Permanent Magnets Patents (Class 335/302)
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Publication number: 20130241682Abstract: In one embodiment, a permanent magnet includes: a composition expressed by RpFeqMrCusCo100-p-q-r-s (R is a rare-earth element, M is at least one element selected from Zr, Ti, and Hf, 10.8?p?13.5 at %, 28?q?40 at %, 0.88?r?7.2 at %, and 3.5?s?13.5 at %); and a metallic structure including a cell phase having a Th2Zn17 crystal phase, and a cell wall phase. A Cu concentration in the cell wall phase is in a range from 30 at % to 70 at %.Type: ApplicationFiled: January 23, 2013Publication date: September 19, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yosuke Horiuchi, Shinya Sakurada, Tsuyoshi Kobayashi, Keiko Okamoto, Masaya Hagiwara
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Publication number: 20130241334Abstract: Permanent magnet (10), containing at least one metal component (13) from the group of the rare earth metals, comprising a first coating film (20), which forms a cathodic protection against corrosion for the permanent magnet (10), the first coating film (20) containing a metal (23) which is more electronegative in the electrochemical series than the metal component (13) of the permanent magnet (10), wherein a second coating film (30), which is embodied in an electrically insulating fashion, is applied on the first coating film (20).Type: ApplicationFiled: March 13, 2013Publication date: September 19, 2013Applicant: ROBERT BOSCH GMBHInventors: Maik Zernikow, Klaus Eppel
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PERMANENT MAGNET AND METHOD FOR MANUFACTURING THE SAME, AND MOTOR AND POWER GENERATOR USING THE SAME
Publication number: 20130241333Abstract: In an embodiment, a permanent magnet includes a composition represented by a composition formula: R(FepMqCur(Co1-sAs)1-p-q-r)z, where, R is at least one element selected from rare earth elements, M is at least one element selected from Ti, Zr, and Hf, A is at least one element selected from Ni, V, Cr, Mn, Al, Si, Ga, Nb, Ta, and W, 0.05?p?0.6, 0.005?q?0.1, 0.01?r?0.15, 0?s?0.2, and 4?z?9, and a two-phase structure of a Th2Zn17 crystal phase and a copper-rich phase. In a cross-section of the permanent magnet containing a crystal c axis of the Th2Zn17 crystal phase, an average distance between the copper-rich phases is 120 nm or less.Type: ApplicationFiled: September 14, 2012Publication date: September 19, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yosuke HORIUCHI, Shinya SAKURADA, Keiko OKAMOTO, Masaya HAGIWARA -
Publication number: 20130222094Abstract: Material powders made of a R—Fe—N compound that contains a light rare earth element as R or material powders made of a Fe—N compound are formed into a compact having a predetermined shape through compression forming. Then, the compact formed of the material powders is heated in an oxidative atmosphere to bond the material powders to each other by oxide films formed on the material powders.Type: ApplicationFiled: February 27, 2013Publication date: August 29, 2013Applicant: JTEKT CORPORATIONInventor: JTEKT Corporation
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Publication number: 20130222093Abstract: A hard magnetic material formed of material powders made of a R—Fe—N compound containing a light rare earth element as R, or material powders made of a Fe—N compound is used as material powders. There is formed a compact in which a density of the hard magnetic material powders differs between an outer face side portion and an inside portion of the compact such that a rate of progress of powder bonding due to microwave heating is higher in the inside portion of the compact than in the outer face side portion of the compact when an outer face of the compact is irradiated with microwaves. Then, the outer face of the compact is irradiated with the microwaves to cause the microwave heating, thereby bonding the hard magnetic material powders by oxide films which are formed on the hard magnetic material powders.Type: ApplicationFiled: February 20, 2013Publication date: August 29, 2013Applicant: JTEKT CORPORATIONInventor: JTEKT CORPORATION
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Patent number: 8514045Abstract: The embodiments of the invention generally relate to a novel magnet arrangement to further enhance the performance of the array. The new arrangement of magnets (for example, five configurations) can result in significantly much higher percentage gain in magnetic flux with respect to the largest magnetic flux of a component magnet, as compared to Halbach array configurations.Type: GrantFiled: September 7, 2012Date of Patent: August 20, 2013Assignee: Scidea Research, Inc.Inventor: Pat Sankar
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Patent number: 8514047Abstract: The embodiments of the invention generally relate to a novel magnet arrangement to further enhance the performance of the array. The new arrangement of magnets (for example, five configurations) can result in significantly much higher percentage gain in magnetic flux with respect to the largest magnetic flux of a component magnet, as compared to Halbach array configurations.Type: GrantFiled: November 12, 2012Date of Patent: August 20, 2013Assignee: Scidea Research, Inc.Inventor: Pat Sankar
