With Magneto-mechanical Motive Device (e.g., Electromagnet With Armature) Patents (Class 335/220)
  • Patent number: 9722476
    Abstract: Self-centering electromagnetic transducers, such as linear motors and generators, are disclosed. In one embodiment, an electromagnetic transducer includes an outer yoke made of a ferromagnetic material, and a coil assembly including a plurality of loops of electrically conductive wire, wherein the coil assembly is substantially surrounded by the outer yoke. The electromagnetic transducer further includes a magnet, and an inner yoke made of ferromagnetic material. The magnet is disposed within the outer yoke such that the coil assembly surrounds the magnet. The inner yoke is disposed within the magnet, and the magnet is free to translate. The electromagnetic transducer further includes at least one high-reluctance zone positioned within the outer yoke and/or the inner yoke. In some embodiments, the electromagnetic transducer includes one or more actuators that vary a width of one or more high-reluctance zones to change a spring rate of the electromagnetic transducer.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: August 1, 2017
    Assignee: L-3 Communications Cincinnati Electronics Corporation
    Inventor: Andreas Fiedler
  • Patent number: 9619981
    Abstract: A haptic actuator more improved performance in response speed, frequency band, etc according to touch of user by improving magnetic force structure, comprises a case having an accommodation space therein; a core fixedly mounted in the accommodation space; a first coil member and a second coil member mounted on the outside of the core to be vertically spaced apart each other; a center yoke disposed between the first coil member and the second coil member and mounted on the outside of the core; a magnet disposed on the outside of the center yoke; a weight fixedly mounted on the outside of the magnet; a first elastic member having an end fixed to the magnet and the weight, and an opposite end fixed to the upper of the case and elastically supporting the magnet and the weight.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: April 11, 2017
    Assignee: HYSONIC. CO., LTD.
    Inventor: Se Jun Chun
  • Patent number: 9293243
    Abstract: An electromagnetic device includes: a fixed iron core; a movable iron core which is disposed to face the fixed iron core and which is displaceable in an axis line direction of the drive shaft; an electromagnetic coil; a permanent magnet which retains the movable iron core at the advanced position; supporting posts which are provided parallel to the axis line direction on both side surfaces of the fixed iron core and support the fixed iron core; an opening-side plate which is provided at one end portion of the supporting post; and a closing-side plate which is provided at the other end portion of the supporting post, wherein the advanced position of the movable iron core is restricted by the fixed iron core and the retreated position is restricted by the opening-side plate.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: March 22, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Taehyun Kim, Kyoichi Ohtsuka, Tohru Kimura, Kazuki Takahashi
  • Patent number: 9172277
    Abstract: An actuator includes an electrically conductive coil defining a longitudinal axis (L) and having a plurality of winding turns. A magnet is spaced from the winding turns in radial direction. A first conductive element has a mid region covering the coil on a side thereof facing away from the magnet. A second conductive element has a mid region covering the magnet on a side thereof facing away from the winding turns of the coil. The first conductive element projects beyond the coil in axial direction and the second conductive element projects beyond the magnet also in axial direction. The first and second conductive elements have respective collar-shaped projections whereat the first and second conductive elements project beyond the coil and the magnet, respectively. At least one of the first and second conductive elements is made of soft-magnetic powder composite material.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: October 27, 2015
    Assignee: ContiTech Vibration Control GmbH
    Inventors: Robert Genderjahn, Peter Marienfeld, Hans-Juergen Karkosch
  • Patent number: 9132472
    Abstract: A reinforcing bar binding machine is provided with a feed device for feeding a wire from a wire reel rotatably mounted on a binding machine body, a braking device for braking a rotation of the wire reel, and a control device that starts a braking to the rotation of the wire reel by the braking device after the wire is fed to a predetermined amount by the feed device.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: September 15, 2015
    Assignee: MAX CO., LTD.
