Abstract: An electromagnetic relay includes a magnetic attractive member magnetically attractable by an electromagnet unit, and a conductive resilient plate connected to the magnetic attractive member and having a movable portion fixed to the magnetic attractive member, and a movable contact being urged to contact with a first stationary contact. A flexible conductive member is connected to the conductive resilient plate. When the electromagnetic unit is energized and attracts the magnetically attractive member to move the conductive resilient plate therealong, the movable contact contacts with a second stationary contact. When the electromagnetic unit is de-energized, the movable contact contacts with the first stationary contact.

Abstract: An armature for an injector including at least one magnetic region and at least one non-magnetic region, the armature being developed as a one-piece component, the magnetic and non-magnetic regions being integrally connected to each other by a two-component powder injection molding process, and the magnetic region being completely enclosed by the non-magnetic region.

Abstract: Disclosed is a magnetic contactor. A free space in which a DC converting circuit is provided is in a product can be secured by changing shapes of the movable core and the fixed core, and thus, in association with a low-capacity product, external AC power may be converted into DC power even without enlarging a size of a product. Also, a normal position member may be included in a movable core, and may induce the movable core to the original position, and thus, a mechanical mechanism relationship between the switch manipulating part included in the movable core and the other element is maintained.

Abstract: An example variable reluctance device includes a load structure connected to an armature through a connecting arm. The armature is positioned between two oppositely oriented core structures. A structural frame secures the core structures in a fixed position, forming gap regions between the core structures and the armature, forming a magnetic circuit. The armature is resiliently centered between the core structures by a spring, such that the gaps and are approximately equal in width when the armature is at rest. The device further includes a magnetic substance within the gaps that is compressed or stretched to allow movement of the armature.

Abstract: An object of the invention is to provide a contact switching device that produces minimal hitting sound at the time of return. In the contact switching device, a movable iron core (42) provided at one end portion of a movable shaft (45) is attracted to a fixed iron core (38), based on excitation and degauss of an electromagnet portion (50), by which the movable shaft (45) reciprocates in a shaft center direction, and a movable contact (48a) of a movable contact piece (48) arranged at another end portion of the movable shaft (45) contacts and departs from a fixed contact (33a). Particularly, at the time of return, an annular flange portion (45a) provided at an intermediate portion of the movable shaft (45) abuts on an annular receiving portion (35c) of the magnet holder (35) to thereby restrict a position of the movable iron core (42).

Abstract: An activation element of an electromagnetic actuating unit of a hydraulic valve which has an armature that is essentially cylindrical and which is arranged in a slidable fashion in the actuating unit. Also, a method for manufacturing an activation element of an electromagnetic actuating unit of a hydraulic valve. The activation element has at least one substantially cylindrical armature, one plunger rod and one magnet cone. The plunger rod and the magnet cone are embodied in one piece with the armature.

Abstract: A device for controlling the flow of a liquid or gaseous medium, has at least one flow opening for the medium, and a movable valve element for controlling the flow opening. At least one damping body, which is preferably viscoelastic and acts on the valve element, is provided for obtaining a large dynamic range of the device in order to control flow in a fine, precise, and oscillation-free manner across a broad range of flow volume.

Abstract: A solenoid valve for controlling a fluid includes an armature having a base region, a lateral region and a head region. The solenoid valve includes a valve member connected to the armature. The solenoid valve further includes an armature casing component in which the armature is positioned. A flow path is formed between the armature and the armature casing component, the flow path extending from a lower armature space to an upper armature space and back to the lower armature space. A junction region is arranged between the head region and the lateral region. The junction region has at least one groove formed therein to facilitate an overflow between the lateral region and the head region.

Abstract: A magnetic actuator unit is provided for a circuit breaker, such as a medium voltage vacuum circuit breaker. The magnetic actuator unit includes a core, a coil, an actuating shaft, a first movable plate, a second movable plate, and a non-magnetic flat insert arranged between the core and the second movable plate. The magnetic actuator unit configured to switch the circuit breaker ON and OFF by moving the first movable plate between an ON position and an OFF position. The non-magnetic flat insert and the second movable plate are configured to adjust a holding force of the magnetic actuator unit provided by the second movable plate at the OFF position. The holding force is sufficient for holding the second movable plate at the OFF position against outer forces that are acting on the magnetic actuator unit.

