With Permanent Magnet Patents (Class 361/147)
  • Patent number: 11031166
    Abstract: A switchable permanent magnetic unit is disclosed. The unit comprises: a housing, first and second permanent magnets, and a conductive coil. The first magnet is mounted within the housing and the second magnet is rotatable between first and second positions and mounted within the housing in a stacked relationship with the first magnet. The unit generates a first level of magnetic flux at a workpiece contact interface when the second magnet is in the first position and a second level of magnetic flux at the interface when the second magnet is in the second position, the second level being greater than the first level. The conductive coil is arranged about the second magnet and generates a magnetic field. A component of the conductive coil's magnetic field is directed from S to N along the second magnet's N-S pole pair when the second magnet is in the first position.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: June 8, 2021
    Assignee: Magswitch Technology Worldwide PTY LTD
    Inventors: David H. Morton, Thomas R. Whitt, Michael H. Reed, Michael C. Blanchard
  • Patent number: 10886052
    Abstract: The present disclosure provides an adsorption bar, a vacuum aligner system, and a control method of the vacuum aligner system. The adsorption bar includes an electromagnetic component and an adsorption member. The electromagnetic component includes a slide bar, a coil and a movable part. The coil is fixedly arranged on the slide bar. The movable part includes an elastic element and a magnet. One end of the elastic element is a fixed end which is fixedly connected to the slide bar, and the other end thereof is a free end which is connected to the magnet. The adsorption member is fixedly connected to the magnet and is exposed at one end, of the magnet, away from the coil. Current is applied to the coil to generate a magnetic field. The magnet longitudinally slides along the slide bar under a repulsive force of the magnetic field.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: January 5, 2021
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Benxiang Hou, Dahu Tang, Jun Xie
  • Patent number: 10671126
    Abstract: A foldable terminal includes: a first body, a second body, and a rotating shaft connecting the first body and the second body; a flexible display fixed to one side of the main body; and at least one set of first magnetic components including a first magnet and a second magnet that are attracted to each other. The first magnet is disposed at a side of the first body distal from the rotating shaft, and the second magnet is disposed on a side of the second body distal from the rotating shaft. When an angle between the first body and the second body is less than a threshold, an attraction force between the first magnet and the second magnet controls the flexible display to switch from a half-folded state to the folded state.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: June 2, 2020
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd.
    Inventor: Yuwen Wang
  • Patent number: 10653026
    Abstract: Illustrative examples include a system for coupling a first electronic device to a second electronic device. The first electronic device may include a housing having a first engagement surface and a first magnet array. The first engagement surface may be adapted to receive the second electronic device. The second electronic device may include a second magnet array. An actuator coupled to the first magnet array may move the first magnet array relative to the housing and the second magnetic array, to attractively couple or repulsively de-couple the second electronic device from the first electronic device.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: May 12, 2020
    Assignee: Intel Corporation
    Inventors: Samarth Alva, Krishnakumar Varadarajan, Yogesh Channaiah, Prakash Pillai, Sagar Pawar, Aneesh Tuljapurkar, Raghavendra N
  • Patent number: 10539981
    Abstract: The present disclosure relates to a foldable terminal including a body, a magnetic attraction assembly and a magnetic buffer assembly. The body includes an upper part, a bending part and a lower part. The upper part is coupled with the bending part. The bending part is coupled with the lower part. When an included angle between the upper part and the lower part is 0 degree, the magnetic attraction assembly attracts. When the included angle between the upper part and the lower part is greater than or less than 180 degrees, members of the magnetic buffer assembly repel each other. The present disclosure further relates to another two kinds of foldable terminals.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: January 21, 2020
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Yugui Lin, Jiao Cheng, Weibin Yu
  • Patent number: 10459490
    Abstract: The present disclosure relates to a foldable terminal including a body, a magnetic attraction assembly and a magnetic buffer assembly. The body includes an upper part, a bending part and a lower part. The upper part is coupled with the bending part. The bending part is coupled with the lower part. When an included angle between the upper part and the lower part is 0 degree, the magnetic attraction assembly attracts. When the included angle between the upper part and the lower part is greater than or less than 180 degrees, members of the magnetic buffer assembly repel each other. The present disclosure further relates to another two kinds of foldable terminals.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: October 29, 2019
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventors: Yugui Lin, Jiao Cheng, Weibin Yu
  • Patent number: 10324499
    Abstract: Systems and methods for active pop-up finger access in a portable information handling system. The portable system may include a housing having a first housing portion and a second housing portion rotationally coupled by a hinge. The first housing portion may include an electromagnet disposed proximate a front portion of the first housing portion. The second housing portion may include a finger access feature proximate a front portion of the second housing portion and a second magnet disposed proximate the front portion of the second housing portion. The processor may, when a sensor detects a finger of a user proximate the finger access feature, activate the electromagnet to create a magnetic repulsion force with the first magnet. The magnetic repulsion force may cause the portable information handling system to move from a closed position to a finger access open position.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: June 18, 2019
    Assignee: Dell Products L.P.
