Solenoid And Core Type Patents (Class 310/14)
  • Patent number: 8901783
    Abstract: Techniques for providing directional force induction in a handheld device for use in, e.g., personal navigation applications. In an exemplary embodiment, a magnetic element is provided on a mechanical support fixedly attached to a chassis of the handheld device. One or more conducting coils surround the support. Current is generated in the one or more conducting coils to accelerate the magnetic element relative to the support, causing a tactilely perceptible force to a user of the handheld device due to the recoil of the chassis from the movement of the magnetic element. In an exemplary embodiment, passive movement of the magnetic element due to, e.g., physical jostling of the handheld device, may be used to deliver energy back to the system for energy harvesting.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: December 2, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Sherman A. Gregory, Martin H. Renschler
  • Patent number: 8890378
    Abstract: An electrical power supply device (10) for electrically powering equipment on a rotary rotor (2) of an aircraft (1), which rotor is driven by a shaft (5), said device (10) comprising a removable stick (11). The stick (11) includes an upper alternator (20) and an upper tube (12) secured to said shaft (5) so as to be constrained in rotation therewith, said upper alternator (20) having a plurality of upper coils (21) fastened to an upper inside peripheral surface (12?) of said upper tube (12), said stick (11) having a rod (13) carrying an upper permanent magnet (22), said device (10) having a mechanism (30) so that said rod (13) and said upper tube (12) move with distinct rotary movements, said mechanism (30) having connection means (31) so as to be connectable to a reference member (8, 9) of an aircraft (1).
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: November 18, 2014
    Assignee: Airbus Helicopters
    Inventors: Vincent Bourget, Serge Giordano, Nicolas Imbert, Charles Chuc
  • Patent number: 8866349
    Abstract: A solenoid includes a stationary member, a movable member being movable relative to the stationary member and spring disposed between the stationary member and the movable member. The stationary member includes a housing with an end wall and a side wall, a first permanent magnet attached to the end wall, a second permanent magnet attached to the side wall and a magnetic flux concentrator configured to concentrate a magnetic field generated by the second permanent magnet with a magnetic field generated by the first permanent magnet. The movable member includes a head inserted into the housing. The head is made of magnetically conductive material. The stationary member further includes a coil surrounding the head of the movable member. When the coil receives a pulse current, the movable member is driven from an extended/retracted position to a retracted/extended position.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: October 21, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Yue Li, Jin Yun Gan, Chui You Zhou, Yong Wang, Xiao Ning Zhu
  • Patent number: 8826646
    Abstract: A fluid delivery device, in particular for delivering exhaust gas posttreatment media, such as a urea-water solution, for an internal combustion engine, includes a movable work wall, in particular a work diaphragm. A work chamber is provided for a fluid that is to be delivered via at least one fluid connection. The work chamber is capable of being increased and decreased in size by means of the movable work wall, the at least one fluid connection, and at least one mechanism for moving the work wall upon an intake stroke and a compression stroke. The at least one mechanism is embodied such that the force for moving the work wall both in the intake stroke and in the compression stroke includes a Lorentz force.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: September 9, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Christoph Waletzek, Peter Holek, Ralph Schmidt
  • Patent number: 8786143
    Abstract: A magnetically actuated reciprocating motor utilizes the stored energy of permanent magnets and an electromagnetic field to reciprocally drive a magnetic actuator. A converting mechanism converts the reciprocating motion of the magnetic actuator to rotary motion for powering a work object. A solenoid, comprising a nonferromagnetic spool having a tubular center section with a coil of wire wrapped around the center section, is connected to a source of power and a switching mechanism. The magnetic actuator has permanent magnets disposed inside a tubular shaft at each end thereof. The switching mechanism switches the magnetic polarity at the ends of the solenoid to alternatively repel and attract the permanent magnets. The shaft is reciprocatively received through the center section of the solenoid. A controlling mechanism interconnects an output shaft, rotatably powered by the magnetic actuator, and the switching mechanism to switch the polarity of the solenoid to drive the magnetic actuator.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: July 22, 2014
    Inventor: Kendall C. Gosvener
  • Patent number: 8742632
    Abstract: A linear motor includes an assembly of two magnets separated by a non-magnetic spacer wherein the assembly is coaxially affixed inside of a housing, which results in an air gap therebetween. The magnets are positioned to have a same direction of magnetization. A first embodiment of the motor includes a coil carrier having a single electrical coil of two sections wound in the same direction and positioned into the corresponding two winding areas of the carrier. The coil carrier is movably positioned into the air gap and further to surround the assembly, thereby moving along an axial direction of the motor. A second embodiment includes two coils that wound in a same direction with the respective separated wires and positioned into the respective two winding areas of the coil carrier.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: June 3, 2014
    Assignee: Moticont
    Inventors: Fariborz Aaron Eghbal, Joseph Benjamin Hanukaai, Vahid David Hannani
  • Patent number: 8729747
    Abstract: A method and apparatus for motional/vibrational energy harvesting are disclosed. Embodiments of the subject invention utilize the non-resonant chaotic behavior of a free-rolling magnet to generate power. In one embodiment, the magnet can be spherical, cylindrical, or elliptical. The magnet can roll about a linear, cylindrical, helical, or cage-like track. The changing magnetic flux due to the magnet rolling about the track induces current in surrounding coils. The coils can be provided around the track using a continuous winding placement, segmented winding placement, or fractional winding placement. Multiple coil phases are also possible. For embodiments utilizing multiple magnets, spacers can be used to maintain a separation between magnets.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: May 20, 2014
    Assignee: University of Florida Research Foundation, Inc.
