Polarized Electromagnet Patents (Class 335/230)
  • Patent number: 10529522
    Abstract: A circuit breaker includes a current entry which conducts an electrical current via a wound coil conductor strip of a first coil to a first fixed contact, and includes a contact rocker which can be moved between two switching positions. The contact rocker includes mutually connected contact limbs. A first switching position of the contact rocker, electrically connects the first fixed contact with a second fixed contact which is connected via a wound coil conductor strip of a second coil to a current exit for dissipating an electrical current flowing through the contact limbs of the contact rocker and the coil conductor strips of the coils to a current exit of the circuit breaker.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: January 7, 2020
    Assignee: WÖHNER GMBH & CO. KG ELEKTROTECHNISCHE SYSTEME
    Inventors: Philipp Steinberger, Hubert Lenker
  • Patent number: 10431407
    Abstract: Systems, methods, techniques and apparatuses of contactors are disclosed. One exemplary embodiment is a contactor including an electric pole, a pair of plungers, and a pair of opening springs. The electric pole includes a fixed yoke member and a movable yoke member arranged respectively at a proximal position and a distal position with respect to a movable contact. The fixed yoke member includes a pair of through holes. The pair of second plungers are inserted in a corresponding through hole passing through the fixed yoke member and symmetrically positioned with respect to a main symmetry plane of the contactor, which is parallel to a displacement axis of the movable contact and perpendicular to a displacement plane of the movable contact. The pair of opening springs are symmetrically positioned with respect to the main symmetry plane.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: October 1, 2019
    Assignee: ABB Schweiz AG
    Inventors: Andrea Delpozzo, Emanuele Morelli, Osvaldo Prestini, Veronica Biagini, Christian Simonidis
  • Patent number: 10404150
    Abstract: An energy harvesting device includes a core portion, a first magnet, and a second magnet. The core portion has an electrical output and can move from a first disposition to a second disposition. The first magnet is disposed to provide first magnetic field lines therethrough in a first direction. The second magnet is disposed to provide second magnetic field lines therethrough in a second direction. The core portion, the first magnet and the second magnet are arranged such that externally applied vibrations in a third direction normal to the first direction cause the core portion to oscillate between the first disposition and the second disposition.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: September 3, 2019
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Paul D. Swanson, Brian B. Dick, Maxwell Kerber, Alex G. Phipps
  • Patent number: 10217554
    Abstract: A bistable electromagnetic actuator device, a permanent magnet means (12; 12a, 12b), as well as an armature unit (18) with an elongate plunger unit (10) extending along a moving direction, wherein said armature unit can be moved into at least one of two end and/or stop positions that are stable in the deenergized state by means of stationary electromagnetic driving means (22), wherein stationary magnetic field detector means (34; 34a, 34b) are assigned to a housing (20), which at least sectionally encloses the armature unit, for the contactless interaction with the permanent magnet means in at least one of the end or stop positions provided for the armature position detection, wherein the plunger unit features a terminal contact and/or engagement section (28) for interacting with an actuating partner in a contacting and non-positive fashion such that a non-positive contact and/or actuation by the actuating partner causes a motion of the armature unit into one of the end or stop positions, in which the armatur
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: February 26, 2019
    Assignee: ETO Magnetic GmbH
    Inventors: Oliver Thode, Joerg Buerssner
  • Patent number: 10199192
    Abstract: An improved bi-stable electrical solenoid switch comprising a solenoid being wound with coil windings. The solenoid having a central aperture defined therein, and the coil windings, which when engaged by a power source, generates a magnetic field. A magnetic coupling member mounted on the solenoid. A plunger partially disposed in the central aperture for movement into and out of the central aperture. A conductive plate coupled to the plunger and provided with contacts on each end of the conductive plate. The conductive plate configured to electrically engage and disengage the solenoid upon respective application of power to the solenoid. The magnetic coupling member configured to reduce the force needed by the solenoid to remain in an open position when selectively energized for moving and retaining the conductive plate of the plunger against the solenoid for allowing wide operating voltage and reduced operating power.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: February 5, 2019
    Assignee: LITTLEFUSE, INC.
    Inventors: Chad Beauregard, Justin Kaufman, Brent Glad
  • Patent number: 9966215
    Abstract: The disclosure relates to a permanent magnet actuator comprising: a stator iron core having a space therein-side, and having a first wall and a second wall opposing the first wall; a movable element moving reciprocally between the first wall and the second wall, along a moving axis which connects the first wall and the second wall inside the space; a first magnetomotive force supplying body and a second magnetomotive force supplying body disposed respectively on the first wall and the second wall, so as to supply a magnetomotive force to the movable element for the reciprocal movement thereof, wherein, at least one of the first magnetomotive force supplying body and the second magnetomotive force supplying body selectively produces a bidirectional magnetomotive force; a permanent magnet disposed between the first magnetomotive force supplying body and the second magnetomotive force supplying body, and providing a coercive force to the movable element for maintaining the state thereof; and a driving circuit co
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: May 8, 2018
    Assignee: Entec Electric and Electronic Co., Ltd.
