Abstract: A disc brake caliper assembly for a rotary disc brake of a vehicle which has a wear adjustment mechanism is provided. The disc brake caliper assembly (10) includes a caliper housing (14) with a piston (28) slidably mounted therein, but prevented from rotating by a lug (30) on a brake shoe (16) secured thereto which keys in a groove (32) in the piston. An actuator screw (44) and actuator nut (66) are positioned in an internal bore (65) in the piston for mechanical actuation of the brakes. If the brake pads (20,22) wear, on hydraulic actuation of the brakes, a thrust washer (70) engages and moves the actuator nut axially along the actuator screw to a new position which restricts reverse movement of the piston to a new (wear adjusted) position relative to the caliper housing. An actuator cone (68) having a friction clutch surface biased into engagement with a friction clutch surface on the piston prevents reverse movement of the actuator nut.

Abstract: A disc braking (10) for a motor vehicle comprising a rotor (12); inner and outer brake pads (14,16) disposed on opposite sides of the rotor and movable into brake engagement therewith; a caliper (18) comprising a piston (26) for urging one of the brake pads against the rotor, a caliper housing (28) having a cylinder (32) positioned on one side of the rotor within which the piston is slidably movable under the action of fluid pressure in the cylinder, and a fluid line (34) in the caliper for supplying fluid to the cylinder for movement of the piston; and a proportioning valve (44) in the fluid line and integral with the caliper for preventing fluid pressure above a predetermined level acting on the piston. Reduces risk of wheel lock on braking. Provides a unitary caliper and proportioning valve prior to installation on a motor vehicle.

Abstract: A brake wear indicating device (10) including an insulated electrical conductor (12) with an electrical connector (16) at one end (18) for electrical connection with a warning device and, an end cap (20) of electrically insulating material on the other end (22) of the electrical conductor. The electrically insulating material secures the brake wear indicating device of an aperture (24) in a backing plate (26) of a brake pad (28) or brake shoe with the other end of the electrical conductor passing through an aperture in the backing plate from an outer surface (30) thereof to protrude from an inner surface (32) thereof. The end cap includes an abutment edge (38) for engaging the outer surface of the backing plate, a cap portion (40) secured to the other end of the electrical conductor.

Abstract: A disc brake caliper assembly for a rotary disc brake of a vehicle which has a wear adjustment mechanism is provided. The disc brake caliper assembly (10) includes a caliper housing (14) with a piston (28) slidably mounted therein, but prevented from rotating by a lug (30) on a brake shoe (16) secured thereto which keys in a groove (32) in the piston. An actuator screw (44) and actuator nut (66) are positioned in an internal bore (65) in the piston for mechanical actuation of the brakes. If the brake pads (20, 22) wear, on hydraulic actuation of the brakes, a thrust washer (70) engages and moves the actuator nut axially along the actuator screw to a new position which restricts reverse movement of the piston to a new (wear adjusted) position relative to the caliper housing. An actuator cone (68) having a friction clutch surface biased into engagement with a friction clutch surface on the piston prevents reverse movement of the actuator nut.

Abstract: A disc brake (10) for a motor vehicle comprising a rotor (12); inner and outer brake pads (14,16) disposed on opposite sides of the rotor and movable into braking engagement therewith; a piston (18) for urging the inner brake pad against the rotor; a support member securable to the motor vehicle; and a caliper housing (22) slidably supported on the support member, the caliper housing having a cylinder (20) positioned on one side of the rotor and containing the piston, and an arm member (26) on the other side of the rotor for urging the outer brake pad into engagment with the rotor when the piston acts on the inner brake pad, the arm member comprising a first limb (28) on the leading side of the arm member relative to a normal direction of rotation of the rotor, and a second limb (30) on the trailing side of the arm member relative to a normal direction of rotation of the rotor, each limb having a boss (32,34) protruding therefrom for engaging the outer brake pad, the boss (22) on the first limb having a small

Abstract: A disc brake (70) for a motor vehicle comprising a stationary support (74) for mounting on the motor vehicle; a caliper (72) slidably mounted on the stationary support; at least one pin (14) fixed to either the stationary support or the caliper and slidably positioned in an axial bore (16) in the other to extend therethrough for slidably mounting the caliper; and a sealing boot (36) having a first end (38) positioned in the axial bore in sealing engagement with the axial bore, the other end (40) sealingly engaging the pin outside the axial bore, with an elastomeric bellows portion (42') extending between the two ends; wherein the first end comprises a plastics insert (44) having a substantially cylindrical portion (46) in sliding engagement with the pin and a resilient lip (48) having a free end (52) directed away from the cylindrical portion to provide the sealing engagement with the axial bore. Reduces risk of sticking at the sliding interface between the pin and the sealing boot.

Abstract: The present invention provides disc brake caliper assembly for braking a rotary disc brake of a vehicle, the disc brake caliper assembly having a mounting bracket, first and second brake shoes, and a caliper housing mounted solely on the brake shoes and comprising a bridge section for extending across the outer periphery of the rotary disc brake, wherein the mounting bracket has shoulders each spaced from a corresponding aperture, each aperture being positioned outwardly of its corresponding shoulder and having a removable pin mounted therein and extending therefrom, the shoulders, apertures and pins extending in a lengthwise direction substantially parallel to the bridge section of the caliper housing, wherein the mounting bracket also defines an abutment adjacent each shoulder, and wherein each brake shoe has a leg portion extending from each end thereof in a lengthwise direction substantially perpendicular to the bridge section of the caliper housing such that each leg portion is retainable between a corre