With Reversible Magnetic Flux-type Movement (e.g., Bistable Type) Patents (Class 335/234)
  • Patent number: 10622878
    Abstract: The invention provides a power generation device including a magnetic conduction member, an induction assembly, and a magnet assembly. The induction assembly includes a magnetic core and a coil wound around the magnetic core. A first end of the magnetic core is connected to the magnetic conduction member. The magnetic conduction member includes a first magnetic conduction sheet and a second magnetic conduction sheet. When a second end of the magnetic core is contacted by the second magnetic conduction sheet, a first magnetic circuit is formed, and a magnetic line of the magnetic core is along a first direction. When the second end of the magnetic core is contacted by the first magnetic conduction sheet, a second magnetic circuit is formed, and a magnetic line of the magnetic core is along a second direction opposite to the first direction.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: April 14, 2020
    Assignee: WUHAN LINPTECH CO., LTD.
    Inventors: Xiaohua Zou, Xiaoke Cheng
  • Patent number: 9895185
    Abstract: A vapor delivery needle is provided that may include any of a number of features. One feature of the energy delivery probe is that it can apply condensable vapor energy to tissue, such as a prostrate, to shrink, damage, denaturate the prostate. In some embodiments, the vapor delivery needle can be advanced a pre-determined distance into the prostate by an actuation mechanism. The actuation mechanism can comprise, for example, a spring, or at least one magnet. Methods associated with use of the energy delivery probe are also covered.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: February 20, 2018
    Assignee: NXTHERA, INC.
    Inventors: Michael Hoey, Mark Schrom, Stephanos Paulos, Randall Beyreis, Mark Bilitz
  • Patent number: 9583248
    Abstract: In a solenoid of a hydraulic pressure control apparatus, a region adjacent to an oil flow guide portion of a stopper breathing passage is formed in a magnetism application region, through which a leakage magnetic flux leaking from a magnetic circuit at a time of turning on of a coil passes. Thereby, magnetic foreign objects made of iron or iron containing material are magnetically attracted to the leakage magnetic flux, so that intrusion of the foreign objects from an outside of the solenoid into a second volume variable chamber through the stopper breathing passage is limited.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: February 28, 2017
    Assignees: DENSO CORPORATION, NIPPON SOKEN, INC., HAMANAKODENSO CO., LTD.
    Inventors: Shota Toda, Shuhei Oe, Shoji Isogai, Motoyoshi Ando, Takao Ishida, Kengo Suzuki
  • Patent number: 9455077
    Abstract: A noise reduction type solenoid valve may include: a plunger moved in a linear direction; a bobbin installed so as to surround the plunger; a partition part protruding to the outside of the bobbin, and forming a plurality of divided spaces along a longitudinal direction of the bobbin; and a coil part wound in each of the divided spaces with the partition part interposed therebetween.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: September 27, 2016
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Jae Woo Jung
  • Patent number: 9236175
    Abstract: An electromagnetic actuating apparatus having an armature unit, which can be moved through a movement distance in an axial direction relative to a stationary core unit and in reaction to an operating current being passed through a coil unit, which armature unit magnetically interacts axially at one end with the core unit over a control range which at least partially overlaps axially along the movement distance, which, as a section of the armature unit, has a first profile section and, as a section of the core unit, has a second profile section, with an air gap formed between them and forms an extent at right angles to the axial direction.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: January 12, 2016
    Assignee: ETO Magnetic GmbH
    Inventors: Oliver Thode, Viktor Raff
  • Patent number: 8981885
    Abstract: The invention relates to an electromagnetic actuator comprising a wire coil, an armature and a catch, wherein the armature can be moved in an actuation direction, and wherein the catch secures the armature within the electromagnetic actuator. In order to secure an armature of the electromagnetic actuator, extra parts are mounted to the electromagnetic actuator or the armature is attached via a spring. This results in bigger sizes or insufficient stopping characteristics. The present invention overcomes these disadvantages by locating a catch inside the electromagnetic actuator.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: March 17, 2015
    Assignee: Tyco Electronics Belgium EC BVBA
    Inventors: Tom Ocket, Guus Mertens, Geert De Boever, Peter Devos, Jan Van Cauwenberge
  • Patent number: 8952771