Abstract: A housing designed to house an electromagnetic relay comprises a switching member including electrical contact switching pieces, able to move in translation along a principal direction. The housing has a hollow body receiving the switching member, elements fixing the body to a support. The fixing elements each include a fixing part having a surface bearing on the support and means of fixing to the support. The fixing elements further have a connection part connecting the fixing part to the body and the connection parts are designed so as to deform in flexion at least along the main direction.

Abstract: Method for controlling the position of an electromechanical actuator for reciprocating compressor valves. The actuator includes a member (302) movable in a direction parallel to the direction for opening and closing the obturator of the valve (12), between a position corresponding to the closed position and a position corresponding to the open position of the obturator (11). The member (302) is provided with a mechanism (322) able to act on the obturator (11) and with a magnetizable portion (312) co-operating with two electromagnets (102, 202) and being arranged in equilibrium between the latter via a suitable mechanism.

Abstract: An electromagnetic valve includes a valve body, a valve element, a movable iron core, a guide tube, a coil, a yoke, and a fixed iron core. The valve body includes a fluid flow path. The valve element is movable and seated on a valve seat provided in the fluid flow path of the valve body. The movable iron core moves the valve element with respect to the valve seat. The guide tube is cylindrical and movably supports the movable iron core. The coil is mounted on an outer periphery of the guide tube. The yoke covers an outside of the coil and forms a magnetic circuit. The fixed iron core is provided facing the movable iron core and attracts the movable iron core by energization of the coil. The valve body is coupled to the guide tube on one opening end side of the guide tube, and the fixed iron core is provided on an other end side of the guide tube with a clearance spaced from an inside of the guide tube.

Abstract: A diaphragm pump (1) having a diaphragm (11), a solenoid with a movable magnetic armature (8) as a drive element for the diaphragm (11), and a stop element (9) for adjusting the stroke for the drive element (8). The diaphragm pump includes at least one elastic damper (36) between the drive element (8) and the stop element (9), which elastic damper (36) has at least one compression chamber (26) which is surrounded and formed by at least one elastic boundary wall and by at least one rigid boundary wall of the drive element (8) and/or stop element (9).

Abstract: An electromagnetic actuator (20) comprises a stator (22), a piston (24), and a key (26). The stator comprises a stator frame (30) having an axial direction (32), the stator frame in turn comprising a magnetic member (50) and a base (52). The base (52) is separated by a gap (56) in the axial direction from the magnetic member (50) and positioned so that magnetic flux extending through the magnetic member (50) also extends through the base (52). The piston (24) is configured to reciprocate within the stator frame (30) in the axial direction (32). The key (26) is configured and position both to locate the base (52) with respect to the stator frame (and thereby provide the gap) and to absorb energy when the piston (24) strikes the base. A flux transfer flange (60) is configured to concentrate magnetic flux extending through the magnetic member (50) in a radial direction into the base (52).

Abstract: A solenoid device having an armature and a corresponding armature element which is arranged on the inside of the armature is disclosed. The armature and the corresponding armature element can be moved in relation to one another. An intermediate element which is provided for producing a supporting contact with the corresponding armature element is mounted in an axially movable fashion in a guide recess in the armature, and the intermediate element is operatively connected, on its side facing away from the corresponding armature element to a spring element. The intermediate element is at least partially conical. A driver assistance device is also disclosed.

Abstract: A solenoid valve and an automatic document feeder using the solenoid valve are provided. The solenoid valve includes a valve body, a valve spindle, a spring, a ring-shaped groove and muffling ring. The ring-shaped groove is sheathed around the valve spindle. The muffling ring is disposed within the ring-shaped groove. When the valve body is magnetized to magnetically attract the valve spindle, the valve spindle is moved within the valve body, and the muffling ring collides with the recess inner wall, thereby reducing collision noise.

