Core Or Pole Shape, Structure Or Material Patents (Class 335/281)
  • Patent number: 8410879
    Abstract: The invention refers to a solenoid with a magnet body connected with a tube pipe, wherein means for fastening the magnet body to the tube pipe are provided, and the means have at least one electrically conductive element, which is in contact, on the one hand, with the tube pipe, on the other hand, with the magnet body, for electric connection of tube pipe and magnet body.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: April 2, 2013
    Assignee: SVM Schultz Verwaltungs-GmbH & Co. KG
    Inventor: Hans-Kersten J. Lesk
  • Patent number: 8405478
    Abstract: A magnetic core including (i) a first magnetic material having a first magnetic permeability to substantially provide a core body of the magnetic core, and (ii) a second magnetic material having a substantially triangular structure positioned in a corner region of the core body. The corner region is defined by a region of the core body where a first portion of the core body coincides with a second portion of the core body in a manner that is substantially perpendicular. The second magnetic material is used to substantially evenly distribute magnetic flux in the magnetic core, and the second magnetic material has a second magnetic permeability that is lower than the first magnetic permeability.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: March 26, 2013
    Assignee: Marvell International Ltd.
    Inventor: George Shengshi Dai
  • 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: 8344837
    Abstract: In a solenoid apparatus, first and second cylindrical holding parts respectively have first and second opening parts. One flange part is provided with first and second notch portions. In an exciting coil, one line end portion is held by the first cylindrical holding part, and is bent immediately after the one line end portion is pulled from the first notch portion to the inside of the flange part. A line member is wound around a winding drum part toward the other side in the circumferential direction opposed to the opening direction of the first opening part and is wound a predetermined number of turns. Thereafter, the other line end portion is bent in the axial direction immediately in front of the second notch portion and is pulled out from the second notch portion to the outside of the flange part, and is then held by the second cylindrical holding part.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: January 1, 2013
    Assignee: Denso Corporation
    Inventors: Masami Niimi, Kouji Katahira, Masaki Akiyama
  • Patent number: 8344831
    Abstract: A magnetic yoke having a yoke core that has a magnet, on which a first yoke arm and a second yoke arm are developed in such a way that the magnet and the two yoke arms open up a yoke opening, and having a first pair of pole pieces, which extend into the yoke opening and are positioned at a distance to each other in a first direction in such a way that a first gap is developed between the first pair of pole pieces and having a second pair of pole pieces, which extend into the yoke opening and are positioned in a second direction, that is aligned perpendicular to the first direction, at a distance from each other in such a way that a second gap is developed between the second pair of pole pieces. A micromechanical component having such a magnetic yoke is also described. A method for producing a magnetic yoke and a micromechanical component is also described.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: January 1, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Stefan Pinter, Joerg Muchow, Juergen Kober
  • 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: 8264313
    Abstract: A guide of a coil device has a tongue portion, which is formed by resin integrally with the guide at a location radially outward of a slit of a yoke and axially extends toward an opening part of the yoke such that a distal end part of the tongue portion is resiliently bendable while exerting a resilient force. The tongue portion is resiliently engaged with a flange portion of a stator core upon filling of the coil device to the stator core.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: September 11, 2012
    Assignee: Denso Corporation
    Inventors: Kazuhiro Sasao, Akinori Hirano
  • 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: 8205857
    Abstract: A pressure regulating valve (10) includes a magnet coil (16) received in a coil body (18), an armature (26) movable relative to a pole piece (20) for actuating a valve closing member (36), and a magnetic circuit (48) containing a magnet yoke (50). The magnetic circuit (48) has a maximum of three components (20, 66; 26, 50) that together form magnetic transitions (72, 74) oriented in the axial direction.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: June 26, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Werner Schmid, Klaus Schudt, Lothar Krauter, Guenther Krehl, Christof Ott
  • Patent number: 8203405