    Abstract: This invention provides a switch in which the switch components are separately arranged at the portion where the switch components tend to be arranged in a concentrated manner in the housing without being collectively arranged in one region in the housing to achieve miniaturization and slimming, and in which the welding avoiding performance at the contact is enhanced to extend the lifespan, and an electronic device.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: February 10, 2015
    Assignee: OMRON Corporation
    Inventors: Yasuhiro Kiyono, Toshihiro Naruo
  • 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: 8710945
    Abstract: A multistable electromagnetic actuator is provided which addresses a need for a more robust, reliable and energy efficient actuation device. It comprises an armature (10) having a permanent magnet (8), wherein the armature is movable between first and second stable positions, and two electric coils (14a,14b) disposed on opposing sides of the armature along its direction of movement, with their axes substantially aligned with said direction. A magnetic flux container (2) substantially surrounds the armature and the coils to contain magnetic flux generated thereby and to shield its interior from external magnetic flux. In each stable position magnetic flux generated by the permanent magnet (8) extends around a magnetic circuit path including the container so as to retain the armature in its stable position. Energising the coils (14a,14b) causes the armature (10) to move from one stable position to the other. It is suitable for a broad range of applications, including fluid flow control for example.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: April 29, 2014
    Assignee: Camcon Oil Limited
    Inventor: Wladyslaw Wygnanski
  • Publication number: 20140104020
    Abstract: An impulse solenoid valve with at least one solenoid coil, a magnetically soft magnetic circuit which comprises a stationary yoke and a movable solenoid core, and with a permanent magnet which is accommodated in the magnetic circuit such that it sectionally interrupts the magnetic circuit, is characterized in that a first portion and a second portion of the magnetic circuit each directly contact the same on opposite sides of the permanent magnet, preferably over the full surface.
    Type: Application
    Filed: October 10, 2013
    Publication date: April 17, 2014
    Applicant: Buerkert Werke GmbH
    Inventors: Olaf Beyer, Sebastian Kahl, Martin Doerr
  • Patent number: 8674795
    Abstract: A magnetic actuator unit is provided for a circuit breaker, such as a medium voltage vacuum circuit breaker. The magnetic actuator unit includes a core, a coil, an actuating shaft, a first movable plate, a second movable plate, and a non-magnetic flat insert arranged between the core and the second movable plate. The magnetic actuator unit configured to switch the circuit breaker ON and OFF by moving the first movable plate between an ON position and an OFF position. The non-magnetic flat insert and the second movable plate are configured to adjust a holding force of the magnetic actuator unit provided by the second movable plate at the OFF position. The holding force is sufficient for holding the second movable plate at the OFF position against outer forces that are acting on the magnetic actuator unit.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: March 18, 2014
    Assignee: ABB Technology AG
    Inventor: Christian Reuber
  • Patent number: 8669836
    Abstract: A magnetic trigger mechanism with a yoke with armature opening. The armature is coaxially surrounded by a coil having an excitation coil, which is acted on by a force of a preloaded spring and which remains in a first end position due to magnetic holding force of a permanent magnet when there is no current flowing through the excitation coil. The permanent magnet is arranged at a first end of the armature and the second end position of the armature being achieved by a brief flow of current through the excitation coil together with the accompanying lowering of the magnetic holding force and the spring force. The first end of the armature is guided in the coil body, and the second end position, which faces the armature opening, is guided by a centering ring, the highly permeable centering ring rests against the yoke at the armature opening and can move.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: March 11, 2014
    Assignee: Johnson Electric Dresden GmbH
    Inventors: Matthias Kulke, Thomas Roechke
  • Publication number: 20130328650
    Abstract: An energy efficient magnetic actuator includes an armature with attached shaft and a divergent flux path electromagnet with an outer magnetic enclosure containing a ring or toroid permanent magnet, two control coils one on either side of the permanent magnet, and a center pole piece through the permanent magnet and control coils having a bore to allow movement of the shaft. The majority of the magnetic flux in the center pole piece can be diverted in a single direction by a pair of control coils for the purpose of moving and magnetically latching the armature to the electromagnet or de-latching the armature from the electromagnet with aid of external forces to the shaft to overcome the small residual magnetic latching force resulting from leakage flux. The control coils may be energized in a variety of ways to achieved desirable linear or bi-linear motion of the armature.
