Abstract: The invention relates to a hydrostatic, slow-speed rotary cylinder engine comprising a power part (1) which acts as an output, said power part comprising a central, stationary stator (4), a rotary cylinder (6) which is used as a rotor and a shaft (2) which is mounted in a central manner on both sides of the roller bearings (10, 11) which are arranged directly adjacent to the power part (1). Supply and discharge of tooth chambers comprising the working fluid is controlled by means of a disk-shaped rotational valve (3) which is mounted in a continuously centered manner in relation to the shaft (2) and the stator (4). A toothed wheel drive is arranged between a shaft external toothing (14) and an internal toothing (17) of a stationary internal toothed ring (28; 92) as a synchronous drive for the rotational valve (3). The toothed wheel drive is subsequently arranged in the leakage oil region of the engine and is formed by a planetary gear (80) or, preferably, by an eccentric gear (30).

Abstract: A displacement pump with variable volume flow having a casing; a chamber with an inlet opening on a low pressure side and an outlet opening on a high pressure side for a fluid; an internal rotor capable of rotation about a rotational axis (DI); a ring having a central ring axis (DA) surrounding the internal rotor and forming together with the ring, at least one delivery cell in which fluid is delivered from a low pressure side to a high pressure side of the pump; and an adjusting device which, during an adjusting movement, rolls off on the casing without slipping is provided. The internal rotor is fixed to the adjusting device and rotatble about the rotational axis (DI), and the position of the rotational axis (DI) relative to the central ring axis (DA) of the ring is adjusted by the adjusting movement of the adjusting device.

Abstract: The device for adjusting the phase position of a shaft, especially a camshaft that can be rotated by a drive shaft, more particularly a crankshaft, by a transmission device with at least one transmission wheel, is configured as a rotary piston machine according to the orbit principle. The inventive device adjusts the rotary position of the transmission wheel in relation to the shaft. The rotary pistol machine includes a stator with inner teeth, an annular rotary piston with outer teeth that engage with the inner teeth of the stator, a driven part that can be rotated by the rotary piston and a valve that can be rotated by the rotary piston and a valve device. In order to control the movement of the rotary piston, the valve device enables rotating partial areas of the working area between the stator and the rotary piston to be joined to a fluid supply device at high or low pressure. The fluid supply device includes a control mechanism, a phase position detector and at least one control valve.

Abstract: An infinitely variable ring gear pump comprising a stationary casing, an internal rotor (3) in said casing rotatably supported and driven by means of a shaft (2) and an external rotor (4) likewise rotatably supported, meshing with the internal rotor (3), the difference in the number of teeth of the gear ring running set comprising the internal rotor (3) and the external rotor (4) being equal to unity, having a tooth shape in which a plurality of expanding and contracting displacement cells (7) each sealed off from the other materializes due to tooth tip contact and kidney-shaped low and high-pressure ports (8, 9) fixedly arranged laterally in the region of the displacement cells (7) being provided in the casing, the ports (8, 9) being separated from each other by webs (10, 11) and the angular position of the eccentric axis (eccentricity 17) of the ring gear running set (5) being variable relative to the casing.

Abstract: A hydrostatic bearing mounts a rotatable control part of a planetary rotation machine according to the orbital principle. Pockets are arranged at least in one sliding surface. Each pocket is surrounded by a bearing gap and fed with bearing fluid by a supply line under pressure. The bearing gap is small, so that there is only a small flow of bearing fluid from the pocket. The supply line, the feed with bearing fluid and the bearing gap are designed so that the pressure required for a rigid bearing can be built up in the pocket. Using the working fluid at half the high pressure in the bearing pocket results in a bearing which has minimal leakage and frictional losses and can be realized at low cost, so that the efficiency of the planetary rotation machine as a whole is increased.

Abstract: The invention relates to a valve train of an internal combustion engine having hydraulic actuator means for controlling a valve control means as a function of engine speed and having a pump driven by the engine for supplying the actuator means with working fluid. The pump is configured as a suction-controlled ring-gear pump having a sealing web extending over a plurality of pockets, and featuring a delivery characteristic as a function of speed which is adapted to the working fluid requirement of said actuator means. In addition, an internal gear pump is provided, particularly useful for such a valve train.

Abstract: A suction controlled gear ring pump effects a continuous decrease of the vacuum occurring in the feed cells of the pump at higher rotational speeds due to the long movement path of the feed cells from the end of the suction region to the beginning of the discharge opening and the thereby occurring diminution of the feed cells. In order to prevent squeeze oil when working at a lower rotating speed, the feed cells positioned successively in the feed direction are connected between the teeth respectively with the neighboring feed cells by overflow channels extending through the gear teeth, check valves in said overflow channels preventing a flow against the feed direction.

Abstract: A hydrostatic rotary piston machine contains a displacement part acting as a driven part and an adjacent control part which serves to supply and removed operating fluid to and from the displacement part. The displacement part has a rigid housing with a first inner tooth system which interacts with a rotatable, eccentrically arranged rotary piston having a first outer tooth system. The rotary piston has a second inner tooth system which intermeshes with a second outer tooth system on a centrally mounted shaft which passes through the control part and is mounted at both ends. The difference is the number of teeth between the first inner tooth system and first outer tooth system is 1. The second inner and outer tooth system differ by at least two in the number of teeth, the outer tooth system always being that with the smaller number of teeth. A rotary commutator of the control part is coupled to the rotary piston via an arc gear having a transmission ratio of 1:1.

