Armature Shape, Structure Or Material Patents (Class 335/279)
  • Patent number: 9336941
    Abstract: A multi-row coupled inductor has length, width, and height and includes a magnetic core including (1) opposing first and second plates separated from each other in the height direction, and (2) one or more pairs of coupling teeth. Each of the one or more pairs is separated from each other in the widthwise direction, and each of the one or more pairs includes a first coupling tooth and a second coupling tooth separated from and opposing each other in the lengthwise direction. The multi-row coupled inductor further includes: (1) a respective first winding wound around the first coupling tooth, and (2) a respective second winding wound around the second coupling tooth. The first winding mirrors the second winding in each of the one or more pairs, when seen looking toward the magnetic core cross-sectionally in the height direction.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: May 10, 2016
    Assignee: Volterra Semiconductor LLC
    Inventor: Alexandr Ikriannikov
  • Publication number: 20150102878
    Abstract: There is provided a high speed solenoid having enhanced response characteristics. The high speed solenoid includes: a movable shaft linearly movable in an axial direction; a movable coil unit coupled to the movable shaft; and a magnetic field forming unit forming a magnetic field in a direction perpendicular with respect to that of a current flowing in the movable coil unit, wherein when a current is applied to the movable coil unit, the movable coil unit is moved by a magnetic field formed by the magnetic field forming unit to move the movable shaft. According to the high speed solenoid, the weight of a moving part is significantly reduced, and since an electrical time constant is small, a response speed of the solenoid may be enhanced.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 16, 2015
    Inventors: Dong Kyu Shin, Jong Sung Kang, Dong Jin Cho
  • Patent number: 8994485
    Abstract: A material containing a soft magnetic substance is subjected to a plastic deformation such as a roll processing to obtain a rod-shaped body. Then, the rod-shaped body or a shaped body obtained by processing the rod-shaped body into a shape other than a flat plate shape is subjected to a heat treatment in the presence of a magnetic field. The rod-shaped body or the shaped body is made magnetic-anisotropic by the heat treatment thereby to obtain a magnetic-anisotropic plastically deformed body.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 31, 2015
    Assignee: Keihin Corporation
    Inventors: Hidehiro Hoshina, Toshiro Harakawa, Keiichi Koyama, Kohki Takahashi
  • Publication number: 20150061799
    Abstract: A solenoid assembly is provided in which electrical energy is supplied to a coil through a post that extends through an armature. The solenoid assembly includes a coil assembly having a coil, with a pole piece and an armature at least partially surrounding the coil. The armature is configured to translate relative to the pole piece when the coil is energized. The coil assembly has a bobbin at least partially surrounding the coil and a first post that extends from the bobbin. Electrical current is supplied to the coil through the first post. The armature is configured so that the first post extends through the armature. A feature is configured to prevent the armature from contacting the first post when the armature translates.
    Type: Application
    Filed: September 15, 2014
    Publication date: March 5, 2015
    Inventor: Robert A. Dayton
  • Patent number: 8939431
    Abstract: An electromagnetic positioning device has a long stretched out anchor plunger section as well as an anchor having an anchor body section axially continuing the latter, which in order to magnetically interact with a core unit and by energizing a stationary provided coil device is movably designed relative to the latter. The core unit is designed in such a way that it at least sectionally encompasses the anchor plunger section as well as the anchor body section with an expanded diameter relative to the anchor plunger section. The core unit is a multi-part design in the axial direction with a stationary core section, an axially movable core section and a variable core gap between the stationary and movable core section, and the movable core section and anchor are designed and joined together via a driver in such a way that, in response to energization, the movable core section moves, causing the core gap to close, and the driver drives the anchor in the axial direction.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: January 27, 2015
    Assignee: ETO Magnetic GmbH
    Inventors: Thomas Schiepp, Jorg Burssner
  • Patent number: 8925897
    Abstract: A solenoid valve includes a magnet armature, which is operatively connected to a sealing element of the solenoid valve in order to move the latter, and an armature opposing piece which is arranged at the end of the magnet armature. An intermediate element, which can be placed in supporting contact with the armature opposing piece, is mounted in an axially movable fashion in a guide recess in the magnet armature. A driver assistant device includes the above-described solenoid valve.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: January 6, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Norbert Alaze
  • 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: 8844900
    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.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: September 30, 2014
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Jens Hoppe, Stefan Konias, Yi Wang
  • Patent number: 8833731
    Abstract: A solenoid valve includes at least one armature that is axially displaceable in a valve housing and a valve element that is operatively connected to the armature. The valve element can be arranged by means of the armature to open up or close off at least one valve seat of the solenoid valve. A non-return valve is provided between a first fluid connection and a second fluid connection of the solenoid valve. In so doing, the non-return valve is arranged at least in regions in the armature.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: September 16, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Norbert Alaze
  • Publication number: 20140225692
    Abstract: An attraction plate structure of electromagnetic doorlock comprises an attraction plate positioned on a mounted body by a positioning assembly. The attraction surface has an arch portion higher than the bottom plane of 0.04 mm to 0.27 mm at a central region thereof, and the arch portion extends towards both ends to form an arc surface, so that a convex-curve surface is formed with both ends lower than the central region. The present invention uses the convex curve design of the attraction surface to produce the curved internal stress while the attraction plate is pulled. Due to the curved internal stress, the electric magnet under the normal current is able to enhance the tensile value of the electromagnetic doorlock, saving energy and enhancing the security access control.