    Type: Application
    Filed: June 6, 2012
    Publication date: December 12, 2013
    Inventor: Glen A Robertson
  • Publication number: 20130328649
    Abstract: Divergent flux path magnetic actuation is a technique employed to move and magnetically hold an armature in electromechanical actuator devices. These actuators are typically used for linear and reciprocating application with a shaft firmly fixed to an armature or central pole piece to convey movement and forces. By incorporating a bearing about the shaft, rotation can also be conveyed. Further these actuators are more adaptable to energy saving applications than conventional solenoids, specifically when their control coils are parallel connected to reduce the input voltage from a power source and electrically pulsed from a capacitor to reduce the energy input. Thus divergent flux path magnetic actuators can be used for multipurpose energy saving applications and adapted to a variety of devices that would commonly use conventional solenoids.
    Type: Application
    Filed: June 6, 2012
    Publication date: December 12, 2013
    Inventor: Glen A. Robertson
  • Publication number: 20130241680
    Abstract: A standard solenoid body and coils are combined with a non-magnetic armature tube containing a permanent magnet, preferably neodymium. The magnet is located in one of three positions within the armature. When biased toward the stop end of the solenoid, it may be configured to act as a push solenoid. When biased toward the collar end of the solenoid, it may be configured to act as a pull solenoid. In either case, no spring is required to return the armature to its de-energized position. Positioning the magnet in the middle of the armature defines a dual-latching solenoid requiring no power to hold it in a given state. A positive coil pulse moves the armature toward the stop end, whereas a negative coil pulse moves the armature toward the collar end. The armature will remain at the end to which it was directed until another pulse of opposite polarity comes along.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 19, 2013
    Applicant: Hanchett Entry Systems, Inc.
    Inventors: Leland J. Hanchett, JR., Dominik Scheffler
  • Patent number: 8528688
    Abstract: A lock device that restricts movement of a movable body includes: a lock member that is engageable with an engagement portion formed at the movable body; an urging member that urges the lock member in a direction away from the engagement portion; and an actuator that moves the lock member toward the engagement portion to engage the lock member with the engagement portion against an urging force generated by the urging member.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: September 10, 2013
    Assignee: JTEKT Corporation
    Inventors: Yutaka Mori, Yoshiyuki Shibata
  • Patent number: 8497750
    Abstract: A release mechanism for a circuit interrupting device includes a ferromagnetic main frame through which can flow a current and a ferromagnetic movable core designed to be translated in an opening of the main frame between a first position where the circuit interrupting device remains closed and a second position where the circuit interrupting device is opened. The release mechanism is designed to use the flux generated inside the main frame by the current flowing through it to displace the movable core between its first and second positions. The release mechanism further includes at least two permanent magnets mounted on the main frame on each side of the opening and relatively oriented so as to generate a unidirectional unique magnet flux inside the main frame and the movable core, the magnet flux creating a first force on the movable core that tends to maintain it in its first position.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: July 30, 2013
    Assignee: Secheron SA
    Inventor: Christopher Nazeri
  • Patent number: 8461951