    Inventors: Giray Kaya, Bo Hom
  • Patent number: 10061348
    Abstract: A portable electronic device including a body, a stand, and first and second magnetic assemblies is provided. The stand is pivoted to the body to rotate and being opened or closed relative to the body. The first magnetic assembly having a first magnetic dipole is movably disposed in the body. The second magnetic assembly having a second magnetic dipole is disposed on the stand. When the stand is closed to the body, the first and second magnetic dipoles correspond to each other, and produce a first and second corresponding states. In the first corresponding state, magnetic poles with opposite polarities of the first and second magnetic dipoles correspond to and attract each other. In the second corresponding state, magnetic poles with the same polarity of the first and second magnetic dipoles correspond to and repel each other, and the stand is spread relative to the body due to the repulsion.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: August 28, 2018
    Assignee: Acer Incorporated
    Inventors: Chao-Di Shen, Yan-Lin Kuo, Kai-Lin Chang
  • Patent number: 9933815
    Abstract: An electronic device includes a display module, a movable member, a base, and a biasing element. The display module has a housing and a guiding member fixed thereto. The guiding member has an angled surface, and the housing has an opening. The movable member is disposed in the display module and has a through hole. The biasing element is disposed in the through hole and adjacent to the angled surface. The base has a main body and a connecting member, wherein the connecting member is connected to the main body and detachably connected to the display module. When the connecting member is inserted into the display module through the opening along a first direction, the connecting member pushes the movable member to move along a second direction with respect to the housing, and the movable member forces the biasing element to contact the connecting member.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: April 3, 2018
    Assignee: ACER INCORPORATED
    Inventors: Yu-Chin Huang, Chien-Yun Hsu, Po-Yi Lee, Yu-Nan Lin, Huei-Ting Chuang
  • Patent number: 9864402
    Abstract: A portable electronic device utilizes a control unit for controlling a power unit to provide electricity for an electromagnetic component to generate a first active magnetic property for magnetically repulsing or magnetically attracting a moving magnetic component with a first magnetic property, so as to drive the moving magnetic component to move to a first position when the control unit determines an included angle between a first module and a second module is greater than a predetermined angle. When the moving magnetic component is located at the first position, a pivoting mechanism disposed between a supporting frame and the second module drives the supporting frame to pivotally unfold relative to the second module, so as to support the second module on a supporting surface, which prevents the second module from falling.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: January 9, 2018
    Assignee: Wistron Corporation
    Inventors: Chen-Yi Liang, Ming-Ju Hsieh
  • Patent number: 9829922
    Abstract: A flexible display includes a flexible substrate, a metal material coupled to the flexible substrate, and at least one electromagnet coupled to the flexible substrate. The electromagnet generates a force to attract the metal material when the flexible substrate changes from a first state to a second state. The force assists in holding the flexible substrate in the second state, which may be a rolled state, folded state, or another changed state. The flexible substrate includes a display area corresponding to a plurality of pixels for generating an image.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: November 28, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jun Woo Hong, Hae Kwan Seo
  • Patent number: 9753498
    Abstract: An auxiliary opening and closing mechanism includes a moving magnetic component, an electromagnetic component, a fixing magnetic component, a detecting unit, a power unit, and a control unit. The electromagnetic component and the moving magnetic component are disposed in one of a display module and a host module of a portable electronic device. The fixing magnetic component is disposed in the other one of the display module and the host module. The detecting unit is for detecting a disposing angle of the portable electronic device. The control unit controls the power unit to provide a current for the electromagnetic component according to the disposing angle, so that the electromagnetic component drives the moving magnetic component to move to a first position for generating a magnetic attracting force between the moving magnetic component and the fixing magnetic component to attach the monitor module and the host module to each other.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: September 5, 2017
    Assignee: Wistron Corporation
    Inventors: Chen-Yi Liang, Jui-Hung Sun, Ming-Ju Hsieh
  • Patent number: 9746885
    Abstract: A first housing with a polar magnet on a first side. The first housing can include an opening on the first side. A second housing can include a sliding latch. An opposite polar magnet attached to the sliding latch. The polar magnet attracts the opposite polar magnet on the sliding latch to move the sliding latch to a latched position.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: August 29, 2017
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michael Delpier, Stacy L Wolff, Kevin L Massaro, Daniel Koelker, Steven Jacobs, Dimitre Mehandjiysky
  • Patent number: 9656049
    Abstract: A subcutaneous pump is provided to drain excess patient fluid from a first bodily location and discharge into a second bodily location. The pump is made from elongated flexible tube, an anchor, a check valve and then also magnetic or magnetizable material. The tube extends between a fenestrated intake end left loose in the first location (eg., peritoneal cavity) and a discharge end for the second location (eg., stomach or bladder). The anchor affixes the discharge end into the second location. The tube furthermore has a specified medial zone to be embedded in the subcutaneous layer of the patient's abdominal wall. The check valve is disposed inside the tube anywhere between the medial zone and the discharge end. The magnetic or magnetizable material is disposed in or around the specified medial zone and adapted to induce fluid pumping through the specified medial zone in response to an applied magnetic field.