    Inventor: Osamu Itagaki
  • Patent number: 9105386
    Abstract: A method of setting an air gap between an electromagnetic coil and an armature of an electro-mechanical device to be within a desired range includes applying a sensing signal to the electromagnetic coil and monitoring at least one electrical characteristic of the electromagnetic coil. The at least one electrical characteristic is related to a size of the air gap and the sensing signal. The method further includes moving the armature towards the electromagnetic coil to reduce the size of the air gap and stopping movement of the armature towards the electromagnetic coil when the at least one electrical characteristic indicates the size of the air gap is within the desired range.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: August 11, 2015
    Assignee: LITENS AUTOMOTIVE PARTNERSHIP
    Inventors: Zbyslaw Staniewicz, Scott Parsons, Andrew Malcolm Boyes
  • Patent number: 9075440
    Abstract: An operation input device includes a coil, an operation part configured to be displaced in an axial direction of the coil by the action of an operation input, a core whose positional relationship with the coil is changed by the displacement of the operation part, a yoke placed outside the coil, and a magnet configured to generate a magnetic flux that flows through the core and the yoke. The coil is configured to output a signal corresponding to the amount of the displacement of the operation part. The operation part is caused to move by an electric current flowing through the coil and the magnetic flux of the magnet.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: July 7, 2015
    Assignee: MITSUMI ELECTRIC CO., LTD.
    Inventors: Kenichi Furukawa, Shigenori Inamoto, Yuki Takahashi, Yasutaka Kitamura, Masaharu Kagami, Kensuke Yamada
  • Patent number: 8941454
    Abstract: A proportionally acting solenoid with a plastics encapsulation having a fastening flange which is integrally formed thereon and contains shaped elements which permit installation of the solenoid onto the housing by axial pressing in, rotation and rotary latching, the shaped elements, in interaction with metallic springs and shaped elements of the housing, holding the solenoid on a housing axially and against rotation, and the springs being tensioned upon rotation of the housing during the installation, and the seal which seals the radial gap between the solenoid and the housing being coordinated, by means of the configuration thereof, with a small axial installation force.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: January 27, 2015
    Assignee: Thomas Magnete GmbH
    Inventors: Jochen Grunschlag, Michael Stockschlader
  • Patent number: 8928440
    Abstract: One axial end of a through-hole of a bearing portion of a first stationary core located on a movable core side has a peripheral edge placed at a corresponding axial position. The corresponding axial position of the peripheral edge may be the same as an axial position of an axial end surface of a radially outer part of the first stationary core or is on an axial side of the axial end surface, which is axially opposite from the movable core. A bottom portion of a yoke may have a hole, which receives at least a part of a second stationary core. A stopper made of a resin material may be placed on a side of the bottom portion of the yoke, which is opposite from the second stationary core in the axial direction. A shaft may be abuttable against the stopper.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: January 6, 2015
    Assignee: Denso Corporation
    Inventors: Koichiro Matsumoto, Yoshiyuki Murao
  • Patent number: 8884731
    Abstract: A loosing- and twisting-proof fastening for solenoids, in particular with a tube pipe receiving a magnet armature, and a coil element. The coil element can be fixed on the tube pipe via a fastening element. On the tube pipe a safety element which can be brought into engagement with the tube pipe, on the one hand, and the coil element, on the other hand, is provided for a twisting-resistant arrangement of tube pipe and coil element.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: November 11, 2014
    Assignee: SVM Schultz Verwaltungs-GmbH & Co. KG
    Inventor: Hans-Kersten J. Lesk
  • Publication number: 20140300435
    Abstract: There is provided an electromagnetic actuator which can secure a sufficient thrust force at least at a certain level over a wide range of displacement. The electromagnetic actuator 1 having a point of amplified displacement includes: a displacement amplification mechanism 1A made of a magnetic material and having two surfaces 2as, 2bs that form a gap 5 therebetween; and a coil 6 provided in the displacement amplification mechanism 1A. A magnetic flux is generated by passing an electric current through the coil 6, thereby generating an attraction force between the surfaces 2as, 2bs. The attraction force displaces the point of amplified displacement.
    Type: Application
    Filed: April 7, 2014
    Publication date: October 9, 2014
    Applicant: TOKYO WELD CO., LTD.
    Inventors: Toshiro HIGUCHI, Hiroyuki NABAE, Koji TAKAHASHI
  • Patent number: 8854165
    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: April 18, 2013
    Date of Patent: October 7, 2014
    Assignee: Saia-Burgess, Inc.