    Type: Application
    Filed: January 23, 2014
    Publication date: August 14, 2014
    Inventor: YI-FAN LIAO
  • Patent number: 8791780
    Abstract: The invention relates to a hydraulic transmission valve with a magnetizable housing which is integrally configured in one piece with a pole core cone. The transmission valve according to the invention facilitates comfortably coupling in particular startup clutches, shifting clutches or synchronization clutches in a friction locking manner. Still using a transmission valve of this type is facilitated for fewer to no transmission oil changes. Furthermore a transmission valve of this type can also be used in countries with inferior transmission oil quality. The housing includes a connection. The connection defines an anchor stroke and a concentric arrangement between the pole core cone and a pole tube. Thus, the pole tube is fixated the magnetizable pole flange. An anchor that is exclusively supported in the pole tube is magnetically separated from the pole tube through a separation layer with a thickness of 0.01 mm to 0.06 mm.
    Type: Grant
    Filed: July 14, 2012
    Date of Patent: July 29, 2014
    Assignee: Hillte Germany GmbH
    Inventors: Drazen Boban, Bernd Franz, Thomas Jacob, Andreas Knecht, Dieter Maisch, Hartmut Weber
  • Patent number: 8757586
    Abstract: A solenoid arrangement comprises a pole tube which is axially subdivided into a pole core section, a transition section, and a tube section. A magnetic flux between the pole core section and the tube section is interrupted by the transition section. An armature is movably guided in the pole tube and has, at its end facing the pole core section, a flange which axially projects from an end face. According to the invention, the pole core section has a stepped depression into which the armature can plunge and which, starting from the transition section, is subdivided into an annular collar, a shoulder, and a notch which is set back axially and radially. An axial dimension of the collar exceeds an axial dimension of the flange.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: June 24, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Gruen, Horst Bartel, Roland Schempp, Klemens Strauss
  • Patent number: 8754731
    Abstract: A solenoid for a vehicle starter includes at least one coil with a passage extending through the coil in an axial direction. The solenoid further includes a plunger configured to move in the axial direction within the passage. The plunger includes a cylindrical outer surface with a substantially uniform diameter and a circumferential notch. The cylindrical outer surface includes a first portion with a first diameter on one side of the circumferential notch, and a second portion with the first diameter on an opposite side of the circumferential notch. The circumferential notch includes a portion with a second diameter that is less than the first diameter.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 17, 2014
    Assignee: Remy Technologies LLC
    Inventors: Stephen P. Santichen, Michael D. Bradfield
  • Patent number: 8740178
    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.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: June 3, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Karl, Massimiliano Ambrosi, Nicolas Houis, Jens Norberg, Stephan Steingass, Elmar Vier, Andreas Lechler, Gerhard Stokmaier
  • Patent number: 8736409
    Abstract: A solenoid for an electromagnetic valve, which reduces a magnetic resistance resulting from a space between a movable iron core and a magnetic plate. A magnetic plate provided around a movable iron core forming a magnetic path between a magnetic frame and the movable iron core includes an extending portion extending toward a stationary iron core along a surface of the movable iron core. An area Sa of an opposing portion of an outer periphery of the movable iron core opposing an inner peripheral surface of the magnetic plate and a sectional area Sb of the movable iron core satisfy K=Sa/Sb, K>1. An axial length h of the inner peripheral surface of the magnetic plate and a length L from an attracting-force acting surface of the movable iron core located at a position separate from the stationary iron core to a front end portion of the magnetic plate satisfy 2?K?[value of K when h=L].