    Abstract: An electromagnetic actuating apparatus with an elongate actuating element (3), which forms an engagement region (11) at the end and is capable of moving owing to the force of a coil device provided in stationary fashion, and sections of the actuating element have permanent magnets (4), which are designed to interact with a stationary core region (7), wherein a stationary bearing element (8) acting as a yoke is provided axially opposite the core region (7) for the actuating element (3), at least sections of which are in the form of a piston, wherein the actuating element (3) has two sections (10, 20; 3a, 3b), wherein a first section (19, 3a), which is arranged in the region of the permanent magnets (4), is optimized in terms of the magnetic conductivity and a second section (20, 3b), which is arranged in the engagement region, is optimized in terms of wear.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: June 19, 2012
    Assignee: ETO Magnetic GmbH
    Inventors: Thomas Golz, Achim Riedle, Uwe Wagner
  • 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: 8138871
    Abstract: A pole tube of a solenoid actuator including a non-magnetic intermediate piece having a first intermediate end face and a second intermediate end face, a pole piece having a pole end face configured to join the first intermediate end face at a first joining region, and a tube piece having a tube end face configured to join the second intermediate end face at a second joining region. At least two of the intermediate piece, the pole piece and the tube piece are configured to be connectable to each other using electric fusion. At least two of the intermediate piece, the pole piece and the tube piece have a different conductivity. A respective part of the pole and tube pieces disposed in corresponding first and second joining regions are configured to each have an electrical resistance substantially equal to an electrical resistance of a part of the intermediate piece.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: March 20, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Gruen, Christoph Giegerich, Roland Schempp
  • Patent number: 8138872
    Abstract: A contact device has a first yoke having a substantially U-shape, a second yoke bridged over both ends of the first yoke, a spool wound with a coil disposed between the first yoke and the second yoke, a movable iron core inserted into a center hole of the spool in a reciprocating mariner, and a contact mechanism unit formed above the second yoke driven with a drive shaft having a lower end fixed to the movable iron core, which reciprocates based on excitation and demagnetization of the coil, and an upper end projecting out from an upper surface of the second yoke. An insertion hole communicating to the center hole of the spool and through which the movable iron core reciprocates is formed in the first yoke. An annular auxiliary yoke including an insertion hole communicating to the insertion hole of the first yoke and through which the movable iron core reciprocates is provided at a lower surface of the first yoke.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: March 20, 2012
    Assignee: OMRON Corporation
    Inventors: Ikuhiro Yoshihara, Kazuchika Hiroki
  • Patent number: 8134439
    Abstract: A solenoid, in particular for switching pressure controllers or pressure valves, including an armature movable in an armature space, and a coil which can be impinged by current. When the coil is impinged by current, a magnetic field is generated serving for moving the armature, and the armature space can be filled with oil. For de-airing the armature space at least one de-airing channel is provided. In the de-airing channel at least one backflow-preventing element is provided which is permeable in the direction of de-airing.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: March 13, 2012
    Assignee: Dipl-Ing. Wolfgang E. Schultz
    Inventors: Georg J. Scherer, Helmut J. Mang
  • Publication number: 20120038439
    Abstract: A laminate stack having individual soft magnetic sheets. The individual sheets are involutely curved in the laminate stack. Each individual sheet has a first long side, a second long side opposite the first long side, a first short side and a second short side opposite the first short side. The first long side has a recess, said recess being rectangular and equidistant from the first short side, the second short side and the second long side when the individual sheet is in its uncurved state.
    Type: Application
    Filed: August 26, 2010
    Publication date: February 16, 2012
    Applicant: Vacuumschmelze GmbH & Co., KG
    Inventors: Joachim Gerster, Herbert Hoehn
  • 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
  • Patent number: 8111122
    Abstract: A powdered metal electromagnetic is provided that has much less variance between units, increased frictional drag, reduced wear of itself and the brake drum disk during use and an increased resistance to moisture due to the use of a donor material that increases performance and reliability. In addition it can withstand much higher surface speeds while producing higher frictional drag.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: February 7, 2012
    Assignee: Cequent Performance Products, Inc.
