Abstract: 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.

Abstract: The invention relates to a method for operating a vehicle brake system and to a vehicle brake system, wherein the vehicle brake system comprises at least one hydraulic vehicle brake (10), having a brake caliper (12), having a brake piston (16), having a brake piston seal (20) which is assigned to the brake caliper (12) and which acts between the brake caliper (12) and brake piston (16), having brake pads (22), and having a brake disk (24), in which method a hydraulic brake pressure acting on the brake piston (16) is built up in a manner dependent on a braking command. The brake pressure is furthermore held in a manner dependent on the braking command. If the braking command is withdrawn, the hydraulic brake pressure acting on the brake piston (16) is reduced to a hydraulic intermediate pressure, and the hydraulic intermediate pressure is held for a defined second period of time. The hydraulic brake pressure is subsequently reduced.

Abstract: In the case of a hydraulic vehicle brake, having a brake caliper (12), having a brake piston (16), having a receiving bore (14) for the brake piston (16), and having a brake piston seal (32) that acts between the brake caliper (12) and the brake piston (16), the brake piston seal (32) is designed as a composite part, with a composite of a base component (34) and a reinforcement insert (36). The reinforcement insert (36) provides the brake piston seal (32) with a degree of elasticity in an axial direction, whereby, after the brake piston (16) has been displaced in the direction of brake pads (22), the brake piston seal (32) displaces the brake piston (16) in the opposite direction.

Abstract: An electric actuator assembly for a drum brake assembly having a brake drum includes a housing and a gear nut configured for rotation by a motor and provided in the housing. A pin extends longitudinally within the housing and is associated with a first clevis for receiving a first brake shoe. A spindle extends longitudinally within the housing and is aligned with the pin. The spindle has a first threaded connection with a second clevis for receiving a second brake shoe and a second threaded connection with the gear nut. The distance between the first clevis and the second clevis increases in response to rotation of the gear nut to move the brake shoes towards the drake drum. The second clevis is urged towards the first clevis in response to cooling of the brake drum in order to back drive the spindle and gear nut and thereby reduce the distance between the first clevis and second clevis.

Abstract: A brake system is provided for a wheel rotor having a brake pad associated therewith. The brake system includes a housing defining first and second passages. First and second pistons are provided in the respective first and second passages for selectively moving the brake pad into engagement with the wheel rotor. First and second spindles are threadably coupled to the first and second pistons such that the pistons are axially movable relative to the spindles without the spindles rotating. Each spindle includes first threads separated by first cylindrical roots and each piston is coupled to second threads separated by second cylindrical roots.

Abstract: A system for controlling an electric brake for a wheel rotor having a brake pad associated therewith includes a housing defining a passage. An assembly is provided in the passage and includes a spindle rotatable about an axis and a piston aligned with the brake pad and axially movable in response to rotation of the spindle. A planetary gear stage includes a sun gear, a ring gear, and planetary gears. A first motor is coupled to the sun gear. A second motor coupled to the ring gear. A control system is configured to, in response to a detected braking event, rotate the first motor in a first direction to supply torque to the sun gear while the second motor is rotated in a second direction at varying speeds to supply torque to the ring gear such that the piston is cyclically moved towards and away from the brake pad to modulate a braking force on the rotor.

Abstract: An apparatus for a drum brake assembly having a brake drum includes a brake shoe and a pivot lever connected to the brake shoe. The pivot lever has a first condition movable with the brake shoe to apply braking force to the brake drum and a second condition deflected relative to the brake shoe for absorbing brake drum contraction forces.

Abstract: A system for controlling an electric brake for a wheel rotor having a brake pad associated therewith includes a housing defining a passage. An assembly is provided in the passage and includes a spindle rotatable about an axis and a piston aligned with the brake pad and axially movable in response to rotation of the spindle. A planetary gear stage includes a sun gear, a ring gear, and planetary gears. A first motor is coupled to the sun gear. A second motor coupled to the ring gear. A control system is configured to, in response to a detected braking event, rotate the first motor in a first direction to supply torque to the sun gear while the second motor is rotated in a second direction at varying speeds to supply torque to the ring gear such that the piston is cyclically moved towards and away from the brake pad to modulate a braking force on the rotor.

Abstract: An electric brake for a wheel rotor having a brake pad includes a housing with a passage. A piston assembly in the passage includes a spindle and a piston. The spindle is rotatable to cause the piston to move axially relative to the brake pad. A drive assembly includes a motor. A gear train is connected to the motor and the spindle. A coupling mechanism is coupled to the gear train and has a first condition enabling torque transmission from the motor to the spindle to axially move the piston to apply braking force to the brake pad. The coupling mechanism has a second condition disabling torque transmission from the motor to the spindle is prevented which permits the piston to retract and reduce the braking force on the brake pad without stopping or reversing the motor.