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: May 27, 2014
    Assignee: SMC Corporation
    Inventors: Minehiko Mita, Jiro Karasaki
  • 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: 8729984
    Abstract: Systems and methods provide a magnetic actuator having more than one air gap. After the trip unit is triggered, a first armature is accelerated to quickly close a first air gap and then mate with a second armature. The first and second armature then move toward a core to close a second air gap and reach the final combined armature position, causing a contact to open. A faster reaction time is provided, yet without increasing the number of turns of the trip coil winding, and provides a more efficient actuator.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: May 20, 2014
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Willy Feller, Beat Villiger
  • Patent number: 8678343
    Abstract: An armature-stator structure (45) includes a stator (56) having a magnetic housing (57) of generally U-shaped cross-section. The housing includes an open end (58) in communication with an interior portion (60). A coil (94) is associated with the stator and to be energized to generate a magnetic field. An armature (46) has a generally ring-shaped base (48) and a generally rod-shaped stem portion (50) extending transversely from the base such that the base and stem portion define a generally T-shaped cross-section. The base is able to be received in the opened end of the housing with the stem portion extending into the interior portion. The armature moves with respect to the stator from a first position to a second position in response to the generated magnetic field. The stator and armature are configured such that a force on the armature decreases as a portion of the armature moves further into the interior portion of the body of the stator, towards the second position.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: March 25, 2014
    Assignee: Continental Automotive Systems, Inc.
    Inventors: Perry Robert Czimmek, Michael J. Hornby
  • Patent number: 8678140
    Abstract: An elevator door assembly (20) includes an electromagnet (30) use as part of a door coupler for coupling elevator car doors (24) to elevator hoistway doors (26). A disclosed example includes an electromagnet core (40) with a gap (50) in one of four sides of the core. The gap (50) directs and concentrates magnetic flux of the electromagnet (30) to concentrate an attractive force for coupling the electromagnet (30) with a vane (32). Disclosed examples includes unique geometric and dimensional relationships to achieve a desired goodness factor.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: March 25, 2014
    Assignee: Otis Elevator Company
    Inventors: Jacek F. Gieras, Sastry V. Vedula, Pei-Yuan Peng, Bryan Robert Siewert
  • Patent number: 8641011
    Abstract: A solenoid comprises at least one armature supported in an armature space. The armature space is encircled by a coil carrying a number of windings which can be loaded with current. The magnetic field generated by it moves the armature against the core. The armature acts on a pin. The armature has on its front seen in the direction of movement a recess in which a structural part is set. The pin is supported on the structural part.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: February 4, 2014
    Assignee: SVM Schultz Verwaltungs—GmbH & Co. KG
    Inventors: Georg J. Scherer, Helmut J. Mang
  • Patent number: 8613603
    Abstract: An armature for a solenoid actuator is disclosed. The armature comprises a first face comprising a recess suitable for receiving a biasing spring in use of the armature; a second face opposite the first face; and fluid communication passages for providing a fluid flow path through the armature between the recess and the second face in use of the armature. The first face is uninterrupted by the fluid communication passages. The invention reduces the risk of cavitation damage during operation of the actuator. In one application, the actuator is used in a fluid pump for a selective catalytic reduction system.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: December 24, 2013
    Assignee: Delphi International Operations Luxembourg, S.A.R.L.
    Inventor: Michael Peter Cooke
  • Patent number: 8570124
    Abstract: A starting switch structure including a body, plunger piston movable in the body, wherein the plunger piston has a first accommodating portion at an end of the plunger piston for accommodating an end of a guide pin moving reciprocally, the accommodating portion has a butting portion at the bottom surface, an excitation portion wound around the end of the plunger piston, and a butting part at an open end of the accommodating portion of the plunger piston, wherein a contact point is led to electrically connect the first terminal to the second in case that the plunger piston and the guide pin move in a first direction when the excitation portion excites, while a broken circuit is led between the first terminal and the second terminal in case the plunger piston and guide pin move in a second direction after the excitation portion has finished exciting.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: October 29, 2013
    Assignee: Unipoint Electric Mfg. Co., Ltd.
