A braking system for a vehicle includes an indicator device provided to reliably indicate a state of a parking brake of the system, while being simple, convenient, and economical. The system includes a body that delimits a service brake pressure chamber and/or a parking brake pressure chamber, a parking brake movable relative to the body, an unlocking part for unlocking the parking brake connected to the parking brake pressure chamber and accessible from outside the body, and a parking brake indicator device. The indicator device is configured to receive a position of the unlocking part via a state pipe and an indicator of supply and/or the venting of the service brake pressure chamber and/or of the parking brake pressure chamber. This information is processed in to detect and indicate an engaged state or a disengaged state of the parking brake.

A brake actuator assembly including a pressure plate presenting an opening, a push rod that is coupled to the pressure plate, a diaphragm that is coupled to the pressure plate, and a retainer that engages the push rod. The push rod has an outer surface and at least one protrusion extending outward from the outer surface. The retainer engages the protrusion such that at least a portion of the diaphragm is positioned between the pressure plate and the retainer.

A brake actuator assembly including a pressure plate presenting an opening, a push rod that is coupled to the pressure plate, a diaphragm that is coupled to the pressure plate, and a retainer that engages the push rod. The push rod has an outer surface and at least one protrusion extending outward from the outer surface. The retainer engages the protrusion such that at least a portion of the diaphragm is positioned between the pressure plate and the retainer.

An emergency brake device for a rail vehicle includes a compressed-air-brake system, wherein a braking process can be initiated by lowering the air pressure in a main air conduit and which includes an exclusively electric connection to a passenger emergency brake.

A spring brake actuator (1) provides a service brake function and a parking brake function and comprises a housing (2) with a housing base (4). A compression spring (14) and a ram assembly (10, 11, 28) with a spring brake piston (28) are provided are provided in the housing (4). The ram assembly separates a spring chamber (12), in which the compression spring (14) is disposed, from a parking chamber (16). The spring brake actuator (1) includes a check valve (50), which is included in the ram assembly to allow an air flow to the parking chamber (16) in case of a compounding condition. The check valve (50) includes a one-way valve, for example a duckbill valve, and a supporting element for securing the one-way valve in the ram assembly.

A spring brake actuator (1) provides a service brake function and a parking brake function and comprises a housing (2) with a housing base (4). A compression spring (14) and a ram assembly (10, 11, 28) with a spring brake piston (28) are provided are provided in the housing (4). The ram assembly separates a spring chamber (12), in which the compression spring (14) is disposed, from a parking chamber (16). The spring brake actuator (1) includes a check valve (50), which is included in the ram assembly to allow an air flow to the parking chamber (16) in case of a compounding condition. The check valve (50) includes a one-way valve, for example a duckbill valve, and a supporting element for securing the one-way valve in the ram assembly.

A compressed-air braking system (DBA*) for a motor vehicle, includes a compressed-air supply device (1) with a compressor (2) and several brake circuits which are connected to the compressed-air supply device (1) via a multi-circuit protection valve (7) and include at least one parking brake circuit with parking brake cylinders (25.1, 25.2). In order to reduce the operating noise of the compressed-air braking system (DBA*) occurring in particular on venting of the parking brake cylinders (25.1, 25.2), it is provided that the parking brake cylinders (25.1, 25.2) can be vented, per wheel or per vehicle axle, alternately either to the surrounding atmosphere or into an additional reservoir (31) via a respective quick-venting valve (29) connected to a connecting line (28) and a changeover valve (30) arranged downstream thereof.

A compressed-air braking system (DBA*) for a motor vehicle, includes a compressed-air supply device (1) with a compressor (2) and several brake circuits which are connected to the compressed-air supply device (1) via a multi-circuit protection valve (7) and include at least one parking brake circuit with parking brake cylinders (25.1, 25.2). In order to reduce the operating noise of the compressed-air braking system (DBA*) occurring in particular on venting of the parking brake cylinders (25.1, 25.2), it is provided that the parking brake cylinders (25.1, 25.2) can be vented, per wheel or per vehicle axle, alternately either to the surrounding atmosphere or into an additional reservoir (31) via a respective quick-venting valve (29) connected to a connecting line (28) and a changeover valve (30) arranged downstream thereof.

A brake system for a vehicle includes a first axle pressure modulator (APM) for service-brake-chambers for a first vehicle-axle, a second axle pressure modulator for spring-brake-cylinders for a second vehicle-axle, the second APM being connected to an electronic-brake-control-unit, which is configured to issue a first electric-control-signal for controlling the first APM and a second electric-control-signal for controlling the second APM, an intelligent foot brake module, which is configured to issue a first pneumatic-control-signal for controlling the first APM and a second pneumatic-control-signal for controlling the second APM, an electronic parking brake controller, which is configured to issue a second pneumatic parking brake signal for controlling the spring-brake-cylinders, and a pressure control valve, which is configured to convert the second pneumatic parking brake signal into a first pneumatic parking brake signal for controlling the first APM.

An electro-pneumatic hand brake system is for a vehicle with spring-loaded brakes. The system includes a pneumatic relay valve, a bistable solenoid valve for controlling the relay valve and a control unit for controlling the bistable solenoid valve. An outlet of the relay valve is connected to ports for the spring-loaded brakes. An inlet of the bistable solenoid valve is provided for connecting to a line carrying ventilation pressure. A self-retaining switching valve with a control input is provided before the inlet of the bistable solenoid valve. The self-retaining switching valve can be moved against the force of a restoring element from a blocking position into a flow-through position when there is sufficient pressure at its control input. An outlet of the self-retaining switching valve is connected to the inlet of the bistable solenoid valve.