Abstract: Object: Device comprising an electromagnet (1) and an actuating element (2) which is operated by said electromagnet and may be, for example, a valve or a clutch, wherein said components are connected to one another by means of threads (4) and (5), with protection of functional spaces in the components or of elastomeric seals against damage and adverse effects on functioning by particles from the threads. Solution: The electromagnet-side thread (4) and actuating element-side thread (5) are axially adjacent in both directions of chambers (6) and (7) which are closed off on in each case the side which is averted from the threads by overlapping cylinder surfaces (11) and (12) on one side and also by further overlapping cylinder surfaces (13) and (14) on the other side. Application: Actuating elements which are operated by an electromagnet.

Abstract: A reciprocating-piston pump with plain bearing traversed by flow. The reciprocating-piston pump is driven by an electromagnet to have a bearing of the piston in a cylinder, which bearing is protected against local overheating and from which bearing decomposition and reaction products and any wear products generated are discharged. For this purpose, elongate helical depressions are provided in one of two bearing surfaces in a bearing gap between the piston and the cylinder, which depressions are traversed entirely or partially by a flow of the liquid which is delivered by the piston acting in interaction with other components of the reciprocating-piston pump for the delivery rate of the reciprocating-piston pump. Reciprocating-piston pumps of the described type can be used as dosing pumps and as delivery pumps in fuel-operated standstill heaters, auxiliary heaters and exhaust-gas purification systems in vehicles.

Abstract: The invention relates to a reciprocating piston pump having a magnet drive and a first displacement chamber and a second displacement chamber, which are separated from each other by a piston, wherein both displacement chambers are connected to each other by a fluid-conducting channel. An overflow valve is arranged in the channel and allows a preferred flow from the first displacement chamber to the second displacement chamber, wherein an additional return valve is arranged either in a transition region between an inlet and the first displacement chamber or in a transition region between the second displacement chamber and an outlet, an armature of the magnet drive being firmly connected to the piston.

Abstract: Device which is operated by an electromagnet and has an encapsulated threaded connection Summary Object: Device comprising an electromagnet (1) and an actuating element (2) which is operated by said electromagnet and may be, for example, a valve or a clutch, wherein said components are connected to one another by means of threads (4) and (5), with protection of functional spaces in the components or of elastomeric seals against damage and adverse effects on functioning by particles from the threads. Solution: The electromagnet-side thread (4) and actuating element-side thread (5) are axially adjacent in both directions of chambers (6) and (7) which are closed off on in each case the side which is averted from the threads by overlapping cylinder surfaces (11) and (12) on one side and also by further overlapping cylinder surfaces (13) and (14) on the other side. Application: Actuating elements which are operated by an electromagnet.

Abstract: A switchable pressure limiting valve with an electromagnet (1) and with a device (2) for opening and closing a passage for the fluid stream. The opening of the valve is determined by the balance of forces at the tappet (3) upon which the pressure force of the fluid at the P-connection (4), the pressure force of the fluid at the T-connection (13) and the forces of two springs (5) and (6) act. The force of the spring (6) is varied by means of the position of the armature of the electromagnet. When the pressure force at the P-connection (4) outweighs the sum of the other forces, the valve opens. The above-mentioned device for opening and closing is composed of a diaphragm (7) and of a sealing seat (12), and this diaphragm is tension-mounted sealingly between the magnetic pole (10) and the housing (21).

Abstract: A proportionally acting solenoid with a plastics encapsulation having a fastening flange which is integrally formed thereon and contains shaped elements which permit installation of the solenoid onto the housing by axial pressing in, rotation and rotary latching, the shaped elements, in interaction with metallic springs and shaped elements of the housing, holding the solenoid on a housing axially and against rotation, and the springs being tensioned upon rotation of the housing during the installation, and the seal which seals the radial gap between the solenoid and the housing being coordinated, by means of the configuration thereof, with a small axial installation force.