    Inventor: William E. Richeson
  • Patent number: 8093977
    Abstract: The invention relates to a magnet assembly for a magnet valve. The assembly has an inner pole and an outer pole as well as a coil. The coil is arranged between the inner pole and the outer pole and the coil wound directly onto the inner pole. According to the invention, the magnet assembly is used for actuating a closing element in a magnet valve.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: January 10, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Hubert Greif, Timo Haegele, Stefan Plueschke
  • Patent number: 8061685
    Abstract: A solenoid valve includes a tubular coil bobbin 12 having a coil 13 wound around the outer peripheral surface thereof, a core 8 arranged inside the coil bobbin 12, a yoke 7 for fixing the core 8, a plunger 10 having a central axis coaxial to that of the core 8 and being movable in the axial direction, and a valve housing 5 having ports 3, 4, wherein the yoke 7 is provided, in the outer surface thereof, with a fitting hole 7d projecting tubularly for receiving and fixing the core 8 inserted therein and securing it in place, and the core 8 is provided with a projection 8a to be inserted into the fitting hole 7d and a flange 8b to abut against the inner surface of the yoke 7.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: November 22, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masatoshi Ueda, Tatsuya Matsumoto
  • Patent number: 8026782
    Abstract: A magnet system for an electrical actuator includes a substantially U-shaped magnet yoke having substantially parallel first and second pole legs connected by a yoke web. The first pole leg has a longitudinal end section bent out of a plane of the first pole leg. A longitudinal side of the longitudinal end section forms a first magnet pole. The second pole leg has an end face forming a second magnet pole.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: September 27, 2011
    Assignee: Tyco Electronics Austria GmbH
    Inventor: Rudolf Mikl
  • 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
  • Patent number: 7978035
    Abstract: A magnet switch which may be employed in automotive engine starters is provided. The magnet switch includes a stationary magnetic core made up of a disc assembly and a core body. The disc assembly is made of a stack of annular plate members superposed on each other. Each of the plate members has an opening through which a terminal lead of a magnetic coil extends. The core body has a boss with an edge which is plastically deformed outwardly in the radius direction thereof or staked to create an elastic nip which retains the stack of the plate members firmly on the core body. This structure ensures the joint between the disc assembly and the core body to withstand mechanical impact exerted on the magnetic core and stability in operation of the magnet switch without increasing a total production cost of the magnetic switch.
    Type: Grant
    Filed: July 30, 2008
    Date of Patent: July 12, 2011
    Assignee: Denso Corporation
    Inventors: Shinji Usami, Tomohiro Teramachi
  • Patent number: 7978038
    Abstract: The invention relates to an electromagnetic actuator with variable reluctance comprising a fixed ferromagnetic armature (3) comprising at least two concentric cylinders of revolution linked by a ring nut, at least one magnetizing winding (2) arranged between said cylinders, a ferromagnetic moving armature (4) guided in reciprocating translation movements relative to said fixed armature (3), with which it defines a magnetic circuit with an air gap (20), the dimension of which varies during reciprocating translation movements of the moving armature (4), wherein said fixed armature (3) comprises at least two series of slots, a first series of slots provided radially in said outer cylinder and extending over the entire height of said outer cylinder, and a second series of slots provided radially in said outer and inner cylinders and extending only over a major part of the height of said cylinders.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: July 12, 2011
    Assignee: Centre National d'Etudes Spatiales (C.N.E.S.)
    Inventors: Jean-Claude Vannier, Francois Dugue, Francois Roux, Isabelle Gibek, Denis Schwander
  • Patent number: 7975982
    Abstract: In an electromagnetic valve, a stator assembly includes an electrically energizable coil and a thin-walled core which receives and reciprocally supports an armature. The thin-walled core has a closed end and an open end, the open end being in fluid communication with a fluid flow passage within a valve member. The valve member reciprocates with the armature to control flow rate in the flow passage. A flange integral with the thin-walled core extends about the open end. A washer receives the thin-walled core and abuts the flange. The flange and the washer are received in a recess in the valve body and are permanently and sealingly fixed therein by a swaged joint in the valve body.