    Inventor: Mu-Hsien Lee
  • Patent number: 8556231
    Abstract: A vertical rotor type gas solenoid valve comprises a valve case (14), a regulating spring (11), a regulating nail (10), a rotor regulating screw (9), a regulating screw bracket (12), a swing arm (18), a sealing gasket component arranged at an outer end of the swing arm (18), and a vertical rotor type electromagnet. The valve case (14) comprises a gas net (15), a gas outlet (16) and a valve port (17). The gas flow and the curve of the gas flow against the electric current of the winding can be regulated, and the minimum starting point of gas flow is determined.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: October 15, 2013
    Inventor: Zhaokeng Pan
  • 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: 8480055
    Abstract: The invention relates to a solenoid wherein a magnetic discontinuity is formed in the pole tube reducing the effective material thickness, such as by reducing the thickness, particularly the wall thickness of the magnetically active material, the front face of the armature facing the pole core and a bottom face in the interior of the pole tube at the pole core each have a contour allowing mutual axial overlapping. This enables advantageous influencing of the force-stroke characteristic curve of the solenoid with low production effort.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: July 9, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Klemens Strauss, Juergen Gruen, Horst Bartel, Roland Schempp
  • Patent number: 8432242
    Abstract: Embodiments of soft latching solenoids comprise a coil assembly (24); a plunger assembly (26); at least one flux conductor (28) comprising a flux circuit. The coil assembly (24) is fixedly situated with respect to a solenoid frame (21). The plunger assembly (26) is configured to linearly translate in a first direction along a plunger axis (32) upon application of a pulse of power to the coil assembly (24). The flux conductor(s) (28) is/are positioned radially exteriorly to the plunger assembly (26) to form the flux circuit. The flux circuit comprises the solenoid frame (21), the plunger assembly (26), and the at least one flux conductor (28). The flux circuit is arranged and configured so that the plunger assembly (26) is held in a plunger detent position upon cessation of the pulse of power.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: April 30, 2013
    Assignee: Saia-Burgess, Inc.
    Inventor: James C. Irwin
  • 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: 8421568
    Abstract: A solenoid arrangement having an armature member that is segmented to help minimize the radial force due to eccentricity of the armature member. The solenoid arrangement has a magnetic coil that when energized will create magnetic flux in the flux path. A pole piece is partly circumscribed by the armature member. Inner and outer air gaps are located about the armature member. Eccentricity of the armature member results in a decrease in one of the air gaps and a corresponding increase in the other. Radial gaps segment the armature member to interrupt the circumferential flux path about the armature member to inhibit magnetic flux from swirling to the side nearest the pole piece and to distribute magnetic flux substantially evenly. The radial force acting on the armature member is reduced resulting in reduced friction between solenoid components while substantially preserving the desirable level of axial force.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: April 16, 2013
    Assignee: BorgWarner Inc.
    Inventor: Daniel L Deland
  • Patent number: 8421567
    Abstract: A method is disclosed for producing a pole face of a metal closing elements of a solenoid, especially for electromechanical switchgear. In at least one embodiment, the method includes machining the surface of a crude stamped part of the closing element to give the pole face. A corresponding armature, yoke, solenoid and switchgear are also disclosed.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: April 16, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Peter Eckl, Johann Hofrichter
  • Patent number: 8421565
    Abstract: A solenoid for a vehicle starter includes at least one coil with a passage extending through the coil. A plunger is slideably positioned within the passage and configured to move in an axial direction between a first position and a second position. The plunger includes a substantially cylindrical outer surface portion with a circumferential notch formed in the outer surface portion. The at least one coil may include a pull-in coil and a hold-in coil wound on a spool. A plate member is positioned at one end of the spool and is separated from the plunger by a radial distance. The radial distance varies when the plunger moves in the axial direction as a result of the notch moving in relation to the plate member. A sleeve member may be coupled to the plunger such that the sleeve member covers the circumferential notch formed in the plunger.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: April 16, 2013
    Assignee: Remy Technologies LLC
    Inventors: Stephen P. Santichen, Michael D. Bradfield
  • Patent number: 8416041
    Abstract: A solenoid may include a core having a junction surface; a plunger having a junction surface and located adjacent to the core; a shading ring located proximate to an interface between the core junction surface and the plunger junction surface, the shading ring having an outside diameter slightly smaller than the diameter of the core, and operable to produce a concentration of magnetic attraction within an annular range of the interface between a center of the interface and a location of the shading ring; wherein a contact region between the core junction surface and the plunger junction surface is substantially smaller than the respective junction surfaces and located proximate to the annular range of the concentration of magnetic attraction.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: April 9, 2013
    Inventor: Anthony Freakes
  • Patent number: 8395466
    Abstract: A bionic telescopic matrix unit is disclosed, which is composed of a slide shaft (6), a metal guide pipe (7), an elastic telescopic shell (2) and an electromagnetic coil (3). In the elastic telescopic shell (2), the slide shaft (6) made of a permanent magnet extends into the metal guide pipe (7) via the front end of said pipe (7) and comes into sliding contact with the inner tube wall of the metal guide pipe (7). The rear end of the metal guide pipe (7) and the front end of the slide shaft (6) protrude out through the front and back openings respectively of said elastic telescopic shell (2), said front and back openings of said elastic telescopic shell (2) being fixedly connected to the outer peripheral wall of the metal guide pipe (7) and to the slide shaft (6) respectively, thus connecting the metal guide pipe (7) with the slide shaft (6).