    Inventors: David P. Arnold, Benjamin James Bowers
  • Publication number: 20140132089
    Abstract: Disclosed herein is a linear vibration motor. The present invention relates to improvement of a magnetic circuit system of the related art in which a magnet is disposed at a central part of an inner space through a yoke and a weight and a coil is disposed centered on the magnet. The linear vibration motor according to the present invention removes the yoke by disposing the weight at the central part of the inner space and horizontally disposing the magnet and the coil centered on the weight to maximally secure the inner space, thereby facilitating the increase in a volume of the magnet, maximizing electromagnetic force, and remarkably improving a response speed.
    Type: Application
    Filed: March 14, 2013
    Publication date: May 15, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventor: Young Jae JEON
  • Patent number: 8688345
    Abstract: An electric motor includes one or more separate coil sets arranged to produce a magnetic field of the motor. The electric motor also includes a plurality of control devices coupled to respective sub-sets of coils for current control. A similar arrangement is proposed for a generator. A coil mounting system for an electric motor or generator includes one or more coil teeth for windably receiving a coil for the motor and a back portion for attachably receiving a plurality of the coil teeth. A traction control system and method for a vehicle having a plurality of wheels independently powered by a respective motor. A suspension control system and method for a vehicle having a plurality of wheels, each wheel being mounted on a suspension arm of the vehicle and being independently powered by a respective motor.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: April 1, 2014
    Assignee: Protean Electric Limited
    Inventor: Martin Boughtwood
  • Patent number: 8680723
    Abstract: A linear actuator includes a stationary part, a movable part moveably supported by the stationary part, and at least one elastic member disposed between the movable part and the stationary part. The stationary part includes a stator core with a pair of teeth extending inwardly there from, and a winding wound on each of the teeth. The movable part disposed between the teeth includes two pairs of permanent magnetic poles respectively facing the teeth and an output shaft projecting in a first direction. When the windings are electrified, the stationary part generates a magnetic field which interacts with the permanent magnetic poles to reciprocate the movable part relative to the stationary part in a second direction perpendicular to the first direction.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: March 25, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Arunkumar Subramanian, HongTao Wang, JinHui Huang
  • Patent number: 8680724
    Abstract: A linear generator has a fluid pressure cylinder structure for reciprocating a piston in a cylinder in the axial direction by applying alternately a fluid pressure in a left fluid pressure chamber in contact with the left end wall of the cylinder and a fluid pressure in a right fluid pressure chamber in contact with the right end wall of the cylinder to the piston. A permanent magnet band is formed between the left and right pressure receiving surfaces of the piston, and an electromotive coil band provided over the left and right fluid pressure chambers is formed on the cylindrical wall between the left and right end walls of the cylinder so that power generation in the electromotive coil band is induced by the reciprocating movement in the axial direction of the piston having the permanent magnet band.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: March 25, 2014
    Inventor: Takaitsu Kobayashi
  • Patent number: 8659176
    Abstract: A system for electromagnetically harvesting waste kinetic energy. A wound electrical coil having a hollow bobbin abuts an opening in ring magnet. An actuator plunger extends through the opening. Fixed magnets are located at the opposite end of the bobbin. Floating magnets are disposed within the bobbin, arranged with their magnetic field opposing that of the fixed magnets but not that of the ring magnet. Axial force on the actuator plunger moves the floating magnets toward the fixed magnets. When the actuator is released, the floating magnets are repelled by the fixed magnets and attracted by the ring magnet, causing the floating magnets to pass rapidly through the coil, thereby generating an electric current in the coil. In one application, the harvester is actuated by a keeper in a door latch release mechanism. In a second application the harvester is actuated by a latch bolt of a lock set.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: February 25, 2014
    Assignee: Hanchett Entry Systems, Inc.
