An electromechanical brake system includes a housing defining a mechanism cavity. An apparatus for force application includes a first piston, including a first piston motivator comprising a first push rod and an actuator. A brake pad is operatively connected to both the first and second pistons for longitudinal driving thereby. A rocker arm is operatively connected to both the first and second pistons for force transmission therebetween. A pivot bearing rotatably supports the rocker arm. The actuator is configured to move selectively longitudinally with respect to the first push rod to move at least a portion of the first piston toward the brake pad. The pivot bearing is maintained in a predetermined longitudinal position as a reaction force is developed between the first piston and the brake pad. The rocker arm transmits at least a portion of the reaction force from the first push rod to the second piston.

The invention relates to a brake assembly (100; 200; 300), comprising: a caliper comprising a brake cylinder (5) formed in one piece with an outer clamping portion (6), the brake cylinder (5) defining an axial direction (9) and the outer clamping portion (6) forming a pair of outer clamping fingers (6a, 6b) and a recess (7) formed in between the outer clamping fingers (6a, 6b); a brake piston (12) received in the brake cylinder (5) and configured to move axially with respect to the brake cylinder (5); and an inner brake pad assembly (4a) and an outer brake pad assembly (4b), the inner brake pad assembly (4a) and the outer brake pad assembly (4b) disposed axially in between the brake piston (12) and the outer clamping portion (6), wherein the pair of outer clamping fingers (6a, 6b) of the outer clamping portion (6) define a pair of outer clamping surfaces (18a, 18b) facing the brake piston (12), the outer clamping portion (6) configured to exert a clamping force on the outer brake pad assembly (4b) by means of the outer clamping surfaces (18a, 18b). A clamping portion (16) for exerting a clamping force on the inner brake pad assembly (4a) may protrude out of the brake cylinder (5) and extend fully or at least partially laterally outward from the brake piston (12). Alternatively, a maximum lateral extension of the brake piston (12) may be equal to or larger than a maximum lateral extension of the pair of outer clamping surfaces (18a, 18b), wherein the inner clamping portion (16) extends fully or at least partially laterally inward from the brake piston (12).

A brake device includes a rotating member; a fixed member; a pressing member configured to generate an engaging force between the rotating member and the fixed member; an elastic member configured to apply an elastic force to the pressing member; an engaging force application mechanism configured to apply the engaging force to the pressing member; a torque transmission member configured to transmit torque transmitted from the rotating member to the fixed member; a torque receiving member configured to receive the torque; a conversion mechanism configured to convert the torque into thrust in the axial direction and apply the thrust to the engaging force; and an actuator configured to move the torque receiving member in the axial direction by generating thrust in the torque receiving member and adjust a position of the torque receiving member along the axial direction based on a reaction force against the engaging force.

A brake device includes a rotating member; a fixed member; a pressing member configured to generate an engaging force between the rotating member and the fixed member; an elastic member configured to apply an elastic force to the pressing member; an engaging force application mechanism configured to apply the engaging force to the pressing member; a torque transmission member configured to transmit torque transmitted from the rotating member to the fixed member; a torque receiving member configured to receive the torque; a conversion mechanism configured to convert the torque into thrust in the axial direction and apply the thrust to the engaging force; and an actuator configured to move the torque receiving member in the axial direction by generating thrust in the torque receiving member and adjust a position of the torque receiving member along the axial direction based on a reaction force against the engaging force.

A caliper brake featuring a hydraulic piston assembly includes a housing, a movable piston within a chamber of the housing, a first port providing a first fluid pathway into the chamber, and a redundant seal assembly. The redundant seal assembly may include a first pressure seal disposed about a first interior circumference of the chamber disposed above the first port, a second pressure seal disposed about a second interior circumference of the chamber disposed above the first pressure seal, and a second port disposed between the first pressure seal and the second pressure seal, the second port providing a second fluid pathway from inside of the chamber to outside of the chamber, and the second port establishing a bleed-off for fluid traversing above the first pressure seal such that the second pressure seal experiences a lower fluid pressure than the first pressure seal during normal operation of the caliper brake.

A caliper brake featuring a hydraulic piston assembly includes a housing, a movable piston within a chamber of the housing, a first port providing a first fluid pathway into the chamber, and a redundant seal assembly. The redundant seal assembly may include a first pressure seal disposed about a first interior circumference of the chamber disposed above the first port, a second pressure seal disposed about a second interior circumference of the chamber disposed above the first pressure seal, and a second port disposed between the first pressure seal and the second pressure seal, the second port providing a second fluid pathway from inside of the chamber to outside of the chamber, and the second port establishing a bleed-off for fluid traversing above the first pressure seal such that the second pressure seal experiences a lower fluid pressure than the first pressure seal during normal operation of the caliper brake.

The invention relates to a disc brake, comprising a brake carrier, a brake caliper, brake shoes, and an actuating piston. The brake carrier has at least one mounting point for mounting on a vehicle. The actuating piston is displaceably accommodated on the brake caliper and is actuatable for carrying out a service brake function of the disc brake. At least one further actuating piston is provided, which in the direction of its longitudinal axis is displaceably accommodated on the brake caliper. For carrying out the service brake function, the at least two actuating pistons are actuatable, and for carrying out a parking brake function, one of the actuating pistons is actuatable. The invention further relates to a disc brake system and a parking brake system.

This disc brake includes a cylinder bore into which a piston is fitted, a seal groove provided in the cylinder bore as an annular groove, and a seal member which has a rectangular cross section shape and which is fitted into the seal groove and seal a space between the piston and the cylinder bore. The seal groove includes a bottom surface portion, a side surface portion, and a chamfered portion. The chamfered portion is formed to expand an opening of the seal groove in the axial direction of the cylinder bore and has two types of curvature radii (r1 and r2).

A parking brake for a wheel rotor having a brake pad associated therewith includes a housing defining first and second passages. First and second pistons are provided in the respective first and second passages. Spindles are threadably connected with each piston. A clutch unit is connected to the spindles. The clutch unit has a first condition allowing relative rotation between the spindles and the pistons such that the pistons are axially movable within the passages and into engagement with the brake pad in response to hydraulic pressure applied to the pistons. The clutch unit has a second condition preventing relative rotation between the spindles and the pistons such that pistons remains engaged with the brake pad when hydraulic fluid pressure is removed from the pistons.

A brake assembly including an operating shaft, a yoke, and a rotating element. The rotating element bearing may be positioned between a convex bearing surface of the operating shaft and a concave bearing surface of the yoke such that the rotating element bearing may be configured to move relative to the operating shaft and relative to the yoke during actuation of the brake.