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Patent number: 8514042Abstract: A magnetic attachment mechanism and method is described. The magnetic attachment mechanism can be used to releasably attach at least two objects together in a preferred configuration without fasteners and without external intervention. The magnetic attachment mechanism can be used to releasably attach an accessory device to an electronic device. The accessory device can be used to augment the functionality of usefulness of the electronic device.Type: GrantFiled: August 10, 2012Date of Patent: August 20, 2013Assignee: Apple Inc.Inventors: Andrew Lauder, Matthew D. Rohrbach, Daniel J. Coster, Christopher J. Stringer, Florence W. Ow, Jiang Ai, Jonathan P. Ive, Elvis M. Kibiti, John P. Ternus, Sean D. Lubner
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Publication number: 20130207759Abstract: Provided is a string-shaped magnet in which first magnetic parts 3 and second magnetic parts 4 are arranged alternately in series along a longitudinal direction of a flexible strand body 2 made of synthetic resin and containing a magnetic powder, each of the first magnetic parts 3 having a planar polar boundary surface 3a, each of the second magnetic parts 4 having a polar boundary surface 4a substantially in the same plane as the polar boundary surface 3a of the first magnetic part 3 and has magnetic polarities opposite to those of the first magnetic part 3.Type: ApplicationFiled: June 30, 2010Publication date: August 15, 2013Inventor: Naoki Nakamichi
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Publication number: 20130207760Abstract: A multipole magnet for deflecting a beam of charged particles, comprising: a plurality of ferromagnetic poles arranged in a pole plane; a plurality of permanent magnets each having a magnetisation direction, and each being arranged to supply magnetomotive force to the plurality of ferromagnetic poles to produce a magnetic field along the pole plane in a beamline space between the poles; and a plurality of ferromagnetic flux conducting members arranged to channel magnetic flux from at least one of the plurality of permanent magnets; wherein the multipole magnet comprises an even number of ferromagnetic poles, each pole being arranged to diametrically oppose another of the poles in the pole plane along a pole axis, wherein each of the plurality of permanent magnets is associated with at least one of the plurality of poles and the magnetisation direction of each permanent magnet isorientated in the pole plane at an angle of at least 45° relative to the pole axis of the associated pole.Type: ApplicationFiled: October 4, 2011Publication date: August 15, 2013Inventors: James Anthony Clarke, Benjamin John Arthur Shepherd, Neil Marks, Norbert Collomb
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Publication number: 20130207657Abstract: There are disclosed pole piece designs. In embodiments a pole piece comprises a rear face, the rear face comprising at least one channel. In embodiments the pole piece comprises at least one hole for accepting a cooperating shimming rod. There are also disclosed magnet arrays and magnetic resonance apparatuses comprising the pole pieces as well as uses of the pole pieces with magnet arrays according to embodiments.Type: ApplicationFiled: February 7, 2013Publication date: August 15, 2013Applicant: NANALYSIS CORPORATIONInventor: NANALYSIS CORPORATION
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Publication number: 20130194058Abstract: The invention disclosed here relates in general to a field of devices used to eliminate stress and strain to the body caused due to excessive bending and/or stooping. The Back Saver is a device used for the purpose of eliminating stress to the back and legs due to excessive bending and/or stooping. The purpose of this devise is targeted small objects that get trapped in vacuums such as paper clips, staples, safety pins, tacks, nails, etc. This device allows these objects to be picked up using this hand held tool, which consists of a magnetic attraction.Type: ApplicationFiled: April 4, 2013Publication date: August 1, 2013Inventor: VALERIA DENISE FRANKLIN
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Patent number: 8490955Abstract: An apparatus may comprise a permanent magnet unit, an end effector, and an electromagnetic clamping device. The end effector may be capable of performing workpiece operations. The electromagnetic clamping device may have an activated state and a deactivated state.Type: GrantFiled: November 3, 2008Date of Patent: July 23, 2013Assignee: The Boeing CompanyInventors: Branko Sarh, Harry Asada, Manas Chandran Menon
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Publication number: 20130181138Abstract: A cellular-type PD unit is proposed and a plurality of the cellular-type PD units is used in pairs in a multi-axis magnetic lens for focusing a plurality of charged beams. First type PD units or second type PD units (called as hybrid PD unit as well) can be applied to cellular-type PD units to flexibly construct sub-lenses. Furthermore, magnetic shielding plates with a plurality of through openings can be placed above and/or below the multi-axis magnetic lens to make magnetic flux leaking out of the multi-axis magnetic lens vanish away rapidly outside the magnetic shielding plates.Type: ApplicationFiled: January 15, 2013Publication date: July 18, 2013Applicant: HERMES-MICROVISION, INC.Inventor: HERMES-MICROVISION, INC.