    Inventor: Leland J. Hanchett, Jr.
  • Publication number: 20140042833
    Abstract: A linear vernier motor includes a stator and a mover. The stator extends in a first direction. The mover extends in the first direction and a pole interval is different from that of the stator. At least one of the stator and the mover includes: a plurality of permanent magnets arranged in the first direction and a plurality of yokes arranged in the first direction. Each of the plurality of yokes is arranged between adjacent permanent magnets. The plurality of permanent magnets is magnetized to the first direction and magnetization orientations of adjacent permanent magnets are opposite to each other.
    Type: Application
    Filed: May 16, 2012
    Publication date: February 13, 2014
    Inventors: Ryota Hiura, Katsuhiro Hirata, Hiroshi Ishiguro, Yoshihiro Nakata
  • Publication number: 20140026836
    Abstract: A housing is molded from a resin material, and a first flange portion of the bobbin forms a fusing protrusion, which is joined and fused with the housing. The housing includes through-holes, which are located on a radially inner side of the fusing protrusion and extends through a portion of the housing in the axial direction. A yoke includes at least one pressure reducing part, which is configured to reduce a pressure exerted to a projection of the bobbin by a flow of the resin material at a time of molding the housing.
    Type: Application
    Filed: July 30, 2013
    Publication date: January 30, 2014
    Applicant: DENSO CORPORATION
    Inventors: Koichiro MATSUMOTO, Yoshiyuki MURAO
  • Publication number: 20140014863
    Abstract: A direct acting solenoid actuator includes an armature and associated push pin that are suspended from certain fixed solenoid components, such as a pole piece and/or flux sleeve, by a fully floating cage of rolling elements. The fixed solenoid component may comprise a pole piece and/or a flux sleeve. The pole piece may include stops to limit movement of the cage of rolling elements in the axial direction.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 16, 2014
    Inventors: Hamid NAJMOLHODA, Matthew S. Peterson
  • Patent number: 8610320
    Abstract: A linear generator has a fluid pressure cylinder structure for reciprocating a piston in a cylinder in the axial direction by applying alternately a fluid pressure in a left fluid pressure chamber in contact with the left end wall of the cylinder and a fluid pressure in a right fluid pressure chamber in contact with the right end wall of the cylinder to the piston. A permanent magnet band is formed between the left and right pressure receiving surfaces of the piston, and an electromotive coil band provided over the left and right fluid pressure chambers is formed on the cylindrical wall between the left and right end walls of the cylinder so that power generation in the electromotive coil band is induced by the reciprocating movement in the axial direction of the piston having the permanent magnet band.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: December 17, 2013
    Inventor: Takaitsu Kobayashi
  • Patent number: 8604647
    Abstract: A linear actuating device includes a track unit having an insulating sleeve made of non-metallic material and surrounding an axis, a plurality of coils mounted spacedly and sleevingly on the insulating sleeve along the axis, and a shell containing the insulating sleeve and the coils. The linear actuating device also includes a forcer unit having an elongate member extending through the insulating sleeve, having a segment configured for connecting to a vehicle shaft, and being movable along the axis relative to the insulating sleeve. The forcer unit also includes a plurality of magnets mounted spacedly relative to the axis and sleevingly on the elongate member.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: December 10, 2013
    Assignee: Automotive Research & Testing Center
    Inventors: Tsung-Hsien Hu, Chih-Jung Yeh
  • Publication number: 20130240642
    Abstract: A magnetic actuator includes: a coil, an internal pole, an armature, and a magnetic return path system having a magnetic return path element made from a material having a two-phase structure.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 19, 2013
    Applicant: Robert Bosch GmbH
    Inventors: Anna Salvat MASSONI, Joerg ABEL
  • Publication number: 20130241320
    Abstract: An electromagnetic control device has a coil with a central axis and an interior space, and a control element that moves along the axis and is arranged at least partially within an interior space of the coil. The control element comprises an armature that axially moves to a desired position when the coil is energized. The coil is divided into at least two separate portions that are arranged axially behind one another and connected electrically in series with one another. An electric central tap is provided, between two adjacent coil portions, by which a sensor current, provided for determining an axial position of the armature, can be fed into a subset of the coil portions. When the armature is in a defined axial position, an axial end face of the armature is located within an axial area determined by an axial separation zone provided between two adjacent coil portions.
