A magnetorheological braking device with a fixed mount and with two braking components. One of the two braking components is non-rotatably affixed to the mount and the two braking components are continuously rotatable relative to one another. A first braking component extends in the axial direction. The second braking component has a hollow shell part that extends around the first braking component. A peripheral gap is filled with a magnetorheological medium. The first braking component has an electric coil and a core made from a magnetically conductive material. Magnetic field concentrators on the core and/or magnetic field concentrators on the shell part protrude into the gap, which results in a peripheral gap with a variable gap height. A magnetic field of the electric coil runs through the core and the magnetic field concentrators and through the gap into a wall of the shell part.

A magnetorheological braking device has two braking components that are continuously rotatable relative to one another. A first braking component extends in the axial direction and the second braking component includes a hollow casing extending around the first braking component. A peripheral gap is filled with a magnetorheological medium. The first braking component has an electric coil and a magnetically conductive core which extends in the axial direction. A star contour with magnetic field concentrators on the core and/or on the shell part project into the gap, which results in a peripheral gap region with a variable gap height. The electric coil is wound around the core such that a magnetic field runs through the core and the magnetic field concentrators and through the gap into a wall of the casing. A star contour is formed by a stack of star plates.

A handle includes a torque limiting device. The torque limiting device includes a plurality of driven members and a plurality of driving members. The plurality of driving members is configured to drive the plurality of driven members in a first direction to turn a valve. In response to turning the valve, the plurality of driving members disengages from the plurality of driven members upon reaching a torque threshold. Feedback is provided when the torque limiting device reaches the torque threshold.

A shaft-hub connection includes a shaft with a feather key groove, a hollow shaft, and a feather key. The hollow shaft has an inner groove, and the feather key is plugged into the feather key groove and radially protrudes into the inner groove of the hollow shaft. The feather key groove is only partially filled by the feather key, and a sealing part is received in the feather key groove.

An electromechanical brake for a motor vehicle. The electromechanical brake includes an electric motor, which rotationally drives a mechanical adjustment unit arranged in a brake caliper housing, so that, for applying a braking force, a brake actuator is displaceable in an axial direction of the brake caliper housing. A motor housing arranged radially on the brake caliper housing accommodates the electric motor, and a control device housing of a control device controlling the electric motor is arranged on the motor housing. The motor housing is formed from the brake caliper housing and the control device housing, and the brake caliper housing is manufactured by a primary-shaping or reshaping step. A motor housing edge formed by the brake caliper housing, between the brake caliper housing and the control device housing, is formed in such a way that a radial height of the motor housing edge increases in the axial direction.

A magnetorheological fluid includes: a first metal magnetic particle having an average particle diameter of 5 m or more; a second metal magnetic particle having an average particle diameter of 500 nm or less; and an ionic liquid having a cationic group and an anionic group, in which the cationic group is one or more selected from the group including a quaternary ammonium ion, an imidazolium ion, a pyridinium ion, and a phosphonium ion, and the anionic group is one or more selected from the group including a tetrafluoroborate ion, a hexafluorophosphate ion, a trispentafluoroethyl trifluorophosphate ion, and a bis(trifluoromethanesulfonyl)amide ion.

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.