    Inventor: James C. Irwin
  • Patent number: 8854164
    Abstract: A pressure-regulating valve includes a magnetic actuator and a housing. Accommodated in the housing is an armature, which is movable in a pole tube. The pole tube is encompassed by a magnetic coil. The armature is supported in the pole tube in a film structure.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: October 7, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Walter Fleischer, Klaus Schudt, Guenther Krehl, Christof Ott
  • Patent number: 8814136
    Abstract: A solenoid valve includes a linear solenoid and a ring-shaped rubber packing. The solenoid includes a yoke, an outer connector, a volume changing chamber, and a breathing passage. The yoke is made of a magnetic material and formed in a generally cylindrical cup shape having a cup-bottom part and a cup-opening part. The cup-opening part includes a notch. The connector is made of resin and exposed from the notch to an outside of the yoke. Volume of the chamber is changed in accordance with operation of the solenoid. The passage is formed inside the solenoid, and communicates with the chamber. The passage includes an outer opening, which opens into the outside of the yoke and is located at a fitted part between the yoke and the connector. The packing is attached around a base of the connector, where the yoke and the connector are fitted together.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: August 26, 2014
    Assignee: Denso Corporation
    Inventors: Hiroyuki Mizui, Yoshitsugu Inaguma, Motoyoshi Ando
  • Patent number: 8803645
    Abstract: A proportionally acting solenoid with a plastics encapsulation having a fastening flange which is integrally formed thereon and contains shaped elements which permit installation of the solenoid onto the housing by axial pressing in, rotation and rotary latching, the shaped elements, in interaction with metallic springs and shaped elements of the housing, holding the solenoid on a housing axially and against rotation, and the springs being tensioned upon rotation of the housing during the installation, and the seal which seals the radial gap between the solenoid and the housing being coordinated, by means of the configuration thereof, with a small axial installation force.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: August 12, 2014
    Assignee: Thomas Magnete GmbH
    Inventors: Jochen Grunschlag, Michael Stockschlader
  • Publication number: 20140216376
    Abstract: A coil (4) for a solenoid valve (2) in particular for actuating a camshaft adjuster, including a coil carrier (6) with an underside, a pot (8) with a base on which the underside of the coil carrier (6) is placed and with a wall which forms an intermediate space (16) with respect to the coil carrier (6), and a yoke disk (10) which is placed on the pot (8) with coil carrier (6) and which covers the intermediate space (16), wherein the intermediate space (16) is open via a flow gap (34) between the yoke disk (10) and the coil carrier (6) and/or between the yoke disk (10) and the pot (8) and is provided for receiving a filler (36). The flow gap (34) is formed for the hardening of the filler (36).
    Type: Application
    Filed: February 27, 2012
    Publication date: August 7, 2014
    Applicant: Schaeffler Technologies AG & Co., KG
    Inventors: Jens Hoppe, Stefan Konias, Uwe Wunderlich, Richard Baier
  • Patent number: 8773228
    Abstract: Actuator which can be actuated electromagnetically includes a coil, a magnetically conductive actuator sleeve being fixed in the magnetic field thereof. The magnetic field passes radially from the actuator sleeve to an axially movable armature and passes axially in the area of a pole plane from the armature to a return member which is stationary with respect to the actuator and, in so doing, generates a magnetic force which displaces the armature. The actuator sleeve for the magnetic flux of the coil has at least two functionally parallel passage areas having different cross sections for receiving the armature which has a conducting profile complementary to the actuator sleeve.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: July 8, 2014
    Assignee: ZF Friedrichshafen AG
    Inventor: Andreas Föster
  • Publication number: 20140184369
    Abstract: An actuator has an electrically conductive coil which has a longitudinal axis and a plurality of turns and a magnet arranged at a distance from the turns in radial direction relative to the longitudinal axis. The coil is partially covered by a central region of a first conducting element on a side which faces away from the magnet and the magnet is partially covered by a mid region of a second conducting element on a side facing away from the turns of the coil. The first conducting element projects beyond the coil and the second conducting element projects beyond the magnet in the direction of the longitudinal axis and there each have collar-like projections. The coil has a first winding turns region and a second winding turns region.
