Abstract: The invention relates to a supply device for the supply of pressure fluid into at least one vehicle brake, into a pressure fluid reservoir or into a pressure fluid accumulator, with a pressure fluid inlet and a pressure fluid outlet as well as with the following features: a piston is movably arranged in an accommodating member and has at least two hydraulically active diameters for the supply in the direction of the pressure fluid outlet, at least one non-return valve is used for the ventilation of a working chamber into which the piston is immersed. It is the essence of the invention that the piston has a multi-part design and comprises at least two synchronously movable partial pistons, with the first partial piston exhibiting the first hydraulically active diameter, and the second partial piston exhibiting the second hydraulically active diameter.

Abstract: In order to produce a compact hydraulic unit for use in an electrohydraulic braking system, the invention discloses that a first accommodating bore for a first feeding device of a pump is passed through between valve accommodating bores of a first and second valve row, and in that second and third accommodating bores for the accommodation of second and third feeding devices of the pump ae passed through between valve accommodating bores; of a third valve row.

Abstract: The present invention relates to a hydraulic unit whose ventilation system includes a pressure compensating channel (1) that extends transversely to the motor- and pump accommodating bore (2, 11) from the second housing surface (A2) through the motor accommodating bore (2) in the direction of a third housing surface (A3) in the accommodating member (3) positioned diametrically to the second housing surface (A2).

Abstract: In order to produce a compact hydraulic unit for use in an electrohydraulic braking system, the invention discloses that a first accommodating bore for a first feeding device of a pump is passed through between valve accommodating bores of a first and second valve row, and in that second and third accommodating bores for the accommodation of second and third feeding devices of the pump ae passed through between valve accommodating bores; of a third valve row.

Abstract: The invention relates to a supply device for the supply of pressure fluid into at least one vehicle brake, into a pressure fluid reservoir or into a pressure fluid accumulator, with a pressure fluid inlet and a pressure fluid outlet as well as with the following features: a piston is movably arranged in an accommodating member and has at least two hydraulically active diameters for the supply in the direction of the pressure fluid outlet, at least one non-return valve is used for the ventilation of a working chamber into which the piston is immersed. It is the essence of the invention that the piston has a multi-part design and comprises at least two synchronously movable partial pistons with the first partial piston exhibiting the first hydraulically active diameter, and the second partial piston exhibiting the second hydraulically active diameter.

Abstract: The present invention relates to a hydraulic unit whose ventilation system includes a pressure compensating channel that extends transversely to the motor and pump accommodating bore from the second housing surface through the motor accommodating bore in the direction of a third housing surface in the accommodating member positioned diametrically to the second housing surface

Abstract: The present invention related to a piston pump, in particular for controllable brake systems such as ABS or ESP, wherein a working chamber of the pump in front of a piston is delimited by a pressure valve, and a resetting spring with its one end is supported on a valve seat carrier of the pressure valve and with its other end resets said piston into its bottom dead center position. An object is to render the assembly of the mass-produced pumps as inexpensive and simple as possible. To achieve this object, the present invention discloses that the resetting spring be adapted to be attached directly or indirectly to the valve seat carrier in addition.

Abstract: A pressure fluid accumulator with a housing having its interior subdivided by a media-separating element into two chambers, the first chamber being filled with a gas and the second chamber being filled with a liquid, and wherein in a hydraulic port a bottom valve is provided which permits filling the second chamber with liquid and prevents complete evacuation of the second chamber, and the valve's closure member is operable by the media-separating element. In order to prevent, especially at low temperatures and high viscosity of the pressure fluid, damage of the media-separating element caused by a high differential pressure, a device is provided between the media-separating element and the bottom valve.

Abstract: The present invention relates to a motor-pump aggregate with a motor and a piston pump, more particularly for electronically controlled brake systems of motor vehicles, wherein pistons of the pump are drivable by way of an eccentric that is connected to a shaft of the motor and are connected by means of a coupling ring, and wherein the motor has a holding plate. According to the present invention, a projection is provided on the holding plate and extends until into the range of motion of the coupling ring. This provides a stop for the coupling ring, on the one hand, and an improved outlet for leakage fluid of the pump, on the other hand.

Abstract: The return pumps of brake systems with a precharging device are greatly stressed by the precharging pressure and subjected to premature wear. Significant leakage occurs in the long run which will damage the pump motors in the worst case. This is prevented by controlling the pressure fluid supply from the precharging source to the suction side of the return pump as a function of the pressure gradient in this connecting line. To this end, an electromagnetically operated on-off valve (23) with a hydraulically insertable throttle is used.

