The proposal is for an improved expansion device for a drum brake having an integrated readjustment unit having a readjusting screw which can be locked therein by a spring-loaded latching unit which, for a reliable readjustment function with a reduced level of force, provides for the latching unit to allow a defined idle rotation of the readjusting screw, which is defined structurally by a first stop acting in a first direction of revolution and a second stop acting in the opposite direction of revolution.

An electrically actuated brake assembly includes a brake disc, a brake pad, and an electric motor having a rotatable output shaft. A service brake transmission in operative rotational communication with the output shaft causes service braking of the vehicle in response to rotation of the output shaft, and an adjuster mechanism is operable to adjust a distance between the brake pad and the brake disc. An adjuster transmission operatively connected between the output shaft and the adjuster mechanism causes operative rotational communication between the output shaft and the adjuster mechanism when the adjuster transmission is engaged so as to transmit rotational movement of the output shaft to the adjuster mechanism, and causes there to be no operative rotational communication between the output shaft and the adjuster mechanism when the adjuster transmission is disengaged so as to not transmit rotational movement of the output shaft to the adjuster mechanism.

Provided is an electric brake including: a brake mechanism configured to transmit, based on a braking request, a thrust force generated through drive of an electric motor to a piston configured to move brake pads to be pressed against a disc rotor; and an ECU for rear electric brake configured to control the drive of the electric motor, and to move, in a non-braking state, the piston to a predetermined clearance position at which a clearance between each of the brake pads and the disc rotor is a predetermined amount. The ECU for rear electric brake is configured to drive the electric motor so that a period from generation of the braking request to a start of the pressing of the disc rotor by the brake pads is a predetermined period regardless of a position of the piston at a time when the braking request is generated.

A brake system includes an electromechanical brake having a friction surface, a lining support having a brake lining, an electric motor for moving the lining support, and a control and monitoring unit. The control and monitoring unit ascertains, from a first value ascertained during a first movement of the lining support by the electric motor, an operating parameter of at least one part of the brake, and a second value ascertained during a second movement opposite to the first movement of the lining support, by the electric motor, an operating behavior value for a real operating behavior of the relevant brake, and ascertains, by comparing the at least one real operating behavior value to at least one stored operating behavior expectation, a correction factor. The brake control system is corrected by the one correction factor and a regulator of the electric motor is activated using the corrected brake control signal.

Disk brake systems including disk brake systems that are motor actuated are discussed. As a part of these brake systems, various piston assemblies are also discussed, including piston assemblies that include a piston; a spindle; a ball screw assembly within the piston, wherein the spindle forms a lead screw with an interior surface of the ball screw assembly and the ball screw assembly and the lead screw are configured for the lead screw to move linearly followed by the ball screw assembly moving linearly to move the piston upon application of the brake. Additional embodiments of piston assemblies that include ball ramp actuators are also discussed.

A clutch assembly includes a clutch disc configured to engage a prime mover, a pressure plate having a clutch biasing element, and a clutch engagement member structured to couple to a clutch actuation element at an engagement position. The clutch adjustment member maintains a consistent engagement position as a face of the clutch disc experiences wear.

A clutch assembly includes a clutch disc configured to engage a prime mover, a pressure plate having a clutch biasing element, and a clutch engagement member structured to couple to a clutch actuation element at an engagement position. The clutch adjustment member maintains a consistent engagement position as a face of the clutch disc experiences wear.

A dual clevis pin retainer spring assembly and kit used to attach a brake rod clevis to the brake actuator lever and the push rod for an associated automatic slack adjuster. The pin used to attach the brake actuator lever to the clevis is configured to include an engagement slot to retain an associated retainer spring pin with the pin.

A dual clevis pin retainer spring assembly and kit used to attach a brake rod clevis to the brake actuator lever and the push rod for an associated automatic slack adjuster. The pin used to attach the brake actuator lever to the clevis is configured to include an engagement slot to retain an associated retainer spring pin with the pin.

A brake system includes an electromechanical brake having a friction surface, a lining support, an electric motor for moving the lining support, a spring acting on the lining support, and a control and monitoring unit. A control and monitoring unit ascertains from at least one first value ascertained during a first movement of the lining support by the electric motor, an operating behavior value for a real operating behavior of an operating parameter of the relevant brake, and ascertains, by a comparison of the at least one real operating behavior value to at least one stored operating behavior expectation, a correction factor. The brake control system corrects by the one correction factor and activates a regulator of the electric motor using the corrected brake control signal. The control and monitoring unit is performs a calibration by a spring force of the at least one spring during the first movement.