    Type: Application
    Filed: December 14, 2012
    Publication date: September 19, 2013
    Applicant: ZF Friedrichshafen AG
    Inventors: Florian WEINL, Michael LINDER
  • Publication number: 20130236337
    Abstract: A magnetomotive device has an embedded electromagnetic coil formed of multiple printed conductor segments on multiple lamina of a multilayer PCB. A shaft extends through an opening in the PCB, and a permanent magnet with axially opposed poles is secured to the shaft. Energizing the embedded electromagnet generates a magnetic field that attracts or repels the permanent magnet, driving the shaft to do useful work. A pair of embedded PCB coils may be employed, the shaft extending through both coils with the permanent magnet disposed therebetween, and the coils energized so that one repels the permanent magnet while the other attracts it, and the shaft may be driven reversibly to do useful work.
    Type: Application
    Filed: February 23, 2013
    Publication date: September 12, 2013
    Inventors: Mark A. Gummin, Howard Cohen, William Donakowski
  • Patent number: 8450886
    Abstract: There is provided a linear vibrator including: a housing having an internal space formed therein; a magnetic field unit including a yoke disposed in the internal space and having a magnet and a magnet insertion part formed therein, and interacting with a coil to which power is applied to linearly move in the internal space, the magnet insertion part determining an insertion position of the magnet; and an elastic member disposed in a space between the housing and the magnetic field unit and elastically supporting linear movement of the magnetic field unit.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: May 28, 2013
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jong Hyun Yoon, Seung Hyeon Jeong, Joon Choi, Jun Kun Choi
  • Patent number: 8427082
    Abstract: The invention relates to a method for absorbing the displacement, under the influence of an external force, of at least one plunger (10,20) in a linear electrodynamic motor comprising a least an induction coil (11, 21) magnetically coupled with the plunger. Said method comprises the steps of: detecting in said induction coil a current induced (I?ind) amplified relative to the induced current. The invention can be applied to cryogenic machines on board space ships.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: April 23, 2013
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Gerald Aigouy, Jonathan Buquet, Thierry Trollier
  • Publication number: 20130076161
    Abstract: A solenoid includes a stationary member, a movable member being movable relative to the stationary member and spring disposed between the stationary member and the movable member. The stationary member includes a housing with an end wall and a side wall, a first permanent magnet attached to the end wall, a second permanent magnet attached to the side wall and a magnetic flux concentrator configured to concentrate a magnetic field generated by the second permanent magnet with a magnetic field generated by the first permanent magnet. The movable member includes a head inserted into the housing. The head is made of magnetically conductive material. The stationary member further includes a coil surrounding the head of the movable member. When the coil receives a pulse current, the movable member is driven from an extended/retracted position to a retracted/extended position.
    Type: Application
    Filed: September 25, 2012
    Publication date: March 28, 2013
    Applicant: JOHNSON ELECTRIC S.A.
    Inventor: Johnson Electric S.A.
  • Patent number: 8395286
    Abstract: The linear vibrator includes a base forming a hollow space, a suspension fixed on the base, and an oscillating portion suspended in the hollow space by the suspension. The suspension defines a flat part, a connecting portion bent downward from the flat part, and a spring portion extended horizontally in a direction parallel to flat part from the end of the connecting portion. The suspension is directly connected with the outside component, thereby transmitting the vibration to the outside component rapidly.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: March 12, 2013
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Components Inc.
    Inventors: Hong-Fu Xu, Le-Ping Dong, Wei Zhang
  • Patent number: 8382455
    Abstract: A stator for a linear compressor is provided that includes a coil winding, in which a coil is wound in a circumferential direction and current flows; a bobbin set, which is wound with the coil winding and which insulates the coil winding; and a plurality of core blocks, which is arranged in a circumferential direction of the bobbin set at predetermined intervals from an axial direction of the bobbin set, and which is advantageously used to simplify the manufacturing process, enhance the clamping force, reduce an overall production cost, and reduce a size of a product incorporating the same.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: February 26, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jong-Koo Lee, Sangmin Lee, Seong-Yeol Hyeon
  • Patent number: 8362721
    Abstract: A battery powered raise climber system is provided that uses Lithium ion batteries to drive a single or double electric drive for an existing raise climber. The batteries offer a faster, safer, quieter and cleaner way to move workers and their equipment to and from the work face in a raise and eliminates the need for adding lengths of hose as the raise climber ascends and eliminates the emission of harmful inhalants. The battery powered system also enables high efficiency area lighting to be used at the work face, and as the raise climber descends in the raise, the electric drives can reverse operation to recharge the batteries.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: January 29, 2013
    Assignee: J.S. Redpath Limited
    Inventor: Rick T. Jylha
  • Patent number: 8350420
    Abstract: An electric motor 1 includes a rotor core 22 having n pieces of teeth T arranged in the circumferential direction around which a coil wire 23 is wound, a commutator 24 having n pieces of segments 24a 24b, and 24c, and the coil wire 23 having a connecting wire portion 23a that connects the teeth T and the segments 24a, 24b, and 24c and a crossover portion 23b that interconnects the segments 24a, 24b, and 24c at the opposite pole positions of the commutator 24 around a shaft 23. The crossover portion 23b that connects the i-th (i=1 to n) and the (i+n/2)th of the segments 24a, 24b, and 24c is wound prior to the connecting wire portion 23b that connects the teeth T connected with the i-th segment 24a, 24b, 24c and the (i+1)th segment 24a, 24b, 24c, respectively.