    Type: Grant
    Filed: April 16, 2016
    Date of Patent: May 23, 2017
    Inventors: Mubashir H. Khan, Jesse G. Taylor, Qasim Khalil
  • Patent number: 9339636
    Abstract: A subcutaneous pump is provided to drain excess patient fluid from a first bodily location and discharge into a second bodily location. The pump is made from elongated flexible tube, an anchor, a check valve and then also magnetic or magnetizable material. The tube extends between a fenestrated intake end left loose in the first location (e.g., peritoneal cavity) and a discharge end for the second location (e.g., stomach or bladder). The anchor affixes the discharge end into the second location. The tube furthermore has a specified medial zone to be embedded in the subcutaneous layer of the patient's abdominal wall. The check valve is disposed inside the tube anywhere between the medial zone and the discharge end. The magnetic or magnetizable material is disposed in or around the specified medial zone and adapted to induce fluid pumping through the specified medial zone in response to an applied magnetic field.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: May 17, 2016
    Inventors: Mubashir H Khan, Jesse G. Taylor, Qasim Khalil
  • Patent number: 9277661
    Abstract: Magnetic latch mechanisms are provided. The latch mechanisms may be employed to releasably hold a portable computing device in a closed configuration. The latch mechanism may include first and second magnetic members that may be respectively coupled to the base and lid of the portable computing device. One of the magnetic members may be moveable. Accordingly, when the moveable magnetic member is moved, the position of the magnetic members relative to one another changes, which alters a magnetic interaction therebetween. For example, attractive portions of the magnetic members may be moved away from one another. Additionally, repulsive portions of the magnetic members may be moved into proximity. Thus, opening of the lid of the portable computing device may be facilitated.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: March 1, 2016
    Assignee: Apple Inc.
    Inventors: Bartley K. Andre, Christiaan A. Ligtenberg
  • Patent number: 9269482
    Abstract: Magnetic structure production may relate, by way of example but not limitation, to methods, systems, etc. for producing magnetic structures by printing magnetic pixels (aka maxels) into a magnetizable material. Disclosed herein is production of magnetic structures having, for example: maxels of varying shapes, maxels with different positioning, individual maxels with different properties, maxel patterns having different magnetic field characteristics, combinations thereof, and so forth. In certain example implementations disclosed herein, a second maxel may be printed such that it partially overwrites a first maxel to produce a magnetic structure having overlapping maxels. In certain example implementations disclosed herein, a magnetic printer may include a print head comprising multiple parts and having various properties. In certain example implementations disclosed herein, various techniques for using a magnetic printer may be employed to produce different magnetic structures.
    Type: Grant
    Filed: August 16, 2014
    Date of Patent: February 23, 2016
    Assignee: CORRELATED MAGNETICS RESEARCH, LLC.
