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 apparatus for a vehicle includes a screw bar positioned inside a caliper body, and rotated by receiving power of a driving motor; a nut unit including a nut which surrounds the screw bar, and a nut holder which is threadedly coupled with the screw bar, is movable on the nut and is moved toward a pad member by rotation of the screw bar; and a piston unit surrounding the nut unit, and pressing the pad member, wherein the nut holder is brought into contact with the piston unit while being moved toward the pad member, and moves the nut such that the nut pushes the piston unit.

Brake apparatus for a motor vehicle with a restoring apparatus, comprising a brake support body, a brake lining, a restoring apparatus for the brake lining, and a wear compensation means, the restoring apparatus being connected via the wear compensation means to the brake lining, the restoring apparatus having a lever arm which comprises a spring section, a supporting bearing and a lever bearing, the lever bearing being arranged between the spring section and the supporting bearing.

An electromagnetic brake device presses a pressing plate against a brake rotor along an axis via a friction material by the electromagnetic force of an electromagnetic actuator. The electromagnetic brake device includes a support member that is disposed on the opposite side of the pressing plate to the brake rotor and that is supported by a housing so as to be displaceable along the axis and non-rotatable around the axis, and a shaft member that transmits a force in the direction along the axis between the pressing plate and the support member. An electromagnetic coil and an armature of the electromagnetic actuator are spaced apart from the pressing plate between the pressing plate and the support member, the electromagnetic coil is supported by the housing, and the armature is supported by the support member.

Provided is an electric braking device wherein a friction member is pressed, via a piston driven by an electric motor, against a rotary member that rotates integrally with a vehicle wheel, thus generating a braking force on the vehicle wheel. The electric braking device is provided with: a controller for controlling the electric motor; a rotation angle sensor for detecting a rotation angle of the electric motor; and a return mechanism for applying a return force to a piston in a direction away from the rotary member. Furthermore, the controller executes a proper/improper determination to determine whether the return mechanism is operating properly on the basis of a change in the rotation angle after conduction of electricity to the electric motor is stopped.

A brake caliper for a vehicle disc brake including a pair of brake pads, and brake a disc positioned in between the brake pads is provided. The brake caliper includes a thrust piece that is configured to move at least one of the brake pads relative to the brake disc, an adjuster unit in threaded engagement with the thrust piece, and a spring unit operatively coupled to the adjuster unit and the thrust piece. The spring unit has a latching element and the adjuster unit has a corresponding latching interface, wherein the latching element is arranged to engage the latching interface when the adjuster unit is in threaded engagement with the thrust piece, and the spring unit further has a mounting element in engagement with the thrust piece to provide a resistance against a rotational movement the adjuster unit relative to the thrust piece.

A parking brake apparatus may include: a driving part; a driving gear rotatably connected to the driving part; a gear shaft engaged with the driving gear so as to be rotated by the driving gear; a pair of pistons disposed on both sides of the gear shaft and connected to brake shoes, respectively; a pair of nuts disposed in the respective pistons, and screwed to the gear shaft; an elastic member installed between the piston and the nut so as to pressure the nut toward the brake shoe; a holder installed in the piston so as to support the elastic member; and a constraint ring installed in the piston so as to constrain the holder.

Provided is a disc brake including: a piston, which has a bottomed cylindrical shape, and is configured to press inner and outer brake pads against a disc rotor; a nut member (thrust member) configured to thrust the piston through rotation of a spindle driven by an electric motor; a rotation stopping member configured to restrict rotation of the nut member relative to the piston; a flat surface portion, which is formed on an inner side of the piston, and is configured to restrict rotation of the rotation stopping member and stop the rotation stopping member through engagement; and a fixing member configured to restrict movement of the rotation stopping member in an axial direction relative to the piston. This configuration allows easy manufacture of the nut member.

A disc brake (1) for a utility vehicle includes a brake disc (19), a brake caliper (2) which surrounds the brake disc (19), an application-side brake lining (3), a rim-side brake lining (3a) and an application-side application device (4) which is arranged in the brake caliper (2). The application device (4) has at least one adjustment spindle (5) and a pressure plate (6) that is arranged axially between the adjustment spindle (5) and the application-side brake lining (3). A plain bearing element (7) is arranged between the pressure plate (6) and the adjustment spindle (4).

A brake assembly comprises: a brake piston configured to be movable for a brake apply or release and having an inner wall forming a piston cavity, wherein a groove is formed on the inner wall of the brake piston; a linearly movable structure positioned within the piston cavity of the brake piston and configured to be linearly movable within the piston cavity; and a resilient material, wherein a part of the resilient material is located within the groove formed on the inner wall of the brake piston and the other part of the resilient material is disposed on an outer surface of the linearly movable structure so that the resilient material is engageable with a surface of the groove formed on the inner wall of the brake piston to move the brake piston by restoring force of the resilient material in response to linear movement of the linearly movable structure.