    Type: Application
    Filed: March 6, 2014
    Publication date: July 3, 2014
    Applicant: ContiTech Vibration Control GmbH
    Inventors: Robert Genderjahn, Stefan Preussler, Hans-Juergen Karkosch, Peter-Michael Marienfeld
  • Patent number: 8731390
    Abstract: Electromagnetic actuators for digital cameras, in particular miniature cell-phone and tablet cameras, include an electromagnet with a first elongated ferromagnetic member surrounded coaxially in part by a conductive coil along a first longitudinal axis, and a elongated second ferromagnetic member with a second longitudinal axis. The first and second ferromagnetic members have respective first and second operative surfaces and are aligned such that their longitudinal axes are parallel and such that respective operative surfaces overlap each other across a gap. The two members are mechanically coupled to respective frames. A frame hinge connects the frames and enables a relative tilt motion between the ferromagnetic members when current passes through the coil. The tilt motion is convertible into a linear displacement along an optical axis of an optical element coupled to the actuator. Two actuators can be combined into an assembly capable of providing double-axis tilt.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: May 20, 2014
    Assignee: Corephotonics Ltd.
    Inventors: Ephraim Goldenberg, Gal Shabtay, Eliezer Mendlovic, Eran Kali
  • Patent number: 8727647
    Abstract: An actuator including a magnetic field generator configured to provide a magnetic field; and a conductive element mounted for movement relative to the magnetic field generator wherein the conductive element forms a series of loops around a series of different axes.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: May 20, 2014
    Assignee: Nokia Corporation
    Inventor: Marko Eromaki
  • 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
  • Patent number: 8692635
    Abstract: An apparatus including an electromagnetic coil and a magnet system. The electromagnetic coil includes electrical leads. The magnet system forms electrical conductors connected to the electrical leads of the coil. The magnet system is configured to provide an electrical interface.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: April 8, 2014
    Assignee: Nokia Corporation
    Inventor: Thomas Benedict Slotte
  • Patent number: 8665046
    Abstract: An electromagnet may comprise a pole piece (20) and coil assembly (30). The pole piece (20) may be magnetically susceptible and have a channel structure and a first flange member (22). The channel structure may have an annular inner side wall (24), an annular outer side wall (26) and an annular end wall (28) that fixedly couples the inner and outer side walls (24, 26) to one another on a first axial end (27) of the pole piece (20). The channel structure may be open on a second axial end (29) of the pole piece (20) that is opposite the first axial end (27). The first flange member (22) may be coupled to an end of one of the inner and outer side walls (24, 26) on the second axial end (29) and extend in a radial direction of the pole piece (20) towards an interior of the channel structure. The coil assembly (30) may be fixedly coupled to the channel structure between the inner and outer side walls (24, 26).
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: March 4, 2014
    Assignee: Litens Automotive Partnership
    Inventors: Zbyslaw Staniewicz, Scott Parsons, Gary J. Spicer
  • Publication number: 20130342296
    Abstract: A rotary solenoid (1) includes a stator (10), a rotor (40), and a torsion spring (50) connected between the stator (10) and the rotor (40). The stator (10) includes an armature (13) having three stator poles (14, 15) cooperatively defining a substantially cylindrical space (18) and a coil (19) wound about one of the stator poles (14). The rotor (40) includes a shaft (42) rotatably assembled to the stator (10) and a rotor core (44) fixed to the shaft (42) and received in the cylindrical space (18). The rotor core (44) has three rotor poles (43) corresponding to the stator poles (14, 15). The rotor (40) stays at a first position under the force of the torsion spring (50) and rotates to a second position under the force of the torsion spring (50) and the magnetic force of stator (10) when the coil (19) is powered.
    Type: Application
    Filed: June 20, 2013
    Publication date: December 26, 2013
    Inventors: Yue LI, Mao Xiong JIANG, Chui You ZHOU, Jin Yun GAN, Xiao Mei YUAN, Ying CHEN
  • Publication number: 20130321110
    Abstract: A methodological system contained within a single-poled electromagnetic repulsive circuit allowing objects to be transported securely within the boundaries created by the single-poled electro-magnetic environment. This invention introduces a 3 (three) phase rhetorical theory and the indoctrination of the term “single bi-polar electromagnetic repulsion,” of which regulates competitive interaction among objects placed in motion and creates motion within the framework of principled engineered objects.
