The invention relates to a railway braking system (1) comprising a first pneumatic distribution device (51) formed by a first distributor provided with a single inlet opening (54a,b) connected to a source for supplying pneumatic pressure mediums (73) and with a single outlet opening (55a,b) connected to a parking brake chamber (25) in order to optionally supply a parking brake (7) with a second pneumatic pressure medium so as to place said brake in either of inoperative and operative configurations, and a second pneumatic distribution device (61) formed by a second distributor provided with a single inlet opening (64a,b) connected to said supply source and with a single outlet opening (65a,b) connected to a service pressure chamber (13) in order to supply a service brake (6) with a third pneumatic pressure medium of which the pressure value is predetermined, so as to apply a predetermined braking force when said parking brake is in the operative configuration thereof.

Disclosed is a rail braking system including a detection and storage device designed to receive first information representing the position of a device for locking a service brake piston, to receive second information representing the supply of a service brake pressure chamber with a pneumatic pressure agent, to deduce information representing the application of a parking brake from the first and second information, and to store the deduced information; as a result of which the information representing the application of the parking brake is kept even if the service brake pressure chamber is no longer supplied with the pneumatic pressure agent.

The present disclosure relates to an engagement structure of a push rod guide and a push rod guide cover of a brake chamber for a vehicle, in which a pair of semi-circular, hingedly connected, half members in a shape of a plate are assembled at a side surface of an axial direction of the push rod into a shape of a disk, a push rod opening is formed at the center of the disk to guide a movement of the push rod, a protrusion projecting upwards is provided at a central part of the push rod guide, forming a step in a radial direction of the push rod guide, and a receiving groove corresponding to the step is formed on an inner circumferential surface of the push rod guide cover and is connected to the step.

The present invention discloses a spring clutch comprising a coil assembly, a rotor assembly and a pulley assembly. The coil assembly comprises a coil housing, an encapsulated coil and a shell, the encapsulated coil is in the coil housing. The rotor assembly comprises a shaft, a rotor and a sleeve, the sleeve is on the shaft, the shaft is in the rotor, the shaft is in the coil housing. The pulley assembly comprises an armature, leaf springs, a brake plate and a pulley, one side of the leaf spring is pressed with armature and the another side is pressed with pulley, the brake plate is outside of the armature and covered some area of the armature, the pulley is on the sleeve. The brake plate has magnet pieces inside. A spring clutch in accordance with the present invention the brake plate has magnet pieces inside to make the armature has magnetic force to catch up with the brake plate to enable the clutch has strong friction force to reduce the stop time.

A towable crash-attenuating vehicle is shown having a frame; at least two axles coupled to the frame, each of the axles having wheels attached thereto; a ballast coupled to the frame; deflection shields coupled to the right and left sides of the frame, wherein the deflection shields cover the frame and a majority of the wheels on each side of the vehicle; a tow connection coupled to the front of the frame; an impact attenuator coupled to the rear of the frame; wherein the vehicle is provided with a brake system, and wherein the vehicle is provided with an mechanism for locking and unlocking the brake system.

A rod boot (24) seals a rod opening (20), through which a piston rod of a piston of a pneumatic actuator is guided from a retained position to an extended position. The rod boot is connected to the rod opening (20) and the piston rod (18). A mantle (30) of the rod boot (24) has a first section (34) and a second section (36) opposite from the first section (34). The first section (34) is connected to the rod opening (20) and the second section (36) is connected to a mounting section (38) of the piston rod (18). The second section (36) is inverted inwardly (40) relative to the first section (34), and the longitudinal dimensions of the first section (34) and second section (36) vary relative to each other as a function of a relative position of the first section (34) to the second section (36).

The present disclosure relates to a double-lip seal of a pneumatic spring brake chamber for a vehicle, the double-lip seal has sealing performance between an inner circumferential surface of a through-hole of an adaptor housing and an outer circumferential surface of an actuator rod to prevent degradation in sealing performance of the lip seal, thereby maintaining constant sealing performance and preventing fluid leakage.

A spring brake chamber includes a first case, a second case, and a coupling case. The first case includes an open end, a closed end, and an open end portion. The open end portion of the first case includes a tapered outer positioning portion having a diameter that increases toward the open end. The coupling case couples the first case and the second case. The coupling case includes an open end closer to the first case and an open end portion. The open end portion of the coupling case includes a tapered inner positioning portion having a diameter that decreases toward the open end. The first case is positioned relative to the coupling case by attaching the outer positioning portion to an outer side of the inner positioning portion.

A brake system for a motor vehicle has at least a first wheel brake and at least a second wheel brake. A first inlet valve is fluidically connected, on the one hand, to the first wheel brake, and, on the other hand, to a brake pressure source, and a second inlet valve is fluidically connected, on the one hand, to the second wheel brake, and, on the other hand, to the brake pressure source. In this case, a switching valve is provided, which fluidically connects the one fluid outlet of the second inlet valve in a first switching position to the second wheel brake and in a second switching position to the first wheel brake.

A spring brake actuator is for braking a wheel of a vehicle and has a push rod assembly having a base located in a service brake chamber and a push rod extending from a service brake chamber. Pneumatic activation of the spring brake actuator causes the push rod to further extend out of the service brake chamber to thereby engage a wheel brake with a wheel of the vehicle. Pneumatic deactivation of the spring brake actuator causes the push rod to retract back into the service brake chamber to thereby disengage the wheel brake from the wheel of the vehicle. The push rod extends between a first end portion that is fixed to the base and an opposite, second end portion that is removably coupled to the first end portion so that the second end portion is manually attachable and detachable from the push rod assembly.