    Inventors: Young Bong Bang, Chang Hyuk Lee, Ji Won Choi, Young Il Kim, Heung Ryeol Koh, Myeong Seob Choi
  • Patent number: 9934924
    Abstract: A bistable relay and a bistable actuator are provided. The bistable actuator includes a magnetic latching mechanism and an electromagnet. The magnetic latching mechanism includes a rotation shaft, a pillar-shaped permanent magnet, a columnar hollow magnetic conductor and two shells, and operates between a first and second stable states. The columnar hollow magnetic conductor surrounds the pillar-shaped permanent magnet wrapping the rotation shaft, and maintains a gap with the pillar-shaped permanent magnet. The electromagnet is connected to the columnar hollow magnetic conductor for driving the pillar-shaped permanent magnet to rotate, so as to switch the magnetic latching mechanism to the stable state. During a process that the magnetic latching mechanism is switched to the stable state, the rotation shaft rotates synchronously along with the magnetic latching mechanism to drive an impact system to move relative to a contact system, so as to contact or disconnect the contact points.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: April 3, 2018
    Inventor: Chih-Chuan Liang
  • Patent number: 9765738
    Abstract: A fuel injector includes a fuel valve with a valve seat and a movable valve needle, a calibration spring and an electromagnetic actuator with a solenoid and a movable armature. The calibration spring exerts a pressing force on the valve needle for pressing the valve needle in a closing direction towards the valve seat. When the solenoid is electrically energized, the electromagnetic actuator is operable to transfer a lifting force to the valve needle by engagement with the armature for lifting the valve needle from the valve seat to a fully open position against the pressing force of the calibration spring. The calibration spring and the electromagnetic actuator are configured such that the lifting force equals the pressing force in the fully open position.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: September 19, 2017
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Ivano Izzo, Marco Mechi
  • Patent number: 9761396
    Abstract: The present invention provides a magnet, which comprises a body having a first and a second section, and a slide arranged to be movable relative to the body between a first and a second position. The slide comprises a permanent magnet, and a first and a second pole piece that are attached to opposite magnetic pole surfaces of the permanent magnet. The first section comprises a hole that opens into a first cavity of the body, the bottom of the first cavity being delimited at least partly by the second section. The slide is movably arranged in the hole so that the second pole piece is directed towards the bottom of the first cavity, wherein at the first position of the slide, magnetic flux generated by the permanent magnet is short-circuited by the first section, and at the second position of the slide, magnetic flux generated by the permanent magnet is directed through the first and the second section.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: September 12, 2017
    Assignee: Ixtur OY
    Inventor: Reijo Nätti
  • Patent number: 9711269
    Abstract: A torque motor actuator includes a first magnetic pole piece, a second magnetic pole piece, an armature, and an armature stop. The second magnetic pole piece is spaced apart from the first magnetic pole piece to define an armature gap. The armature is disposed in the armature gap and is spaced apart from the first and second magnetic pole pieces. The armature includes a magnetically permeable material and has a central portion, a first arm, and a second arm. The armature is rotationally mounted at the central portion, and the first and second arms extend, in opposite directions, from the central portion. The armature stop extends from the first arm, and comprises a non-magnetic material. The armature stop is configured, upon rotation of the armature, to selectively engage one of the first or second magnetic pole pieces to thereby limit armature rotation.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: July 18, 2017
    Assignee: HONEYWELL INTERNATIONAL INC.
    Inventors: James Williams, Douglas Klontz, Dan Carter
  • Patent number: 9677774
    Abstract: A convection oven is disclosed. The convection oven comprises a housing having an oven cavity and an oven door for access to the oven cavity, at least one air blower for generating heated air, one or more air channels for directing the heated air from the air blower toward the oven cavity, and one or more removable air plenums, wherein each removable air plenum is connected to one of the one or more air channels, comprises an air intake edge for receiving the heated air from the air channel, defines the top or the bottom of a cooking chamber within the oven cavity, and comprises a plurality of air vents for directing the heated air into the cooking chamber. The convection oven may further comprise a control panel for separately and independently controlling each of the cooking chambers defined by the removable air plenums.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: June 13, 2017
    Assignee: Alto-Shaam, Inc.