Abstract: A hydrostatic gear ring machine includes a hollow gear with an internal toothing and a central gear provided with an external toothing and rotated about a stationary axis whereas the hollow gear is rotated about the axis rotated about the axis of the central gear. The hollow gear has on its outer periphery an external toothing which is concentrical with its internal toothing and which is in mesh with the internal toothing provided on a housing. A distributor valve is provided, which includes a first control element and a second control element each having control openings closable by the other control element.

Abstract: A hydrostatic gear ring pump or motor has a housing with an inner hollow and an inlet side and an outlet side, a hollow gear arranged in the housing and provided with between eight and sixteen teeth, and a driven pinion provided with teeth having by one tooth less than the hollow gear and engaging with the hollow gear so as to form a region of deepest engagement and a region which is opposite to the latter. The teeth heads of the pinion sliding over the teeth of the hollow gear in the opposite region whereas the driving or driven teeth flanks of the pinion abut against the teeth of the hollow gear in the region of deepest engagement so as to provide sealing between the suction side and pressure side. The teeth are formed so that the teeth heads of said pinion are freely received into the teeth gaps of the hollow gear and the teeth of the pinion has a shape determined by rolling of the pinion over the hollow gear.

Abstract: A gear ring pump has a housing with an inner hollow and a suction and pressure side, a hollow gear arranged in the housing and provided with between eight and sixteen teeth, and a driven pinion provided with teeth having by one tooth less than the hollow gear and engaging with the hollow gear so as to form a region of deepest engagement and a region which is opposite to the latter. The teeth heads of the pinion slide over the teeth of the hollow gear in the opposite region whereas the driving teeth flanks of the pinion abut against the teeth of the hollow gear in the region of deepest engagement so as to provide sealing between the suction side and pressure side. The teeth are formed so that the teeth heads of the pinion are freely received into the teeth gaps of the hollow gear and the teeth of the pinion has a shape determined by rolling of the pinion over the hollow gear. The teeth of the hollow gear have an approximately trapezoidal shape with convexly curved flanks and heads.

Abstract: The axial piston machine, such as an engine or a pump, comprises a radial hydrostatic bearing for the drive shaft in the form of an oil gap between a conical shaft portion and a corresponding conical boring in a bearing block. The gap has a plurality of bearing pockets normally supplied with high-pressure oil via throttling means communicating with the high-pressure oil. An auxiliary axial hydrostatic bearing in the form of a bearing gap defined between the face of the bearing block near the tapering end of the bearing body and a radial extension of the drive shaft is supplied with an auxiliary low-pressure oil having an approximately constant pressure. A self-adjustable pressure chamber is provided in a plane parallel to the axial hydrostatic bearing gap and is defined by a collar supported on the drive shaft opposite the first radial extension and communicating with the axial bearing gap via a conduit.

Abstract: A high-pressure rotary fluid-displacing machine is described which is suitable for use as a motor or pump. It comprises a housing, an internally toothed annular gear, an externally toothed pinion arranged eccentrically within said annular gear and intermeshing therewith, an engagement-free crescent-shaped gap being left between the addendum circles of the pinion and of the annular gear, respectively, on the side thereof opposite the contact point of the pitch circle of the pinion with the pitch circle of the annular gear, a shaft bearing the pinion and being adapted for transmitting torque, and a gap-filling member in the gap having an inner and an outer curved surface, the inner surface being sealingly contacted by the addendum surfaces of the teeth of the pinion, and the outer surface being sealingly contacted by the addendum surfaces of the teeth of the annular gear.

Abstract: A hydrostatic gear machine is described which comprises a pair of gear wheels meshing with one another, one of the gear wheels being an internally toothed annular gear wheel and the other an externally toothed pinion, the tooth profile of at least one of said wheels being at least substantially trochoidal; the tooth profile of a first one of the two wheels being defined as being obtained by rolling the first wheel with meshing on the other wheel. The teeth of at least one of said wheels bear the thus defined profile only on a limited zone having a length just sufficient for the ratio of the angles of rotation of the two wheels to be constant throughout rotation of the wheels, and have their profile set back, outside the said limited zone, by a sufficient distance to eliminate contact, outside the limited zone, with the teeth of the other gear wheel.

Abstract: A method for grinding the tooth flanks of a roughed-out, annular, internally-toothed gear wheel wherein the pitch circle of the internally-toothed gear wheel is rotated about or rolled off a fixed circle having a diameter equal to the pitch circle of an externally-toothed pinion, adapted to mesh with the finished internally-toothed gear wheel; and, simultaneously with the rotation of the gear wheel, a grinding wheel is rotated on an axis parallel to the plane of the gear wheel, is reciprocated through the interior of the gear wheel along an axis parallel to the axes of the pitch circle of the gear wheel and the fixed circle and maintained a fixed distance from the axis of the fixed circle, except for normal infeed, and has a circumferentially-disposed grinding surface whose cross-sectional profile is equivalent to the profile of at least a part of the profile of at least one tooth of the pinion; the ratio of the diameter of the fixed circle to the diameter of the pitch circle of the gear wheel being an aliqua