Abstract: An electromagnetic switch for use in actuating a starter for automotive vehicles is provided. The switch includes fixed contacts, a moving contact, and a plunger shaft. The moving contact is joined to a plunger shaft through an insulator. The plunger shaft is to be moved magnetically to bring the moving contact into abutment with the fixed contact to establish electric communication between the fixed contact. The switch also includes a rotation holder working to hold the moving contact and the insulator from rotating relative to each other. Use of the rotation holder results in a decrease in wear of the insulator. This eliminates the need for the insulator to have an additional thickness which would be worn down, thus permitting the insulator to be reduced in thickness to shorten the overall length of the switch.

Abstract: In an electromagnet switch, a stationary iron core is composed mainly of a base part and a disk part. The base part is faced to a plunger and the disk part is forcedly inserted and fixed to a boss part formed in the base part. The disk part is composed of a metal plate of ferromagnetic substance (iron plate) and another substance plate (made of resin or rubber and the like, for example,) of a smaller spring constant or a larger damping coefficient than that of the metal plate. The metal plate and another substance plate are laminated. Another substance plate absorbs or reduces the impact force when the plunger is electromagnetically attracted toward and collides with the base part. The propagation of a large impact noise or crashing sound is thereby suppressed, and as a result the impact noise can be reduced.

Abstract: According to the present invention, there is provided a solenoid switch which includes a pair of fixed contacts spaced away from each other, a solenoid, a contact pressure applier, and a moving contact. The moving contact is configured to be moved by the solenoid to strike the fixed contacts and keep contact with the fixed contacts under pressure applied by the contact pressure applier, thereby bridging the fixed contacts. The moving contact is also configured to have, when striking the fixed contacts, a flexural rigidity lower than or equal to 1000 N/mm, thereby preventing contact bounce from occurring in the solenoid switch.

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 type device as a magnetic switch of a starter 10 comprises an exciting coil 3f that is energized and generates magnetic force, a plunger 3a that is a moving core which is a part of the magnetic circuit, and a fixed core 3j that faces the moving core and is also a part of the magnetic circuit. The moving core plunger 3a is divided into concentrically the first plunger 31 and the second plunger 32a. This configuration allows the second plunger 32a to be attracted first and then the first plunger 31a to be attracted. Thereby, it is possible to make a small and light magnetic switch while ensuring that the magnetic switch maintains sufficient attraction force as well as to increase reliability of operations of the magnetic switch even when battery voltage is low.

Abstract: The solenoid valve of the present invention includes an armature with a protrusion and a plug nut with a recess for receiving the protrusion. The protrusion includes a polymer o-ring. The protrusion is configured such that it slides freely within the recess. The o-ring contacts the plug nut to prevent further motion of the armature toward the plug nut after the protrusion has entered the recess.

Abstract: An electromagnetic valve (100) which can ensure a predetermined response behavior while sustaining a desired control performance with operation noise being suppressed even after operation over an extended time includes a plunger assembly (15) having a plunger (7), a coil (2) for driving the plunger (7), a fixed core (4) disposed in a direction in which the plunger (7) is displaced for attracting the plunger assembly (15) to a retracted position upon electrical energization of the coil (2) to thereby hold the plunger at that position, a resilient member (8) disposed, being compressed, between the plunger (7) and the fixed core (4) to resiliently urge the plunger assembly (15) to an advanced position, and a spacer (9; 39) interposed between the plunger (7) and the fixed core (4). The spacer (9; 29; 39; 49) is provided with a protrusion (9a; 29a).

Abstract: A microactuator design and fabrication method for an improved magnetic microactuator incorporating mechanical stroke limiters and integrated connections between the flex on suspension and slider. The stroke limiters, also referred to as bumper system, and integrated connections enable low power, mechanically robust operation of the microactuator during high seek operations. In addition, improved head gimbal assembly yield results due to the integrated head connections formed on the microactuator.

Abstract: A magnetic damper comprises a movable braking plate for receiving an operating element of an actuator, and a stator for attracting the braking plate by a magnetic force. A magnetic attraction force acting between the stator and the braking plate is used as a braking force for stopping the operating element.

