Working Patents (Class 148/120)
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Patent number: 12076777Abstract: In a device, in particular machine, for producing Wiegand wire from a wire, in particular pulse wire, and a method for operating a device, the device having a first clamping chuck, a second clamping chuck, and a third clamping chuck, the wire being fed through each of the three clamping chucks, in particular so that the wire is able to be connected in a releasable and torsionally fixed manner to the three clamping chucks, in particular able to be connected to the three clamping chucks in a releasable, torsionally fixed and nonpositive manner. The clamping chucks are set apart from one another in the wire direction, and the second clamping chuck is situated between the first and the third clamping chuck in the wire direction.Type: GrantFiled: March 1, 2018Date of Patent: September 3, 2024Assignee: SEW-EURODRIVE GMBH & CO. KGInventors: Olaf Simon, Dennis Rädle, Julian Hoffmann, Daniel Simon Fuchs
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Patent number: 11775206Abstract: A hardware unit for manipulating data stored in a memory comprises an internal buffer, a memory reading block, configured to read the data from the memory and write the data to the internal buffer. a memory writing block, configured to read the data from the internal buffer and write the data to the memory. The hardware unit optionally also comprises a control channel between the memory reading block and the memory writing block, wherein the memory reading block and the memory writing block are configured to communicate via the control channel to maintain synchronisation between them when writing the data to the internal buffer and reading the data from the internal buffer, respectively. The hardware unit may be configured to apply one or more transformations to multidimensional data in the memory. The hardware unit may be configured to traverse the multidimensional array using a plurality of nested loops.Type: GrantFiled: June 2, 2021Date of Patent: October 3, 2023Assignee: Imagination Technologies LimitedInventors: Alan Vines, Stephen Spain, Fernando Escobar
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Patent number: 11742201Abstract: A method includes etching a semiconductor substrate to form a trench, and depositing a dielectric layer using an Atomic Layer Deposition (ALD) cycle. The dielectric layer extends into the trench. The ALD cycle includes pulsing Hexachlorodisilane (HCD) to the semiconductor substrate, purging the HCD, pulsing triethylamine to the semiconductor substrate, and purging the triethylamine. An anneal process is then performed on the dielectric layer.Type: GrantFiled: December 23, 2021Date of Patent: August 29, 2023Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTDInventors: Wan-Yi Kao, Chung-Chi Ko
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Patent number: 11441041Abstract: The present invention provides a magnetic multilayer pigment flake and a magnetic coating composition that are relatively safe for human health and the environment. The pigment flake includes one or more magnetic layers of a magnetic alloy and one or more dielectric layers of a dielectric material. The magnetic alloy is an iron-chromium alloy or an iron-chromium-aluminum alloy, having a substantially nickel-free composition. The coating composition includes a plurality of the pigment flakes disposed in a binder medium.Type: GrantFiled: October 15, 2019Date of Patent: September 13, 2022Assignee: VIAVI SOLUTIONS INC.Inventors: Vladimir P. Raksha, Paul T. Kohlmann, Cornelis Jan Delst, Paul G. Coombs
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Patent number: 11373023Abstract: A parametric equivalent magnetic network modeling method for multi-objective optimization of permanent magnet motor is provided. Firstly, the disordered region and the regular region of the magnetic flux lines in the motor are divided, and the dynamic mesh model of the disordered region and the magnetic circuit model of the ordered region is constructed. Then, the dynamic mesh model and the magnetic circuit model are connected, and the parametric equivalent magnetic network model of the motor is established. The nonlinear matrix is used to solve the equations, and the magnetic potential of each node is solved to obtain the torque characteristics of the motor. Then, the variable sensitivity analyses of the average torque and torque ripple are carried out by using the parametric equivalent magnetic network model, and the response surface models of the average torque and torque ripple are established by selecting the high sensitivity variables.Type: GrantFiled: June 24, 2020Date of Patent: June 28, 2022Assignee: JIANGSU UNIVERSITYInventors: Wenxiang Zhao, Donghui Cao, Jinghua Ji