    Type: Grant
    Filed: December 26, 2008
    Date of Patent: January 8, 2013
    Assignee: Takata Corporation
    Inventors: Takaaki Kimura, Takahiro Mori
  • Patent number: 8351095
    Abstract: Image scan device, comprising a platen, and a carriage, the carriage comprising a scan head, and a support structure arranged to move the scan head with respect to the platen, wherein a resilient element is provided that is arranged to bias the scan head in the direction of the platen, and resilient element fully extends between the platen and the bottom of the carriage, as seen from a direction parallel to the platen.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: January 8, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Edward A Hill, Kevin Bokelman, Glenn W Gaarder, Ryan Smith
  • Patent number: 8344560
    Abstract: A magnetically actuated reciprocating motor utilizes the stored energy of rare earth magnets and an electromagnetic field provided by a solenoid to reciprocally drive a solenoid assembly. A converting mechanism, such as a connecting rod and crankshaft, converts the reciprocating motion of the solenoid assembly to power a work object. The solenoid assembly comprises a solenoid having a nonferromagnetic spool with a tubular center section and a coil of wire wrapped around the center section. A magnetic actuator has a permanent magnet at each end of an elongated shaft that is received through the center section of the spool. A switching mechanism switches magnetic polarity at the ends of the solenoid so the solenoid assembly is alternatively repelled and attracted by the permanent magnets. A controlling mechanism interconnecting an output shaft and the switching mechanism provides the timing to switch the polarity of the solenoid and reciprocate the solenoid assembly.
    Type: Grant
    Filed: July 20, 2010
    Date of Patent: January 1, 2013
    Inventor: Kendall C. Gosvener
  • Patent number: 8334624
    Abstract: A linear vibrator is disclosed. The linear vibrator includes a housing having a base and a cover, a number of elastic members connected to the housing, a vibrating unit suspended in the housing by the elastic members, and a coil positioned in the housing. The base has a bottom wall and a plurality of sidewalls extending vertically from the bottom wall. The vibrating unit has a magnet assembly and vibrates along a direction parallel to the bottom wall.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: December 18, 2012
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Components Inc.
    Inventors: Le-Ping Dong, Yong-Hua Pu
  • Patent number: 8324763
    Abstract: A magnetically actuated reciprocating motor utilizes the stored energy of magnets, particularly rare earth magnets, and an electromagnetic field to reciprocally drive a magnetic actuator. A converting mechanism, such as a connecting rod and crankshaft, converts the reciprocating motion of the magnetic actuator to rotary motion for powering a work object. A solenoid, comprising a nonferromagnetic spool having a tubular center section with a coil of wire wrapped around the center section, is connected to a source of power and a switching mechanism. The switching mechanism switches the magnetic polarity at the ends of the solenoid to alternatively repel and attract permanent magnets at the ends of the magnetic actuator. A shaft interconnecting the magnets is received through the center section of the solenoid. A controlling mechanism interconnecting an output shaft and the switching mechanism provides the timing to switch the polarity of the solenoid to drive the magnetic actuator.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: December 4, 2012
    Inventor: Kendall C. Gosvener
  • Patent number: 8294308
    Abstract: In one embodiment, a system for providing cyclic motion includes a magnetic drive having an electrically conductive coil defining a bore and a magnetic member movable through the bore. A control provides current to the coil and selectively reverses the direction of the current to move the magnetic member through the bore. In another embodiment, the system includes a counterbalance. The counterbalance includes a biasing member for reacting against a load applied to a support, and a lever arm coupled to the biasing member for varying a preload of the biasing member. In another embodiment, the magnetic drive and the counterbalance may be incorporated into an apparatus for reciprocating a person.