    Type: Grant
    Filed: September 3, 2008
    Date of Patent: July 12, 2011
    Assignee: Defond Components Limited
    Inventors: Chi Wai Chan, Keung Chau
  • Patent number: 7973627
    Abstract: A solenoid actuator (1) attached to a hydraulic equipment comprises a shaft (5) connected to the hydraulic equipment, a plunger (4) fixed to the shaft (5), a coil (12) which magnetically drives the plunger (4), and a first bearing (7) and a second bearing (8) supporting the shaft (5) on both sides of the plunger (4). A plunger front chamber (74) is formed between the first bearing (7) and the plunger (4), a plunger rear chamber (75) is formed between the plunger (4) and the second bearing (8), and a second bearing rear chamber (76) is formed on the opposite side of the second bearing (8) to the plunger rear chamber (75). To secure an oil flow between these chambers, a plunger exterior oil passage (63), a second bearing oil passage (64), and a shaft-penetrating oil passage (65) are provided, thereby realizing a preferable balance between oil pressures acting on the second bearing (8).
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: July 5, 2011
    Assignee: Kayaba Industry Co., Ltd.
    Inventors: Hideki Yamagata, Mamoru Hosogai, Hideki Tsuchiya, Yoshiharu Miya, Tomoyuki Fujita, Koichiro Akatsuka, Kenji Yazaki
  • Publication number: 20110050376
    Abstract: A laminate stack having individual soft magnetic sheets. The individual sheets are involutely curved in the laminate stack. Each individual sheet has a first long side, a second long side opposite the first long side, a first short side and a second short side opposite the first short side. The first long side has a recess, said recess being rectangular and equidistant from the first short side, the second short side and the second long side when the individual sheet is in its uncurved state.
    Type: Application
    Filed: August 26, 2010
    Publication date: March 3, 2011
    Applicant: Vacuumschmelze GmbH & Co., KG
    Inventors: Joachim Gerster, Herbert Hoehn
  • Publication number: 20100282223
    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: Application
    Filed: February 17, 2009
    Publication date: November 11, 2010
    Applicant: CONTINENTAL AUTOMOTIVE US, INC.
    Inventors: Perry Robert Czimmek, Michael J. Hornby
  • Patent number: 7830231
    Abstract: A circuit breaker includes separable contacts, an operating mechanism structured to open and close the contacts, and a trip unit cooperating with the operating mechanism to trip open the contacts. The trip unit includes a sensor structured to sense current flowing through the contacts, a processor structured to output a trip signal responsive to the sensed current, and a trip actuator. The trip actuator includes a housing including a recess, a coil within the recess, the coil having an opening therethrough, a magnet within the recess, a thermoplastic bushing including a conduit therethrough, the thermoplastic bushing being coupled to the housing, and an armature disposable within the opening of the coil and slidably disposed within the conduit of the thermoplastic bushing. The magnet attracts the armature toward the housing. A spring biases the armature away from the housing, in order to cause the operating mechanism to trip open the contacts.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: November 9, 2010
    Assignee: Eaton Corporation
    Inventors: Harry James Carlino, Lloyd Allen Maloney, Joseph Bell Humbert, Martha Suryani
  • Patent number: 7819380
    Abstract: A solenoid apparatus includes a fixed core, a coil, and a movable core. The coil generates magnetic attractive force when the coil is supplied with electricity. The movable core is attracted to the fixed core by the magnetic attractive force generated between the fixed core and the movable core when the coil is supplied with electricity. The fixed core has a fixed axial end on a side of the movable core. The movable core has a movable axial end on a side of the fixed core. At least one of the fixed axial end and the movable axial end has at least one recession. The at least one of the fixed axial end and the movable axial end, which has the at least one recession, has an outer circumferential periphery and an inner circumferential periphery. The outer circumferential periphery radially communicates with the inner circumferential periphery through the at least one recession.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: October 26, 2010
    Assignee: Denso Corporation
    Inventors: Koichi Sugiyama, Shinsuke Yamamoto, Takayuki Hokao
  • Publication number: 20100252757
    Abstract: A magnetic actuator (1) comprising a stationary part (3), a movable part (4) and a coil (10) arranged circumferentially relatively to the movable part (4) in such a manner that the movable part (4) is moved relatively to the stationary part (3) in response to a magnetic field induced when an electrical current runs in the coil (10). The stationary part (3) and the movable part (4) are shaped in such a manner that one is provided with a protruding part (5) and the other is provided with a recess (6) adapted to receive the protruding part (5). Thereby the minimum distance between the stationary part (3) and the movable part (4) are kept relatively low, and it is thereby possible to obtain a large pulling force without increasing manufacturing costs. The actuator (1) further comprises a shading ring (7) providing a magnetic field having a phase which is different from the phase of the field induced by the coil (10).