    Abstract: In a bistable magnetic actuator with a polarized magnetic circuit with parallel operating air gaps, wherein between the outer legs of a U-shaped soft-iron yoke a flat permanent magnet is integrated that carries a soft-iron center leg and applies a permanent-magnetically created magnetic flux to a rocking armature supported on the center leg, wherein at each outer leg a separately controllable excitation winding provides swiveling pulses for the rocking armature to swivel from one permanent-magnetically self-holding swivel position into the other, the permanent-magnetically created magnetic flux through the magnetic circuit closed over the rocking armature in each case for an electromagnetic magnetic flux created by the excitation winding of said magnetic circuit in a direction opposed to the permanent-magnetically created magnetic flux commutates into the other parallel magnetic circuit with the electromagnetically not excited excitation winding, swiveling over the rocking armature.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: June 11, 2013
    Assignee: Johnson Electric Dresden GmbH
    Inventors: Jörg Gassmann, Steffen Schnitter, Marcus Herrmann
  • Patent number: 8378836
    Abstract: A magnetic field strength threshold alarm that includes sensing means responsive to a magnetic field and actuating in response to field strength above a predetermined threshold, the sensing means being configured to be operational and able to actuate without consumption of energy; and alarm means for outputting an alarm responsive to the sensing means actuation, the alarm means being configured not to consume energy prior to actuation of the sensing means and only consuming energy subsequent to actuation of the sensing means. So, energy is not consumed by the alarm means prior to actuation. The alarm may be considered to include energy storage means for providing electrical energy, wherein the sensing means, the alarm means and energy storage means being operatively connected such that the electrical energy from the energy storage means is provided only when the sensing means is actuated.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: February 19, 2013
    Assignee: Kopp Development Inc.
    Inventors: Keith Kopp, Harold Duane DeMent
  • Patent number: 8360392
    Abstract: A valve control device, in particular for control pods or similar equipment used in the mining and/or production of mineral oil/natural gas, comprises a valve housing in which hole or boring sections are arranged, and a valve slide movable relative to the hole sections, with at least a first and a second flow hole for the alternative connection of a feed line from a fluid pressure hose with at least one actuator or of the actuator to return line for leading the fluid away, wherein in each case one of the connections is made and the other is interrupted.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: January 29, 2013
    Assignee: Cameron International Corporation
    Inventors: Klaus Biester, Peter Kunow
  • Patent number: 8339225
    Abstract: An electromagnetic actuating device (1) having a housing (2) and two actuator pins (3, 4) that are supported in the housing so as to be movable independently of each other between a retracted rest position and an extended working position, and locking pins (7, 8) that hold the actuator pins in the rest position via locking mechanisms and that can be moved relative to the actuator pins in the movement direction of the actuator pins. A force is applied to the locking pins in the extension direction by further spring elements (15), and the locking pins are moved in the retraction direction by electromagnetic force application in order to unlock the locking mechanisms. The actuating device is an electromagnet (22) associated with the locking pins in common and having a reversible direction of the magnetic field, and the end sections (19) of the locking pins facing away from the actuator pins are provided with bipolar permanent magnets (20, 21) that are oriented with opposite polarities in the movement direction.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: December 25, 2012
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Andreas Nendel
  • Patent number: 8327853
    Abstract: A bistable magnetic holding device, which includes: a nonmagnetic support casing in the form of a channel with a rectangular cross-section; a magnetic core including a base and three legs set perpendicularly to the base, the two outer legs and the base forming a “U”; a permanent magnet in the form of a bar inserted between the base and the middle leg; a coil surrounding the middle leg; a flat movable part; and a return motion and guidance means built into the inside walls of the support so as to allow return motion, toward the upper part of the support casing, of the magnetic core.