    Inventors: Philip R. McKee, Lee Thomas VanLanen, Todd Coleman
  • Patent number: 9530552
    Abstract: A magnetic circuit switching device with single-sided attraction includes a housing with a first side and a second side individually arranged at either side, where the first side has an attraction surface to attract an iron core; a permanent magnet having a first type magnetic pole and a second type magnetic pole individually arranged at inner and outer side with opposite properties; a nonconductive axial tube for the iron core to engage, having an opening at the right side extending to the second side of the housing; and a spring providing elastic force for the iron core to displace. With a magnetic path alteration function and the elastic force from the spring, the structure is able to keep the iron core in a pre-determined position. Therefore the iron core has a wider stretching range for operation, increasing the possibilities of wider application and ensuring in-time adjusting in case of deviation and wear and tear of the device.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: December 27, 2016
    Inventors: Yu-Chiao Shen, Tung-Po Wu
  • Patent number: 9472367
    Abstract: An electrical switching apparatus includes a ferromagnetic frame having first and opposite second portions, a ferromagnetic core disposed therebetween, a permanent magnet disposed on the first portion, a first tapered portion on the opposite second portion; a coil disposed about the core; and a ferromagnetic or magnetic armature including a first portion, an opposite second portion and a pivot portion pivotally disposed on the core between the portions of the armature. The armature opposite second portion has a complementary second tapered portion therein. In a first armature position, the armature first portion is magnetically attracted by the permanent magnet and the first and second tapered portions are moved apart with the coil de-energized. In a second armature position, the armature opposite second portion is magnetically attracted by the opposite second portion of the frame and the first tapered portion is moved into the second tapered portion with the coil energized.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: October 18, 2016
    Assignee: LABINAL, LLC.
    Inventors: Patrick W. Mills, James M. McCormick, Richard G. Benshoff, Robert J. Innes
  • Patent number: 9418811
    Abstract: A relay includes a fixed contact point, a movable contact member and an electromagnetic device. The electromagnetic device includes a bobbin, a coil, a movable iron core, a first armature, a second armature, and a ferromagnetic member. The first armature has a first hole to which a first end portion of the movable iron core is insertion-fitted. The second armature has a second hole to which a second end portion of the movable iron core is insertion-fitted. The bobbin has a first rib formed on each of facing surfaces of a pair of first side pieces and a second rib formed on each of facing surfaces of a pair of second side pieces. The first armature is interposed between the first ribs of the pair of first side pieces and the second armature is interposed between the second ribs of the pair of second side pieces.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: August 16, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tomoaki Sasaki, Takafumi Imai
  • Patent number: 9368304
    Abstract: A polarized relay comprising an electromagnet, a two-pole or three-pole permanent magnet, an armature, and switches, which are mounted in and on a shelf-like support component. The support component accommodates magnetic flux pieces and the permanent magnet in an upper cavity, and the permanent magnet is magnetized while the electromagnet is still outside the support component. Subsequently, the electromagnet is inserted into lower cavity of the support component and the rest of the components of the relay are mounted.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: June 14, 2016
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventors: Jens Heinrich, Christian Mueller, Ralf Hoffmann
  • Patent number: 9275815
    Abstract: An electromechanical relay is provided, comprising a magnetic system and a pivotable armature. A diagnostic switch is arranged on one side of the relay, and the set of contacts of the diagnostic switch is driven by the adjacent leg of the armature. A load switch is arranged on the bottom side of the relay and is driven by the second leg of the armature via an insulating coupling member.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: March 1, 2016
    Assignee: Phoenix Contact GmbH & Co. KG
    Inventors: Ralf Hoffmann, Jens Heinrich, Christian Mueller, Olaf Abel, Thomas Kuehne
  • Patent number: 9153403
    Abstract: The present invention provides an electromagnet device including a horizontal portion of a yoke arranged near one end portion of an iron core, a movable iron piece which pivotably supported on a leading end edge portion of a vertical portion of the yoke which serves as a fulcrum, an end portion of the movable iron piece adapted to be attracted to a magnetic pole portion by a main magnetic circuit, the magnetic pole portion is arranged in the other end portion of the iron core. The main magnetic circuit is formed by applying a voltage to a coil wound around a periphery of the iron core and an auxiliary magnetic circuit formed in parallel with the main magnetic circuit, the auxiliary circuit including a permanent magnet is arranged near the one end portion of the iron core and a magnetic resistance portion, in which a magnetic flux of the permanent magnet is magnetically saturated.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: October 6, 2015
    Assignee: OMRON Corporation
    Inventors: Toshifumi Sumino, Masaaki Yamamoto, Ichinori Sakai, Mitsuhiro Kawai, Shinichi Furusho
  • Patent number: 9053885
    Abstract: Bistable high-performance miniature relay, comprising an insulating housing having a first housing chamber (1b) with a single-phase contact assembly (4) with two current bars (8a, 8b) and a contact spring (13). The contact spring (13) being permanently connected with one leg end a current bar (8a). In a second housing chamber (1a), a bistable magnetic actuator assembly (3) with a pivotable armature (11) is placed. The contact assembly (4) and the actuator assembly (3) are located in one or two planes in the insulation material housing, the contact assembly (4) is provided with a multiplate contact spring (13) bent U-shaped to a current loop, and the actuator assembly (3) is provided with a one-part U-shaped yoke (14) with an excitation coil (17) per yoke leg and a yoke central leg (16), borne by a flat permanent magnet, supporting a rocker armature (11) formed in a slightly V-shaped.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: June 9, 2015
    Assignee: Johnson Electric Dresden GMBH