Abstract: A fuel injector, particularly a fuel injector for fuel injection systems in internal combustion engines, has a valve needle, which cooperates with a valve-seat surface to form a sealing seat, and an armature, which engages with the valve needle, the armature being movable along the axis of the valve needle and being damped by a damping element made from an elastomer. In this context, a first intermediate ring is situated between the armature and the damping element. The damping element rests on the flange, which is connected in a force-locking manner to the valve needle. The intermediate ring and/or the flange is furnished with radial and/or axial channels which connect an interior volume located between the valve needle and the damping element to a central cutaway of the fuel injector.

Abstract: A linear actuator includes a screw shaft rotatably supported within a housing with play in motion in the axial direction of the screw shaft, and a cushioning stopper disposed between the housing and the screw shaft and elastically deformable to absorb a force acting from the screw shaft to the housing when the screw shaft is forced to move relative to the housing in the axial direction within the range of the play at an abutment of a rod with an obstacle or stopper. When the rod is stopped moving, the motor current increases with the degree of elastic deformation of the cushioning stopper. An overload sensor cuts off the supply of power to an electric motor when excessive current in the motor is detected.

Abstract: To reduce the rebound of the main armature with contact carrier in response to the switching operation of a contactor, magnetic-chamber base of contactor housing is provided with two support areas for the magnet yoke, said areas having different resiliencies. To this end, the magnetic-chamber base, designed so as to be capable of vibrating, has a supporting strip whose ends act as magnet-supporting areas.

Abstract: A solenoid for an electromagnetic valve is provided with a bobbin on which a coil has been wound, a movable iron core fitted into an iron core hole of the bobbin and a fixed magnetic pole member attracting the movable iron core, the movable iron core has a main body portion with an even section fitted into the iron core hole, and a flange portion with an even section formed on a portion extending from the iron core hole of the main body distal end, and the ring has a first portion which is positioned on a distal end side and which has a large diameter hole in which the flange portion is fitted and a second portion which is positioned on a proximal end side and which has a small diameter hole in which the main body portion is fitted.

Abstract: A method of punching a via or through hole in a polymer-metal laminate workpiece in a punch press. The punch press has a punch tool, a driver coil for driving the punch tool through the polymer-metal laminate workpiece, and a stopper for stopping the punch travel of the punch tool and mechanically returning the punch tool to its starting position. The method includes the steps of applying an electrical current pulse through the driver coil to electromagnetically drive the punch downward to and through the workpiece, and then elastically colliding the punch tool with the stopper to stop and return the punch tool on an upward return stroke. Subsequently a second, braking pulse is applied through the driver coil to electromagnetically brake the punch. The second electrical current is applied after the start of the punching pulse, for a time and magnitude sufficient to brake the punch press.

Abstract: DC electromagnet comprising a magnetic circuit equipped with a yoke and a magnetic core fixed at its ends with vanes and capable of axial displacement. The magnetic core 21 is smooth and the vanes 22,23 are shrink fitted and fixed to the ends of the smooth core. One of the vanes 22 is fixed to the core in a reference position and is then put into contact with the associated flange 25 of yoke 14, and the other vane 23 is shrink fitted and pushed into an adjustable position determined by bringing the yoke 14 into contact with the other flange 26.

Abstract: An electromagnetic actuator for operating a driven component includes first and second electromagnets having respective first and second pole faces oriented toward one another and defining a space therebetween; an armature disposed in the space and movable back and forth between the first and second pole faces; a driving component attached to the armature for moving therewith as a unit; and a resetting spring assembly coupled to the armature and exerting forces opposing movements of the armature caused by electromagnetic forces generated by the electromagnets. The resetting spring assembly is in a relaxed state when the armature is in a mid position between the first and second pole faces. A coupling device connects the driving component with the driven component for effecting a transmission of pushing and pulling forces from the driving component to the driven component to cause displacements of the driven component as a function of displacements of the armature and the driving component.

Abstract: An electromagnetic actuator for operating a driven member includes an electromagnet having a yoke provided with a pole face and a coil supported by the yoke and adapted to be supplied with electric current to produce an electromagnetic force; and an armature connectable to the driven member and movable in a path of motion into a first position and a second position spaced from the first position. The armature is moved by the electromagnetic forces into the second position in contact with the pole face. A resetting spring is coupled to the armature and exerts a spring force thereon for urging the armature away from the second position toward the first position. The actuator further includes a dampening assembly which has a piston affixed to the armature and a dampening cylinder provided in the yoke and having an open end oriented toward the armature and being in an axial alignment with the piston. In the first position of the armature the piston is axially spaced from the dampening cylinder.