Abstract: Electrohydraulic pilot control means (1) for a hydraulic device which can be a proportional directional valve, an adjusting pump or an adjusting motor, which pilot control means contains two proportionally acting pressure control valves (3) and is provided with a control block (2) which accommodates the hydraulic valve parts (4) in holes and to which the associated proportional magnets are flange-connected, wherein the proportional magnets have a common electrical plug connection (5) and wherein the two proportional magnets (3) are joined to form an assembly by being encapsulated with plastic, the said assembly being fastened to the control block (2) and, in this case, being precisely oriented relative to the valve components (4), which are accommodated in the control block, by means of positioning aids which act perpendicular to the movement direction of armatures.

Abstract: A pressure-regulating valve having an electrical control unit mutually connected by a first plug connector. The electrical control unit controls the pressure-regulating valve using a regulated current signal and also renders possible the connection to at least one additional device. The electrical control unit includes two additional plug connectors. Electrical energy is supplied to the electrical control unit by way of a second plug connector and a signal-carrying connection is produced, by a data bus, to a higher-priority controller or to a set-point generator. A third plug connector connects the electrical control unit to one or several bus-compatible electrical devices, or connects the electrical control unit to an additional pressure-regulating valve without a dedicated electrical control unit. The system can be used in electro-hydraulic feedforward controllers of direction-control valves, variable hydraulic pumps and variable hydraulic motors, and in vehicular work machines.

Abstract: A proportionally acting solenoid with a plastics encapsulation having a fastening flange which is integrally formed thereon and contains shaped elements which permit installation of the solenoid onto the housing by axial pressing in, rotation and rotary latching, the shaped elements, in interaction with metallic springs and shaped elements of the housing, holding the solenoid on a housing axially and against rotation, and the springs being tensioned upon rotation of the housing during the installation, and the seal which seals the radial gap between the solenoid and the housing being coordinated, by means of the configuration thereof, with a small axial installation force.

Abstract: A metering pump enables simple fluid metering, has an extended service life, and is of compact construction. The metering pump includes a piston rod in operative connection with a control body which has a circumferential sealing zone, in that the internal circumference of the sealing cylinder radially surrounds the sealing zone. On the piston rod side, a compensating zone, which is at a greater radial distance from the sealing cylinder than the sealing zone, adjoins the sealing zone at least in portions, and in that the control body, after passing beyond the control edge in the actuation direction of the actuator, at least largely severs the fluid connection.

Abstract: The invention relates to a reciprocating piston pump for delivering a liquid. The pump includes a solenoid with an actuator and an outlet port. A check valve with a seat body is assigned to the outlet port for keeping a return flow of the liquid out of the reciprocating piston pump. The seat body bears an impact damping face at a front face facing away from a valve seat of the check valve, and the valve seat of the check valve and the impact damping face are made from the same elastomer material.

Abstract: A switchable pressure limiting valve with an electromagnet (1) and with a device (2) for opening and closing a passage for the fluid stream. The opening of the valve is determined by the balance of forces at the tappet (3) upon which the pressure force of the fluid at the P-connection (4), the pressure force of the fluid at the T-connection (13) and the forces of two springs (5) and (6) act. The force of the spring (6) is varied by means of the position of the armature of the electromagnet. When the pressure force at the P-connection (4) outweighs the sum of the other forces, the valve opens. The above-mentioned device for opening and closing is composed of a diaphragm (7) and of a sealing seat (12), and this diaphragm is tension-mounted sealingly between the magnetic pole (10) and the housing (21).

Abstract: A proportionally acting solenoid with a plastics encapsulation having a fastening flange which is integrally formed thereon and contains shaped elements which permit installation of the solenoid onto the housing by axial pressing in, rotation and rotary latching, the shaped elements, in interaction with metallic springs and shaped elements of the housing, holding the solenoid on a housing axially and against rotation, and the springs being tensioned upon rotation of the housing during the installation, and the seal which seals the radial gap between the solenoid and the housing being coordinated, by means of the configuration thereof, with a small axial installation force.

