An expansion device for drum brakes, which is floatingly and approximately centrally arranged between two substantially symmetrical brake shoes, the expansion device including at least two gear levers articulated to each other and each supported on a brake shoe, at least one of the gear levers of the expansion lock being coupled to an actuating element of an actuator system such that the brake shoes carry out an even, translationally directed expanding movement, which is converted by a gearing, in the direction of the brake drum. At least one of the gear levers of the spreader lock has a spring element integrated into it that can be elastically reversibly deformed by a brake application force about a defined elasticity S of at least 1 mm in a defined manner.

A strain wave-type gearbox comprises: a flex spline component; an outer circular spline component; and a wave generator component, wherein the wave generator component is configured for adjustment of at least one dimension of the wave generator component, to cause engagement and disengagement of the flex spline component and the outer circular spline component. A drive arrangement for manipulating a vehicle control surface comprises: a first drive; a second drive; an output member for connecting to the vehicle control surface; first engaging means for selectively engaging and disengaging the first drive and the output member; and second engaging means for selectively engaging and disengaging the second drive and the output member, wherein the first engaging means comprises a strain wave-type gearbox.

The invention relates to a railway braking system comprising a connection device (7) having a lower part (14), an upper part (15) distinct from the lower part, two main posts (16) connecting the lower part to the upper part, and an attachment portion (18) forming a single anchor zone via which the system is configured to be mechanically secured to a railway vehicle, the system further comprising a brake linkage having levers (12) mounted with the ability to rotate about the two main posts, and a service and/or parking brake configured to act on the braking member as a result of actuation of the levers, with the connection device comprising at least one additional post (17) that also connects the lower part to the upper part and is positioned closer to the attachment portion than are the two main posts.

An electromechanical brake actuator (10) for a brake of a vehicle (100) has a brake tappet (14) that can be moved substantially translationally for transmitting a compressive force (F) in the direction of a brake pad (6, 6), a drive member (16) that generates a drive movement (A) and a coupling gear (18) that operatively connects the drive member (16) to the brake tappet (14). The coupling gear (18) converts the drive movement (A) of the drive member (16) into an adjustment movement (B) of the brake tappet (14). The coupling gear (18) has a coupling member (38) in contact with the brake tappet (14) that moves along a cam path (40, 60) and converts the substantially uniform drive movement into an adjustment movement (B) of the brake tappet (14) at, in portions, a non-uniform adjustment speed (B).

A park brake actuator, comprising: a housing; a piston comprising a piston rod and a piston head, the piston being provided in the housing; a spring, wherein the spring is arranged between the piston head and one side of the housing; an opening in the housing in which the piston rod is movably inserted; a fluid chamber being provided between the piston head and a side of the housing, wherein fluid is insertable into a fluid space, wherein the piston comprises at least one first guiding element which is adapted to guide the piston rod in the opening, and; at least one first seal between the piston rod and the opening.