Abstract: In a goods presentation arrangement with a base part (15) that can be placed on the ground by means of legs (14) and features a lifting device (16) with a lifting bottom (33) that can be raised with the aid of lifting means and carries the goods and also features a control device (40) that is assigned to the lifting device (16) and serves for controlling the lifting means, the control device (40) forms part of an exchangeable plug-in module (31) that can be inserted into a receptacle shaft (30) on the base part (15) and is arranged above the legs (14).

Abstract: A machine tool is suggested, which has a headstock (111) and at least one tool changer (120). The tool changer (120) moves production tools (116) between a magazine position and a working position, at least one fluid power drive cylinder (1) being associated with it as a drive unit (123). On the drive cylinder (1) a locking device (52) is provided, which when a working pressure of the drive piston (6) drops below a predetermined value produces a mechanical locking action of the drive cylinder piston in relation to the housing. To release the mechanical locking, a setting force due to the working pressure must be overcome.

Abstract: A machine tool which comprises a headstock (111) and at least one tool changer (120). The tool changer (120) shifts the production tools (116) between a magazine position and a working position, a drive unit (123) being provided for it in the form of at least one fluid power drive cylinder (1), wherein a piston is arranged for axial motion and for whose terminal fluid damping a damping device is provided. The drive cylinder (1) provided with a setting device, by means of which the terminal position damping may be switched over between at least two preset values.

Abstract: The invention provides a valve arrangement with a pressure control valve placed on a pressure line extending between a source of fluid under pressure and a pressure system in which a constant pressure is to be maintained. The pressure control valve is able to be operated in response to a pressure sensor which is preferably in the form of a venturi element. This pressure sensor is arranged in the pressure line is placed downstream from the pressure control valve and is connected with at least one control port of a pressure switching valve arrangement subject to switching hysteresis, for the pressure control valve. The pressure control valve arrangement is operated by the pressue measured at the position of the pressure sensor. In order to amplify this signal there is the downstream pressure control valve. Owing to overlapfree switch made possible by the hysteresis long venting cycles are prevented and the number of switching operations reduced.