    Type: Application
    Filed: June 4, 2012
    Publication date: December 5, 2013
    Inventor: Darryl Clines
  • Patent number: 8581683
    Abstract: An electromagnetic actuating unit of a hydraulic directional valve, which has an armature and a first and a second magnet yoke. The first and the second magnet yokes at least partially bind an armature space, the armature is arranged in the armature space so as to be axially displaceable, and the first and the second magnet yokes face each other in the axial direction of the armature.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: November 12, 2013
    Assignee: Shaeffler Technologies AG & Co. KG
    Inventors: Jens Hoppe, Markus Kinscher
  • Patent number: 8581682
    Abstract: A solenoid is provided for an electrical switch. The solenoid includes a coil having a passageway extending therethrough along a central longitudinal axis. The solenoid also includes a movable core having a coil segment and a magnet segment. The coil segment is received within the passageway of the coil such that the coil extends around the coil segment. The magnet segment includes a radially outer surface relative to the central longitudinal axis of the passageway of the coil. The movable core is movable relative to the coil along the central longitudinal axis such that the coil segment is movable within the passageway of the coil along the central longitudinal axis. A permanent magnet extends around at least a portion of the radially outer surface of the magnet segment of the movable core. The movable core is movable along the central longitudinal axis relative to the permanent magnet.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: November 12, 2013
    Assignees: Tyco Electronics Corporation, TE Connectivity India Private Limited
    Inventors: Sam Patino, Naveen Samuel Jesuraj, Palanisamy Vellaiyanaicken, Ryan Schwan
  • Patent number: 8575878
    Abstract: An energy converter includes a magnetism generation mechanism unit that generates a magnetic field when connected to an AC electrical power source, and a rotating mechanism unit having a single turn coil array member in which a plurality of single turn coils is disposed at a predetermined interval and a soft magnetic metal plate disposed on a side of the single turn coil array member opposite to the magnetism generation mechanism unit. The rotating mechanism unit is structured such that the single turn coil array member faces the magnetism generation mechanism unit across a predetermined magnetic gap and rotary driven by the magnetic field. Here, a drive signal period of the electrical power source is a period that maximizes an eddy current generated in the soft magnetic metal plate.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: November 5, 2013
    Assignee: TBK Co., Ltd
    Inventors: Tetsuo Sekiya, Kiyotsugu Narita
  • Patent number: 8576033
    Abstract: An electromagnet may comprise a pole piece and a coil assembly. The pole piece may be monolithically formed of a magnetically susceptible material and have a channel structure and a first flange member. The channel structure may have an annular inner side wall, an annular outer side wall and an annular end wall that fixedly couples the inner and outer side walls to one another on a first axial end of the pole piece. The channel structure may be open on a second axial end of the pole piece that is opposite the first axial end. The first flange member may be coupled to an end of one of the inner and outer side walls on the second axial end and extend radially from the channel structure. The coil assembly may be fixedly coupled to the channel structure between the inner and outer side walls.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: November 5, 2013
    Assignee: Litens Automotive Partnership
    Inventors: Zbyslaw Staniewicz, Christiaan Vander Ploeg, Gary J. Spicer
  • Patent number: 8576032
    Abstract: An actuator including actuator base, bobbin, and pole piece forming a pocket for a ferromagnetic armature located therein. The actuator including a radial magnet and a solenoid coil constructed and arranged to cause a linear displacement of the armature upon application of a coil drive current from a control circuit. The actuator may include a flexible membrane that partially encloses the armature to form an armature chamber filled with an incompressible fluid. In a valve design, a fluid flow is stopped by driving the membrane against a valve seat. Pressure from the controlled fluid in the conduit is transmitted through the membrane to the fluid within the armature chamber so that the armature does not need to counteract force applied to the membrane by the conduit fluid's pressure. A fluid flow is opened by driving the membrane away from the valve seat.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: November 5, 2013
    Assignee: Sloan Valve Company
    Inventors: Kay Herbert, Natan E. Parsons, Xiaoxiong Mo, Fatih Guler
  • Patent number: 8570121