Abstract: A rectilinear motion solenoid having a housing, an annular coil of electrical wire mounted in the housing and having a central hole therethrough. A first magnetic pole piece is oriented adjacent a first axial end face of the annular coil and a second magnetic pole piece oriented adjacent a second end face of said annular coil. An armature is movably mounted in the central hole. Two substantially linear springs are provided for securing the armature to the housing to effect a frictionless resilient suspension of the armature in the central hole. A closed chamber is filled with a liquid so that a disk movable with the armature is also movable in the chamber. A perimeter of the disk is oriented in close relation to an interior wall surface of the chamber to define a liquid flow restricting gap therebetween and effecting during operation a dynamic dampening of armature movement.

Abstract: An actuator positioned in accordance with two signals, the first being predominant and having a noise portion of magnitude which would mask the second signal and wherein the first signal is filtered to remove the noise and is connected to the actuator independently of the second signal so that the resultant motion of the actuator is additive of the two signals.

Abstract: A solenoid with liquid in the gaps between a moving and stationary element is disclosed that includes a secondary kick-back spring used to overcome the viscosity and surface tension effects of the liquid in the gap during the de-energizing phase of the solenoid action. Various secondary spring designs as well as surface shapes of the butt or plunger ends are possible in order to decrease the contact surface area of the ends of either the moving or stationary elements used in the solenoid and also are also used to decrease the viscosity and surface tension effects of the liquid.

Abstract: The invention relates to an electromagnet, comprising a coil (30) which can be supplied with current and which thus generates a magnetic field and moves an armature (11) when supplied with current, and wherein the armature (11) serves for controlling a valve or another element. In order to improve the running properties of the armature (11), it is proposed that the armature (11) runs on a plastics sliding surface (2), in particular a sliding film (20) made of plastic.

Abstract: An inexpensive and simple magnet damping arrangement, in particular for contactors with a.c. solenoids, is to be created. The non-switching magnet yoke of an electromagnet system with magnet coil is damped by a single damping compression spring which is supported on the bobbin of the magnet coil at one end and directly on the magnet yoke at the other end.

Abstract: An electromagnetic actuator for actuating a gas-exchange valve in a reciprocating internal combustion engine, the electromagnetic actuator comprising: an armature which is operatively connected to the gas-exchange valve; two electromagnets, each having a pole face; two oppositely oriented restoring springs; wherein the armature is guided in a reciprocating manner counter to the force of the two oppositely oriented restoring springs between the pole faces of the two electromagnets whose current supply can be controlled by a control device, the two electromagnets being disposed in mutual spacing and acting as opening and closing devices; and at least one additional mass which is associated with the gas-exchange valve and can be guided so that it is movable relative thereto and in the same direction of the gas-exchange valve, the at least one additional mass entering into operative connection with the gas-exchange valve, in the final phase of the armature's motion in the direction of a respective one of the two

Abstract: A solenoid includes a ferrofluid in gaps between the moving and stationary elements which ferrofluid reduces noise caused by activating a plunger positioned within the solenoid. A permanent magnet can be included as a solenoid element to increase magnetic field strength within the solenoid to retain the ferrofluid within the solenoid.

Abstract: The conical valve seat in the valve body of a fuel injector has a circumferential groove means forming a pocket to capture an amount of the fuel that flows through the injector. The needle valve seals and seats on the downstream edge of the groove means, but is not in contact with the upstream edge. The groove means functions to improve "durability wear" of the components and as a result eliminates a "lean shift" in the dynamic flow rate of the injector. In addition the groove means functions as a dampening means to the closing of the needle on the valve seat. In the manufacturing of the conical valve seat, the valve seat is fabricated, the groove means is formed, the valve seat is then hardened and a light grind smoothes out the valve seat.