    Inventors: Jörg Gassmann, Steffen Schnitter, Marcus Herrmann, Matthias Kulke
  • Patent number: 8912871
    Abstract: An electromagnetic actuator comprising a core moving between a latched position and an open position, a permanent magnet, a coil designed to generate a first magnetic control flux to move the core from an open position to a latched position, and a second magnetic control flux designed to facilitate movement of the moving core from the latched position to the open position. The permanent magnet is positioned on the moving core so as to be at least partly outside the fixed magnetic circuit in which the first magnetic control flux flows in the open position, and to be at least partly inside the fixed magnetic circuit used for flow of a magnetic polarization flux of the magnet in the latched position.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: December 16, 2014
    Assignee: Schneider Electric Industries SAS
    Inventors: Michel Lauraire, Jean Pierre Kersusan, Bernard Loiacono
  • Patent number: 8786387
    Abstract: A magnetic actuator includes a coil bobbin that has electrical wire wound around a core. The magnetic actuator also includes a plunger located in a central portion of the magnetic actuator and configured to move within a bore located in the central portion, and at least one spring located adjacent the central portion. When electrical current is provided to the electrical wire, an electromagnetic field causes the plunger to move from a first position to a second position, and stored energy associated with the spring aids in moving the plunger to the second position. The magnetic actuator further includes a linking portion coupled to the plunger, wherein the linking portion is configured to initiate an action based on movement of the plunger.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: July 22, 2014
    Assignee: Thomas & Betts International, Inc.
    Inventors: Robert Fong, Geoffrey Reed
  • Patent number: 8760248
    Abstract: The invention relates to an electromagnetic actuator to be mounted in a haptic-feedback control device (1) for transmitting a haptic feedback to a user, wherein said actuator (5a, 5b) comprises a fixed portion (9) and a mobile portion (11), said fixed (9) and mobile (11) portions forming a magnetic circuit defining at least one air gap (e) between said fixed (9) and mobile (11) portions. According to the invention, the actuator (5a, 5b) further comprises: at least two permanent magnets (23a, 23b) respectively generating first (B1) and second (B2) opposite magnetic fields; and an electric coil (25) provided between said magnets (23a, 23b) such that the winding of said coil (25) extends successively through said first (B1) and second (B2) opposite magnetic fields so that, when a current flows through said coil (25), the actuator (5a, 5b) is submitted to a resulting actuation force in a common driving direction for translating said mobile part (11) in said air gap (e).
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: June 24, 2014
    Assignee: DAV
    Inventor: Bruno Marie
  • Patent number: 8729994
    Abstract: The invention refers to a Rotary Solenoid comprising a stator and rotor that can rotate around a rotational axis. The rotor has a rotor shaft on which a rotor disc is arranged. The rotor disc is, seen in the direction of the circumference, polarized alternating magnetically. The stator carries at least one coil. On the coil windings of electrically conducting wire are provided. For guiding the magnetic flow of the magnetic field generated by the coil a pole face consisting of several partial pole faces is provided.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: May 20, 2014
    Assignee: SVM Schultz Verwaltungs-GmbH & Co. KG
    Inventors: Winfried Willburger, Daniel Kreuzer
  • Patent number: 8729992
    Abstract: An electromagnetic actuator device has a core unit with a coil device designed to cooperate with armature units displaceably guided relative to the core unit in response to current applied to the coil device, wherein the core unit is designed to cooperate with a plurality of spatially separated plunger units of the armatures so that an electromagnetic interaction takes place with the plurality of plunger units in response to current applied to a coil of the coil device.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: May 20, 2014
    Assignee: ETO Magnetic GmbH
    Inventors: Thomas Schiepp, Oliver Thode
  • Patent number: 8704625
    Abstract: An electromagnetic energy transducer configured to convert mechanical energy into electrical energy comprises two magnetic elements including a permanent magnetic element and a soft-magnetic element and an electrical coil. The permanent magnetic element and the soft-magnetic element are arranged to form a magnetic circuit and one of the two magnetic elements is movable in relation to the other of the two magnetic elements. The electrical coil surrounds a part of the soft magnetic element. The movable magnetic element is held in a first position by a spring force and moved into a second position by applying an external mechanical force exceeding the spring force, and at the first position the magnetic flux within the soft magnetic element is different than the flux at the second position.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: April 22, 2014
    Assignee: EnOcean GmbH
    Inventor: Frank Schmidt
  • Patent number: 8692636
    Abstract: Exemplary embodiments are directed to a bistable magnetic actuator for a medium voltage circuit breaker arrangement, including at least one electrical coil for switching a ferromagnetic armature between a first limit position and a second limit position effected by an electromagnetic field, at least one permanent magnet for holding the armature in one of the two limit positions corresponding to an open and a closed electrical switching position respectively of the mechanically connected circuit breaker. The armature includes an upper plunger resting on a ferromagnetic core element of the one electrical coil for static holding the armature in the first limit position, which is attached to a plunger rod extending through the ferromagnetic core element and through the permanent magnet for mechanically coupling the actuator to the circuit breaker arrangement.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: April 8, 2014
    Assignee: ABB Technology AG
    Inventor: Christian Reuber
  • Publication number: 20140028420
    Abstract: A moving magnet actuator (MMA) includes a magnetically conductive end-ring that is spaced from a magnet pole piece. The end-ring is constructed and spaced to provide a desired counter or anti-cogging force when the MMA is in a powered state. The MMA is also constructed such that a central portion of its armature stroke is axially displaced from a radial centerline of the magnetically conductive conduit enclosing the MMA components.