    Inventor: Larry W. Fullerton
  • Patent number: 9239595
    Abstract: A connecting mechanism for connecting an electronic device to a docking station includes a first socket, a first magnet, a fixing member, a first magnetic induction member, a first engaging member and a first driving member. The first socket is movably disposed in the electronic device and a first engaging recess is formed on a side of the first socket. The first magnet is disposed in the first socket. The fixing member is disposed on the docking station. The first magnetic induction member is disposed on the fixing member and corresponding to the first magnet. The first engaging member is movably disposed on the fixing member and has a first engaging portion. The first driving member is disposed between the fixing member and the first engaging member.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: January 19, 2016
    Assignee: Wistron Corporation
    Inventor: Chen-Yi Liang
  • Patent number: 9176901
    Abstract: Flux fountain techniques are described. In one or more implementations, an apparatus includes a cover configured to be disposed over at least a portion of a display device of a computing device that is configured as a tablet and a connection portion attached to the cover using a flexible hinge. The connection portion is configured to be physically coupled to the computing device using a magnetic coupling device. The magnetic coupling device includes a first magnet that is disposed in the connection portion such that a magnetic field is aligned along an axis and second and third magnets are disposed in the connection portion at opposing sides of the first magnet from each other. The second and third magnets have respective magnetic fields that are aligned along a respective axis that is substantially perpendicular to the axis of the magnetic field of the first magnet.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: November 3, 2015
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: David Otto Whitt, III, Robyn Rebecca Reed McLaughlin, Summer L. Schneider, Eric Joseph Wahl, James H. Wise, Camilo Leon, Karsten Aagaard, Thomas Charles Oliver
  • Patent number: 9161469
    Abstract: A portable electronic apparatus includes a main body having a top surface on which a keypad is exposed and a bottom surface disposed opposite to the top surface, a display unit disposed to be hinge-connected to the main body to rotate 360 degrees, and having a front surface to display images and a rear surface disposed opposite to the top surface, and a position fixing unit to fix the main body and the display unit at a first position where the top surface of the main body and the front surface of the display unit are in contact with each other and at a second position where the bottom surface of the main body and the rear surface of the display unit are in contact with each other by using a magnetic force.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: October 13, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Jae-uk Han
  • Patent number: 9018942
    Abstract: A magnetically-based position sensor. The sensor includes a magnet assembly that moves along a path, a common collector, one or more magnetic sensing elements, a first variable collector, and a second variable collector. The one or more magnetic sensing elements are coupled to the common collector. The first and second variable collectors are coupled to one of the one or more magnetic sensors and are configured to collect a magnetic field. The first and second variable collectors are positioned to transmit some of the magnetic flux generated by the magnet assembly as the magnet assembly moves along the path. The first variable collector and the second variable collector have a geometry and orientation such that the flux collected by the first and second variable collectors varies as the magnet moves along the path.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: April 28, 2015
    Assignee: Bourns, Inc.
    Inventor: James Gregory Stanley
  • Publication number: 20150062770
    Abstract: Bi-stable permanent magnet actuation is a technique employed to move and magnetically hold an armature in electromechanical devices including some valves, wherein, permanent magnets are employed in a manner that places their magnetic field in a bi-stable state to allow a control coil to divert the permanent magnet's magnetic field in one of two directions within the surrounding magnetic material. Control is established using an actuation system comprising, a power source to deliver the desired level of energy, a voltage conditioner such as a DC/DC converter matched to the power source and electromechanical device, an energy storage device such as a capacitor, an output circuit such as an H-Bridge switching circuit, and a control circuit for controlling delivery of short duration current pulses from the energy storage device through the output circuit to the electromechanical device's control coil. Thus, an energy efficient bi-stable permanent magnet actuation system is produced.
    Type: Application
    Filed: September 2, 2013
    Publication date: March 5, 2015
    Inventor: Glen A. Robertson
  • Patent number: 8797023
    Abstract: Provided is a coercive-force specifying apparatus capable of creating a demagnetization curve for each divisional area of a coercive-force distributed magnet without breaking the coercive-force distributed magnet and of specifying an average coercive force for each divisional area precisely. A coercive force specifying apparatus of the present invention includes: a yoke including an insertion space into which a coercive-force distributed magnet is to be inserted; a magnetizing coil; a search coil that detects a magnetization change when the magnetic field is applied to the coercive-force distributed magnet; and a tracer that creates a demagnetization curve on a basis of a voltage value generated due to the magnetization change. The end face is provided with two or more loop-shaped thread grooves bored therein, the search coil being provided in each thread groove.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: August 5, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masafumi Suzuki, Tomonari Kogure, Mayumi Nakanishi
  • Patent number: 8547086
    Abstract: There is provided a coercivity performance determination device for a coercivity distribution magnet that is capable of determining, in a short period of time, with precision, and at as low a testing cost as possible, whether or not each part of one coercivity distribution magnet has a coercivity that is equal to or greater than the required coercivity. A coercivity determining device of the present invention comprises: a substantially C-shaped magnetic body; excitation means that generates a magnetic flow in the magnetic body; and a flux meter that measures the residual magnetic flux of the coercivity distribution magnet. Protrusions are provided at corresponding positions on two opposing end faces of the magnetic body, and the coercivity distribution magnet is held between the two protrusions to form an annular magnetic circuit. An external magnetic field generation means is formed by magnetic regions caused by the protrusions and non-magnetic regions comprising the air in the periphery thereof.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: October 1, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masafumi Suzuki, Mayumi Nakanishi
  • Patent number: 8493062
    Abstract: According to the present invention, a method for determining coercivity of a coercivity distribution magnet, whereby coercivity of each portion in the coercivity distribution magnet can be determined with good accuracy without, for example, cutting the coercivity distribution magnet into pieces and thus quality assurance can be achieved with good accuracy, is provided.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: July 23, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomonari Kogure, Mayumi Nakanishi
  • Patent number: 8400760
    Abstract: A power distribution device may include an input port configured to receive power form a power source, a plurality of sockets arranged along a first plane to from a matrix, each of the plurality of sockets including first and second terminals, the first terminals coupled to the input port, the first and second terminals of each of the plurality of sockets configured to deliver the power therebetween upon coupling to a connection device, and a plurality of output ports aligned along a second plane, each of the plurality of output ports coupled to the second terminal of one of the plurality of sockets, the plurality of output ports configured to distribute the power to one or more power loads.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: March 19, 2013
    Assignee: Transtector Systems, Inc.
