An S-cam brake system having is disclosed. The system includes a roller assembly, an S-cam, a shoe, and an S-cam brake. The roller assembly is configured to allow relative movement between a roller and a roller pin. The roller assembly is interposed between the S-cam and the shoe. Relative movement between a roller and a roller pin can compensates a defect in machining the outer contact surface of the S-cam roller or a defect in concentricity of roller seating depressions of the shoe.

An S-cam brake system having is disclosed. The system includes a roller assembly, an S-cam, a shoe, and an S-cam brake. The roller assembly is configured to allow relative movement between a roller and a roller pin. The roller assembly is interposed between the S-cam and the shoe. Relative movement between a roller and a roller pin can compensates a defect in machining the outer contact surface of the S-cam roller or a defect in concentricity of roller seating depressions of the shoe.

A railcar brake system includes a first brake beam and a second brake beam configured to be mounted on opposite sides of a bolster of a railcar truck; a brake cylinder connected to the first brake beam; a first lever and a second lever pivotally connected to the first brake beam at separate points, the first lever and the second lever also being connected to opposing ends of the brake cylinder to connect the brake cylinder to the first brake beam; a slack adjuster connected to the second brake beam; a first push rod connecting the first lever to the second brake beam and the slack adjuster; and a second push rod connecting the second lever to the second brake beam and the slack adjuster. Actuation of the brake cylinder causes movement of the brake beams via the first and second levers and the first and second push rods.

A railcar brake system includes a first brake beam and a second brake beam configured to be mounted on opposite sides of a bolster of a railcar truck; a brake cylinder connected to the first brake beam; a first lever and a second lever pivotally connected to the first brake beam at separate points, the first lever and the second lever also being connected to opposing ends of the brake cylinder to connect the brake cylinder to the first brake beam; a slack adjuster connected to the second brake beam; a first push rod connecting the first lever to the second brake beam and the slack adjuster; and a second push rod connecting the second lever to the second brake beam and the slack adjuster. Actuation of the brake cylinder causes movement of the brake beams via the first and second levers and the first and second push rods.

A braking system for a vehicle has a disc brake having a brake disc having a disc brake caliper and a pair of pads, an electric actuator operatively connected to a piston acting as a pusher on at least one of the pads, and a processing and control unit operatively connected to the electric actuator and programmed to move the piston and respective pad to a forward position to press the pad into contact with the brake disc during a braking demand, and bring the piston and respective pad to a rest or rearward position. A gap is identified between the pad and the brake disc. The processing and control unit is programmed to implement an algorithm that, in absence of a braking demand, operates the electric actuator by varying the gap according to at least one dynamic parameter of the vehicle defining a prediction of a braking demand.

A braking system for a vehicle has a disc brake having a brake disc having a disc brake caliper and a pair of pads, an electric actuator operatively connected to a piston acting as a pusher on at least one of the pads, and a processing and control unit operatively connected to the electric actuator and programmed to move the piston and respective pad to a forward position to press the pad into contact with the brake disc during a braking demand, and bring the piston and respective pad to a rest or rearward position. A gap is identified between the pad and the brake disc. The processing and control unit is programmed to implement an algorithm that, in absence of a braking demand, operates the electric actuator by varying the gap according to at least one dynamic parameter of the vehicle defining a prediction of a braking demand.

A disk brake apparatus may include a caliper body installed on the outer circumference of a disk; a piston member installed in the caliper body, and moved by hydraulic pressure; a brake pad pressed toward the disk by the piston member; and a shim plate installed between the piston member and the brake pad, formed in a plate shape, and abutting on a piston contact part installed on a surface of the piston member, facing the brake pad, the shim plate may include a cover shim brought into contact with the piston contact part; and a pad shim stacked on a surface of the cover shim, facing the brake pad, and including an opening formed through a region which overlaps at least a part of the piston contact part.

A brake device including a guide receiving area for connecting to a bearing component, forming a brake device bearing moveable in the direction of a first straight line. The brake device has a brake caliper with a first frictional surface and a first actuation surface, a pressing part being linearly guided along the first straight line relative to the brake caliper. The pressing part has a second frictional surface and a second actuation surface, and the brake device has a spreading element which interacts with the first actuation surface and the second actuation surface. The rotation of the spreading element changes the minimum distance between the frictional surfaces. A movement damping part coupled to the spreading element is designed to damp a translational movement of the spreading element relative to the bearing component in the guide receiving area parallel to the first straight line.

A disc brake assembly is provided that includes a camshaft extending from a slack adjuster. A disc brake rotor and a brake caliper bridge having an outer plate and an inner plate are provided. A brake caliper carrier is provided with an outer brake pad contained by the brake caliper carrier and an inner brake pad contained by the brake caliper carrier. A cam carrier having two openings is provided along with a pusher plate having a first surface in contact with the cam and a second surface in contact with the inner brake pad. A first and a second slide pin each extend through an opening in the cam carrier and an opening in the pusher plate and an opening in the inner plate of the brake caliper bridge and into the brake caliper carrier. A cam is mounted onto the camshaft such that rotation of the camshaft will rotate the cam, and the brake caliper bridge inner plate having a surface in contact with the cam. The brake caliper bridge outer plate having a surface in contact with the outer brake pad, such that upon rotation of the camshaft and the cam, the pusher plate adjusts the axial position of the inner brake pad and the brake caliper bridge outer plate adjusts the axial position of the outer brake pad, actuating the brake.

A disc brake and an adjuster system for a disc brake. The adjuster system may include a piston, a chamber, and a wear adjustment mechanism. The wear adjustment mechanism may be located within the chamber. The chamber may contain lubricant for lubrication of at least part of the wear adjustment mechanism.