The present disclosure relates to a low friction bearing liner for a solenoid that may include a core layer, a first outer layer overlying a first surface of the core layer, a second outer layer overlying the first outer layer, a first inner layer overlying a second surface of the core layer that is opposite of the first surface of the core layer, and a second inner layer overlying the first inner layer. The first outer layer and the first inner layer may include a fluoropolymer material and may have a melt flow rate of at least about 2 g/10 min at 372° C. The second outer layer and the second inner layer may include a fluoropolymer material distinct from the fluoropolymer material of the first outer layer and may have a surface coefficient of friction of not greater than about 0.2.

An electromagnetic actuating device. The device includes an electromagnetic coil including a central recess extending in an axial direction, a cylindrical pole tube inserted into the central recess and provided with a magnetic separation point, an armature situated displaceably in the pole tube, the armature being movable by an actuation of the electromagnetic coil, the armature being mounted in the pole tube in a sleeve-shaped bearing foil inserted into the pole tube, the bearing foil including an inner side facing toward the armature and used as a sliding surface and an outer side facing toward the cylindrical pole tube. It is provided that the bearing foil is coated at least on the inner side using a first layer made of perfluoroalkoxy polymer. A manufacturing method for such an electromagnetic actuating device is also described.

The invention relates to an electromagnetic actuating device (20) having at least two actuator units (1a, 1b) which are arranged adjacently in a housing (10) and which each have electrically energizable static coil means (2a, 2b), armature means (3a, 3b) mounted so as to be movable relative to said coil means, and a plunger (4a, 4b) which interacts with the armature means (3a, 3b) and which is mounted so as to be movable along axial plunger direction (S1, S2) and which has a free end portion (5a, 5b) for engagement into an actuation partner, in particular a guide groove of a camshaft, wherein the plungers (4a, 4b) of the actuator units (1a, 1b) of the actuating device (20) are preferably arranged such that the plunger directions (S1, S2) thereof run parallel to one another, and wherein the device (20) has adjustment means (6) which are integrated in the housing (10) and which serve for varying the arrangement of at least one plunger along a plane (E) perpendicular to the respective plunger direction (S1, S2).

A tattoo machine includes a tubular housing and an electromagnetic assembly disposed in the tubular housing. The electromagnetic assembly includes a first through-hole extending axially therethrough. A magnet unit is disposed in the first through-hole and includes a second through-hole extending axially therethrough. A core bar extends through the second through-hole and includes a tattoo needle on an end thereof. The tattoo needle can be actuated by the magnet unit to an exposed position outside of a bottom end of the tubular housing. An electric power transmission unit is electrically connected to the electromagnetic assembly. The electric power transmission unit can be in electrical connection with a power grid or a power supply and can output alternating current to the electromagnetic assembly.

The invention relates to an electromagnetic drive for a cutting device of a textile machine for severing a thread, to a cutting device having an electromagnetic drive, and to a yarn clearer having a cutting device. In order to provide an electromagnetic drive for a cutting device of a textile machine for severing a thread, the electromagnetic drive enabling particularly efficient, fast and/or precise operation of a cutting device having a cutting blade with large cutting force and also preferably enabling a particularly long uninterrupted and maintenance-free operating time, it is provided that: —the piston is partly guided in a core tube contained by the solenoid, the core tube being formed by the component which is stationary relative to the piston, and the axial air gap extending between the end face of the piston and an end face of the core tube, which end face is formed by the counter face; and/or—the piston is at least partly hollow; and/or—the piston is operatively connected to a returning element for returning the piston after the piston has been moved out of the rest position, the returning element having a progressive and, in particular, non-linear spring characteristic curve; and/or—the piston is surrounded by a solenoid core, which is stationary relative to the piston and which either is produced by powder injection moulding and/or is made from a soft ferrite or is made from a plurality of layers of an electrical steel sheet, more particularly from a non-grain-oriented electrical steel sheet.

To provide a solenoid configured so that vibration and noise in energization can be reduced.

A solenoid 1 is configured to use magnetic action in energization of a coil 2 to drive, in an axial direction, a core 4 at least including a first magnetic resistor. The solenoid 1 includes a shaft 5 attached to the core 4, and bearings 6, 7 supporting both end portions of the core. The solenoid 1 further includes a second magnetic resistor 4b configured to generate force for moving at least the core 4 in a radial direction by the magnetic action.

A central actuator for a magnet valve of a cam phaser, the central actuator including a housing that envelops the central actuator; a pole tube and a pole core that are arranged within at least one coil that generates a magnetic field; an actuation plunger that is arranged at an armature that is axially movable in a direction in an armature cavity; a closure element that closes the armature cavity, wherein the closure element includes at least one pole core insert that includes a central bore hole and a support bushing that is arranged in the central bore hole of the pole core insert, wherein the actuation plunger is supported axially movable in the support bushing, and wherein the closure element includes a closure cover and is provided as a pre-assembled module.

A solenoid actuator is provided having an armature assembly with a separate joined shunt side bearing consisting of a non-magnetic or slightly magnetic material. The material of the shunt side bearing prevents significant amounts of magnetic flux transferring through the lower bearing area of the armature assembly in the radial direction.

An electromagnetic actuator having a permanent magnet coupled to an armature of the electromagnetic actuator is provided. The electromagnetic actuator includes a housing, a pole piece arranged within the housing and secured by an end plate, and an armature assembly having an armature and a permanent magnet coupled to the armature. The armature is movable between a first position and a second position. The electromagnetic actuator further includes a wire coil positioned around the armature assembly and arranged within the housing. An actuation position of the armature between the first position and the second position is proportional to a magnitude of current applied to the wire coil.