    Inventors: Matt Howard, Matt Hepler
  • Patent number: 8379363
    Abstract: A bulk erase tool to erase a perpendicular media recording (PMR) disk of a disk drive is disclosed. The bulk erase tool comprises a housing to receive a disk drive and at least one of a first pair of magnets mounted in the housing to be positioned above the received disk drive to provide a magnetic field to erase the top side of the disk and a second pair of magnets mounted in the housing to be positioned below the disk drive to provide a magnetic field to erase the bottom side of the disk.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: February 19, 2013
    Assignee: Western Digital Technologies, Inc.
    Inventors: Pusphanathan Kolunthavelu, Anandan Vengadasalam
  • Patent number: 8213149
    Abstract: A stack of ferromagnetic sheets is gripped, lifted, and transported by first engaging with an uppermost sheet of the stack a plurality of magnet assemblies of a magnetic grab, each assembly having at least one electromagnet, then electrically energizing the electromagnets and lifting the stack with the grab while monitoring a magnetic flux of each electromagnet. A controller then compares the fluxes of the electromagnets, and varies the electrical energization of at least one of the electromagnets such that the fluxes of all the electromagnets are generally equal. The system has at least one flux sensor on each of the magnet assemblies and connected to the controller.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: July 3, 2012
    Assignee: Thyssenkrupp Millservices & Systems GmbH
    Inventors: Thomas Gerd Pohl, Wilhelm Cassing, Joachim Hoppen, Falk Steger
  • Patent number: 8134435
    Abstract: Aspects relate to mitigation of a magnetic field produced by one or more units to be shipped such that a magnitude of magnetic field measured is maintained at or below a threshold level. A counter-flux is applied through the use of one or more magnets, magnet arrays, or a geometrical arrangement of magnet arrays. The strength of the counter-flux is varied by altering size, shape, number, polarity and/or location of the one or more magnets or magnet arrays. The one or more magnets or magnet arrays can be constructed as standard assemblies and/or customized magnet assemblies. Additionally, magnet tiles or configurations can provide a return path for stray field leakage and mitigation. Additionally or alternatively, the placement and orientation of the magnets or magnet arrays allows the flux of one or more units to be mitigated, thus, allowing more than one unit to be shipped at the same time.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: March 13, 2012
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: John Floresta, Nandakumar Thirunarayan, Fred Sommerhalter
  • Publication number: 20110299054
    Abstract: A displacement device with a first and second part which are displaceable relative to one another, the first part being provided with a system of magnets, the second part being provided with a set of coil block units including: at least three first coil block units having current conductors oriented parallel to a second direction, at least two second coil block units having current conductors oriented parallel to a first direction, wherein the displacement device includes a controller configured to control the position of the second part relative to the first part, and wherein when the second part mainly moves in the second direction the controller is configured to levitate the second part from the first part in the third direction by using first coil block units only.
    Type: Application
    Filed: May 11, 2011
    Publication date: December 8, 2011
    Applicant: ASML NETHERLANDS B.V.
    Inventors: Johannes Hubertus Antonius VAN DE RIJDT, Joost Jeroen Ottens, Marcus Martinus Petrus Adrianus Vermeulen, Erik Johannes Antonius Manders
  • Publication number: 20110279944
    Abstract: The movement of magnetically responsive nanoparticles through a membrane is significantly enhanced by varying the direction of the magnetic field gradient at the membrane. A device for generating the varying-gradient magnetic field includes a primary magnet having a primary magnetic field gradient direction, one or more secondary magnets directed at an acute angle relative to the primary magnetic field gradient direction, and a controller connected to at least the secondary magnets. The controller is operable to repetitively vary the direction of the resultant magnetic field gradient in a pulsating manner.