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Patent number: 8487731Abstract: Provided is a magnetic element capable of enhancing fixing strength of a base with respect to a core even if the base is fixed to the core by insert molding. A magnetic element (1) includes a core (2) made of a magnetic material, and resin bases (3 and 4) formed by insert molding so as to be fixed to end portions of the core (2), in which the core (2) is provided with a recess (2b) recessed from an end face (2a). In the magnetic element (1), it is possible to enhance the fixing strength of the bases (3 and 4) with respect to the core (2).Type: GrantFiled: June 19, 2008Date of Patent: July 16, 2013Assignee: Sumida CorporationInventor: Yasunori Morimoto
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Publication number: 20130176091Abstract: A method for plating magnets with metal is disclosed. In one embodiment, the metal is aluminum and the aluminum plating provides a number of aesthetic and structural advantages, over brittle magnetic materials, which are only plated with a thin, anti-corrosive metallic layer. More specifically, methods for creating multi-pole bar magnets and structural elements primarily with aluminum coated magnetic material are disclosed.Type: ApplicationFiled: September 26, 2012Publication date: July 11, 2013Applicant: Apple Inc.Inventor: Apple Inc
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Patent number: 8480815Abstract: A method of making a permanent magnet is described. In one embodiment, the method includes providing a first alloy powder having a desired composition, the alloy powder containing neodymium, iron, and boron; coating the first alloy powder with dysprosium, dysprosium alloy, terbium, or terbium alloy so that the first alloy powder has a surface concentration of dysprosium, terbium, or both in excess of a bulk concentration of dysprosium, terbium, or both; and forming the permanent magnet from the coated alloy powder using a powder metallurgy process, the permanent magnet having a non-uniform distribution of dysprosium, terbium, or both therein. Permanent magnets are also described.Type: GrantFiled: January 14, 2011Date of Patent: July 9, 2013Assignee: GM Global Technology Operations LLCInventor: Yucong Wang
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Publication number: 20130169394Abstract: A method for producing an NdFeB sintered includes forming a layer containing Dy and/or Tb on the surface of an NdFeB sintered magnet base material and then performing a grain boundary diffusion process for diffusing Dy and/or Tb from the aforementioned layer through the crystal grain boundaries of the magnet base material into the magnet base material by heating the magnet base material to a temperature equal to or lower than the sintering temperature thereof. In this method: a) the content of a rare earth in a metallic state in the magnet base material is equal to or higher than 12.7 at %; b) the aforementioned layer is a powder layer formed by depositing a powder; and c) the powder layer contains Dy and/or Tb in a metallic state by an amount equal to or higher than 50 mass %.Type: ApplicationFiled: February 27, 2013Publication date: July 4, 2013Applicant: INTERMETALLICS CO., LTD.Inventors: Masato SAGAWA, Naoki Fujimoto
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Publication number: 20130169395Abstract: The structure includes cylindrical columnar and tubular bonded magnets. The columnar magnet has at least one pair of N and S poles that are alternately produced in the longitudinal direction. The tubular magnet surrounds the columnar magnet, and has at least one pair of N and S poles that are alternately produced in the longitudinal direction. Poles of the columnar and tubular magnets that are opposed to each other in the direction perpendicular to the axis of the columnar magnet as the propulsion force direction are of opposite magnetic polarity so that magnetic fields are produced in the direction perpendicular to the propulsion force direction. The surface magnetic flux density profile balance can be smoothed by adjusting higher and lower parts of the profiles of the columnar and tubular magnets.Type: ApplicationFiled: September 27, 2011Publication date: July 4, 2013Applicants: NICHIA CORPORATION, K TECHNOLOGY CORPORATION, I&P CO., Ltd.Inventors: Kohei Ihara, Syuji Matsumura, Keiki Nishino
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Patent number: 8471425Abstract: Various embodiments relate generally to electrodynamic machines and the like, and more particularly, to rotor assemblies and rotor-stator structures for electrodynamic machines, including, but not limited to, outer rotor assemblies and/or inner rotor assemblies with a corresponding stator assembly. In some embodiments a rotor assembly can include magnetically permeable structures having confronting surfaces oriented at an angle to the axis of rotation. A group of magnetic structures can be interleaved with the magnetically permeable structures. The magnetically permeable structures can also include non-confronting surfaces adjacent to which boost magnets are disposed to enhance flux in a flux path passing through magnetic structures that are interleaved with magnetically permeable structures. Further, the rotor assemblies can include a flux conductor shield disposed adjacent to the boost magnets, the flux conductor shield configured to provide return flux paths.Type: GrantFiled: March 9, 2011Date of Patent: June 25, 2013Assignee: NovaTorque, Inc.Inventors: John P. Petro, Ken G. Wasson, Donald Burch, Jeremy Mayer, Michael Regalbuto