    Type: Grant
    Filed: May 25, 2009
    Date of Patent: December 11, 2012
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Dominique Ponsort, Alain Riwan, Julie Bonnemason
  • Patent number: 8274348
    Abstract: A single coil solenoid includes a permanent magnet with bi-directional assist capabilities. The solenoid includes an armature that during de-energization of a single coil of wire is attracted to the permanent magnet thereby maintaining a hold position and during energization of the single coil has a polarity that repels the permanent magnet thereby creating a push/pull force. In this regard, the permanent magnet operates to not only hold the armature but also is used to push the armature when current is induced in the single coil.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: September 25, 2012
    Assignee: Woodward, Inc.
    Inventors: Richard P. Kolb, Kevin G. Nowobilski
  • Patent number: 8272622
    Abstract: An electromagnetic actuator comprises a core (1), a ferromagnetic component (2) movable in a gap (5) in the core, and a magnet (4) for attracting the component to one side of the gap. A flux concentrator (12) concentrates the magnetic flux on that side of the gap (5) and a solenoid (8) produces magnetic flux in the gap. A magnetic circuit of the solenoid is defined by part of the core (1), part of the gap (5) and by a further gap (6) between the ferromagnetic component (2) and the core (1). A demagnetiser (7) has a magnetic circuit defined by another part of the core (1), another part of the gap (5) and by the further gap (6). The demagnetiser is arranged to demagnetise the magnet (4) at least to the extent that the magnetic flux produced by the solenoid (8) is diverted from the flux concentrator (12) into the further gap (6) and the movable component (2) is movable away from the magnet (4) under the magnetic force of the solenoid (8).
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: September 25, 2012
    Assignee: Artemis Intelligent Power Limited
    Inventor: Niall James Caldwell
  • Patent number: 8237527
    Abstract: A permanent magnetic actuator includes a flux inducing unit having a hollow space therein and formed by laminating a plurality of plates, a movable element disposed in the hollow space of the flux inducing unit to be reciprocated, permanent magnets installed at inner walls of the hollow space, and guide members located between the permanent magnets and the movable element and configured to guide reciprocating motion of the movable element.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: August 7, 2012
    Assignee: LSIS Co., Ltd.
    Inventor: Young Gyu An
  • Patent number: 8228149
    Abstract: An electromagnetic control mechanism (1) with an actuating element (15) which can move longitudinally and can be retained in three stable positions. By way of two coils (3, 4), the actuating element (15) can be switched to a first or to a second stable position, namely, the two opposed end positions. The actuating element (15) comprises an actuator rod (7) with a permanent magnet (8) arranged on the actuator rod (7), such that the actuating element (15) can be retained magnetically in the third stable position by the permanent magnet (8).
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: July 24, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Thomas Puth, Reiner Keller, Michael Pantke
  • Patent number: 8215610
    Abstract: A bi-directional electromechanical valve comprising a cylindrical upper cover, two semi-cylindrical permanent magnets, two semi-cylindrical cases, a reverse U-shaped coil set, a cylindrical armature, a valve stem, a first spring and a second spring. The electromechanical valve can be opened and closed bi-directionally in a quick and powerful manner. With an integrated round-shaped design, the electromechanical valve not only reduces the dimensions, but also equalizes the valve wear caused by rotating valve during engine operations. The specially designed cylindrical armature and its button-shaped bottom provide a stronger magnetic holding force to improve the strokes of the armature. The design of a single coil set and permanent magnets reduces the coil volume and the driving power effectively. The armature will stop at a fail-to-safe position at a power failure to provide a better driving way for an engine intake/exhaust valve.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: July 10, 2012
    Assignee: National Taipei University of Technology
    Inventors: Yaojung Shiao, Jian-Hau Huang
  • 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: 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: 8188821
    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: April 16, 2010
    Date of Patent: May 29, 2012
    Inventor: Victor Nelson
  • Patent number: 8169282
    Abstract: A switch and an electronic device maintain a power supply ON state until data processing is completed, and automatically turn OFF the power supply after the data processing is completed. The switch includes a rotation operating body that does not receive an operation force from an operating element when OFF operated is arranged inside the operating element. The rotation operating body includes a switch operating portion for turning ON a power supply switch mechanism and a return spring regulating piece for biasing a return spring in an anti-biasing direction. A regulating state of the return spring regulated by the return spring regulating piece is held, where the ON state of the power supply switch mechanism is held with a permanent magnet, and the ON state of the power supply switch mechanism is released by applying a release force on the permanent magnet when the power supply is reset.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: May 1, 2012