    Type: Application
    Filed: July 22, 2011
    Publication date: November 17, 2011
    Inventors: Charles E. Seeney, William A. Yuill
  • Patent number: 7933109
    Abstract: Disclosed is an electromagnetic switching device including a number of fixed contact pieces, a solenoid-operated mechanism, a contact support which can be moved counter to restoring devices in at least one embodiment, with the aid of the solenoid-operated mechanism and on which a number of movable contact pieces are arranged, and an off stop for the contact support. A sensor is provided, in at least one embodiment, for detecting the position of the contact support while a control unit is provided which is connected to the sensor and regulates and/or controls the solenoid-operated mechanism during a switch-off process in order to decelerate the contact support before the same hits the off stop. Also disclosed is a method for operating such a switching device. The contact support, in at least one embodiment, transmits only a small momentum to the off stop, thus reducing the load applied to the involved parts. Such a switching device therefore has a longer service life than conventional switching devices.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: April 26, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Norbert Mitlmeier, Diethard Runggaldier
  • Patent number: 7929268
    Abstract: An exciting voltage arithmetic portion calculates an exciting voltage of an electromagnet using a signal of a gap sensor. On the other hand, a sensorless exciting voltage arithmetic portion calculates an exciting voltage of the electromagnet using a signal of the current sensor. The exciting voltage adjusting portion adjusts a mixing ratio between an output value of an exciting voltage arithmetic portion and an output value of the sensorless exciting voltage arithmetic portion corresponding to a gap length. The excitation of the electromagnet is controlled according to an output value of the exciting voltage adjusting portion so as to reduce influences of noises on the gap sensors thereby always achieving a stable levitation control.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: April 19, 2011
    Assignee: Toshiba Elevator Kabushiki Kaisha
    Inventor: Mimpei Morishita
  • Publication number: 20100275934
    Abstract: The present invention provides an accurate and real-time acquisition and monitoring of three-dimensional location information about a target, in particular a target inside a subject's body during a medical procedure. This is achieved in accordance with the invention by marking the target location by a small-size location marker, which can be detected and located with high signal-to-noise ratio of the detection by a detection system located at a distance from the target. Provided by the invention is a location marker, a target location system utilizing such marker, and also a novel antenna system suitable to be used in the target location system. The marker of the present invention is a passive electronic device, which “responds” to an external high radio frequency electromagnetic field by a periodic time pattern of a single (certain fixed value) relatively low frequency, as compared to the known devices of the kind specified emitting a frequency coded signal.
    Type: Application
    Filed: July 8, 2010
    Publication date: November 4, 2010
    Applicant: TOPSHOOTER MEDICAL IMRI LTD.
    Inventor: Hanan Keren
  • Patent number: 7593210
    Abstract: One or more pairs of magnet assemblages (14 and 16) are provided with magnetized segments (21-30) arranged in a Halbach-like array. The magnet assemblages (14 and 16) define a gap (18) through which magnetic data storage media (12) pass in a direction (20) across the segments (21-30). The magnetized sides (36) of the magnet assemblages (14 and 16) face each other thereby creating strong magnetic fields which degauss the magnetic data storage media (12) passing through the gap (18).
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: September 22, 2009
    Assignee: Data Security, Inc.
    Inventor: Robert A. Schultz
  • Patent number: 7583500
    Abstract: A magnetic latch for a display of a laptop computer is disclosed. The latch uses magnetic attraction to maintain the display closed and uses magnetic repelling forces to pop-up the display when opened. The latch includes one or more magnetic elements in the body of the laptop and at least one magnetic element in the display. When the display is closed, the magnet element in the display is positioned adjacent the magnet element in the body having an opposite polarity so that the magnet elements are attracted to one another. To pop-up the display, the user moves the magnetic element in the display so that it meets the magnetic pole in the body having the same polarity. When these meet, the repelling force between them causes the display to open slightly so that a user can then readily open the display.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: September 1, 2009
    Assignee: Apple Inc.