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Publication number: 20130154778Abstract: The invention discloses a low-neodymium, non-heavy-rare-earth and high-performance magnet and its preparing method, and belongs to technical field of rare earth permanent magnetic material. The magnet has a chemical formula of [(Nd, Pr)100-x(Ce100-yLay)x]aFe100-a-b-cBbTMc, wherein x, y, a, b and c represent mass percents of corresponding elements respectively, 0?x?40%, 0?y?15%, 29?a?30%, 0.5?b?5%, 0.5?c?5%; and TM is one or more selected from Ga, Co, Cu, Nb and Al elements. A series of grades of magnets can be prepared with rapidly solidified strips of only three components. Component proportioning of magnet can also be directly performed by using mixed rare earth, so that the cost increased by further separation and purification of the rare earth is reduced. During the preparation of magnetic powder with a jet mill, an antioxidant lubricant which is composed of alcohol, gasoline and basic synthetic oil is added.Type: ApplicationFiled: December 12, 2012Publication date: June 20, 2013Applicant: Central Iron and Steel Research InstituteInventor: Central Iron and Steel Research Institute
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Publication number: 20130153782Abstract: The present invention provides two ways to form a special permeability-discontinuity unit inside every sub-lens of a multi-axis magnetic lens, which either has a simpler configuration or has more flexibility in manufacturing such as material selection and mechanical structure. Accordingly several types of multi-axis magnetic lens are proposed for various applications. One type is for general application such as a multi-axis magnetic condenser lens or a multi-axis magnetic transfer lens, another type is a multi-axis magnetic non-immersion objective which can require a lower magnetomotive force, and one more type is a multi-axis magnetic immersion objective lens which can generate smaller aberrations. Due to using permeability-discontinuity units, every multi-axis magnetic lens in this invention can also be electrically excited to function as a multi-axis electromagnetic compound lens so as to further reduce aberrations thereof and/or realize electron beam retarding for low-voltage irradiation on specimen.Type: ApplicationFiled: May 4, 2012Publication date: June 20, 2013Applicant: Hermes Microvision, Inc.Inventors: Weiming Ren, Zhongwei Chen
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Publication number: 20130145847Abstract: A speed sensor target includes a target body, the target body defining a central cavity disposed to receive a shaft of a motor, the target body includes a cylindrical outer surface having a plurality of asymmetrically spaced grooves arranged thereon, and the target body is formed of a magnetic material.Type: ApplicationFiled: December 9, 2011Publication date: June 13, 2013Applicant: Hamilton Sundstrand Space Systems International, Inc.Inventors: Christopher Curtis Martin, Mark E. Gilbert
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Publication number: 20130141195Abstract: There are provided a rare-earth permanent magnet and a manufacturing method thereof capable of preventing deterioration of magnet properties. In the method, magnet material is milled into magnet powder. Next, a mixture is prepared by mixing the magnet powder and a binder made of a fatty acid methyl ester and/or one of or a blend of polymers and copolymers each composed of monomers satisfying a given condition. Next, the mixture is formed into a sheet-like shape to obtain a green sheet. After that, the green sheet is held for a predetermined length of time at binder decomposition temperature in a non-oxidizing atmosphere so as to remove the binder by causing depolymerization reaction or the like to the binder, which turns into monomer. The green sheet from which the binder has been removed is sintered by raising temperature up to sintering temperature. Thereby a permanent magnet 1 is obtained.Type: ApplicationFiled: March 15, 2012Publication date: June 6, 2013Applicant: NITTO DENKO CORPORATIONInventors: Keisuke Taihaku, Katsuya Kume, Izumi Ozeki, Toshiaki Okuno, Tomohiro Omure, Takashi Ozaki
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Publication number: 20130141197Abstract: There are provided a rare-earth permanent magnet and a manufacturing method of the rare-earth permanent magnet capable of preventing deterioration of magnet properties. In the method, magnet material is milled into magnet powder, and the magnet powder is mixed with a binder made of a hydrocarbon to prepare slurry 12, and one or more kinds of organic solvents selected from a group of organic compounds consisting of hydrocarbons. Next, the slurry 12 is formed into a sheet-like shape to obtain a green sheet 13. After that, the green sheet 13 is held for a predetermined length of time at binder decomposition temperature in a non-oxidizing atmosphere so as to cause depolymerization reaction or the like to the binder, which turns into monomer and is removed. The green sheet 13 with the binder removed is sintered by raising temperature up to sintering temperature. Thereby a permanent magnet 1 is obtained.Type: ApplicationFiled: March 15, 2012Publication date: June 6, 2013Applicant: NITTO DENKO CORPORATIONInventors: Takashi Ozaki, Katsuya Kume, Toshiaki Okuno, Izumi Ozeki, Tomohiro Omure, Keisuke Taihaku