    Type: Application
    Filed: June 26, 2008
    Publication date: October 7, 2010
    Inventors: Michael Birkelund, Jan Lindberg Larsen
  • Publication number: 20100219919
    Abstract: The invention relates to an electromagnetic actuator with variable reluctance comprising a fixed ferromagnetic armature (3) comprising at least two concentric cylinders of revolution linked by a ring nut, at least one magnetizing winding (2) arranged between said cylinders, a ferromagnetic moving armature (4) guided in reciprocating translation movements relative to said fixed armature (3), with which it defines a magnetic circuit with an air gap (20), the dimension of which varies during reciprocating translation movements of the moving armature (4), wherein said fixed armature (3) comprises at least two series of slots, a first series of slots provided radially in said outer cylinder and extending over the entire height of said outer cylinder, and a second series of slots provided radially in said outer and inner cylinders and extending only over a major part of the height of said cylinders.
    Type: Application
    Filed: May 7, 2008
    Publication date: September 2, 2010
    Applicant: CENTRE NATIONAL D'ETUDES SPATIALES (C.N.E.S.)
    Inventors: Jean-Claude Vannier, Francois Dugue, Francois Roux, Isabelle Gibek, Denis Schwander
  • Publication number: 20100194504
    Abstract: The electromagnetic actuator comprises an electric coil (1) mounted in a magnetic yoke (2), first and second pole parts (3, 4), which are connected to the yoke (2) and each of which extends near a free space (5) in which a magnetic core (6) is translationally displaceable by the action of the power supply to the electric coil (1) and the formation of different magnetic fields in the pole parts (3, 4). The inventive actuator consists of a tubular part (7), which is made of a magnetic material, delimits, at least partially, the free space, surrounds the magnetic core (6) for guiding the displacement thereof and has magnetically continues with the pole part(s) (3, 4) in such a way that the radial air gap between the magnetic core (6) and the magnetic pole part(s) (3, 4) is reduced.
    Type: Application
    Filed: August 2, 2006
    Publication date: August 5, 2010
    Inventors: Aimé Goubely, Pascal Gantelme, Luca Cassini, Gillian Escandell, Eric Passolunghi
  • Patent number: 7710226
    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: Grant
    Filed: January 7, 2008
    Date of Patent: May 4, 2010
    Inventor: Victor Nelson
  • 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: 7696846
    Abstract: A drive solenoid, a yoke, an armature and at least one contact are mounted in a housing of an electromagnetic switching device. The drive solenoid, yoke and armature are inductively intercoupled, in such a way that when an inrush current is applied to the drive solenoid, the armature can be displaced into a pickup position, thus directly or indirectly actuating the contact. The yoke and/or armature contain(s) pulverulent magnetic material.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: April 13, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Reinhard Maier, Erich Zerbian
  • Patent number: 7688169
    Abstract: A long-proportional-stroke force motor which outputs force proportional to the exciting current. The motor has a magnetic circuit wherein a non-magnetic spacer is positioned axially between a magnetic guide and a magnetic sleeve. An armature moves within a central opening defined by the guide, the spacer and the sleeve. An end portion of the guide, adjacent to the spacer, has a sectional profile through a stepped surface facing radially outward and the corners of the steps define a curve which satisfies the following expressions: ? Y ? X > 0 , ? ? 2 ? Y ? X 2 > 0 , where X is a coordinate on an X-axis corresponding to a central axis of the guide; wherein the armature is moved in a direction along the X-axis by application of exciting current to a coil surrounding the guide, spacer and sleeve; and Y is a coordinate on an axis orthogonal to the X-axis.