    Inventors: Chris Ligtenberg, Brett Degner
  • Patent number: 7492567
    Abstract: An exemplary electromagnetic induction switch includes a coil, a magnet suspended in the coil, a rectification circuit, and a relay-switch. The coil is connected between two input terminals of the rectification circuit. Two output terminals of the rectification circuit are respectively connected to two relay leads of the relay-switch. One of two switch leads of the relay-switch is connected to a working circuit, and another one of the switch leads of the relay-switch is connected to the working circuit via a power source, thereby controlling the power source supplying power to the working circuit.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: February 17, 2009
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Ming-Chih Hsieh
  • Patent number: 7486496
    Abstract: A method for operating an electromagnetic operating mechanism includes, upon application of a control voltage, resetting and initializing a control circuit and starting a charging of a charge storage device. Subsequently, an auxiliary tripping coil and a main tripping coil are sequentially briefly energized, and, if no current flow occurs through at least one of the tripping coils, the control voltage is permanently disconnected. If a current flow occurs through each of the tripping coils, a closing coil is energized so as to move the armature to an attracted position, and the closing coil is subsequently de-energized. Subsequently, sequentially briefly energizing the auxiliary tripping coil and the main tripping coil are sequentially briefly energized without affecting the armature. Upon removal of the control voltage, the charge storage device is discharged through the main tripping coil so as to move the armature to the dropped-out position.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: February 3, 2009
    Assignee: Moeller GmbH
    Inventors: Berthold Gauxmann, Holger Neubert, Thomas Roschke
  • Publication number: 20080192402
    Abstract: Disclosed is an electromagnetic switching device including a number of fixed contact pieces, a solenoid-operated mechanism, a contact support which can be moved counter to restoring devices in at least one embodiment, with the aid of the solenoid-operated mechanism and on which a number of movable contact pieces are arranged, and an off stop for the contact support. A sensor is provided, in at least one embodiment, for detecting the position of the contact support while a control unit is provided which is connected to the sensor and regulates and/or controls the solenoid-operated mechanism during a switch-off process in order to decelerate the contact support before the same hits the off stop. Also disclosed is a method for operating such a switching device. The contact support, in at least one embodiment, transmits only a small momentum to the off stop, thus reducing the load applied to the involved parts. Such a switching device therefore has a longer service life than conventional switching devices.
    Type: Application
    Filed: June 16, 2005
    Publication date: August 14, 2008
    Inventors: Norbert Mitlmeier, Diethard Runggaldier
  • Patent number: 7345560
    Abstract: A method of making a permanent magnet body is provided. The method includes providing a first precursor body comprising a plurality of blocks and magnetizing the first precursor body to form a first permanent magnet body. A recoil magnetization pulse may be applied to the permanent magnet body after the magnetization. The precursor body may be heated during magnetization. A power supply containing a battery may be used to energize a pulsed magnet used to magnetize the precursor body.
    Type: Grant
    Filed: October 10, 2003
    Date of Patent: March 18, 2008
    Assignee: General Electric Company
    Inventors: Evangelos Trifon Laskaris, Liang Li, Kathleen Melanie Amm, Juliana Chiang Shei, Bulent Aksel, Mark Gilbert Benz, Gerald Burt Kliman, Paul Shadworth Thompson, Israel Samson Jacobs, Harold Jay Patchen
  • Patent number: 7324320
    Abstract: A device for magnetizing a magnet system preferably having several pulse-generator circuits which are mutually arranged so that their magnetic fields superimpose in a cumulative manner. Each pulse-generator circuit includes a capacitor element, a magnetization coil electrically connected to the capacitor element and a switch element by way of which actuation the magnetization coil can be impinged with a current pulse of a limited pulse duration arising by the discharge of the capacitor element, and thus the build-up of a magnetic field may be triggered. The pulse-generator circuit is built up so that the pulse duration of the current pulse is limited to a value between 10 ?s and 500 ?s. With such short pulse durations, undesirable heating of the magnetization coil is short so that the device may be applied in automatic production installations with cycle times of below 1 s.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: January 29, 2008
    Assignee: Albert Maurer
    Inventors: Albert Maurer, Urs Meyer, Stefan Haas, Olivier Mueller
  • Publication number: 20070242406
    Abstract: Methods and apparatus generate electricity through the operation of a circuit based upon a single magnetic flux path. A magnetizable member provides the flux path. One or more electrically conductive coils are wound around the member, and a reluctance or flux switching apparatus is used to control the flux. When operated, the switching apparatus causes a reversal of the polarity (direction) of the magnetic flux of the permanent magnet through the member, thereby inducing alternating electrical current in each coil. The flux switching apparatus may be motionless or rotational. In the motionless embodiments, two or four reluctance switches are operated so that the magnetic flux from one or more stationary permanent magnet(s) is reversed through the magnetizable member.
    Type: Application
    Filed: April 16, 2007
    Publication date: October 18, 2007
    Inventors: Theodore C. Annis, J. Patrick Eberly
  • Patent number: 7211909
    Abstract: A monolithic integrated circuit arrangement containing a substrate, a functional unit formed in and/or on the substrate, and an energy supply unit, which is formed in and/or on the substrate and is coupled to the functional unit and has an inductance and a permanent magnet. The inductance and the permanent magnet are arranged such that, under a vibration on the circuit arrangement, the permanent magnet is moved relative to the inductance such that an electrical induced voltage for supplying the functional unit with electrical energy is induced by the inductance.