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Publication number: 20130141194Abstract: There are provided a rare-earth permanent magnet and a manufacturing method thereof capable of simplifying manufacturing process and improving productivity through advanced ability to produce net shapes. In the method, magnet material is milled into magnet powder, and the magnet powder and a binder are mixed to prepare a mixture. Next, the prepared mixture is formed into a green sheet. Thereafter, the green sheet is held for predetermined time at binder decomposition temperature in non-oxidizing atmosphere, whereby depolymerization reaction or the like changes the binder into monomer and thus removes the binder. The green sheet with the binder removed therefrom undergoes pressure sintering such as SPS method so as to obtain a rare-earth permanent magnet 1.Type: ApplicationFiled: March 15, 2012Publication date: June 6, 2013Applicant: NITTO DENKO CORPORATIONInventors: Izumi Ozeki, Katsuya Kume, Toshiaki Okuno, Tomohiro Omure, Takashi Ozaki, Keisuke Taihaku
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Publication number: 20130141196Abstract: There are provided a rare-earth permanent magnet and a manufacturing method thereof capable of achieving improvement of magnetic properties by optimizing magnetic field orientation. In the method, magnet material is milled into magnet powder. Next, the magnet powder and a binder are mixed to obtain a mixture. Next, the thus prepared mixture is formed into long-sheet-like shape so as to obtain a green sheet 13. Before the thus formed green sheet 13 dries, magnetic field is applied in an in-plane and transverse direction or an in-plane and machine direction of the green sheet for magnetic field orientation. Thereby, a permanent magnet 1 is obtained.Type: ApplicationFiled: March 15, 2012Publication date: June 6, 2013Applicant: NITTO DENKO CORPORATIONInventors: Izumi Ozeki, Katsuya Kume, Toshiaki Okuno, Takashi Ozaki, Tomohiro Omure, Keisuke Taihaku
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Publication number: 20130135068Abstract: A magnetic assembly contains a magnetic member including two end portions with two different magnetic poles respectively and a groove fixed thereon in an axial direction, an exterior of the magnetic member and an exterior of the groove having magnetic fields surrounding therearound in different directions individually; a magnet guiding member with a magnetic permeability including a plate to contact with one end of the magnetic member, and the plate including a post extending outward therefrom to be fitted into the groove of the magnet guiding member.Type: ApplicationFiled: November 30, 2011Publication date: May 30, 2013Inventor: Leo Shih
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Publication number: 20130135069Abstract: A permanent magnet has a grain structure that includes a main phase and a grain boundary phase that is primarily composed of a first metal. A second metal that enhances the coercivity of the permanent magnet and a third metal that has a lower standard free energy of oxide formation than the first metal and the second metal are diffused in the permanent magnet, and the third metal is present in the form of an oxide in the grain boundary phase.Type: ApplicationFiled: July 13, 2011Publication date: May 30, 2013Inventors: Noritaka Miyamoto, Shinya Omura
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Publication number: 20130135070Abstract: There are provided a rare-earth permanent magnet and a manufacturing method thereof capable of boosting productivity by improving thickness accuracy of a green sheet. In the method, magnet material is milled into magnet powder, and the magnet powder and a binder are mixed to obtain a mixture including 1 to 40 wt % of the binder therein. Next, by high precision coating of a substrate with the mixture, a green sheet is obtained at thickness precision within a margin of error of plus or minus 5% with reference to a designed value. Thereafter, the green sheet is held for predetermined time at binder decomposition temperature in non-oxidizing atmosphere, whereby depolymerization reaction or the like changes the binder into monomer and thus removes the binder. The green sheet with the binder removed therefrom undergoes pressure sintering such as SPS method so as to obtain a permanent magnet 1.Type: ApplicationFiled: March 15, 2012Publication date: May 30, 2013Applicant: NITTO DENKO CORPORATIONInventors: Izumi Ozeki, Katsuya Kume, Toshiaki Okuno, Takashi Ozaki, Tomohiro Omure, Keisuke Taihaku
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Publication number: 20130113586Abstract: An article for use in various industries including for manufacturing toys, promotional articles, and decorative articles using plastic includes a body (1), a built-in magnet (3) and a receptacle (2) with side arms (21) embedded in the body (1). The receptacle (2) has a base (23), an opening (25) for introducing the magnet (3), and a closure lid (4) for closing the opening (25).Type: ApplicationFiled: November 5, 2012Publication date: May 9, 2013Applicant: Magic Box Int. Toys, S.L.U.Inventor: Magic Box Int. Toys, S.L.U.