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: October 23, 2012
    Assignee: Bloemer, Meiser & Westerkamp, LLC
    Inventors: Edward Westerkamp, Daniel Meiser
  • Patent number: 8288898
    Abstract: A linear vibrator is disclosed. In accordance with an embodiment of the present invention, the linear vibrator includes a base, a coil unit, which is coupled to the base, a magnet, which is coupled to the coil unit such that the magnet can move relatively with respect to the coil unit, and a leaf spring, which is interposed between the magnet and the base and includes a plurality of plate-shaped members having center portions thereof being separated from one another and both respective ends thereof being coupled to one another. Thus, the linear vibrator can increase the range of displacement in the leaf spring and increase the magnitude of vibration in the linear vibrator.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: October 16, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jae-Woo Jun, Jun-Kun Choi, Hwa-Young Oh, Yong-Jin Kim, Kyung-Ho Lee, Seok-Jun Park, Kwang-Hyung Lee, Je-Hyun Bang
  • Patent number: 8284509
    Abstract: A voice coil motor includes a stationary member, a moveable member, a base, and two guide posts. The stationary member includes a stationary frame and a number of magnets fixed on the stationary frame. The stationary frame defines a first receiving room. The moveable member is received in the first receiving room and includes a barrel holder and a coil. The barrel holder defines a second receiving room for receiving a lens barrel. The coil wraps around the barrel holder. Two through holes extend from a top surface to a bottom surface of the barrel holder. The base supports the stationary member and the moveable member. The guide posts are perpendicularly fixed on the base and pass through the through holes of the moveable member.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: October 9, 2012
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Ping-Han Ku
  • Patent number: 8274184
    Abstract: A torus motor system includes a hollow stator and a rotor which is driven along a rotor path formed within the hollow stator by a magnet system. The rotor operates as a piston within the rotor path to intake and discharge fluid therefrom. The forces on the rotor all tend to center the rotor within the rotor path. The rotor is accelerated away from the inlet port on the magnet system and decelerated as the rotor approaches the discharge port.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: September 25, 2012
    Assignee: Sullair Corporation
    Inventor: Richard W. Caddell
  • Publication number: 20120235516
    Abstract: A vertical actuator drive having gravity compensation has a first subassembly and a second subassembly, one of the two subassemblies being stationary and the other of the two subassemblies being movable in the vertical direction. The first subassembly has a first magnetic yoke provided with a coil, and the second subassembly has a second magnetic yoke provided with at least one magnet which is oriented toward the coil. A horizontal gap between the first and second magnetic yoke in the region of the at least one magnet is variable in the vertical direction, so that a reluctance force acts between the first and second subassemblies in an operating range of the actuator drive, the reluctance force opposing the weight force of the movable one of the two subassemblies.
    Type: Application
    Filed: March 12, 2012
    Publication date: September 20, 2012
    Inventor: Vincent Cardon
  • Patent number: 8242641
    Abstract: A vibration motor includes a first resilient member and a second resilient member providing resilient forces in opposite directions; a first vibrator and a second vibrator coupled to the first resilient member and the second resilient member respectively; a magnetic body coupled to the first vibrator to create a magnetic field; and a coil applying a current of a predetermined frequency band in the region where the magnetic field is created.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: August 14, 2012
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Yu-Dong Bae, Eun-Hwa Lee, In-Kuk Yun, In Kim
  • Patent number: 8232688
    Abstract: A voice coil motor type focusing actuator is disclosed to have a fixed unit, a movable unit and two resilient holding members. The fixed unit has a bracket with two slide shafts and a plurality of magnets mounted in the bracket. The movable unit has a lens holder movably mounted inside the bracket and a coil wound around the lens holder. The lens holder has two lugs. Each lug has a through hole for the slide shaft of the fixed unit to insert thereinto. The resilient holding member is fastened between the bracket of the fixed unit and the lens holder of the movable unit. When a current is supplied to the coil, a magnetic force is produced between the coil and the magnets to move the movable unit. When the current stops, an elastic force due to the resilient holding unit is utilized to pull the movable unit back to its original position.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: July 31, 2012
    Assignee: Tricore Corporation
    Inventor: Tien-Chung Huang
  • Patent number: 8129870
    Abstract: An asymmetric folded spring flexure suspension system can enable an ultra-compact linear reciprocative device wherein a reciprocative mass suspended from a base by a single folded flexure assembly extends in a single generally radial direction perpendicular to the intended travel path. The folded flexure assembly can be configured as three side-by-side stacks of flexure strips of spring material, tied together at a “yoke-idler” end; at the opposite “working” end, a central stack of nominal width is tied to the mass, and, flanking the central stack, a pair of half-width stacks are tied to opposite sides of the base. In an embodiment for active vibration control, a cylindrical enclosure, of magnetically-permeable material and attached to the working end of the flexure assembly, contains a driver system including an internally-mounted pair of permanent magnets that provide a magnetic flux gap and also constitute the main portion of the mass.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: March 6, 2012
    Inventor: Kenneth E. Pusl
  • Patent number: 8130086
