Abstract: The invention relates to a storage device for material boards (2), having a rail-bound main track (6) and at least one main vehicle (4), which can travel on the main track, and also a plurality of transfer paths (7) that lead to board deposit points (9), and at least one satellite vehicle (5), which can travel on the transfer paths and is able to move at least one material board (2), wherein a holding area (8) is provided on the main vehicle (4) for at least one satellite vehicle (5), wherein the main vehicle (4) has an electrical power supply, for example via a sliding contact, and a drive means comprising a main vehicle electric motor (12), and wherein the satellite vehicle (5) likewise has a drive means comprising a satellite vehicle electric motor (22).

Abstract: A hydraulic brake system for automotive vehicles comprises a master cylinder (4) with at least two working chambers (3,5) and comprising at least two brake circuits. A first brake circuit is in constant hydraulic communication with a first working chamber (3) of the master cylinder (4), while a second brake circuit is connected to the second working chamber (5) of the master cylinder (4). A pressure control valve (1) is inserted into the connection between the working chamber (5) and the second brake circuit, the valve enabling to take influence on the pressure in the second brake circuit in a predeterminable fashion. The pressure control valve (1) is switchable by a slip monitoring electronics (62) so that braking pressure control in the second brake circuit will take place exclusively in the event of failure of the brake slip control apparatus.