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Patent number: 8430247Abstract: Method for handling microparticles in such a manner, that at least two treatment steps are performed for microparticles in the same vessel without moving the particles to another vessel. There are organs in the device for changing the solution without having to move the microparticles to another vessel.Type: GrantFiled: November 18, 2011Date of Patent: April 30, 2013Assignee: BioControl Systems, Inc.Inventors: Matti Korpela, Kenneth Rundt
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Publication number: 20130093552Abstract: A neodymium-iron-boron (NdFeB) magnet having gradient coercive force and its preparation method are disclosed. The NdFeB magnet includes at least two NdFeB material layers having different coercive force, including an exterior layer having high coercive force and at least a medial layer having low coercive force. The exterior layer is connected to the medial layer via a sintered layer along an orientation direction. The NdFeB magnet has high magnetic properties and high resistance to magnetism loss.Type: ApplicationFiled: December 24, 2010Publication date: April 18, 2013Inventors: Qingkai Wang, Yongjiang Yu, Ning Guo
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Publication number: 20130093551Abstract: An R—Fe—B based magnet having gradient electric resistance and a method for producing the same are provided. The magnet includes an exterior layer (G) and a main body layer (H). The exterior layer (G) is connected with the main body layer (H) via a sintered layer (I). The oxygen content in the exterior layer (G) is higher than the oxygen content in the main body layer (H), so the electrical resistivity of the exterior layer (G) is not lower than the electrical resistivity of the main body layer (H). The R—Fe—B based magnet having gradient electric resistance is capable of maintaining high resistance and excellent magnetic performance simultaneously.Type: ApplicationFiled: December 24, 2010Publication date: April 18, 2013Inventors: Buzhuang Peng, Juntao Zhao, Guangjun Li
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Publication number: 20130087248Abstract: A method for producing a sintered R-T-B based magnet includes the steps of: providing a sintered R-T-B based magnet body 1; providing an RH diffusion source including a heavy rare-earth element RH (which is at least one of Dy and Tb) and 30 mass % to 80 mass % of Fe; loading the sintered R-T-B based magnet body 1 and the RH diffusion source 2 into a processing chamber 3 so that the magnet body 1 and the diffusion source 2 are movable relative to each other and are readily brought close to, or in contact with, each other; and performing an RH diffusion process in which the sintered magnet body 1 and the RH diffusion source 2 are heated to a processing temperature of more than 850° C. through 1000° C. while being moved either continuously or discontinuously in the processing chamber.Type: ApplicationFiled: July 12, 2011Publication date: April 11, 2013Inventor: Futoshi Kuniyoshi
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Patent number: 8414776Abstract: A sucker-rod pumping system includes diametrically charged rare earth magnets having significant monopolar character mounted on the rod string and, optionally, within a magnet barrel below the pump barrel. The magnets are jacketed to preclude contact with crude petroleum. The magnets subject the petroleum to a significant magnetic flux to substantially preclude precipitation of paraffins and asphaltenes with a minimum of retrofit to existing equipment and without substantially altering the operation of the rod string.Type: GrantFiled: October 8, 2008Date of Patent: April 9, 2013Assignee: RFG Technology Partners LLCInventor: John T. Hale
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Publication number: 20130082559Abstract: In one embodiment, a permanent magnet includes a composition represented by R(FepMqCur(Co1-p-q-r)z, (R: rare earth element, M: at least one element selected from Ti, Zr and Hf, 0.3<p?0.45, 0.01?q?0.05, 0.01?r?0.1, 5.6?z?9), and a metallic structure including a Th2Zn17 crystal phase, a grain boundary phase and a platelet phase. A spatial distribution of Cu concentration in the grain boundary phase is set to 5 or less in standard deviation.Type: ApplicationFiled: March 19, 2012Publication date: April 4, 2013Applicant: Kabushiki Kaisha ToshibaInventors: Masaya Hagiwara, Shinya SAKURADA, Yosuke HORIUCHI, Tsuyoshi KOBAYASHI, Keiko OKAMOTO
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Patent number: 8410880Abstract: A system for improved magnetization of flexible magnetic sheet material, such as magnetic rubber. More particularly, this invention relates to providing a system for magnetization of pre-printed flexible magnetic sheet material.Type: GrantFiled: May 4, 2010Date of Patent: April 2, 2013Assignee: Magnum Magnetics CorporationInventors: Bernard F. Ball, Sr., Douglas William Rummer, Joseph B. Stout
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Patent number: 8410881Abstract: A system for improved magnetization of flexible magnetic sheet material, such as magnetic rubber. More particularly, this invention relates to providing a system for magnetization of printed or printable flexible magnetic sheet material.Type: GrantFiled: March 29, 2012Date of Patent: April 2, 2013Assignee: Magnum Magnetics CorporationInventor: Bernard F. Ball, Sr.
