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 system and method for controlling a hydraulic fracturing pumping system is described herein. The method can include stopping an engine coupled to a hydraulic fracturing pumping system including at least one pump by supplying pressure from an accumulator to a hydraulic braking system including a brake. The method can also include starting the engine coupled to the hydraulic fracturing pumping system and releasing the brake.

A disc brake for a vehicle, having a first and a second brake lining (2a), and a brake disc (1) which is arranged between them, and a brake calliper which engages over the brake disc (1) with a brake calliper housing (6), in which a brake application device is arranged, wherein the brake application device comprises a pressure piece (3) which can be applied against the first brake lining (2a), wherein a boot (5) is provided for protecting the interior of the brake calliper housing against contaminants, wherein the boot (5) is fastened by way of a first end region (5a) to the brake calliper housing (6) and by way of a second end region (5b) to a sheet metal arrangement (7) consisting of a sheet metal plate (8) and a sheet metal ring (9) which is arranged coaxially with respect thereto and is connected in an integrally joined manner to said sheet metal plate (8), wherein the sheet metal plate (8) is arranged between an end side of the pressure piece (3) and the first brake lining (2a), wherein the sheet metal ring (9) is arranged between the boot (5) and the brake lining (2a) for protecting the boot (5) against heat radiation which is generated by way of braking operations on the brake linings (2a, 2b) and the brake disc (1), and wherein the sheet metal ring (9) has at least one cut-out (11) for reducing its flexural stiffness.

A disc brake including: a piston; a cylinder including a bore portion, which movably accommodates the piston, and a step portion formed on an opening end side of the bore portion; and a piston boot arranged between a tip side of the piston and a small diameter step portion of the cylinder. The piston boot includes: a large diameter annular fitting portion containing an annular metal member so as to be fitted to the small diameter step portion; a bellows portion, which extends from the large diameter fitting portion, is increased in its diameter from the large diameter fitting portion to an outer peripheral side, and is also deformed and extended from the large diameter fitting portion toward an inner peripheral side; and a small diameter fitting portion formed at an end portion of the bellows portion so as to fit to an outer periphery of the piston.

A method of applying an automated parking brake of a motor vehicle includes at least two phases. In a first preceding phase, no clamping force is produced by the parking brake. In a second following phase, a clamping force is produced by the parking brake via a controllable parking brake actuator configured to produce the clamping force. The method further includes detecting a transition from the first phase to the second phase based on a temporal progression of a specific parameter of a control of the parking brake actuator. A control unit is configured to perform according to the method, and a parking brake is configured to perform according to the method.

A disc brake includes a pair of end-side connector parts that connect a pair of cylinder parts across over a disc rotor, and an intermediate connector part that is installed between the end-side connector parts and that connects the pair of cylinder parts across over the disc rotor and brake pads. The brake pads are provided with protrusion segments that are formed at positions that are outer end sides in a rotor radial direction and that protrude in directions separated from middle portions of the brake pads in a rotor rotational direction, and the end-side connector parts are provided with pad engaging faces on which inner regions in the rotor radial direction of the protrusion segments are oppositely disposed and which are formed of the same member as a caliper main body.

The invention relates to a brake actuator for an aircraft hydraulic brake, which is intended to be added into one of the cavities of a brake ring, the actuator comprising a liner (1) designed to be housed sealingly in the cavity of the ring, a piston (3) mounted to slide sealingly in the liner along an axis of sliding (X) so as to apply a braking force on friction pads when a fluid is introduced under pressure into the cavity, and having a determined operational travel, a wear compensation device (10) which defines a position to which the piston retreats into the liner by means of a mobile stop (11) that can be moved forward by the piston as a braking force is applied, and an elastic return member (16) returning the piston towards the retracted position bearing against the mobile stop. According to the invention, the mobile stop is reduced to a friction member rubbing against the liner, such that one of the faces of the friction member serves as a stop defining the retracted position of the piston, and the other of the faces serves as a support for the elastic return member, the elastic member having, when compressed, a sufficient increase in force in order to be able to push back the mobile stop in the event that the piston is not in contact with the friction pads while its operational travel is already exhausted.

A hydraulic vehicle brake has a piston which acts upon a friction element and is displaceable by a rotationally drivable spindle/nut arrangement into an actuating position. A spindle of the spindle/nut arrangement is secured against rotation and movable by the spindle nut either into abutment against the piston or away from the piston. The spindle nut comprises a first part, which at least close to one end thereof is configured for screw-type engagement with the spindle, and a second part, configured for rotationally driving the first part and connected to the first part by a rotationally fixed connection. The first part at an other end thereof is provided with a support surface for the rotatable, axial mounting of the spindle/nut arrangement and the second part at the other end extends into the first part.

A brake actuator assembly may comprise a housing, a piston disposed in the housing and slidably engaged therewith, a resilient member disposed within the housing and coupled to the piston, and a deformable member disposed within the housing a coupled to the piston, wherein each of the deformable member and the resilient member are disposed radially between a piston rod of the piston and the housing.

The invention relates to a restoring device (1) for restoring a brake pad of a motor vehicle disc brake, and to a motor vehicle disc brake which comprises a restoring device of this type.

The restoring device (1) comprises a wear compensation means (2) and a tension arrangement (7) for generating a restoring force, having a bearing region (10) for support on a brake carrier of the motor vehicle disc brake, and a coupling section (8), the bearing region (10) defining a bearing plane (AE) by way of a bearing contact (11) which, when the tension arrangement (7) bears against the brake carrier, comes into contact with the latter.

Furthermore, the restoring device (1) comprises a coupling device (4), by way of which the wear compensation means and the tension arrangement (7) are coupled to one another or can be coupled to one another in such a way that, in the coupled state of the wear compensation means (2) and the tension arrangement (7), it permits a perpendicular orientation of the wear compensation axis (VA) with respect to the bearing plane (AE) and an orientation of the wear compensation axis (VA) which differs from the perpendicular orientation and is inclined within a pivot angle range (a) towards the bearing plane (AE) in every extent direction of the bearing plane (AE).