    Type: Grant
    Filed: May 29, 2006
    Date of Patent: March 30, 2010
    Assignee: Minebea Co., Ltd.
    Inventor: Shen Zhao
  • Patent number: 7679477
    Abstract: A contactor with modular connection of the coil according to the invention comprises an insulating body, an operating coil housed in the insulating body, and means of modular connection of the coil to an external circuit so that the coil can be powered. The coil connection means comprise a connection arrangement, internal to the body, comprising at least two pairs of contact pieces positioned near at least two faces of the insulating body, these two faces being chosen from the front face and two opposed side faces running transversely between the front face and the rear face, each contact piece facing an opening in the body, and at least one removable connection module comprising a pair of connection terminals, which is connected to a second pair of contacts which are intended to collaborate with a first pair of contact pieces of the internal connection arrangement.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: March 16, 2010
    Assignee: ABB France
    Inventor: Alain Portier
  • Patent number: 7661653
    Abstract: An electromagnetic actuator includes a coil, which is formed in an annular shape, a plunger, and a stator, which receives the coil inside the stator and forms a magnetic circuit along inner and outer circumferences of the coil through the plunger. The stator includes first and second stators. The first stator includes a magnetic attraction portion that attracts the plunger in an axial direction of the plunger by magnetic force generated by the coil, and a first yoke portion that covers the outer circumference of the coil. The second stator includes a radial direction magnetism delivery-receipt portion that delivers magnetism in a radial direction of the plunger to and receives magnetism in the radial direction from the plunger, and a second yoke portion that covers the outer circumference of the coil. The first yoke portion and the second yoke portion overlap in the axial direction and are magnetically joined.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: February 16, 2010
    Assignee: Denso Corporation
    Inventor: Jirou Kondoh
  • 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: 7592890
    Abstract: A magnetic-path member includes first and second magnetic portions positioned on inner and outer peripheral sides of the magnetic-path member respectively. The magnetic-path member includes a non-magnetic portion interposed between the first and second magnetic portions and coupling the first and second magnetic portions by heat sintering. Magnetic lines of force occurring from an electromagnet pass through the magnetic-path member.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: September 22, 2009
    Assignee: GKN Driveline Torque Technology KK
    Inventors: Masashi Aikawa, Koji Iizuka, Masayuki Sayama, Katsuyoshi Koike
  • Patent number: 7581302
    Abstract: A magnetic gap in a solenoid core is formed by a non-magnetic brazing material bonded into a groove encircling the core in the region of the magnetic gap. A bore through a single piece core and valve cartridge is dimensioned to intersect the brazing material and remove magnetic material bridging the gap without severing the core into separate pieces. This allows the solenoid core and the valve cartridge to be machined in a single piece with a uniform diameter bore receiving a single piece solenoid plunger and valve spool. This ensures accurate concentricity of the plunger and spool within the bore, which improves magnetic performance while reducing manufacturing costs.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: September 1, 2009
    Assignee: G. W. Lisk Company, Inc.
