle are attained by using left and right guide pins. In the past such pins been used to carrying a caliper and permit movement thereof in the axial direction of a disc to push a pair of inner and outer friction pads against both sides of the disc. In this brake disc the pins are arranged to carry the inner and outer friction pads in addition to the caliper.

Abstract: Fe-base sintered alloy friction materials containing 3 to 15% of bismuth of Bi-Pb alloy containing 5 to 100% bismuth, which provide very stable friction coefficient over a wide range from low temperature zones to high temperature zones, and very excellent wear resistance.

Abstract: A friction material wherein a heat-resistant organic fiber, which is a carbon fiber and/or a phenol fiber less than 10 mm in length, is mixed in a composition of the friction material containing a ferrous fiber and formed with a thermosetting resin binder. In particular, a friction material for braking is formed from a composition containing 5-60 wt. % of a ferrous fiber, 0.3-20 wt. % of a carbon fiber and/or a phenol fiber of less than 10 mm in length, 0.5-15 wt. % of an organic dust, 2-20 wt. % of an inorganic filler, 5-25 wt. % of lubricant, 0.2-10 wt. % of an antimony trioxide, 0-20 wt. % of a metallic powder and 3-15 wt. % of a phenol binder under heat and pressure.

Abstract: A double piping type hydraulic pressure control device in which hydraulic pressure control of a hydraulic pressure channel A is transmitted to another channel B in such a manner that the hydraulic pressure to be exerted on a balance piston for hydraulic pressure control is obtained solely from the hydraulic pressures of the two output chambers while two input hydraulic pressures are arranged to have nothing to do with the control action.

Abstract: An automatic gap adjusting device for a disc brake incorporating a mechanical brake mechanism. A recessed part is formed in the face of a hydraulic operating piston on which a sleeve nut 6 screwed to a spindle to be driven by an external force is arranged to abut. The recessed part is provided with a circumferential guide face. The face of the sleeve nut which is abutting on the piston is provided with a stepped protrudent part having its diameter slightly smaller than the inner diameter of the circumferential guide face of the recessed part. The movement of the sleeve nut in the axial direction of the piston is guided by fitting engagement between the guide face of the recessed part of the piston and the protrudent part of the sleeve nut to prevent the sleeve nut from tilting relative to the axis of the piston 3 by the fitting engagement to maintain a normal brake clearance.