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Publication number: 20130076184Abstract: In one embodiment, a permanent magnet includes a composition represented by RpFeqMrCusCo100-p-q-r-s (R: rare earth element, M: at least one element selected from Zr, Ti and Hf, 10?p?13.5 atomic %, 28?q?40 atomic %, 0.88?r?7.2 atomic %, 4?s?13.5 atomic %), and a metallic structure in which a composition region having an Fe concentration of 28 mol % or more is a main phase. A Cu concentration in the main phase is 5 mol % or more.Type: ApplicationFiled: March 19, 2012Publication date: March 28, 2013Applicant: Kabushiki Kaisha ToshibaInventors: Yosuke Horiuchi, Shinya Sakurada, Tsuyoshi Kobayashi, Keiko Okamoto, Masaya Hagiwara
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Patent number: 8405479Abstract: A magnet structure is provided that includes a first layer of magnets including a first pole magnet and a plurality of first magnets that are positioned about the first pole magnet. The plurality of first magnets are oriented to have respective magnetic fields directed inward relative to the first pole magnet. The magnet structure may also include a second layer of magnets including a second pole magnet and a plurality of second magnets positioned about the second pole magnet and oriented such that the plurality of second magnets have respective magnetic fields directed outward relative to the second pole magnet. The magnet structure may also include a planar magnet positioned between the first and second layers of magnets and oriented such that the planar magnet repels each of the first and second layers of magnets. A magnet assembly and an associated method are also provided.Type: GrantFiled: December 22, 2009Date of Patent: March 26, 2013Assignee: The Boeing CompanyInventor: Mark Allen Cleveland
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Patent number: 8405477Abstract: This invention relates to methods and devices for propulsion through a fluid, in particular at low Reynolds number. We describe a method of propelling one of a magnetic device and a fluid relative to the other, the magnetic device comprising a pair of magnetic moments linked by an elastic coupling element, one of said moments having a greater resistance to a change in orientation due to an external applied magnetic field than the other, the method comprising applying an elliptical or ellipsoidal rotating magnetic field to the device to cause a change in mutual attraction or repulsion between said magnetic moments to thereby change a physical configuration of said device, propelling said device relative to said fluid.Type: GrantFiled: February 22, 2008Date of Patent: March 26, 2013Assignee: University of ExeterInventors: Feodor Yurievitch Ogrin, Peter Georgiev Petrov, Charles Peter Winlove
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Publication number: 20130069746Abstract: Disclosed is a sintered magnet which is a rare-earth magnet using a less amount of a rare-earth element but having a higher maximum energy product and a higher coercivity. The sintered magnet includes a NdFeB crystal; and an FeCo crystal adjacent to the NdFeB crystal through the medium of a grain boundary. The FeCo crystal includes a core and a periphery and has a cobalt concentration decreasing from the core to the periphery. The FeCo crystal has a difference in cobalt concentration of 2 atomic percent or more between the core and the periphery. In the NdFeB crystal, cobalt and a heavy rare-earth element are unevenly distributed and enriched in the vicinity of the grain boundary.Type: ApplicationFiled: August 13, 2012Publication date: March 21, 2013Applicant: Hitachi, Ltd.Inventors: Matahiro KOMURO, Yuichi Satsu, Isao Kitagawa, Akira Sugawara
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Publication number: 20130069747Abstract: A production method for a case-integrated bonded magnet includes: filling a tubular cavity with a magnet raw material that includes a rare-earth magnet powder and a thermosetting resin binder; heating the magnet raw material to cause the thermosetting resin softened or melted while compressively molding the magnet raw material to obtain a tubular compact; discharging the tubular compact from the tubular cavity while press-fitting the tubular compact into a metal tubular case having an inner peripheral surface coaxial with the tubular cavity; and heat-curing the tubular compact with the tubular case to cure the thermosetting resin. The tubular compact press-fitted into the tubular case is thermally cured thereby causing the tubular compact to transform to a tubular bonded magnet, which expands unexpectedly due to heat.Type: ApplicationFiled: April 5, 2011Publication date: March 21, 2013Applicant: Aichi Steel CorporationInventors: Yoshinobu Honkura, Hironari Mitarai, Hiroshi Matsuoka, Masayuki Kato, Ikuzou Okumura