    Type: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: Woodward Governor Company
    Inventor: Matthew J. Scanlon
  • Patent number: 8497754
    Abstract: The electromagnetic actuator is a linear electromagnetic actuator in which the relative position between a slide table that supports permanent magnets thereon and a guide rail that supports a coil, which is arranged in confronting relation to the permanent magnets, is displaced by means of a thrust force generated by a current flowing through the coil. The coil is disposed on the guide rail through a low coercive force magnetizable material body, the coercive force of which is lower than a predetermined value. Consequently, generation of residual magnetization can be suppressed, and an influence on the thrust force caused by such residual magnetization can also be suppressed.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: July 30, 2013
    Assignee: SMC Kabushiki Kaisha
    Inventors: Nobuhiro Fujiwara, Hisashi Yajima
  • Patent number: 8421564
    Abstract: The electromagnetic actuator is a linear electromagnetic actuator in which the relative position between a slide table that supports permanent magnets thereon and a guide rail that supports a coil, which is arranged in confronting relation to the permanent magnets, is displaced by means of a thrust force generated by a current flowing through the coil. The coil is disposed on the guide rail through a low coercive force magnetizable material body, the coercive force of which is lower than a predetermined value. Consequently, generation of residual magnetization can be suppressed, and an influence on the thrust force caused by such residual magnetization can also be suppressed.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: April 16, 2013
    Assignee: SMC Kabushiki Kaisha
    Inventors: Hisashi Yajima, Nobuhiro Fujiwara
  • Patent number: 8355524
    Abstract: A magnetic circuit includes a cylindrical yoke member having an inner circumferential surface and a collar formed at one end thereof and turned back substantially at right angles, and a plurality of permanent magnet segments of a partially circular arc in cross section. Each of the permanent magnets has an outer surface attracted magnetically to the inner circumferential surface of the cylindrical yoke member, and one end face attracted magnetically to the collar of the cylindrical yoke member. The magnetic circuit is applied to an actuator or a speaker.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: January 15, 2013
    Assignee: TDK Corporation
    Inventors: Shigeo Saitou, Mitsutoshi Tanaka, Kouji Mitake
  • Patent number: 8339225
    Abstract: An electromagnetic actuating device (1) having a housing (2) and two actuator pins (3, 4) that are supported in the housing so as to be movable independently of each other between a retracted rest position and an extended working position, and locking pins (7, 8) that hold the actuator pins in the rest position via locking mechanisms and that can be moved relative to the actuator pins in the movement direction of the actuator pins. A force is applied to the locking pins in the extension direction by further spring elements (15), and the locking pins are moved in the retraction direction by electromagnetic force application in order to unlock the locking mechanisms. The actuating device is an electromagnet (22) associated with the locking pins in common and having a reversible direction of the magnetic field, and the end sections (19) of the locking pins facing away from the actuator pins are provided with bipolar permanent magnets (20, 21) that are oriented with opposite polarities in the movement direction.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: December 25, 2012
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Andreas Nendel
  • Patent number: 8237527
    Abstract: A permanent magnetic actuator includes a flux inducing unit having a hollow space therein and formed by laminating a plurality of plates, a movable element disposed in the hollow space of the flux inducing unit to be reciprocated, permanent magnets installed at inner walls of the hollow space, and guide members located between the permanent magnets and the movable element and configured to guide reciprocating motion of the movable element.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: August 7, 2012
    Assignee: LSIS Co., Ltd.
