A system comprises a slave cylinder for a motorcycle. The slave cylinder may include a rod with a height which is hydraulically adjustable by a hydraulic pressure adjuster. A motorcycle slave cylinder is also provided which includes a rod having a height. The motorcycle slave cylinder also includes a hydraulic pressure adjuster. The hydraulic pressure adjuster hydraulically adjusts the height of the rod above the motorcycle slave cylinder.

The present invention addresses the problem of providing a disc brake device for which sliding at the boundary surface between a piston and a piston seal is suppressed, and dragging is reduced. The present invention is provided with a cylinder, a piston housed in the cylinder, an inner brake pad opposing a disc rotor, an inner circumferential groove formed in a cylinder inner circumference, and a piston seal that is provided in the inner circumferential groove and contacts the piston. The inner circumferential groove is provided with a wall, a wall on the opposite side from the wall, a bottom wall connecting the wall and the wall, and a curved surface expanding the inner circumferential groove at the wall. The bottom wall is formed such that the distance to the piston gradually increases from the wall toward the wall. The curved surface is provided with a curvature starting point on the side closer to the piston seal and a curvature endpoint on the opposite side from the curvature starting point with the curved surface therebetween, and the curvature endpoint is positioned farther outside than the cylinder inner circumference.

A slack adjuster and systems, components, and methods can comprise a base enclosure, a pair of floating piston assemblies, and a pair of sensing piston assemblies. The base enclosure can define an internal chamber that extends along a longitudinal axis of the base enclosure and an inlet channel that extends along a transverse axis of the base enclosure perpendicular to the longitudinal axis. The internal chamber can have a first chamber portion, a second chamber portion, and a center chamber portion that intersects the inlet channel. The floating piston assemblies can be respectively provided in the first and second chamber portions. Likewise, the sensing piston assemblies can be respectively provided in association with the floating piston assemblies.

The present application relates to crushable body in the form of a corrugated thin walled tube e.g. for use in a piston assembly for engaging two selectively engageable parts. The piston assembly has a housing defining a piston cylinder and a piston. The assembly also has a piston stroke limiter. The piston stroke limiter is configured to limit the length of a return stroke of the piston from an extended stroke position and a retracted stroke position. A crushable body in the form of a corrugated thin walled tube acts between the piston and the piston stroke limiter and is arranged to reduce in axial length when a length of an extended stroke exceeds a length of a retraction stroke to maintain the length of the return stroke.

A brake system that includes a brake caliper comprising an inboard side and an outboard side, the inboard side of the brake caliper includes one or more brake pistons and the outboard side of the brake caliper comprises one or more brake pistons, and a brake pad comprising a first pad section and a second pad section. During a service brake apply, both of the first pad section and the second pad section are moved against a braking surface to create a clamping force. During a parking brake apply, only one of the first pad section and the second pad section is moved against the braking surface to create a clamping force. The first pad section comprises a friction material having a coefficient of friction that is different than a coefficient of friction of the second pad section.

A longitudinal end of the nut has: at least one blocking face forming a means for blocking a rotation of the nut along a longitudinal axis of the nut, and at least one transmission face forming a means for transmitting a force directed along the axis. The blocking face or at least one of the blocking faces and the transmission face or at least one of the transmission faces have at least one common edge, and the blocking face or at least one of the blocking faces is concave.

A disk brake piston having a spindle nut, and a load bearing column within a piston body. The load bearing column includes a footing configured to push against a brake pad and a core extending from the metal footing and slidably located within the piston body, wherein the spindle nut is configured to contact and push the metal core which pushes the metal footing which pushes on the brake pad.

The invention discloses a friction simulating device, comprising: a first driving shaft, a first driving gear, a second driving gear, a second driving shaft, a plurality of friction plates and a driving mechanism. The first driving gear is coaxially fixedly connected to the first driving shaft. The second driving gear is located on a radial outer side of the first driving gear and is provided coaxially with the first driving gear. The second driving shaft is coaxially fixedly connected to the second driving gear. The plurality of friction plates being provided subsequently between the first driving gear and the second driving gear in a direction of an axis of the first driving gear, wherein some of the friction plates are axially movably connected to the first driving gear in a circumferential direction, and the other friction plates are axially movably connected to the second driving gear in the circumferential direction. The friction simulating device is able to simulate the friction applied to the wheels of the vehicle by the ground.

A braking device for an in-wheel motor may include: a stator; a rotor configured to rotate when power is applied to the stator; a disk interlocked with the rotor; a bracket coupled to the stator and a knuckle; and a caliper mounted on the bracket, and configured to press the disk.

A piston housing may comprise: a main annular ring defining a main bore; a torque takeout annular ring defining a torque takeout bore; a torque takeout arm extending from the main annular ring to the torque takeout annular ring and defining an aperture therethrough; and a structural rib disposed within the aperture and extending from the main annular ring to the torque takeout annular ring.