Abstract: The invention relates to a pump for pumping a fluid, including an inlet, an outlet, and a pumping chamber, wherein a valve is arranged between the inlet and the pumping chamber or between the pumping chamber and the outlet. The valve includes a valve body having a valve seat pointing in the direction of the outlet, and a valve member that interacts with the valve seat, wherein the valve member is loaded under pre-loading against the valve seat into a closed position of the valve and allows fluid to pass through in a pumping direction due to the valve member lifting off against the pre-load, wherein the valve body is accommodated in a receptacle of a pump part. A pump for which the development of noises and vibrations is reduced in that the valve body can move axially relative to the receptacle that accommodates the valve body.

Abstract: The invention relates to a reciprocating piston pump for delivering a liquid. The pump includes a solenoid with an actuator and an outlet port. A check valve with a seat body is assigned to the outlet port for keeping a return flow of the liquid out of the reciprocating piston pump. The seat body bears an impact damping face at a front face facing away from a valve seat of the check valve, and the valve seat of the check valve and the impact damping face are made from the same elastomer material.

Abstract: The invention relates to a proportional magnet, including a winding carried by a coil body, two pole shoes which project into the coil body from opposite sides and which are spaced apart axially from one another, and a gap provided between the pole shoes. The invention further includes a magnet armature, which is arranged within the winding in an axially displaceable manner substantially parallel to the longitudinal axis thereof. The axial movement of the magnet armature can be transmitted to a valve member. The invention still further includes an electrically conductive element, wherein the magnet armature can be moved through the element, wherein the element is formed from a basic body having an electrically conductive layer, and wherein the electrically conductive layer is applied separately to the basic body.

Abstract: A solenoid arrangement has at least one excitation coil and an armature arranged concentrically relative to the excitation coil and axially movable when the at least one excitation coil is supplied with current. A magnetizable cup-shaped housing part open at a first axial side is provided, wherein the at least one excitation coil is at least partially surrounded by the magnetizable cup-shaped housing part. A magnetizable yoke covers the first axial side for closing the magnetic circuit. A housing cover covering the solenoid arrangement is formed of plastic material, wherein the plastic material has at least one attachment flange for mounting the solenoid arrangement on other parts.

Abstract: A solenoid having increased axial force and low static friction on the armature is disclosed and provides an improved solenoid-driven hydraulic valve actuator. The solenoid includes a coil member, a pole piece having an inside surface with recessed and non-recessed portions to form an inner recess in the pole piece, an armature inside the pole piece, and a bearing held in the recess between the pole piece and armature, the bearing having an inner surface extending inwardly just beyond the inside surface of the pole piece non-recessed portion.

Abstract: A pyrotechnical actuator has a cylindrical housing surrounding a hollow chamber and a piston movably supported in the cylindrical housing. A piston rod is connected to the piston. A detonator is arranged within the hollow chamber and configured to produce a quantity of gas for moving the piston from an initial position in the cylindrical housing into an end position. The piston rod triggers an action when the piston moves into the end position or is positioned in the end position. The cylindrical housing is divided in a longitudinal direction of the cylindrical housing into housing parts. At least one holding element secures the housing parts relative to one another.

Abstract: A solenoid arrangement has at least one excitation coil and an armature arranged concentrically relative to the excitation coil and axially movable when the at least one excitation coil is supplied with current. A magnetizable cup-shaped housing part open at a first axial side is provided, wherein the at least one excitation coil is at least partially surrounded by the magnetizable cup-shaped housing part. A magnetizable yoke covers the first axial side for closing the magnetic circuit. A housing cover covering the solenoid arrangement is formed of plastic material, wherein the plastic material has at least one attachment flange for mounting the solenoid arrangement on other parts.