Abstract: A solenoid includes a ferrofluid in gaps between the moving and stationary elements which ferrofluid reduces noise caused by activating a plunger positioned within the solenoid. A permanent magnet can be included as a solenoid element to increase magnetic field strength within the solenoid to retain the ferrofluid within the solenoid. A cushion located between the plunger and a butt toward which it moves also reduces the noise, while the ferrofluid maintains a relatively high solenoid force relative to a solenoid with air gaps.

Abstract: An electromagnetic relay structure having a plate spring and a yoke secured to a base by forming a vibration damping portion integral with a terminal and by securing the terminal to the base by insertion molding. The vibration damping portion is disposed between an L-shaped yoke, an end of which is secured to the base, and the terminal, which is also fixed to the base. The vibration damping portion is spot welded to a plate spring, which is secured to the yoke. A spot welding machine is provided for fixing the plate spring to the vibration damping portion. The spot welding machine has electrodes that are rotated by motors while effecting spot welding of the material.

Abstract: The active vibration-absorber is, in particular, an engine mount for motor vehicles. A magnet system has a magnet casing which receives a permanent magnet and which is guided in the assembly so as to be capable of movement in the axial direction. An electrical moving coil projects perpendicularly from a carrier plate and moves into the magnet casing. The carrier plate can be connected to a vibrating machine part, such as between the engine and the vehicle frame. The magnet system is held, in the axial direction, by a magnetic leakage field which is present between the magnet system and stationary ferromagnet.

Abstract: An apparatus that controls impact noise of a solenoid by energy dissipation through both resilient and pneumatic devices. This is achieved by providing a device between the plunger of the solenoid and a machine member. The device includes a predetermined number of orifices which are of different sizes and placed at different locations. This forms an air metering system and controls the stiffness of the device for maximum impact noise attenuation.

Abstract: A low-noise solenoid has an armature with a projecting ridge receivable within a groove in a pole piece. As the ridge enters the groove, the magnetic force which opposes a return spring decreases until there is equilibrium whereat the armature remains suspended without impacting upon the pole piece.

Abstract: An electromagnetic device for cameras includes a yoke that has a contact surface and is attached to a base plate. An armature having a contact surface faces and is movable into contact with the contact surface of the yoke. An armature shaft has one end attached perpendicularly to the contact surface of the armature, and has a catch at its opposite end. An armature lever is freely movable on the shaft between the catch and the armature. A biasing member, such as a spring, biases the armature away from the yoke. A coil is provided on the yoke, and when in an excited state, causes the contact surface of the armature to come into contact with the contact surface of the yoke to magnetically adhere the armature to the yoke, and when in an unexcited state, disengages the armature from the yoke. The armature lever includes one or more openings, such as a circular hole and/or an elongated slot, that are used to apply an elastic adhesive between the armature lever and the armature.

Abstract: An armature lever is attached by an elastic adhesive to a catch located on an end of an armature shaft of an electromagnetic device of a camera, which is used to drive, for example, a shutter, stop, and/or mirror(s) of the camera. The armature lever and the catch can be attached by the elastic adhesive so that they abut each other or so that a gap exists between them. When the gap is provided, the gap can be filled with the elastic adhesive to further absorb any shock occurring when the armature lever and catch contact each other. A reset member, such as, for example, a spring that biases the armature toward the yoke also can be attached by the elastic adhesive to the armature shaft.

Abstract: A magnet switch for a starter device includes a plunger on which a sufficient pull force can be exerted. The plunger drives a movable contact, and is guided by a sleeve so as to move therealong. An excited coil wound on a bobbin is provided around an outer periphery of the sleeve. The exciting coil is covered by a cylindrical frame of a magnetic material, and a bottom plate portion of the frame has an opening fitted on the outer periphery of the sleeve. A cushion spring is interposed between the bottom plate portion of the frame and the bobbin to hold the exciting coil in a predetermined position. The cushion spring has an annular portion disposed in contact with the bottom plate portion and the outer periphery of the sleeve, and a magnetic path can be formed between the annular portion and the plunger.

Abstract: An electromagnetic armature assembly includes a spider made of resiliently yieldable plastic and carrying an annular armature plate. A mounting disc is insert molded into the spider and is adapted to be assembled with a tubular hub mountable on a rotatable shaft. The mounting disc enables the armature assembly to be mounted on various types of hubs, either with no change to the armature assembly or with very little change.