    Assignee: OMRON Corporation
    Inventors: Yasuhiro Kiyono, Toshihiro Naruo
  • Patent number: 8159806
    Abstract: A bistable electromagnetic actuator comprising a magnetic circuit comprising a magnetic yoke in which a shunt extends perpendicularly to a longitudinal axis of said yoke and comprising a permanent magnet positioned between a first surface of the yoke and the shunt. A plunger core is fitted with axial sliding between a latched position and an unlatched position. A coil extending between the shunt and a second surface of the yoke is designed to generate a first magnetic control flux to move the plunger core from an unlatched position to a latched position. A second magnetic control flux enables the plunger core to move from the latched position to the unlatched position by the action of a return spring.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: April 17, 2012
    Assignee: Schneider Electric Industries SAS
    Inventors: Christophe Cartier-Millon, Gilles Cortese, Cédric Bricquet, Hugues Filiputti, Michel Lauraire
  • Patent number: 8085119
    Abstract: The system contains a first planar permanent magnet having a first direction of magnetization and a first opening formed therein. A second planar permanent magnet has a second direction of magnetization and a second opening formed therein. The second opening is axially aligned with the first opening. The direction of magnetization of the first planar permanent magnet opposes the direction of magnetization of the second planar permanent magnet. A plurality of stationary coils are provided, wherein at least one of the stationary coils is located within the first opening and at least one of the stationary coils is located within the second opening. A pair of extension members traverses the first opening and the second opening. A magnetizable slug is integral with each of the extension members.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: December 27, 2011
    Assignee: Engineering Matters Inc.
    Inventors: Christopher J. Corcoran, Andrew M. Wright, David B. Cope
  • Publication number: 20110304417
    Abstract: A permanent magnetic actuator includes a flux inducing unit having a hollow space therein and formed by laminating a plurality of plates, a movable element disposed in the hollow space of the flux inducing unit to be reciprocated, permanent magnets installed at inner walls of the hollow space, and guide members located between the permanent magnets and the movable element and configured to guide reciprocating motion of the movable element.
    Type: Application
    Filed: May 25, 2011
    Publication date: December 15, 2011
    Inventor: Young Gyu AN
  • Patent number: 8013698
    Abstract: A magnetic actuator comprises at least one coil surrounded by a magnetic circuit. The magnetic circuit possesses three legs and two facing end plates. The three legs comprise two outer legs on either side of the coil and an intermediate leg passing through the coil. The legs have no direct mechanical contact with one another. The two facing end plates magnetically interconnect the three legs. The magnetic circuit comprises a moving armature comprising at least one of the end plates, and a stationary portion including a yoke having at least the other one of the end plates and at least one permanent magnet. The permanent magnet is placed at one end of the intermediate leg beside the end plate of the yoke. The magnetic actuator can control medium-voltage and high-voltage circuit breaker vacuum chambers.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: September 6, 2011
    Assignee: Areva T&D SA
    Inventors: Marc Bonjean, Pierre Leroy
  • Patent number: 7982563
    Abstract: The present invention relates to a control device (1, 1?) of an electrical circuit comprising: a microswitch (2, 2?) comprising a moving element that can be driven by magnetic effect between a first stable state and a second stable state to control the electrical circuit, a fixed permanent magnet (10, 10?), a moving permanent magnet (11, 11?) that can be actuated between a first position, in which it forms, with the fixed permanent magnet (10, 10?), a substantially uniform permanent magnetic field (B0) holding the moving element in the first state or the second state, and a second position in which it is able to control the switchover of the moving element from one state to the other, an excitation coil (4) able to create a temporary magnetic field (Bb) able to cause the moving element to switch over from one state to the other when the moving permanent magnet (11, 11?) is in the first position.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: July 19, 2011
    Assignee: Schneider Electric Industries SAS
    Inventors: Miguel Debarnot, Laurent Chiesi
  • Patent number: 7893802
    Abstract: A position switch is disclosed with a device to generate a magnetic force, with at least a first coil and at least one armature, it being possible to magnetize and move the armature via the first coil. How the magnetic force, particularly at the start of movement of the movable components of the device, can be increased to reduce the necessary power consumption of the first coil, is a focus of at least one embodiment. For this purpose, at least one embodiment of the device to generate a magnetic force includes at least one device to premagnetize the armature. The result includes a series of advantages, e.g. a smaller design, lower power consumption and possible use with multiple different switching units with different counterforces.