    Abstract: An air circuit breaker comprises: a make-and-break unit having a stator and a blade-shaped movable element rotatably supported with a support shaft; an electromagnetic operation unit having a fixed iron core, a movable iron core provided below the fixed iron core, a coil to produce an electromagnetic force, and a permanent magnet; a capacitor to store electric power to excite the coil; a control circuit board that controls a carrying direction of a current supplied from the capacitor to the coil in response to an input command or a breaking command to the make-and-break unit; and a servo mechanism provided above the electromagnetic operation unit and connected to the movable iron core, that transmits a driving force from the electromagnetic operation unit to the make-and-break unit.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: October 29, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Masashi Sawada, Ayumu Morita, Masato Yabu, Motoki Shibuya
  • Patent number: 8547192
    Abstract: In an electromagnetic actuator, an electromagnetic drive section forms a flux path between a plunger and an inner yoke, each member being made of magnetic material, and which drives the plunger in an axial direction through electromagnetic force, an operation section has a dog movable between a connection position where it is connected with a mating part and a release position where it is apart from the mating part in the axial direction, and which restrains movement of the mating part in a circumferential direction when the dog is at the connection position, and a retaining ring is interposed between the plunger and the dog such that relative movement of the dog to the plunger in the circumferential direction is permitted and relative movement of the dog to the plunger in the axial direction is restricted.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: October 1, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yukihiko Ideshio, Yoshihiro Iijima, Hideaki Komada, Miyoshi Kawaguchi, Hidetoshi Aoki, Takaji Umeno
  • Patent number: 8534247
    Abstract: A valve timing control apparatus includes a linear solenoid having a coil, a casing, a needle, a pair of cylindrical stators and a cylindrical spacer. The pair of cylindrical stators oppose with each other through an air gap in an axis direction. The pair of stators and the needle form a magnetic circuit so as to drive the needle to reciprocate. The cylindrical spacer fits with an outer circumference side of the pair of stators so as to restrict a short circuit from being generated in the magnetic circuit between the pair of stators. The spacer defines a discharge passage that connects the air gap to a discharge port of the casing.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: September 17, 2013
    Assignee: Denso Corporation
    Inventors: Akira Hori, Yoshiyuki Murao, Yasuhiro Hamaoka
  • Patent number: 8528686
    Abstract: An actuator assembly including, a polar assembly including an inner tooth and an outer tooth, and a magnet disposed between the inner tooth and the outer tooth, the magnet operative to interact with the polar assembly to induce an electromagnetic torsion bar operative to impart a torque on a first shaft connected to the ring magnet.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: September 10, 2013
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Ashok Chandy, Mohammad S. Islam
  • Patent number: 8531259
    Abstract: A proportional electromagnet includes a cylindrical shell, first and second covers connected to two ends of the shell by riveting, a metal core inserted through an axial defined in the second cover and formed with a first section located in the shell and a second section located outside the shell, a coil unit provided between the shell and the metal core, a supporting element provided on the first section of the metal core, a bushing provided on the second section of the metal core, a copper ring provided on the first section of the metal core to improve magnetic thrust of the proportional electromagnet, a stop provided on the first section of the metal core, and a magnetic shield provided between the first section of the metal core and the coil unit to direct magnetic flux toward the supporting element and the metal core to stably drive the metal core.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: September 10, 2013
    Assignee: Chung-Shan Institute of Science and Technology, Armaments, Bureau, Ministry of National Defense
    Inventors: Chuen-An Chen, Chieh Tung, Che-Pin Chen, Min-Fang Lo, Yao-Ming Huang
  • Patent number: 8487731
    Abstract: Provided is a magnetic element capable of enhancing fixing strength of a base with respect to a core even if the base is fixed to the core by insert molding. A magnetic element (1) includes a core (2) made of a magnetic material, and resin bases (3 and 4) formed by insert molding so as to be fixed to end portions of the core (2), in which the core (2) is provided with a recess (2b) recessed from an end face (2a). In the magnetic element (1), it is possible to enhance the fixing strength of the bases (3 and 4) with respect to the core (2).