    Abstract: A linear vibration generator is disclosed. The linear vibration generator may include: a stator having a coil, which induces a magnetic field when an electric current is applied; an oscillator having a magnet, which has one side facing the coil; a spring member, which is joined to the stator, and which elastically supports the oscillator such that the oscillator moves linearly; a damper, which prevents the oscillator from contacting the stator according to the linear motion of the oscillator; and a guide portion, which guides the linear motion of the oscillator. This linear vibration generator makes it possible to generate stable linear vibration, prevent generation of touch noise when the oscillator impacts the stator, and prevent right/left vibration due to an external impact.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: March 6, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Joon Choi, Min-Young So, Hwa-Young Oh
  • Patent number: 8120215
    Abstract: A motor and a control unit therefor comprise: salient rotor poles and salient stator poles, which are arranged along circumferences of phases A, B and C with an even interval therebetween; magnetic paths for passing magnetic fluxes, the paths permitting the magnetic fluxes passing through the salient rotor and stator poles of each phase to return to the rotor side; and substantially looped windings arranged between the salient stator poles of individual phases and the magnetic paths for passing magnetic fluxes, wherein currents are supplied to the windings in synchronization with the rotational position of the rotor to thereby output torque. Since the structures of the stator, the rotor and the windings are simple, productivity is enhanced, whereby high quality, small size and low cost can be realized.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: February 21, 2012
    Assignee: Denso Corporation
    Inventor: Masayuki Nashiki
  • Patent number: 8120214
    Abstract: The present invention provides a linear vibrator comprising a weight having an auxiliary magnet which is provided in a lower end of the weight and generates magnetic force with respect to the bracket. Therefore, a magnetic attractive force between auxiliary magnet and the bracket prevents undesirable fine vibrations and prevents the vibration unit from coming into direct contact with the casing.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: February 21, 2012
    Assignee: Samsung Electro-Mechanics, Co., Ltd.
    Inventor: Young Jae Jeon
  • Publication number: 20120025635
    Abstract: Provided is a linear motor actuator capable of oscillating a mover without using mechanical resilience of an elastic body. A first permanent magnet 3a and a second permanent magnet 3b magnetized in an axis direction are disposed in a mover 4 in the direction of the axis. A first coil 1a and a second coil 1b are disposed in a stator 2 so as to surround the first permanent magnet 3a and the second permanent magnet 3b, respectively. Alternating currents having the same phase are applied to the first coil 1a and the second coil 1b such that the phase of thrust generated in the first coil 1a and that of thrust generated in the second coil 1b are shifted from each other. At this moment, a center-to-center pitch LC1 between the center of the first coil 1a and that of the second coil 1b in the axis direction differs from a pole-to-pole pitch LM1 of the mover.
    Type: Application
    Filed: April 5, 2010
    Publication date: February 2, 2012
    Applicant: THK CO., LTD.
    Inventor: Junichiro Iwaki
  • Patent number: 8093766
    Abstract: A cylindrical linear motor capable of solving the problem that a leak flux links an aluminum frame at both ends of an armature of a conventional cylindrical linear motor, which causes a viscous braking force as a motor brake force, is provided. The cylindrical linear motor armature 20 includes a plurality of cylindrical coils 20a arranged in the axial direction in a cylindrical yoke 20b formed by a magnetic material and frames 20d and 20e covering the outside of the cylindrical yoke 20b. Only in the axial direction region of the frame 20d where the cylindrical yoke 20b exists, the frame 20d is formed by an aluminum frame 20d, and the axial direction both end portions are formed by a resin cap 20e.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: January 10, 2012
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Toshiyuki Hoshi, Toru Takano, Masahiko Tanabe, Takahisa Yamada, Seigo Nagamatu
  • Patent number: 8093767
    Abstract: Various embodiments of the present invention comprise linear-resonant vibration modules that can be incorporated in a wide variety of appliances, devices, and systems to provide vibrational forces. The vibrational forces are produced by linear oscillation of a weight or member, in turn produced by rapidly alternating the polarity of one or more driving electromagnets. Feedback control is used to maintain the vibrational frequency of linear-resonant vibration module at or near the resonant frequency for the linear-resonant vibration module. Linear-resonant vibration modules can be designed to produce vibrational amplitude/frequency combinations throughout a large region of amplitude/frequency space.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: January 10, 2012
    Inventors: Brian Marc Pepin, Robin Elenga
  • Patent number: 8053941
    Abstract: An electric motor assembly includes a rotor rotatable about an axis and a stator spaced radially away from the rotor. An isolation housing, configured to permit magnetic flux to flow therethrough between the rotor and the stator, is disposed between the rotor and the stator and defines an internal rotor chamber, in which the rotor is located. The isolation housing fluidly isolates the internal rotor chamber from the stator. An encapsulating cover is provided that radially and axially surrounds the stator. The cover is formed of a resin material and bonds the stator to the isolation housing to prevent relative movement therebetween.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: November 8, 2011
    Assignee: Nidec Motor Corporation
    Inventors: Michael E. Moore, Terry J. Stuckey, Kawall Malhotra, Randall R. Floyd, John S. Bandas
  • Publication number: 20110210689
    Abstract: A linear motor for optical systems, for example, endoscopes, is described. The motor has a stator with a magnetic guiding member and a coil. The armature of the motor includes two permanent magnets which are of opposite polarity. A pole piece made of soft-magnetic material is provided between the permanent magnets. By applying current to the coil, the armature can be displaced from a rest position in the longitudinal direction.