    Type: Grant
    Filed: July 2, 2007
    Date of Patent: February 22, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Silvio Förtsch, Bernhard Hiltl, Werner Puri, Joachim Seidl
  • Patent number: 7859144
    Abstract: Electromagnetic motor with a piston that moves linearly with respect to the stator in either direction. Embodiments include a piston internal or external the stator. The piston includes one or more magnetic flux producing elements in all embodiments, with some embodiments having a ferro-magnetic plate on either side of the flux producing element. Further, in all embodiments the stator includes three magnetic flux producing elements with either two coils with one or more magnets therebetween or with the two coils and a coil magnet substitute therebetween. All embodiments provide positive piston return to a center at rest position. In all embodiments the piston is centered with respect to the stator resulting from either magnetic interaction between the piston and stator magnets, or between the piston magnet and the stator magnet substitute coil.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: December 28, 2010
    Inventor: Joseph Y Sahyoun
  • Patent number: 7834727
    Abstract: This is a magnetic actuator including a mobile magnetic portion (20), a fixed magnetic portion (10) provided with at least two attraction areas (11, 12) for the mobile magnetic portion (20), and means (30) for triggering the displacement of the mobile magnetic portion (20), the mobile magnetic portion (20) being in levitation when it is not in contact with an attraction area (11, 12). The mobile magnetic portion (20) includes a magnet-based part (200) with reduced magnet weight, this part (200) having an overall volume, and a mass which is less than the one it would have if its overall volume was totally occupied by the magnet.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: November 16, 2010
    Assignees: Commissariat a L'Energie Atomique, Institut National Polytechnique de Grenoble, Universite Joseph Fourier, Centre National de la Recherche Scientifique
    Inventors: Jerome Delamare, Orphee Cugat, Christel Dieppedale, Jerome Meunier-Carus
  • Publication number: 20100277264
    Abstract: A solenoid assembly (1) is disclosed, the solenoid having a first electro-magnet (9) for producing a first magnetic field. There is also movable element (3), in the form of a permanent magnet (4), with flux guides (7,8) to distribute the magnetic field, which moves within the magnetic field created by the electro-magnet. A second electro-magnet (11) may also- be included in the solenoid thereby creating a push-pull solenoid. The second electro-magnet is arranged so that its magnetic field acts in the opposite direction to the first electro-magnet by having its coils wound in the opposite direction.
    Type: Application
    Filed: September 30, 2008
    Publication date: November 4, 2010
    Inventors: John Clifford Charnley, Clinton Eugene Sheppard
  • Patent number: 7804386
    Abstract: The invention relates to an electromagnetic control device for the opening and closing of a mechanical element, particularly a valve of an internal combustion engine. The positioning of the mechanical element in at least one position (open or closed) is achieved by the action of at least one solenoid (90) acting on a plate controlling the position of the mechanical element. The device has at least two gaps which are closed by the plate on the positioning of the mechanical element in at least one position, the plate being mounted to rotate such that the axis of rotation of the plate is between the two gaps. The device also has at least one permanent magnet (99b) to polarize the device such as to hold the plate in at least one position in the absence of current through the solenoid (90), said permanent magnet (99b) not being crossed by the principal magnetic flux (92) of the solenoid (90).