    Inventor: Jeffery A. Tyler
  • Patent number: 7564332
    Abstract: A variable force solenoid is described, wherein the solenoid has a relatively long stroke and a relatively low profile. The solenoid includes an armature with at least one tapered surface and a pole piece with at least one tapered surface. The armature and the pole piece may each be provided with multiple tapers on more than one surface thereof.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: July 21, 2009
    Assignee: BorgWarner Inc.
    Inventor: Robert J. Telep
  • Patent number: 7557684
    Abstract: According to the invention, an electromagnetic switch includes a pair of fixed contacts, a movable magnetic core, a magnetic coil, and a fixed magnetic core. The movable magnetic core is configured to be moved by a magnetic attraction, thereby establishing an electrical connection between the fixed contacts. The fixed magnetic core is configured to create the magnetic attraction when the magnetic coil is energized. The fixed magnetic core has a base portion and a disc portion. The base portion is arranged to face the movable magnetic core. The disc portion is fixed to the base portion and formed of a stack of metal sheets including at least one base metal sheet and a balance metal sheet. The balance metal sheet has a thickness that is predetermined to balance a difference between a desired thickness of the disc portion and a total thickness of the at least one base metal sheet.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: July 7, 2009
    Assignee: Denso Corporation
    Inventor: Tadahiro Kurasawa
  • Publication number: 20090130868
    Abstract: The present invention provides a solenoid and electrical connector assembly which includes a solenoid body having a pair of electrical terminals disposed on opposite sides of a plunger component and a connector having two corresponding electrical terminals and a non-conductive blade or tongue disposed therebetween. When assembled, the tongue of the connector seats between the terminals on the solenoid body and inhibits corrosion and ingress of foreign matter in the region between the terminals of the solenoid.
    Type: Application
    Filed: November 15, 2007
    Publication date: May 21, 2009
    Inventors: Rebecca Lynn Schenk, Joshua Gilberg, Thomas H. Wilson
  • Patent number: 7535328
    Abstract: In an electromagnet switch, a stationary iron core is composed mainly of a base part and a disk part. The base part is faced to a plunger and the disk part is forcedly inserted and fixed to a boss part formed in the base part. The disk part is composed of a metal plate of ferromagnetic substance (iron plate) and another substance plate (made of resin or rubber and the like, for example,) of a smaller spring constant or a larger damping coefficient than that of the metal plate. The metal plate and another substance plate are laminated. Another substance plate absorbs or reduces the impact force when the plunger is electromagnetically attracted toward and collides with the base part. The propagation of a large impact noise or crashing sound is thereby suppressed, and as a result the impact noise can be reduced.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: May 19, 2009
    Assignee: Denso Corporation
    Inventors: Tadahiro Kurasawa, Shinji Usami, Tomohiro Teramachi
  • Patent number: 7520488
    Abstract: A two-port solenoid valve, which opens and closes a valve seat by operating a tabular valve member by using electromagnetic force and fluid pressure, capable of improving the responsiveness when the valve member closes the valve seat by the action of the fluid pressure is provided. The slender tabular valve member is disposed inside a valve chamber to which an elongate output orifice and an input orifice are open, and opens and closes the valve seat disposed around the output orifice in the same manner as a poppet valve. The valve seat is opened by attracting the valve member by the action of electromagnetic force applied to a rectangular fixed core, and is closed by the action of pressurized fluid flowing from the input orifice. In this two-port solenoid valve, a fluid chamber for introducing the pressurized fluid flowing from the input orifice and applying the fluid pressure to the valve member is formed in a slender rectangular pole face of the fixed core.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: April 21, 2009
    Assignee: SMC Corporation
    Inventor: Shinichi Yoshimura
  • Patent number: 7504920
    Abstract: A powdered metal electromagnetic is provided that has much less variance between units, increased frictional drag, reduced wear of itself and the brake drum disk during use and an increased resistance to moisture due to the use of a donor material that increases performance and reliability. In addition it can withstand much higher surface speeds while producing higher frictional drag.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: March 17, 2009
    Assignee: Tekonsha Engineering Company
    Inventor: William E. Richeson