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: March 12, 2013
    Inventor: Dezheng Zhao
  • Patent number: 8368493
    Abstract: A plunger main body is fixed to a shaft to reciprocate together with the shaft in an axial direction within a predetermined range. An axial overlapped surface area between a rear stator main body and the plunger main body is reduced when the plunger main body is moved from a rear stator main body side toward a front stator main body side. A plunger projection radially outwardly projects from an outer peripheral wall of an end portion of the plunger main body, which is axially located on the rear stator main body side.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: February 5, 2013
    Assignee: Denso Corporation
    Inventor: Yoshiyuki Murao
  • Patent number: 8354908
    Abstract: The present invention provides a cylindrical magnetic levitation stage which includes a cylindrical substrate used to form micro-patterns of various arbitrary shapes on a large-area semiconductor substrate or display panel substrate, a cylindrical substrate, a combination of a first permanent magnet array and a first coil array and a combination of a first permanent magnet array and a first coil array, which are coupled to the cylindrical substrate, so that levitation, axial translation and rotation of the cylindrical substrate can be made finely through the control of a magnetic force generated by the interaction between a magnetic field generated by electric current applied to the coil arrays and a magnetic field generated from the permanent magnet arrays corresponding to the coil arrays.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: January 15, 2013
    Assignee: Korea Electrotechnology Research Institute
    Inventors: Jeong Woo Jeon, Hyun Seok Oh, Sung Il Chung, Yeon Ho Jeong, Do Hyun Kang, S. A. Nikiforov, Mitica Caraiani
  • Patent number: 8350652
    Abstract: An electromagnetic actuating unit for a hydraulic directional control valve and a method for the assembly thereof. The actuating unit has a coil for generating a magnetic field, a yoke unit with a yoke and a yoke plate, and a pole core unit with a pole core and a housing for conducting a magnetic flux, and an armature unit which is arranged in the magnetic field of the coil and has an armature and a pressure pin as an actuator. The armature unit can be displaced in the direction of the longitudinal axis thereof in a first bearing point in the yoke unit and in a second bearing point in the pole core unit. At least one of the hearing points can be displaced in the radial direction during assembly of the actuating unit and can be fixed after a coaxial orientation of both bearing points.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: January 8, 2013
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Jens Hoppe, Stefan Konias
  • Patent number: 8269589
    Abstract: An electromagnetic drive unit is disclosed, including a yoke and a movable armature. In at least one embodiment, the yoke and the armature have a matched shape so that, when the electromagnetic drive unit is activated, the armature is adapted to at least partially cross the yoke. An electromechanical switching device is also disclosed.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: September 18, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Josef Burger, Reinhard Maier, Bernd Trautmann
  • Patent number: 8249674
    Abstract: An exemplary portable electronic device includes a main body, a cover member movably connected with the main body, a sensing unit, a signal processing unit, an audio output unit. The audio output unit is configured for outputting audio signals and disposed in either one of the main body and the cover member. The audio output unit includes a magnetic member. The sensing unit is disposed in the other one of the main body and the cover member and configured for detecting relative displacement of the magnetic member and capable of generating a corresponding command signal. The signal processing unit is disposed in the main body and electrically connected to the sensing unit. The signal processing unit is capable of actuating different operation modes according to the command signal.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: August 21, 2012
    Assignee: Chi Mei Communication Systems, Inc.
