Parking and maneuvering valve for trailers having a spring-loaded parking brake

Brake system for trailers, comprising:

• a parking and maneuvering valve, which includes a release unit, a parking unit and an emergency brake unit, wherein a supply tank and a spring-loaded parking brake are attached to the parking and maneuvering valve,
• supply and braking attachments, which are couplable to a towing vehicle brake system, wherein the supply attachment is connected to the release unit, and the brake attachment controls a service brake cylinder,
• and a first actuating unit, which includes a first actuating member, assigned to the parking unit, wherein
• a) the supply tank is attached to the emergency brake unit, and the emergency brake unit has an emergency brake valve, wherein to fill the supply tank, the supply attachment is connectable via the release unit and the emergency brake valve to the supply tank;
• b) the spring-loaded parking brake is attached to the parking unit, and the parking unit is connected to the emergency brake unit;
• c) a second actuating unit includes a second actuating member, assigned to the release unit;
• and wherein
• d) as a function of the switching position of the release unit and the parking unit and as a function of the brake system of the trailer, the spring-loaded parking brake is uncoupled or coupled, pressurized or bled, in accordance with one of the drive, maneuvering or parking states.