    Inventor: Young Gyu An
  • Patent number: 8228149
    Abstract: An electromagnetic control mechanism (1) with an actuating element (15) which can move longitudinally and can be retained in three stable positions. By way of two coils (3, 4), the actuating element (15) can be switched to a first or to a second stable position, namely, the two opposed end positions. The actuating element (15) comprises an actuator rod (7) with a permanent magnet (8) arranged on the actuator rod (7), such that the actuating element (15) can be retained magnetically in the third stable position by the permanent magnet (8).
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: July 24, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Thomas Puth, Reiner Keller, Michael Pantke
  • Patent number: 8228151
    Abstract: An electromagnetic energy transducer configured to convert mechanical energy into electrical energy comprises two magnetic elements including a permanent magnetic element and a soft-magnetic element and an electrical coil. The permanent magnetic element and the soft-magnetic element are arranged to form a magnetic circuit and one of the two magnetic elements is movable in relation to the other of the two magnetic elements. The electrical coil surrounds a part of the soft magnetic element. The movable magnetic element is held in a first position by a spring force and moved into a second position by applying an external mechanical force exceeding the spring force, and at the first position the magnetic flux within the soft magnetic element is different than the flux at the second position.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: July 24, 2012
    Assignee: Enocean GmbH
    Inventor: Frank Schmidt
  • Patent number: 8212640
    Abstract: A magnetically driven tool includes a shaft having a bottom application end including a contacting surface, at least one support around a portion of the shaft for supporting components positioned outside the shaft that float with respect to the shaft. A first magnet is affixed to the shaft. An electromagnet secured to the support is positioned outside the shaft and floats with respect to the shaft above the first magnet. At least one bearing is provided for sliding the shaft in an axial direction and optionally rotating the shaft. For pushing operations, the direction of current through the electromagnet is applied so that like poles relative to the first magnet face one another to provide a repulsive force, while for pulling operations unlike poles face one another. The magnitude of the current sets a force applied by the contacting surface to a workpiece.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: July 3, 2012
    Inventor: Jerome Tuschner
  • Patent number: 8111121
    Abstract: The invention relates to an actuator comprising a leaf spring attached to a carrier in at least one point of attachment, means for providing a magnetic field and means for guiding the magnetic field so as to provide a magnetic flux loop. A movable part of the leaf spring is movable relative to the means for providing the magnetic field. The actuator further comprises a drive core attached to the movable part of the leaf spring, which is incorporated in the flux loop, for imparting the relative movement to the movable part. The drive core is so positioned that the magnetic properties of the flux loop are changed under the influence of said relative movement for gearing the magnetic force on the drive core and the spring force of the leaf spring to each other.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: February 7, 2012
    Assignee: Technische Universiteit Eindhoven
    Inventors: Roger Franciscus Mattheus Maria Hamelinck, Petrus Carolus Johannes Nicolaas Rosielle
  • Publication number: 20110248804
    Abstract: A multistable electromagnetic actuator is provided which addresses a need for a more robust, reliable and energy efficient actuation device. It comprises an armature (10) having a permanent magnet (8), wherein the armature is movable between first and second stable positions, and two electric coils (14a,14b) disposed on opposing sides of the armature along its direction of movement, with their axes substantially aligned with said direction. A magnetic flux container (2) substantially surrounds the armature and the coils to contain magnetic flux generated thereby and to shield its interior from external magnetic flux. In each stable position magnetic flux generated by the permanent magnet (8) extends around a magnetic circuit path including the container so as to retain the armature in its stable position. Energising the coils (14a,14b) causes the armature (10) to move from one stable position to the other. It is suitable for a broad range of applications, including fluid flow control for example.
    Type: Application
    Filed: December 8, 2009
    Publication date: October 13, 2011
    Applicant: CAMCON OIL LIMITED
    Inventor: Wladyslaw Wygnanski
  • Publication number: 20110214239
    Abstract: Disclosed is an actuator that realizes reciprocal rotational motion of an electric toothbrush, for example, without utilizing a drive transmission mechanism that is separate from the drive source. In the actuator, a fixed body (120) has a coil (128) that is disposed around a magnet (160) and faces the magnetic planes with different polarities within the magnet (160) at individual prescribed distances, and an outer yoke (150) that covers the outer periphery of the coil (128). The fixed body (120) rotatably supports a movable body (110), which holds the magnet (160), via a coil spring that is an elastic member (130) made from a wire. An alternating current supplying part (140) supplies an alternating current having roughly the same resonance frequency as that of the fixed body (120) to the coil (128) to cause the movable body (110) to vibrate in a reciprocal rotational motion. The coil spring that is the elastic member (130) uniformly disperses stress generated by the vibration.
    Type: Application
    Filed: November 10, 2009
    Publication date: September 8, 2011
    Inventors: Masaharu Kagami, Kazutaka Sakaguchi, Yuki Takahashi, Shigenori Inamoto
  • Publication number: 20110210809
    Abstract: A linear solenoid includes a pair of soft iron pole members which are in a spaced apart linear arrangement. A permanent magnet is attached to the end of a plunger which rides between the pole members. When a first of two electro-magnet coils is energized the plunger which is latched to one of the pole members is repelled to the opposite pole member and latched. When the second coil is energized the plunger returns to the original pole member and is latched.