    Type: Grant
    Filed: July 4, 2005
    Date of Patent: September 28, 2010
    Assignee: Peugeot Citroen Automobiles SA
    Inventors: Jean-Paul Yonnet, Christophe Baldi, Christophe Fageon
  • Patent number: 7726297
    Abstract: In order to simplify and reduce the production costs of a push-button switch, especially a push switch or a rocker switch, the switch has a time function, which is manually operated and can be reset by an electric pulse. The electromechanical rocker or push-button switch can be combined to form a device block switch with other rocker or push-button switches as usually used in exhauster hoods. As a result, time-controlled intensive and follow-up steps can be carried out.
    Type: Grant
    Filed: June 21, 2004
    Date of Patent: June 1, 2010
    Assignee: BSH Bosch und Siemens Hausgeraete GmbH
    Inventors: Egon Feisthammel, Dieter Rosmann
  • Patent number: 7719394
    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: October 6, 2004
    Date of Patent: May 18, 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: 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: 7652549
    Abstract: A magnetic latch includes a stator having first and second permanent magnets disposed on either side of a center portion. Each of the first and second permanent magnets has at least two associated poles. A rotor has at least one magnetic region. The rotor is configured for rotation about an axis of the stator between a first latched position and a second latched position.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: January 26, 2010
    Assignee: Honeywell International Inc.
    Inventors: Steve L. Hadden, Paul D. Buchele, David Osterberg
  • Publication number: 20100008009
    Abstract: A bistable electromagnetic actuator comprising a magnetic circuit comprising a magnetic yoke in which a shunt extends perpendicularly to a longitudinal axis of said yoke and comprising a permanent magnet positioned between a first surface of the yoke and the shunt. A plunger core is fitted with axial sliding between a latched position and an unlatched position. A coil extending between the shunt and a second surface of the yoke is designed to generate a first magnetic control flux to move the plunger core from an unlatched position to a latched position. A second magnetic control flux enables the plunger core to move from the latched position to the unlatched position by the action of a return spring.
    Type: Application
    Filed: March 25, 2008
    Publication date: January 14, 2010
    Applicant: SCHEIDER ELCTRIC INDUSTRIES SAS
    Inventors: Christophe Cartier-Millon, Gilles Cortese, Cédric Bricquet, Hugues Filiputti, Michel Lauraire
  • Patent number: 7637475
    Abstract: A solenoid is provided which, in the preferred embodiment, has a housing having an axial opening in it. The housing has a divider mounted in the axial opening to separate the axial opening into a first segment and a second segment. Respective ones of a first pole piece and a second pole piece are located on opposite sides of the divider. The first pole piece is moveable with the first segment between an extended position and a retracted position, the first pole piece having a plunger positioned at an end of the first pole piece. A permanent magnet is moveably mounted from the axial opening and is moveable independently of the second pole piece between at least a first position adjacent to the divider, and a second position adjacent the second pole piece. The construction provides a fast acting, low cost latching solenoid construction.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: December 29, 2009
    Assignee: Kurz-Kasch, Inc.
    Inventor: Ross R. Adams
  • 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: 7579935
    Abstract: An actuator has a resilient shape memory member 1 with superelasticity, a magnetic body 2, and a magnetic field generator 3. At least one of the magnetic body 2 and the magnetic field generator 3 is fixed to the resilient shape memory member 1 such that one of the magnetic body 2 and the magnetic field generator 3 is stationary while the other is movable, whereby the movable member is moved by a magnetic field provided from the magnetic field generator 3.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: August 25, 2009
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masahiro Ohta, Toru Sukigara