    Inventor: Jui-Hsiang Lin
  • Patent number: 8248195
    Abstract: A flat electromagnetic actuator includes a solenoid, a shaft at the center thereof, first and second bearings, a projecting supporting part, a movable core having an annular projection, a cylindrical yoke, a coil bobbin, a coil and a cylindrical housing whose top is closed, wherein an axial dimension thereof is shorter than a radial dimension thereof, and wherein the second bearing, the projecting supporting part, the movable core, the annular projection, the cylindrical yoke, the coil bobbin, and the housing are disposed on a same surface perpendicular to a displacement direction of the shaft, and continuously provided in the radial direction.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: August 21, 2012
    Assignee: Keihin Corporation
    Inventors: Shigeto Ryuen, Kenji Suda
  • Patent number: 8237526
    Abstract: Apparatus for inductive braking of a projectile are disclosed. Embodiments include a receiver that has a unidirectional conductor having a closed conductive pathway that encircles a passageway for a moving projectile. The unidirectional conductor permits current to flow through it in substantially only one direction around the passageway. As the projectile and its associated magnetic field move past the unidirectional conductor, the moving magnetic field induces a current flow through the closed conductive pathway, which in turn generates a magnetic field behind the projectile having the same polarity as the projectile's field. The two fields attract one another, which both exerts a braking force on the projectile and tends to align the two fields. Alignment of these fields centers the projectile away from the passageway wall.
    Type: Grant
    Filed: June 9, 2009
    Date of Patent: August 7, 2012
    Assignee: Sierra Lobo, Inc.
    Inventors: Philip Travis Putman, Kamel Salama
  • 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: 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: 8149077
    Abstract: An electromagnetic operating device for a switch comprises a fixed yoke (1) formed by laminating square yokes and an E-shaped yoke integrally while holding the E-shaped yoke in-between, a permanent magnet (5), a moving member (2) capable of linear movement in the fixed yoke by a predetermined distance, a rod (3) coupled with the moving member and penetrating the fixed yoke to project outward from opposite sides, and a drive coil (4) disposed in the fixed yoke, the moving member moving on the inside of the fixed yoke when a current is supplied through the drive coils, wherein the fixed yoke (1) is provided with a plurality of holes (1c) penetrating in the laminating direction of magnetic steel sheets, pins (6) each having a diameter slightly smaller than that of the plurality of holes and provided with a threaded portion (6a) at the end are inserted to penetrate two or more of the plurality of holes, and the laminated fixed yoke is fastened using the threaded portions of the pins.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: April 3, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomotaka Yano, Masahiro Arioka
  • Patent number: 8143984
    Abstract: A linear solenoid has a first magnetic pulling portion for attracting a forward end of a plunger in a forward direction. The linear solenoid further has a second magnetic pulling portion at a rear end of the solenoid. A magnetic path portion is formed at the rear end of the solenoid and composed of a constant overlapping area and a temporal overlapping area. A plunger side-gap portion is formed at a rear end of the plunger so as to face to the overlapping areas in a radial direction. A first radial gap, which is formed between the constant overlapping area and the plunger side-gap portion, is made larger than a second radial gap, which is formed between the temporal overlapping area and the plunger side-gap portion.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: March 27, 2012
    Assignee: Denso Corporation
    Inventor: Kanehisa Nagasaki
  • Patent number: 8138870
    Abstract: A solenoid with a coil which can be current-fed, the resulting magnetic field moving an armature. The armature acts, if necessary, on an actuator. Furthermore, the solenoid has at least one pyrotechnic actuation for the armature or the actuator.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: March 20, 2012
    Assignee: SVM Schultz Verwaltungs-GmbH & Co. KG
    Inventors: Claus-Peter J. Hasel, Florian J. Rauch, Peter J. Tappe
  • Patent number: 8120454
    Abstract: An electromagnetic actuating device comprising an armature unit which can be moved along a longitudinal axis relative to a stationary core by passing a current through a coil device, said armature unit being designed to form or define a fluid flow channel, wherein the armature unit has at one end an axially elongate cylindrical section, to which an annular groove-shaped section of reduced outer diameter is connected in the direction of the longitudinal axis, wherein the fluid flow channel extends into the annular groove-shaped section, wherein the fluid flow channel runs through the elongate cylindrical section in the manner of a through-channel, in particular a through-bore, running obliquely with respect to the longitudinal axis, so that a first opening at the end side and/or an opposite second opening of the through-channel are provided outside the cylindrical outer wall of the elongate section.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: February 21, 2012
    Assignee: ETO Magnetic GmbH
    Inventor: Roland Stehle
  • Patent number: 8109487
    Abstract: A linear solenoid device comprising an energizable coil; a movable core; a first fixed core as a magnetic member having a recess capable of accommodating one end of the movable core; a second fixed core as a magnetic member having an inner peripheral surface slidably supporting the movable core; and an annular non-magnetic member coaxially connecting the first fixed core and the second fixed core to each other, wherein the linear solenoid device is capable of being driven by an attraction force applied to the movable core towards the first fixed core upon energization of the coil, and the non-magnetic member is formed so that an inner peripheral surface of the non-magnetic member functions together with the inner peripheral surface of the second fixed core as a sliding surface along which the movable core is slidable.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: February 7, 2012
    Assignee: Aisin AW Co., Ltd.