    Type: Application
    Filed: April 16, 2010
    Publication date: September 1, 2011
    Inventor: Victor Nelson
  • Publication number: 20110187483
    Abstract: The invention refers to a Rotary Solenoid comprising a stator and rotor that can rotate around a rotational axis. The rotor has a rotor shaft on which a rotor disc is arranged. The rotor disc is, seen in the direction of the circumference, polarized alternating magnetically. The stator carries at least one coil. On the coil windings of electrically conducting wire are provided. For guiding the magnetic flow of the magnetic field generated by the coil a pole face consisting of several partial pole faces is provided.
    Type: Application
    Filed: December 20, 2010
    Publication date: August 4, 2011
    Inventors: Winfried WILLBURGER, Daniel Kreuzer
  • Patent number: 7982567
    Abstract: An actuator comprising: a fixed part comprising a ferromagnetic yoke and a magnetized assembly mounted on a face of the yoke and extending substantially over the whole dimension of said face parallel to the axis of movement of a moving part, the moving part comprising a ferromagnetic element comprising a first air-gap surface to form a magnetic air-gap of variable thickness and a second air-gap surface parallel to the axis of movement to form a residual magnetic air-gap of constant thickness with a corresponding air-gap surface of the magnetized assembly. an excitation coil. An electric switch apparatus equipped with the actuator.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: July 19, 2011
    Assignee: Schneider Electric Industries SAS
    Inventors: Christophe Cartier Millon, Christian Bataille, Philippe Pruvost
  • Publication number: 20110107864
    Abstract: An assembly for actuating a synchronizer includes a shift fork, a shift rail, and a permanent magnet connected to the shift rail. A first control coil is disposed in proximity to the permanent magnet. The first control coil is operable to produce a magnetomotive force on the permanent magnet in a first direction when a current is applied to the first control coil. A second control coil is disposed in proximity to the permanent magnet. The second control coil is operable to produce a magnetomotive force on the permanent magnet in a second direction when a current is applied to the second control coil. The permanent magnet is moved to a first position when the current is applied to the first control coil and the permanent magnet is moved to a second position when the current is applied to the second control coil. Movement of the magnet in turn moves the synchronizer between engaged positions.
    Type: Application
    Filed: November 9, 2009
    Publication date: May 12, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Shushan Bai, Vijay A. Neelakantan, Paul G. Otanez
  • Publication number: 20110037546
    Abstract: The invention relates to an electromagnetic actuator to be mounted in a haptic-feedback control device (1) for transmitting a haptic feedback to a user, wherein said actuator (5a, 5b) comprises a fixed portion (9) and a mobile portion (11), said fixed (9) and mobile (11) portions forming a magnetic circuit defining at least one air gap (e) between said fixed (9) and mobile (11) portions. According to the invention, the actuator (5a, 5b) further comprises: at least two permanent magnets (23a, 23b) respectively generating first (B1) and second (B2) opposite magnetic fields; and an electric coil (25) provided between said magnets (23a, 23b) such that the winding of said coil (25) extends successively through said first (B1) and second (B2) opposite magnetic fields so that, when a current flows through said coil (25), the actuator (5a, 5b) is submitted to a resulting actuation force in a common driving direction for translating said mobile part (11) in said air gap (e).
    Type: Application
    Filed: April 20, 2009
    Publication date: February 17, 2011
    Applicant: DAV
    Inventor: Bruno Marie
  • Patent number: 7843293
    Abstract: Disclosed is a magnetic drive for an electrical switch, including a linear armature (26) displaceable between two ends positions, a shunt body (27) mounted at a distance from said armature and means (24, 25, 30, 31) for generating a magnetic field. The magnetic field exerts a force on the armature (26) retaining the latter in the end positions. By joining the shunt body (27) with the armature (26), the course of the flow lines of the magnetic field are changed in such a way that the retaining force exerted on the armature (26) is reduced and the latter is displaced to the other end position, optionally by a force exerted externally on the armature (26), and retained in the position by the magnetic field. Disconnection is effected by the shunt body (27), were after being joined with the shunt body (27) the armature (26) is moved from the end position opposite the shunt body (27) to the end position facing the shunt body (26).
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: November 30, 2010
    Assignee: E.I.B.S.A.