    Type: Application
    Filed: February 25, 2011
    Publication date: September 1, 2011
    Inventor: Walter Vogel
  • Patent number: RE43465
    Abstract: A lens driving apparatus 1 of the present invention includes a substantially cylindrical yoke 3; a base 5 to which the yoke 3 is attached; a carrier 7 having a lens; a coil 10; and a magnet 13, wherein the carrier 7 is moved in a direction of an optical axis of a lens by electromagnetic force generated by passing current through the coil 10, the base 5 is substantially square-shaped as viewed from a plane, the yoke 3 is placed at an inner position of the base 5, the yoke 3 has an outer peripheral wall 3a and an annular inner peripheral wall 3b to be spaced to each other, each magnet is placed between the outer peripheral wall and the inner peripheral wall and at a position corresponding to a base corner portion of the base 5, and a space between the outer peripheral wall 3a and the inner peripheral wall 3b positioned at a base side portion 3e is made narrower than a space between the outer peripheral wall 3a and the inner peripheral wall 3b positioned at the base corner portion.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: June 12, 2012
    Assignees: Shicoh Co., Ltd., Shicoh Motor (Shanghai) Co., Ltd.
    Inventors: Manabu Shiraki, Naoki Sekiguchi
  • Patent number: RE43644
    Abstract: A lens driving apparatus 1 of the present invention includes a substantially cylindrical yoke 3; a base 5 to which the yoke 3 is attached; a carrier 7 having a lens; a coil 10; and a magnet 13, wherein the carrier 7 is moved in a direction of an optical axis of a lens by electromagnetic force generated by passing current through the coil 10, the base 5 is substantially square-shaped as viewed from a plane, the yoke 3 is placed at an inner position of the base 5, the yoke 3 has an outer peripheral wall 3a and an annular inner peripheral wall 3b to be spaced to each other, each magnet is placed between the outer peripheral wall and the inner peripheral wall and at a position corresponding to a base corner portion of the base 5, and a space between the outer peripheral wall 3a and the inner peripheral wall 3b positioned at a base side portion 3e is made narrower than a space between the outer peripheral wall 3a and the inner peripheral wall 3b positioned at the base corner portion.
    Type: Grant
    Filed: January 24, 2011
    Date of Patent: September 11, 2012
    Assignees: Shicoh Co., Ltd., Shicoh Motor (Shanghai) Co., Ltd.
    Inventors: Manabu Shiraki, Naoki Sekiguchi
  • Patent number: RE44117
    Abstract: A lens driving apparatus 1 of the present invention includes a substantially cylindrical yoke 3; a base 5 to which the yoke 3 is attached; a carrier 7 having a lens; a coil 10; and a magnet 13, wherein the carrier 7 is moved in a direction of an optical axis of a lens by electromagnetic force generated by passing current through the coil 10, the base 5 is substantially square-shaped as viewed from a plane, the yoke 3 is placed at an inner position of the base 5, the yoke 3 has an outer peripheral wall 3a and an annular inner peripheral wall 3b to be spaced to each other, each magnet is placed between the outer peripheral wall and the inner peripheral wall and at a position corresponding to a base corner portion of the base 5, and a space between the outer peripheral wall 3a and the inner peripheral wall 3b positioned at a base side portion 3e is made narrower than a space between the outer peripheral wall 3a and the inner peripheral wall 3b positioned at the base corner portion.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: April 2, 2013
    Assignees: Shicoh Co., Ltd., Shicoh Motor (Shanghai) Co., Ltd.
    Inventors: Manabu Shiraki, Naoki Sekiguchi