Abstract: A variable capacity pump includes a control ring moveable within a pump chamber to alter the volumetric capacity of the pump. First and second control chambers individually receive pressurized fluid to create forces to bias the control ring in a predetermined direction. A return spring urges the control ring toward a maximum volumetric capacity pump position. The control ring connects and disconnects the second control chamber from a source of pressurized fluid based on a position of the control ring. Forces from the control chambers and the spring act in combination with one another or against one another and against the spring force to establish first and second equilibrium pressures based on a pressurized or vented condition of the second control chamber.

Abstract: A variable capacity pump includes a control ring moveable within a pump chamber to alter the volumetric capacity of the pump. First and second control chambers individually receive pressurized fluid to create forces to bias the control ring in a predetermined direction. A return spring urges the control ring toward a maximum volumetric capacity pump position. The control ring connects and disconnects the second control chamber from a source of pressurized fluid based on a position of the control ring. Forces from the control chambers and the spring act in combination with one another or against one another and against the spring force to establish first and second equilibrium pressures based on a pressurized or vented condition of the second control chamber.

Abstract: A pump, in particular a sliding-vane pump, a roller cell pump, or a gear pump includes a rotating assembly, with, amongst other things, a rotor with radially-sliding vanes, rollers or gears and a drive shaft is provided. The rotor or a gearwheel is connected to the drive shaft by a toothing on the drive shaft and on the rotor or gearwheel for rotational drive.

Abstract: A pump, in particular a sliding-vane pump, a roller cell pump, or a gear pump includes a rotating assembly, with, amongst other things, a rotor with radially-sliding vanes, rollers or gears and a drive shaft is provided. The rotor or a gearwheel is connected to the drive shaft by a toothing on the drive shaft and on the rotor gearwheel for rotational drive.

Abstract: A process for the production of wear-resistant, coated surfaces includes the use of at least two electrodes connected to a voltages source which are mounted in, or border, a reaction space through which an electrolyte flows in which the surface to be coated is located. The process is distinguished by the fact that the direction of the flow of the electrolyte is selectively reversed at least once during the coating process to enable better control of the formation of the oxide layer.

Abstract: The invention relates to a pump, especially a power-assisted steering pump, comprising a current regulating valve, the current regulating valve comprising a hydraulic resistance, such as a main throttle and a regulating piston, whereby the main throttle can optionally be a regulating pin and an annular orifice.

Abstract: A pump is proposed, in particular a vane pump, for a liquid or gaseous medium, which can be driven with the help of a motor, in particular an electric motor, and which comprises a rotor (15) that can be coupled to a drive shaft (29) of the motor and is arranged in an operating chamber and at least one pressure plate (25) that closes the operating chamber (11) in the axial direction and on its lateral face (27) facing away from the rotor (15) is connected to a pressure chamber (23), and also a coupling element (47; 47′) which surrounds part of the drive shaft (29), cooperates with at least one seal and contributes to sealing off the pressure chamber (23) with respect to the motor, the drive shaft (29) extending through a through opening (35) in the pressure plate (25). The pump (1) is characterized in that the coupling element (47; 47′) has a sleeve-like section (49) which engages in the through opening (35) in the pressure plate (25).

Abstract: A compressor, in particular for a vehicle air conditioning system, with a housing, which contains a device for conveying a compressed medium driven by a drive shaft, designed as an axial piston machine and having at least one piston reciprocating in a cylinder block and a take-up plate connected to the piston working in combination with a swash plate rotating around a rotational axis, whereby the swash plate is connected to the drive shaft by a carrier and whereby the take-up plate encompasses a support device working in combination with a non-rotating thrust bearing.

Abstract: The invention relates to a hydraulic delivery device with a displacement unit which delivers a medium from a suction connection under output pressure to a pressure connection, connectable with a consumer, and under consumer pressure, and a regulating device for setting and/or limiting a volume flow delivered by the delivery device.

Abstract: A valve assembly for a hydraulic discharge device and including a piston displaceable in a bore of a housing of the discharge device against a biasing force and having an outer surface, which sealingly engages an inner wall of the housing bore and blocks a channel opening into the bore so that the piston functions as a slide valve for this channel, the valve assembly further including a valve seat which, together with the piston, forms a seated valve.

Abstract: A compressor, in particular for a vehicle air conditioning system, with a housing, which contains a device for conveying a compressed medium driven by a drive shaft, designed as an axial piston machine and having at least one piston reciprocating in a cylinder block and a take-up plate connected to the piston working in combination with a swash plate rotating around a rotational axis, whereby the swash plate is connected to the drive shaft by a carrier and whereby the take-up plate encompasses a support device working in combination with a non-rotating thrust bearing.

Abstract: The invention relates to a hydraulic delivery device with a displacement unit which delivers a medium from a suction connection under output pressure to a pressure connection, connectable with a consumer, and under consumer pressure, and a regulating device for setting and/or limiting a volume flow delivered by the delivery device.

Abstract: A suction-throttled pump, comprising at least one displacement body for the delivery of a medium and movable in a delivery chamber, into which opens at least one inflow channel extending between the delivery chamber and a suction chamber, and comprising a suction control valve, the pump being characterised in that the suction control valve (33; 33′; 33″) co-operates directly with the inflow channel (25; 25′) and is arranged at the end thereof facing the suction chamber (27).

Abstract: A compressor for an air-conditioning system of a motor vehicle is proposed, which has a controllable compression medium feed mechanism powered by a drive shaft and which, for example, is powered by the combustion engine of the motor vehicle by a belt driven by a drive shaft, where the belt is coupled with the drive shaft of the compressor. The compressor is characterized by the drive wheel (29) having a belt pulley body (31) engaged with the belt (33) and coupled via an elastic coupling element (35) with the drive shaft (7), and by the drive shaft (7) being equipped with a torque limiting mechanism (predetermined fracture point (65)). In the case of another version, it is envisaged that the support mechanism (127) contains a projection (137) protruding from the take-up plate (11) and preferentially forming a single piece with this, as well as a supporting element (139).

Abstract: A hydraulic machine is proposed, with a drive shaft rotating around a center axis, a drive wheel at a first end of the drive shaft, via which forces, which are characterized by a force component running largely vertical to the center axis, are led to the drive shaft, a second, opposite end of the drive shaft with a pump unit, which is characterized by a first rotating pump element connected to the drive shaft and a fixed pump element which works in conjunction with the first pump element, and with a bearing unit for the drive shaft, the hydraulic machine is characterized by the fact that the bearing unit (33) is offset to the line drawn by the middle axis (13) when the drive shaft (27) is not under load, where the bearing unit (33) is positioned in the direction of the force components relative to the center axis (13).