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: July 16, 2013
    Assignee: Sumida Corporation
    Inventor: Yasunori Morimoto
  • Patent number: 8466763
    Abstract: An electromagnetic device, which includes a ferromagnetic flux guide; an insulated electrical conductor positioned adjacent to the ferromagnetic flux guide; and, an intermediate support structure positioned between the ferromagnetic flux guide and conductor which includes at least one resiliently deformable member arranged to allow relative movement between the ferromagnetic flux guide and the insulated electrical conductor, in which the relative movement is due to thermal expansion or contraction of the ferromagnetic flux guide and insulated electrical conductor.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: June 18, 2013
    Assignee: Rolls-Royce PLC
    Inventors: Alexis Lambourne, Geraint W Jewell
  • Patent number: 8456262
    Abstract: An electromagnetic solenoid includes first and second stators arranged at two axial end sides of a coil. The first stator includes an annular radial core part, an axial core part cylindrically extending from an inner end of the radial core part toward the second stator, and a core corner part having an outer corner surface at an intersection of the radial and axial core parts. A plunger guide includes a cylindrical sleeve inward of the stators, a flange extending radially outward from the sleeve along a side of the radial core part opposed to the coil, and a plunger-guide corner part having an inner corner surface at an intersection of the sleeve and the flange. The outer and inner corner surfaces of the core corner part and the plunger-guide corner part abut on each other in a contact portion linearly or in area along an entire circumference.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: June 4, 2013
    Assignee: Denso Corporation
    Inventor: Jiro Kondo
  • Patent number: 8436704
    Abstract: A solenoid actuator includes a stator assembly with a stator core of formed powder metal received in a stator housing. A ferromagnetic protective sleeve is in contact with and covers a majority of an inner end face and a cylindrical wall of the stator core, while a flux ring is in contact with and covers an outer end face of the stator core. An armature assembly includes an armature attached to a stem that is movable in an air gap relative to the ferromagnetic protective sleeve. A spring is operably positioned in the ferromagnetic protective sleeve but electrically isolated from the stator housing. The stator core is encapsulated to protect against erosion and fragmentation. A magnetic flux line around a solenoid coil passes through the stator core, the ferromagnetic protective sleeve, the armature, the flux ring and back to the stator core.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: May 7, 2013
    Assignee: Caterpillar Inc.
    Inventors: Jayaraman K. Venkataraghavan, Saboor Sheikh, Daniel Richard Ibrahim, Michael C. Long, Nadeem N. Bunni
  • Publication number: 20130093547
    Abstract: A method of setting an air gap between an electromagnetic coil and an armature of an electro-mechanical device to be within a desired range includes applying a sensing signal to the electromagnetic coil and monitoring at least one electrical characteristic of the electromagnetic coil. The at least one electrical characteristic is related to a size of the air gap and the sensing signal. The method further includes moving the armature towards the electromagnetic coil to reduce the size of the air gap and stopping movement of the armature towards the electromagnetic coil when the at least one electrical characteristic indicates the size of the air gap is within the desired range.
    Type: Application
    Filed: June 23, 2011
    Publication date: April 18, 2013
    Applicant: Litens Automotive Partnership
    Inventors: Zbyslaw Staniewicz, Scott Parsons, Andrew Malcolm Boyes
  • Patent number: 8421562
    Abstract: An electromagnetic switch unit comprises a solenoid device that pushes out a pinion gear to a ring gear side of an engine, and an electromagnetic switch that opens and closes a main point of contact of a motor circuit. The solenoid device and the electromagnetic switch are arranged in series in an axial direction, while a magnetic plate that forms a part of magnetic circuit between a first coil used for the solenoid device and a second coil used for the electromagnetic switch is shared by the solenoid device and the electromagnetic switch.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: April 16, 2013
    Assignee: Denso Corporation
    Inventors: Mitsuhiro Murata, Masami Niimi
  • Patent number: 8421566
    Abstract: A linear solenoid includes a coil assembly having a coil, and a cup-shaped yoke arranged at an outer peripheral side of the coil. The yoke is provided with a recess portion that is opened at least at a position in a circumferential direction of the yoke and extends in an axial direction of the yoke. The coil assembly includes a connector portion that has a terminal connected to an exterior and is exposed from the recess portion to an exterior of the yoke, and a secondary molding portion made of a secondary molding resin in which the coil is insert-molded. Furthermore, the secondary molding portion includes a cover portion that is arranged to cover the recess portion of the yoke from an outer peripheral side of the recess portion. Thus, the cover portion can restrict foreign-material mixed oil from being introduced into the yoke.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: April 16, 2013
    Assignee: DENSO CORPORATION
    Inventors: Kazuhiro Sasao, Akinori Hirano
  • 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: 8421563
    Abstract: The invention relates to an arrangement of stringed solenoid drives (1, 2, 3), particularly for solenoid valves, wherein each solenoid drive comprises a magnetic circuit with a yoke (4), moveable armature (5), and an excitation coil (6) arranged on the yoke. The magnetic circuits of neighboring solenoid drives have pre-magnetization with the same polarity and at least approximately the same strength. Due to the pre-magnetization, the magnetic potential difference between neighboring magnetic circuits is reduced. The pre-magnetization is thus carried out with the same polarity as the excitation by current flow in the excitation coil.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: April 16, 2013
    Assignee: Buerkert Werke GmbH
    Inventors: Olaf Beyer, Claus Brust, Rainer Kunzler, Simone Muller, Ralf Scheibe
  • Patent number: 8400242
    Abstract: A solenoid for a park lock mechanism wherein an annular frame has a reduced diameter at one end and receives a bobbin with a coil wound thereon with the bobbin projecting outward of the coil at one end and defining an integral bearing positioned in the one end of the annular frame. A magnetic permeable sintered metal bushing is interposed between the integrated bearing of the bobbin and the one end of the annular frame. A plunger is received in the bobbin for sliding movement relative thereto. The plunger has a first reduced section at one end that includes an element for connecting to a shifter and a second reduce section at its other end that projects out of said bobbin. The solenoid has two operating conditions, a first condition in which no magnetic force is applied to the plunger and a connected shifter is locked, and a second condition in which magnetic force is applied to the plunger and a connected shifter is unlocked for shifting.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: March 19, 2013
    Assignee: Johnson Electric S.A.