Abstract: The present invention relates to a brake pressure control device, more particularly, for anti-lock pressure control and for automatic brake intervention for the purpose of traction slip control and/or driving dynamics control in automotive vehicle brake systems, including accommodating bores for pressure modulation valves arranged in a housing, pressure sensor connecting ports which lead into the housing and into which there are inserted pressure sensors that sense the pressure in a housing-side pressure fluid conduit respectively connected to a brake pressure generator. The pressure sensor connecting port either opens into the pressure fluid conduit between two accommodating bores that are directed into the housing, or is part of the pressure modulation valve.

Abstract: The present invention relates to a motor-pump aggregate with a motor and a piston pump , more particularly for electronically controlled brake systems of motor vehicles, wherein pistons of the pump are drivable by way of an eccentric that is connected to a shaft of the motor and are connected by means of a coupling ring, and wherein the motor has a holding plate. According to the present invention, a projection is provided on the holding plate and extends until into the range of motion of the coupling ring. This provides a stop for the coupling ring, on the one hand, and an improved outlet for leakage fluid of the pump, on the other hand.

Abstract: The present invention relates to a hydraulic aggregate for a slip-controlled brake system which includes noise damping chambers integrated in a pump bore, wherein there is a hydraulic connection between the brake pressure generator ports and the noise damping chambers by means of pressure fluid channels that open radially or tangentially into the pump bore and are connected to the valve accommodating bores of the first valve row of an accommodating member in which the inlet valves are received.

Abstract: The present invention relates to a piston pump, which is in particular appropriate for the pressure fluid delivery in electronically controlled brake systems, including a housing, a suction valve, a pressure valve, and a pump piston that is designed as a stepped piston having a large-diameter portion and a small-diameter portion. According to the present invention, the stepped piston at its large-diameter portion is guided in a pump cartridge. Preferably, the pressure valve is designed additionally at the cartridge in a radial direction relative to the direction of movement of the stepped piston.

Abstract: The present invention discloses a hydraulic fluid accumulator comprising a housing having an interior subdivided into three chambers, with the first chamber being filled with a gas and separated from the second chamber by a first media separation element, the second chamber being filled with a fluid and separated by a second media separation element from the third chamber that is also filled with a fluid and connected to a hydraulic port. To safeguard an effective separation of media within the hydraulic fluid accumulator and, thus, a significant increase in its functional safety, the present invention arranges for the second media separation element to be embodied by a metal piston delimiting a chamber that can be vented in the housing.

Abstract: A pressure valve, particularly for a reciprocating piston pump for conveying pressure fluid in slip-controlled hydraulic brake systems, wherein the pressure valve has a valve seat body and a valve cover body with a pre-tensioning element and a valve element installed in the space formed between the valve seat body and the cover body, which is particularly economical to manufacture, easy to install and particularly safe because of the valve seat body and the valve cover body being manufactured by non-cutting process.

Abstract: The invention relates to a motor-driven pump unit, in particular for antilock systems of motor vehicles, with an electric motor that is arranged on one side of a pump unit and an electronic unit that is arranged on another side of the pump unit and fastened thereto. The main aspect of the invention is that means are provided for an axially movable attachment and contacting of carbon brushes in connection with an axial installation of the unit. In this way, the individual components of the unit can be assembled axially in a simple manner and at low cost. In addition, the unit requires very little space.

Abstract: The present invention relates to a motor-and-pump assembly including an electric motor and a piston pump, in particular for slip-controlled brake systems of automotive vehicles, wherein pistons of the pump are adapted to be driven by way of an eccentric, and the drive shaft of the electric motor and a support axle of the piston pump are separately designed, and wherein a three-ring bearing furnished with an eccentric intermediate ring is arranged on the support axle. According to the present invention, at least one counterbalance weight is provided in the proximity of the eccentric for the purpose of noise reduction and enhanced truth of running of the assembly.

Abstract: The present invention relates to a brake pressure control device, more particularly, for anti-lock pressure control and for automatic brake intervention for the purpose of traction slip control and/or driving dynamics control in automotive vehicle brake systems, including accommodating bores (3) for pressure modulation valves (4) arranged in a housing (2), pressure sensor connecting ports (1) which lead into the housing (3) and into which there are inserted pressure sensors (7) that sense the pressure in a housing-side pressure fluid conduit (5) respectively connected to a brake pressure generator. The pressure sensor connecting port (1) either opens into the pressure fluid conduit (5) between two accommodating bores (3) that are directed into the housing (2), or is part of the pressure modulation valve (4).

Abstract: The present invention relates to a brake pressure control device, more particularly, for anti-lock pressure control and for automatic brake intervention for the purpose of traction slip control and/or driving dynamics control in automotive vehicle brake systems, including accommodating bores for pressure modulation valves arranged in a housing, pressure sensor connecting ports which lead into the housing and into which there are inserted pressure sensors that sense the pressure in a housing-side pressure fluid conduit respectively connected to a brake pressure generator. The pressure sensor connecting port either opens into the pressure fluid conduit between two accommodating bores that are directed into the housing, or is part of the pressure modulation valve.