Abstract: A brake clip for a disc brake assembly having a brake pad received in an anchor bracket includes a shim configured to be received in the anchor bracket. The shim includes a base leg and opposing upper and lower legs extending from the base leg to define a receiving space. At least one of the upper and lower legs includes a retaining member extending in a first direction. A spring is provided in the receiving space for receiving the brake pad. The spring includes a base and a pair of projections extending from the base. At least one of the projections includes a retaining member that cooperates with the at least one retaining member on the shim to allow for a predetermined amount of relative movement between the shim and the spring in the first direction.

Abstract: 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.

Abstract: A method for controlling vehicle braking of a wheel rotor having a brake pad associated therewith includes moving a piston into engagement with the brake pad by applying hydraulic pressure to the piston. The piston is locked in place against the brake pad with a parking brake. The hydraulic pressure is removed from the piston while the parking brake is locked.

Abstract: 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 extend into and are connected with each piston. A clutch unit is connected to the spindles and includes a motor. The clutch unit has a first condition allowing for rotation of the spindles in response to hydraulic pressure applied to the pistons such that the pistons are axially movable within the passages and relative to the spindles into engagement with the brake pad. The clutch unit has a second condition for rotating the spindles to drive the pistons into the brake pad and apply the parking brake.

Abstract: An electrically actuated parking brake has a single electric motor producing a torque, a first torque limiting device with a first spring force, and a second torque limiting device with a second spring force. The first torque limiting device fully transmits a first portion of the torque to a first spindle until a first clamp force overcomes the first spring force and the second torque limiting device fully transmits a second portion of the torque to a second spindle until a second clamp force overcomes the second spring force. When the first clamp force overcomes the first spring force and the second spring force overcomes the second clamp force, the first portion of the torque that exceeds the first spring force is transmitted to the second spindle by the second torque limiting device.

Abstract: An electric parking brake for a vehicle brake system includes a caliper, a piston, a spindle, an adjuster nut, a ring-like member affixed to the piston, and a biasing member. The piston may be disposed within a cavity of the caliper. The spindle is configured to drive the axial movement of the adjuster nut between a retracted position and an extended position via a threaded engagement wherein the adjuster nut is disposed within the piston. The biasing member may be disposed between the ring-like member and the adjuster nut so that, as the adjuster nut moves from an extended position to a retracted position which corresponds to a control signal, the biasing member urges the piston away from the rotor.

Abstract: A disc brake assembly includes a brake clip having a U-shaped section and at least one extension portion. The U-shaped section has a base leg and opposing upper and lower legs extending from the base leg. The at least one extension portion has an application portion, a transition portion with first and second legs, and a bend connecting the first and second legs. The transition portion extends in a first direction from a side of the U-shaped section. The first and second legs extend in a direction other than the first direction. The bend redirects the application portion from a second direction to a third direction. The second direction is angled from the first direction.

Abstract: An electrically actuated parking brake has a single electric motor producing a torque, a first torque limiting device with a first spring force, and a second torque limiting device with a second spring force. The first torque limiting device fully transmits a first portion of the torque to a first spindle until a first clamp force overcomes the first spring force and the second torque limiting device fully transmits a second portion of the torque to a second spindle until a second clamp force overcomes the second spring force. When the first clamp force overcomes the first spring force and the second spring force overcomes the second clamp force, the first portion of the torque that exceeds the first spring force is transmitted to the second spindle by the second torque limiting device.

Abstract: An electric parking brake for a vehicle brake system includes a caliper, a piston, a spindle, an adjuster nut, a ring-like member affixed to the piston, and a biasing member. The piston may be disposed within a cavity of the caliper. The spindle is configured to drive the axial movement of the adjuster nut between a retracted position and an extended position via a threaded engagement wherein the adjuster nut is disposed within the piston. The biasing member may be disposed between the ring-like member and the adjuster nut so that, as the adjuster nut moves from an extended position to a retracted position which corresponds to a control signal, the biasing member urges the piston away from the rotor.

Abstract: This invention relates to a brake clip for use with a disc brake assembly. The brake clip includes a U-shaped section having a base leg with opposing first and second legs extending from the base leg. An abutment leg extends from at least one of the first and second legs of the U-shaped section. An extension leg extends from the abutment leg. The abutment leg is in contact with an anchor bracket of the disc brake assembly and the extension leg is in contact with a brake pad of the disc brake assembly when the brake clip is disposed therebetween.

Abstract: This invention relates to a brake clip for use with a disc brake assembly. The brake clip includes a U-shaped section having a base leg with opposing first and second legs extending from the base leg. An abutment leg extends from at least one of the first and second legs of the U-shaped section. An extension leg extends from the abutment leg. The abutment leg is in contact with an anchor bracket of the disc brake assembly and the extension leg is in contact with a brake pad of the disc brake assembly when the brake clip is disposed therebetween.