Abstract: A screw spindle pump arrangement includes a low-pressure connection, a high-pressure connection, a drive spindle, and at least one idling spindle. A feed section of the idling spindles is divided into two feeding segments that are driven either in series or in parallel to form a screw spindle pump arrangement with two operating modes. Two tap connections are connected by a connecting line which is provided in a center area of the feed section. The connecting line is blockable, the low-pressure side tap connection is connectable to the high-pressure connection, and the high-pressure side tap connection can be connected to the low-pressure connection. A series circuit is created by the open connecting line, corresponding to a screw spindle pump. With the connecting line blocked, and the simultaneous pressure medium flow paths indicated above, the screw spindle pump arrangement is operable as a parallel circuit.

Abstract: A transfer line with devices for conveying work pieces along the central bases, lateral bases set up along the sides of the central bases on which the processing units are mounted so as to be capable of displacement, and supply devices for the processing stations. In order to improve access to the transfer line and simplify component units, the following features are proposed: a) the supply devices along the direction of travel of the work pieces are arranged exclusively within or in the region of and/or above the central bases; b) the supply devices are connected to each processing station via short detachable connecting pieces; c) shut-off devices are provided at least in the main lines for hydraulics, lubrication, pneumatics etc.; and d) at least one control block with valves is provided between the shut-off devices and the processing station.