    Inventors: Elizabeth A. Zelmer, David W. Rawls, Alan F. Grouse
  • Patent number: 8390271
    Abstract: The present invention relates to magnetic anchorage equipment comprising a frame able to contain a plurality of polar units, each of the plurality of polar units having a ferromagnetic polar element which identifies an anchorage surface and a self-testing unit for checking the magnetic equipment. The magnetic anchorage equipment is characterized in that the self-testing unit for checking the magnetic equipment is at least partly integrated in the frame.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: March 5, 2013
    Assignees: Tecnomagnete S.p.A., Politecnico di Milano
    Inventors: Michele Cardone, Giovanni Cosmai, Roberto Faranda, Antonino Giglio
  • Patent number: 8384501
    Abstract: An electromagnetic actuator (1) with an armature (3) mounted so that the armature can be moved by virtue of a bearing arrangement (6A, 6B) and an electric coil (4) is provided for moving the armature (3). A magnetostrictive element (8) is provided, by which relative movement between the armature (3) and at least part of the bearing arrangement (6A, 6B) is produced.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: February 26, 2013
    Assignee: ZF Friedrichshafen AG
    Inventor: Michael Pantke
  • Patent number: 8362861
    Abstract: Electromagnetic actuator having an armature unit which is axially guided in a housing and movable by passing current through a coil device and in particular against a return force of a return spring out of a first stop position defined by means for limiting the stroke, the means for limiting the stroke having a stop element which is mounted terminally in the housing and manufactured by a shaping, stamping, sintering and/or injection molding method, and which is designed to cooperate with a plunger unit which can be actuated outside the housing and is designed for mechanically moving the armature out of the first stop position.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: January 29, 2013
    Assignee: ETO Magnetic GmbH
    Inventors: Andreas Martin, David Muffler, Ingo Bauerschmidt, Volker Knies
  • Patent number: 8350651
    Abstract: An oil immersed solenoid capable of easily and quickly removing air and air bubbles in oil in a space accommodating a movable core and preventing the air and the like from accumulating in the space. In an oil immersed solenoid in which a movable core is accommodated in a space of a tubular second guide so as to be movable in an axial direction of the second guide and the movable core is pulled by a fixed magnetic pole portion provided to be spaced apart from a tip end portion of the second guide, an air accumulation preventing portion is provided between the tip end portion of the second guide and a convex portion of a rear end portion of the fixed magnetic pole portion, and the second guide is made of a magnetic material and the air accumulation preventing portion is made of a non-magnetic material.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: January 8, 2013
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventor: Hiroaki Shimizu
  • Patent number: 8305176
    Abstract: An object is to provide an electromagnetic actuator that is highly resistant to corrosion and also capable of having high suction power, even in a condition where part of the electromagnetic actuator touches a corrosive liquid. An electromagnetic actuator 50 according to this invention is incorporated into a device using a corrosive liquid 17.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: November 6, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuhikio Baba, Hitoshi Kawaguchi, Toyoshi Nomura, Kazuhiro Nakane, Nobuo Kojima