A locking device of an electromechanically-operated brake caliper for a disc brake, comprising a ratchet comprising a rotating element having at least one first cam and one first follower pushed elastically against said rotating element, configured to act in conjunction with said at least one first cam to allow the rotation of the rotating element in a first direction of rotation, and to prevent the rotation of the rotating element in a second direction of rotation, opposite to said first direction of rotation; a selector element sliding between a first selector element position and a second selector element position, said selector element being adapted to operate said first follower so that, in said first selector element position, said selector element keeps said first follower in a disengaged position away from the rotating element in which the application of a parking braking action is prevented, and so that, in said second selector element position, the selector element keeps said first follower in an engaged position in contact with said rotating element in which a parking braking action can be applied; said selector element having a second cam and said first follower having a first follower opening forming a second follower, said second cam being configured to act in conjunction with said second follower to operate said first follower between said engaged position and said disengaged position.

A parking brake system including a motor; a rotary to linear stage mechanism in communication with the motor; and a torque locking mechanism in communication with the motor. The torque locking mechanism includes a rotor; a core; and locking members. During a parking brake apply the motor is adapted to rotate the rotor and move the rotary to linear stage mechanism so that at least one brake pad or at least one brake shoe is moved against a surface to generate a clamp force. After the clamp force is generated and the motor ceases to rotate the rotor, the core and the locking members are magnetically attracted and the locking members move towards the core as a result of the magnetic attraction so that the generated clamp force is maintained after the motor ceases to rotate the rotor.

A rotary drive device includes a housing element, a drive shaft and a driven shaft, both rotatably mounted in the housing element, a transmission device that transmits torque from the drive shaft to the driven shaft, and a braking device configured to counteract rotation of the drive shaft. The braking device includes a drive shaft input element, a braking element connected to the housing element for conjoint rotation, and a coupling element adjustable with respect to the input element. A braking force exerted by the braking device is greater when the coupling element is located in a first position than when located in a second position, and the coupling element assigned to the driven shaft so that adjustment from the first position to the second position is triggered by exceeding a threshold value of the difference in torque between the drive shaft and the driven shaft.

A disc brake including a brake caliper and a brake actuation mechanism having an amplification mechanism for introducing a clamping force, an adjustment mechanism for compensating a lining wear having a torque clutch, a thrust element for transmitting the clamping force onto the brake disc, wherein the thrust element includes an adjustment spindle, and a return mechanism, wherein the amplification mechanism, the adjustment mechanism, the thrust element and the return mechanism are mounted in a functional interacting manner in the brake caliper by way of a rod. The disc brake is further provided with at least one device, which is configured to exert a defined resistant torque on the rotation of the adjustment spindle.

A rail vehicle (100) has a brake system containing a brake actuator (120) and a brake unit (200). The brake actuator (120) receives a brake command (cmdp) and produces a resulting electric brake-force signal (BF). The brake unit (200) contains first and second pressing members (211) and a rotatable member (110) being mechanically linked to at least one wheel (105) of the rail vehicle (100). When receiving the electric brake-force signal (BF), the brake unit (200) causes the first and second pressing members (211) to apply a braking force to the rotatable member (110). A gear assembly (220) in the brake unit (200) operates mechanically on the first and second pressing members (211). A stepper motor (230), in turn, acts on the gear assembly (120) in response to the electric brake-force signal (BF), thus causing the first and second pressing members (211) to move towards or away from the rotatable member (110) and attain a specified position interrelationship. Based on a position signal (P) indicating an angular position of the stepper motor's (230) power transmission shaft, the brake unit (200) determines if the specified position interrelationship has been attained; and if so, it stops producing the electric brake-force signal (BF) to allow a self-locking mechanism to lock the first and second pressing members (211).

An electromechanical actuator assembly (EMA) for use with a reclinable passenger seat. The EMA includes a housing, an electric motor, and an epicyclic gearbox including first and second ring gears. In the event of power loss, the second ring gear can be decoupled from the first ring gear to permit relative rotation, for instance to manually return the reclined seat to upright, by a mechanical override mechanism including first and second spring-loaded shoot bolts coupled to the first ring gear, a displaceable plate engaging one end of the first and second spring-loaded shoot bolts, and a manual release pin coupled to the displaceable plate. In use, the manual release pin is moveable axially to a position in which the displaceable plate displaces toward the first ring gear to decouple the first and second ring gears.