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Patent number: 8395465Abstract: A magnetic attachment mechanism and method is described. The magnetic attachment mechanism can be used to releasably attach at least two objects together in a preferred configuration without fasteners and without external intervention. The magnetic attachment mechanism can be used to releasably attach an accessory device to an electronic device. The accessory device can be used to augment the functionality of usefulness of the electronic device.Type: GrantFiled: December 17, 2010Date of Patent: March 12, 2013Assignee: Apple Inc.Inventors: Andrew Lauder, Matthew D. Rohrbach, Daniel J. Coster, Christopher J. Stringer, Florence W. Ow, Jiang Ai, Jonathan P. Ive, Elvis M. Kibiti, John P. Ternus, Sean D. Lubner
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Patent number: 8395468Abstract: A magnetic field generation system includes first (28a) and second (28b) magnetic flux concentrators spaced apart to form a sample volume (30). A first set of auxiliary permanent magnets (10a, 10b) can be symmetrically oriented about and in contact with a portion of the first magnetic flux concentrator (28a). Similarly, a second set of auxiliary permanent magnets (10c, 10d) can be symmetrically oriented about and in contact with a portion of the second magnetic flux concentrator (28b). The first(10a, 10b) and second (10c, 10d) sets of auxiliary magnets can be magnetically associated via the first (28a) and second (28b) magnetic flux concentrators. Magnetically soft shunts (38) can be movably oriented to allow variation of the magnetic field strength across the sample volume by disrupting the field flux across the magnetic flux concentrators.Type: GrantFiled: January 4, 2007Date of Patent: March 12, 2013Assignee: University of Utah Research FoundationInventors: James C. Stephenson, Bruce K. Gale, Cynthia Furse
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Patent number: 8395467Abstract: A magnetic attachment system is described. The magnetic attachment system has a first plurality of magnetic sources arranged in accordance with a first pattern and a second polarity of magnetic sources arranged in accordance with a second pattern. The first pattern and second pattern are self-complementary, where the magnetic attachment system will correlate and align with a duplicate magnetic attachment system.Type: GrantFiled: May 12, 2012Date of Patent: March 12, 2013Assignee: Correlated Magnetics Research, LLCInventors: Larry W. Fullerton, Mark D. Roberts, James L. Richards
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Publication number: 20130057373Abstract: A molding system with inserts placed on the die and/or the punch of the mold, which allows one to obtain molded products with co-molded ferromagnetic inserts on the surfaces thereof.Type: ApplicationFiled: May 10, 2011Publication date: March 7, 2013Inventors: Mauro Masiero, Antonio Sgaravatti
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Patent number: 8390411Abstract: A magnetic attachment mechanism and method is described. The magnetic attachment mechanism can be used to releasably attach at least two objects together in a preferred configuration without fasteners and without external intervention. The magnetic attachment mechanism can be used to releasably attach an accessory device to an electronic device. The accessory device can be used to augment the functionality of usefulness of the electronic device.Type: GrantFiled: December 17, 2010Date of Patent: March 5, 2013Assignee: Apple Inc.Inventors: Andrew Lauder, Matthew D. Rohrbach, Daniel J. Coster, Christopher J. Stringer, Florence W. Ow, Jiang Ai, Jonathan P. Ive, Elvis M. Kibiti, John P. Ternus, Sean D. Lubner
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Patent number: 8390413Abstract: A magnetic attachment mechanism and method is described. The magnetic attachment mechanism can be used to releasably attach at least two objects together in a preferred configuration without fasteners and without external intervention. The magnetic attachment mechanism can be used to releasably attach an accessory device to an electronic device. The accessory device can be used to augment the functionality of usefulness of the electronic device.Type: GrantFiled: August 1, 2012Date of Patent: March 5, 2013Assignee: Apple Inc.Inventors: Andrew Lauder, Matthew D. Rohrbach, Daniel J. Coster, Christopher J. Stringer, Florence W. Ow, Jiang Al, Jonathan P. Ive, Elvis M. Kibiti, John P. Ternus, Sean D. Lubner