Abstract: A spring brake actuator has a service brake with a service brake housing and a service brake working chamber located in the service brake housing. The service brake working chamber is confined by a diaphragm. A service brake piston movable along an actuator-longitudinal axis and abuts the diaphragm, which applies a brake force onto the service brake piston. A spring between the service brake piston and the service brake housing pushes the service brake piston against the direction of the brake force. A modulator valve unit communicates with the service brake working chamber and is configured to regulate the inlet and outlet of fluid into and out of the service brake working chamber. The modulator valve unit is integrated into the spring brake actuator and includes a controllable inlet valve communicating with the service brake working chamber and a controllable outlet valve communicating with the service brake working chamber.

Abstract: Pneumatic control valve of a vehicle air brake system, having at least one first valve system which is arranged in a housing upper part with a first valve piston which can be actuated via an elastomer spring element, and having a second valve system which is arranged in a housing lower part with a coaxially arranged second valve piston which can be actuated by the first valve system and with a second annular plate valve. The elastomer spring element and the first valve piston are configured in one piece as a composite component. In the region of a radial sealing lip of the spring element, the material of the elastomer spring element engages radially and axially in a positively locking manner around a radially outer section of the first valve piston.

Abstract: Pneumatic control valve of a compressed-air brake system of a vehicle, having at least one first valve system which is arranged in an upper housing and has a first valve piston which interacts with a first valve and can be actuated manually or by means of an actuator via a spring element by means of a plunger piston, having a second valve system which is arranged in a lower housing with a coaxially arranged second valve piston which can be actuated pneumatically and/or mechanically by the first valve system and with a second annular plate valve. The first valve piston is guided via the plunger piston in the cylindrical guide in the housing upper part.

Abstract: Pneumatic control valve of a vehicle air brake system, having at least one first valve system which is arranged in a housing upper part with a first valve piston which can be actuated via an elastomer spring element, and having a second valve system which is arranged in a housing lower part with a coaxially arranged second valve piston which can be actuated by the first valve system and with a second annular plate valve. The elastomer spring element and the first valve piston are configured in one piece as a composite component. In the region of a radial sealing lip of the spring element, the material of the elastomer spring element engages radially and axially in a positively locking manner around a radially outer section of the first valve piston.

Abstract: Pneumatic control valve of a compressed-air brake system of a vehicle, having at least one first valve system which is arranged in an upper housing and has a first valve piston which interacts with a first valve and can be actuated manually or by means of an actuator via a spring element by means of a plunger piston, having a second valve system which is arranged in a lower housing with a coaxially arranged second valve piston which can be actuated pneumatically and/or mechanically by the first valve system and with a second annular plate valve, The first valve piston is guided via the plunger piston in the cylindrical guide in the housing upper part.