    Type: Grant
    Filed: March 5, 2004
    Date of Patent: May 1, 2007
    Assignee: Infineon Technologies AG
    Inventor: Gunther Schindler
  • Patent number: 6891710
    Abstract: Method for control of a proportional magnet comprising a magnet core, a magnet armature, a magnet coil for operating a control element in a shift valve or a proportional pressure-control valve, particularly a pressure-control valve for clutch operation in an automatic motor vehicle transmission, and comprising an electronic control device, whereby the magnet core may be moved back and forth between a control region and a hold region with a magnetic hold position of the magnet armature and a defined transition from the control region to the hold position may be executed and whereby mechanisms are provided for recognition of the movements of the magnet armature.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: May 10, 2005
    Assignee: ZF Friedrichshafen AG
    Inventors: Karlheinz Mayr, Markus Eisele, Robert Ingenbleek, Walter Kill, Hubert Remmlinger, Jochen Fischer, Bernd Fessler
  • Publication number: 20040246647
    Abstract: A monolithic integrated circuit arrangement containing a substrate, a functional unit formed in and/or on the substrate, and an energy supply unit, which is formed in and/or on the substrate and is coupled to the functional unit and has an inductance and a permanent magnet. The inductance and the permanent magnet are arranged such that, under a vibration on the circuit arrangement, the permanent magnet is moved relative to the inductance such that an electrical induced voltage for supplying the functional unit with electrical energy is induced by the inductance.
    Type: Application
    Filed: March 5, 2004
    Publication date: December 9, 2004
    Applicant: Infineon Technologies AG
    Inventor: Gunther Schindler
  • Patent number: 6741440
    Abstract: A magnetization method and apparatus is described as utilizing a pair of mechanically counter-vibrated permanent magnets having mutually facing unlike magnetic poles, and wherein a ferromagnetic article, or article containing ferromagnetic elements in close-set array, is placed for subjection to pulsed magnetizing flux between the pair of counter-vibrated magnets. Uses of the invention include making magnets and modifying the current drain property of a multi-plate nickel-metal hydride battery.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: May 25, 2004
    Inventor: Robert Neville O'Brien
  • Patent number: 6683776
    Abstract: A magnetic field-producing device is used for non-contact type elevation, elevation maintenance, or manipulation of objects. This type of elevation, elevation maintenance, or manipulation of objects contributes to the present modes of flight and people and larger object transport including but not limited to rotary-wing or non-rotary-wing modes of flying and mechanical/electronic modes of object movement.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: January 27, 2004
    Inventor: William Redvers Belisle
  • Patent number: 6678182
    Abstract: A module is formed in which semiconductor components are soldered to an electrically conductive heat sink. The electrically conductive heat sink is formed so that it will serve as an electrical bus in an electronic device. The chips of the semiconductor component are metallurgically bonded to the surface of the heat sink. The heat sink uses a heat transfer fluid that flows through an interior of the heat sink, the interior containing an internal element. In the preferred embodiment, the internal element is a plurality of silver plated copper balls. The copper balls are brazed to each other and to the walls of the heat sinks in an assembly process. The heat sink housing will typically be made from copper, with one surface made from molybdenum so that the expansion and contraction of the heat sink housing molybdenum surface will be similar to that of the silicon substrate of the chips, thereby avoiding the problem of the chip substrate cracking and breaking due to thermal flexing.
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: January 13, 2004
    Assignee: United Defense LP
    Inventors: Craig Joseph, Kelly W. Arnold, T. James Dorsch, Anthony C. Evans
  • Patent number: 6542348
    Abstract: A method and system for driving a magnetizing fixture. A driving circuit produces in the conductor of a magnetizing fixture a first current whose magnitude increases substantially linearly with time, then produces a substantially constant current in the same direction, then produces a current in the same direction whose magnitude decreases substantially linearly with time, thereby forming a substantially trapezoidal magnetization current waveform having symmetrical sides. The circuit comprises a first energy storage device for supplying electrical energy to the magnetizing fixture, a second energy storage device for receiving electrical energy from the magnetizing fixture, and a commutator interconnecting the first energy storage device, the second energy storage device and the magnetizing fixture for stopping the flow of electrical energy into the magnetizing fixture from the first energy storage device and starting the flow of energy from the magnetizing fixture into the second energy storage device.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: April 1, 2003
    Inventor: Joseph J. Stupak, Jr.
  • Publication number: 20020064015
    Abstract: Process for polarizing at least a part of a ferroelectric material in a cylindrical shape having a longitudinal axis, and having an internal conductor inside the cylinder disposed along the longitudinal axis. At least part of said cylinder is placed in a conductive liquid with the cylinder being free from any stresses other than pressure exerted by the conductive liquid. A low frequency AC voltage is then applied between an electrode in contact with the conductive liquid and the internal conductor, and the amplitude of the voltage is increased progressively up to a value such that an electrical field is created having an amplitude greater than a coercive field of polarization Ec of the ferroelectric material.
    Type: Application
    Filed: April 25, 2001
    Publication date: May 30, 2002
    Inventor: Francois Bauer