    Inventors: Marc Bonjean, Roger Nicolaye
  • Patent number: 7817001
    Abstract: In actuating devices such as, e.g., multifunctional actuators, it is necessary in many cases to block at least one specific direction of movement. A simple and reliably operating device is proposed for this purpose, which uses an electromagnet to bring a ball from a rest position into a blocking position. In the blocking position, the ball mechanically blocks the relative movement between two parts.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: October 19, 2010
    Assignee: Preh GmbH
    Inventor: Andreas Kramlich
  • Patent number: 7710225
    Abstract: The present invention provides the actuator, which is capable of preventing biased abrasion by lowering a surface pressure at a contact portion of a movable element with a guide surface and increasing a movable range, in which a specified output force can be gained. Magnetic resistance of at least one of the surfaces (Y1, Y2) of first and second yoke parts (5, 6) corresponding to peripheral surfaces (P1, P2) of a plunger (7), on which magnetic flux acting surfaces are formed by energization, is unbalanced in the circumferential direction so as to act a resultant force of magnetic forces acting on the movable element in the radial direction eccentrically to a radial one end (E1) side.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: May 4, 2010
    Assignee: Shinano Kenshi Kabushiki Kaisha
    Inventor: Masahiko Uni
  • Patent number: 7627356
    Abstract: A multifilament high temperature superconductor with thick, striated stabilizer is disclosed, including a substrate, a buffer layer, a multifilament superconductor layer, and at least one thick stabilizer layer. Also disclosed are components incorporating superconducting tapes and methods for manufacturing same.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: December 1, 2009
    Assignee: SuperPower, Inc.
    Inventors: Xun Zhang, Venkat Selvamanickam
  • Patent number: 7623012
    Abstract: The present invention relates to an electromagnetic actuator drive (1) for adjusting an actuator drive among at least three positions, comprising a soft magnetic armature (2) which is drive-coupled to the final controlling element and has a plurality of armature faces (5, 6), a plurality of soft magnetic pole elements (7) having a plurality of pole faces (8, 9) on which the armature faces (5, 6) come to rest in two end positions of the armature (2) a restore position (10) which drives the armature (2) by spring force into a horizontal starting position, and a holding device (11) with the help of which the armature (2) can be secured in its end positions by electromagnetic forces.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: November 24, 2009
    Assignee: Mahle International GmbH
    Inventors: Jens Baumbach, Frank Beyer, Alfred Elsässer, Eberhard Kallenbach, Rainer Otto, Wolfgang Schilling, Jan Schmidt, Dietmar Türpe
  • Patent number: 7605680
    Abstract: A highly efficient electromagnetic actuator which can reduce leakage of the magnetic flux is provided. The electromagnetic actuator comprises a first coil 31, a movable body 2 adapted to move on the central axis of the first coil 31, a first stator 11 covering the top face, bottom face and outer peripheral face of the first coil 31, and a permanent magnet 15 adapted to firmly latch the movable body 2 at one end point of its movable range. A second stator 12 adapted to control the magnetic flux generated from the permanent magnet 15 is provided in succession with the first stator 11. By providing the second stator 12, when releasing the movable body 2 from its firmly latched state, the permanent magnet 15 is not inversely excited or demagnetized.
    Type: Grant
    Filed: September 7, 2005
    Date of Patent: October 20, 2009
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuhiro Matsumoto, Nobutaka Kubota, Takeshi Noda, Kazuhiro Matsuo, Kenji Kato, Mitsutaka Homma, Takao Wakabayashi
  • Patent number: 7518479
    Abstract: An inline electromagnetic tool actuator incorporates an actuator housing, an elongated armature, a tool assembly, spaced-apart return magnets, at least one drive magnet, and at least one magnet wire. The elongated armature is located inside the housing, and is adapted for reciprocating linear movement along a notional assembly axis. The tool assembly is operatively attached to the armature. The return magnets are located inside the housing, and are coaxially aligned with the armature. The return magnets have respective inward facing surfaces defining respective magnetic poles. The drive magnet is affixed to the armature, and is arranged between the return magnets. The drive magnet has opposing outward facing surfaces each of like polarity to adjacent inward facing surfaces of the return magnets. The magnet wire is coiled about the armature.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: April 14, 2009
    Inventors: Thomas Mask, Mark Evans
  • Publication number: 20090021334
    Abstract: An electromagnetic actuator comprising a fixed magnetic pole (11) applied with an electromagnetic coil (14), and a movable magnetic pole (20) provided in the insertion hole (12) of the fixed magnetic pole movably in the axial direction. The movable magnetic pole is provided with a projecting portion (22) tapered along its moving direction, a recessed taper portion (13) corresponding to the projecting taper portion of the movable magnetic pole is formed at the insertion hole of the fixed magnetic pole, and a tubular auxiliary magnetic pole (40) extending in the axial direction from the opening end of the recessed taper portion is provided continuously to the fixed magnetic pole.
    Type: Application
    Filed: April 14, 2006
    Publication date: January 22, 2009
    Applicant: SHINDENGEN MECHATRONICS CO., LTD
    Inventor: Nobuhide Okada