A bistable linear electromagnet comprising a first housing (10) and a second housing (11) in alignment, a movable armature (18) comprising a rod (19) and a shuttle (20) that is slidably mounted, and a first coil (13) positioned in the first housing and a second coil (15) positioned in the second housing. A cavity (25) is made in a measurement wall (4) of one of the housings, and the electromagnet comprises a magnetic field sensor (26) positioned in the cavity and designed to measure a magnetic flux existing in a magnetic path formed by the walls of said housing and by the shuttle, in order to detect whether the shuttle has moved towards or away from the abutment wall of said first or second housing.

Provided herein is an improved a bi-stable actuator including a first core component coupleable to a housing, the first core component including a central bore containing a shaft and a shaft spring. The actuator may further include a second core component extending around the first core component, wherein the second core component and the first core component are axially moveable relative to one another, and a third core component extending within the second core component, wherein the third core component and the second core component are axially moveable relative to one another. The actuator may further include a positioning sphere extending through an opening of the first core component, wherein the positioning sphere abuts the second core component when the bi-stable actuator is in a first position, and wherein the positioning sphere abuts a detent of the shaft when the bi-stable actuator is in a second position.

An actuator assembly including a first actuator having a first magnetically actuated plunger and a first latching plate, where the first plunger is operable to be magnetically latched to the first latching plate. The actuator assembly further includes a second actuator coupled to and axially aligned with the first actuator. The second actuator includes a second magnetically actuated plunger, a second latching plate, a sleeve positioned within and extending from the second plunger and being rigidly secured to the first plunger, and a tolerance spring wrapped around the sleeve. The second plunger is operable to be magnetically latched to the second latching plate, where latching of the second plunger causes the tolerance spring to compress and provide additional latching force of the first plunger to the first latching plate.

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.

An electromagnetic actuating device (10) has an energizable stationary spool element (1) having a stationary core area (2), an anchor unit (3) moveable relative to the spool elements (1) and the core area (2) and has permanent magnet elements (4) and a pestle (5) disposed on one end and having a free end section (5a) for engaging in an actuating partner, the anchor unit (3) being moveable along a longitudinal movement axis (L) in at least two actuating positions (A, B), and the actuator (10) having retaining elements (7) which are spaced apart from the core area, are permanent-magnetically flux-conductive and are formed in such a manner in a third actuating position (C) between the first and second actuating positions (A, B) for interacting with the permanent magnet elements (4) of the anchor unit (3) that the anchor unit is retained in a third actuating position (C) between the first and second actuating positions (A, B) and/or exerts a predefined force potential towards the actuating partner.

A bistable hoisting solenoid comprising first and second stroke end position and a stroke center position, comprising: a stator, one or more armatures, at least one coil, at least one permanent magnet and a spring system having a first spring which, in the first stroke end position, exerts a force in the direction of the stroke center position on the one or more armatures, and a second spring which, in the second stroke end position, exerts a force in the direction of the stroke center position on the one or more armatures. The one or more armatures, in the event of a loss of current, are held by permanent magnets in both stroke end positions. The first and the second springs have different paths with different lengths and/or exert in the respective stroke end position different sized forces on the one or more armatures and/or have different sized spring rates.

A bi-stable soft electromagnetic actuator includes a housing including a frame portion formed of a stretchable elastic body, a stretchable coil portion generating an electromagnetic field by applied power, located in the housing, and having a first surface and a second surface facing in mutually opposite directions, and at least a pair of permanent magnet portions respectively facing the first surface and the second surface of the stretchable coil portion and arranged to maintain a distance by the frame portion.

A bi-stable solenoid includes a housing, a wire coil, a permanent magnet, an armature, a pin, and a spring. The wire coil is arranged within the housing. The armature is slidably arranged within the housing and is moveable between a first armature position and a second armature position. The pin at least partially extends out of the housing and is slidably engaged by the armature. The spring is biased between the armature and the pin. When the pin encounters an intermediate position between a retracted position and an extended position due to the pin engaging an obstruction, the spring is configured to maintain a biasing force on the pin until the obstruction is removed.

A bistable electromagnetic actuator includes a housing extending along an exertion axis of the actuator, two excitation coils arranged inside the housing and having at least one winding around the exertion axis for generating a magnetic control flux, a core that can be moved along the exertion axis and immobilized in two end positions depending on the magnetic flux generated by the coils, an actuating member coupled to the core to form a movable assembly, and a manual control device comprising a drive shaft mounted such that it can rotate about a first axis orthogonal to the exertion axis.

The drive shaft has at least one tooth engaging with at least one first raised part translationally connected to the actuating member such that rotation of the drive shaft generates translational movement of the movable assembly.

A bistable solenoid valve device for a fluid system is provided. The bistable solenoid valve device comprises a bistable solenoid valve. The bistable solenoid valve comprises a permanent magnet. The bistable solenoid valve further comprises an armature displaceable between a first armature position and a second armature position. The bistable solenoid valve further comprises a first switching coil for energization for a displacement of the armature into the first armature position. The bistable solenoid valve further comprises a second switching coil for energization for a displacement of the armature into the second armature position. The bistable solenoid valve further comprises an evaluation device adapted to measure an induced coil voltage, an induced coil current, or both the induced coil voltage and the induced coil current, at one or more of the non-energized switching coils. The evaluation device is further adapted to assess a switching behavior of the armature.