Abstract: An apparatus for hydraulic actuation of a hinged cover on a vehicle having a working cylinder such that work spaces within the cylinder are respectively connected, via check valves, to a reversible pressure source. The check valves respectively contain a reciprocal unclosing facility, and the work spaces are connected, via a pilot valve, in parallel to the check valves. Between the one of the work space and one of the check valves, an emergency valve guiding off to the tank is interposed and is shut off during normal operation of the apparatus to allow a safe emergency actuation of the hinged cover.

Abstract: A power steering system is actuated by a controller which includes a Bowden cable having a core and a sheath. The core is connected directly mechanically to a control mechanism and the sheath is connected hydraulically to the control mechanism by a control valve and an operating cylinder. To balance a reaction of the control mechanism on the core and thus undesired steering movements of the power steering system, a brake unit is disposed between the core and the sheath of the Bowden cable to prevent relative movement between the two by means of friction.

Abstract: A power steering system (3) includes a controller (1) and a control mechanism (3), which can be operated by way of a Bowden cable (5) having a core (7) and a sheath (6). The core (7) is connected directly mechanically to the control mechanism (3), and the sheath (6) is connected hydraulically to the control mechanism (3) by way of a control valve (8) and an operating cylinder (9). To prevent oscillations in the closed control circuit of the power steering system, the sheath (6), or the control piston (15) of the control valve (8) connected thereto, is provided with a damping device (18) to dampen the axial movement of the control piston (15). The damping device provides hydraulic damping of the control piston (15).

Abstract: To connect the cylinder pipe (1) of a hydraulic cylinder to a bottom (6), and a cover (8), the bottom (6) and cover (8) have groove-shaped recesses (16, 17), into which are pressed the ends (5, 7) of the cylinder pipe (1) under permanent deformation. To enable pressurization at high operating pressures, the region (25) of the inner end of the non-deformed cylinder pipe (1) is defined as a holding region (18, 19) and has a turned groove (26) which, in the deformed state of the cylinder pipe (1), reaches over the related inner edge (27) of the groove-shaped recesses (16, 17) with respect to the longitudinal stretch of the cylinder pipe (1).

Abstract: A method is indicated of recycling plastic sheet material coated with adhesive and available in chopped form. The method provides for separating the plastic from the adhesive. In a first method step the chopped sheet material (4) is introduced into a solvent bath (1) where the chopped sheet material (4) is moved for a predetermined dispersing time under mechanical action. The mechanical action preferably is exercized by rolling or kneading. In a second method step, the adhesive dispersed in the solvent is separated from the chopped sheet material (4) by mechanical action of forces--preferably by introducing squeezing forces in a conveyor screw.

Abstract: In a position independent locking of a hydraulic cylinder/piston mechanism, a pressure limiting member is provided in the supply pipe for the hydraulic medium, with the pressure limiting member being open during the hydraulic displacement of the piston and is closed during lack of hydraulic pressure. The pressure limiting member opens starting from a specific pressurization of the hydraulic medium as a result of a force generated by means of the piston and is located in a related working chamber.

Abstract: A damping mechanism for decelerating the movement of a piston of a cylinder/piston mechanism includes at least one elastically deformable damping element, which in the installed state is disposed undetachably between two holding regions which are spaced apart in the direction of the piston movement and wherein one holding region communicates with the cylinder and the other holding region communicates with the piston during deceleration.

Abstract: The power steering mechanism for vehicles, in particular motor boats, has a control wheel that is drive-connected to a control via cable that is attached thereto and a lever system connected thereto. The core of the cable is mechanically connected to the lever system whereas the sheath of the cable is attached to the displaceable control member of the control valve. The control valve controls a hydraulic operating cylinder whose power piston also acts on the lever system of the control. To simplify and reduce the size of the arrangement, the operating cylinder and the control valve are built directly together in axial direction, and the core of the cable penetrates the control member of the control valve and is connected to the power piston of the operating cylinder and in this manner is also connected to the lever system of the control.

Abstract: In a servo steering system for motor boats comprising a steering wheel which mechanically acts on the position of a hydraulic control valve, and a rubber cylinder connected to a hydraulic power unit by way of the control valve, the control valve comprises an additional adjustment unit which is connected to an autopilot unit and is controllable by this latter. In this way both normal servo-assisted hand-steering and autopilot steering are made possible in a simple manner.

Abstract: The present invention relates to anthracyclin derivatives of the formula I ##STR1## in which R.sub.1 and R.sub.2 are identical or different and represent the sugar residue Roa (L--rhodosamine) of the formula ##STR2## or the sugar combination Roa--dF.dbd.CinB (dF=2-deoxy-L-fucose; CinB.dbd.L-cinerulose B) of the formula ##STR3## The invention furthermore relates to a process for the preparation of the above compounds of the formula I, and to their use as cytostatic agents.

Abstract: The present invention relates to the micro-organism Streptomyces purpurascens (DSM 2658), its mutants and variants, a process for the preparation of anthracycline derivatives by fermentation of these cultures and to the anthracycline derivatives themselves. The new compounds are distinguished by antibacterial activity and, in addition, they act against various types of tumors.

Abstract: A filling level measuring probe detects the filling level in a container by suppression of an oscillator by contact with a filling material. The oscillator consists of a hollow body 16, which can be connected through a shaft 14 and a screw-in part 12 with a container wall 10 and is set in oscillation with oscillations in the radial direction over a crosspiece 20 mounted in hollow body 16 by means of an electromechanical transducer 26 which is mounted on crosspiece 20. The oscillations are converted by a second electromechanical transducer 28 into an electric signal, of which the amplitude is changed with suppression of the oscillations as a result of contact of the hollow body 16 with the filling material.

Abstract: An automatic dough parting and kneading machine has at least one channel between the parting chamber and the kneading apparatus. Means are provided to periodically and selectively raise the kneading apparatus into at least partial telescopic engagement with the channel. Thereafter, the kneading belt (on which the pieces of dough are carried) is periodically advanced.

Abstract: A method for isolating a chemically unstable carbapenem antibiotic from a fermentation solution by adsorbing the antibiotic on an ion exchanger resin at the maximum of product formation, thus converting it to a stabilized form, and then separating the resin from the fermentation solution.

Abstract: A chromophoric cephalosporin composition having the formula ##STR1## is utilized for the detection of .beta.-lactamases. Detection of .beta.-lactomases can be carried out by diluting the compound in solution or by a test strip carrier.

Abstract: What are disclosed are cephalosporins of the formula ##STR1## processes for the manufacture of said cephalosporins, preparations containing same for the detection of .beta.-lactamases, a process for making said preparations, and the use of said cephalosporins for the detection of .beta.-lactamases.

Abstract: A novel process for obtaining cephalosporin C and the salts and derivatives thereof from culture filtrates or culture solutions is provided which comprises drying the culture filtrate or culture solution, dissolving it in an optionally water-containing solvent different from water, and(a) forming a derivative of the amino group of cephalosporin C, and isolating it in the form of a free acid or a salt, or(b) precipitating the cephalosporin C or the scarcely soluble salt thereof directly.