    Inventors: Takahiro Kokubu, Masaya Nakai
  • Publication number: 20110309901
    Abstract: An electromagnetic actuating device comprising an armature unit which can be moved along a longitudinal axis relative to a stationary core by passing a current through a coil device, said armature unit being designed to form or define a fluid flow channel, wherein the armature unit has at one end an axially elongate cylindrical section, to which an annular groove-shaped section of reduced outer diameter is connected in the direction of the longitudinal axis, wherein the fluid flow channel extends into the annular groove-shaped section, wherein the fluid flow channel runs through the elongate cylindrical section in the manner of a through-channel, in particular a through-bore, running obliquely with respect to the longitudinal axis, so that a first opening at the end side and/or an opposite second opening of the through-channel are provided outside the cylindrical outer wall of the elongate section.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 22, 2011
    Applicant: ETO MAGNETIC GMBH
    Inventor: Roland Stehle
  • Patent number: 8079568
    Abstract: A valve is described having an inlet, an outlet, a sealing element and a device to generate a magnetic field, whereby the sealing element can be moved at least partially by the device and whereby the sealing element connects the inlet to the outlet in a fluid-conducting manner in that the sealing element lifts off at least partially from a valve seat wherein the sealing element is made at least partially of a foam element that can be deformed by the magnetic field.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: December 20, 2011
    Assignee: Carl Freudenberg KG
    Inventors: Ralf Heinrich, Torsten Gerlich, Christoph Gund, Klaus Bickel
  • Publication number: 20110285485
    Abstract: A solenoid arrangement having an armature member that is segmented to help minimize the radial force due to eccentricity of the armature member. The solenoid arrangement has a magnetic coil that when energized will create magnetic flux in the flux path. A pole piece is partly circumscribed by the armature member. Inner and outer air gaps are located about the armature member. Eccentricity of the armature member results in a decrease in one of the air gaps and a corresponding increase in the other. Radial gaps segment the armature member to interrupt the circumferential flux path about the armature member to inhibit magnetic flux from swirling to the side nearest the pole piece and to distribute magnetic flux substantially evenly. The radial force acting on the armature member is reduced resulting in reduced friction between solenoid components while substantially preserving the desirable level of axial force.
    Type: Application
    Filed: January 20, 2010
    Publication date: November 24, 2011
    Applicant: BorgWarner Inc.
    Inventor: Daniel L. Deland
  • Patent number: 8063726
    Abstract: An electromagnetic actuating device comprising an armature unit which can be moved along a longitudinal axis relative to a stationary core by passing a current through a coil device, said armature unit being designed to form or define a fluid flow channel, wherein the armature unit has at one end an axially elongate cylindrical section, to which an annular groove-shaped section of reduced outer diameter is connected in the direction of the longitudinal axis, wherein the fluid flow channel extends into the annular groove-shaped section, wherein the fluid flow channel runs through the elongate cylindrical section in the manner of a through-channel, in particular a through-bore, running obliquely with respect to the longitudinal axis, so that a first opening at the end side and/or an opposite second opening of the through-channel are provided outside the cylindrical outer wall of the elongate section.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: November 22, 2011
    Assignee: ETO Magnetic GmbH
    Inventor: Roland Stehle