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Patent number: 11332801Abstract: To provide a grain-oriented electrical steel sheet that has better magnetic property than conventional ones without requiring high-temperature slab heating, in the case of not performing intermediate annealing, the hot rolled steel sheet obtained by a predetermined step is subjected to hot band annealing, and, in a heating process in the hot band annealing, heating is performed at a heating rate of 10° C./s or less for 10 sec or more and 120 sec or less in a temperature range of 700° C. or more and 950° C. or less, and in the case of performing the intermediate annealing, in a heating process in final intermediate annealing, heating is performed at a heating rate of 10° C./s or less for 10 sec or more and 120 sec or less in a temperature range of 700° C. or more and 950° C. or less.Type: GrantFiled: March 9, 2017Date of Patent: May 17, 2022Assignee: JFE STEEL CORPORATIONInventors: Yuiko Ehashi, Masanori Takenaka, Yasuyuki Hayakawa, Minoru Takashima, Takeshi Imamura
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Patent number: 11326221Abstract: According to an exemplary embodiment of the present invention, a manufacturing method of a grain-oriented electrical steel sheet, includes: preparing a slab; heating the slab; forming a hot-rolled sheet by hot-rolling the slab; performing hot-rolled sheet annealing on the hot-rolled sheet; forming a cold-rolled sheet by cold-rolling the hot-rolled sheet that has been completely subjected to the hot-rolled sheet annealing; performing first recrystallization annealing on the cold-rolled sheet; and performing second recrystallization annealing on the cold-rolled sheet that has been completely subjected to the first recrystallization annealing, wherein the hot-rolled sheet undergoes a first heating step, a second heating step, and a soaking step, and a temperature rise rate t1 of the first heating step and a temperature rise rate t2 of the second heating step satisfy Formula 1.Type: GrantFiled: December 13, 2017Date of Patent: May 10, 2022Assignee: POSCOInventors: Dae Hyun Song, Seung Il Kim, June Soo Park, Il Nam Yang
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Patent number: 11222738Abstract: The present invention provides a method for manufacturing a rare-earth magnet, the method comprising the steps of preparing a rare-earth magnet raw material powder including R, Fe and B as composition components (R is one or more elements selected from the rare earth elements including Y and Sc); packing the raw material powder into a molding die, and compacting and molding the raw material powder while applying a magnetic field, wherein, in the compacting and molding step, compacting is performed biaxially, in the directions of X and Y axes, when the magnetic field is applied in the direction of Z axis.Type: GrantFiled: June 10, 2016Date of Patent: January 11, 2022Assignee: STAR GROUP IND. CO., LTDInventors: Dong Hwan Kim, Koon Seung Kong
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Patent number: 11155907Abstract: Systems and methods in accordance with embodiments of the invention advantageously shape sheet materials that include metallic glass-based materials. In one embodiment, a method of shaping a sheet of material including a metallic glass-based material includes: heating a metallic glass-based material within a first region within a sheet of material to a temperature greater than the glass transition temperature of the metallic glass-based material; where the sheet of material has a thickness of between 0.Type: GrantFiled: December 28, 2017Date of Patent: October 26, 2021Assignee: California Institute of TechnologyInventors: Douglas C. Hofmann, Scott N. Roberts
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Patent number: 10957481Abstract: A method for manufacturing a strip in a soft magnetic alloy capable of being cut out mechanically, the chemical composition of which comprises by weight: 18%?Co?55% 0%?V+W?3% 0%?Cr?3% 0%?Si?3% 0%?Nb?0.5% 0%?B?0.05% 0%?C?0.1% 0%?Zr+Ta?0.5% 0%?Ni?5% 0%?Mn?2% The remainder being iron and impurities resulting from the elaboration, according to which a strip obtained by hot rolling is cold-rolled in order to obtain a cold-rolled strip with a thickness of less than 0.6 mm. After cold rolling, a continuous annealing treatment is carried out by passing into a continuous oven, at a temperature comprised between the order/disorder transition temperature of the alloy and the onset temperature of ferritic/austenitic transformation of the alloy, followed by rapid cooling down to a temperature below 200° C. Strip obtained.Type: GrantFiled: December 17, 2012Date of Patent: March 23, 2021Assignee: APERAMInventors: Thierry Waeckerle, Remy Batonnet
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Patent number: 10589355Abstract: An improvement of coercive force of Nd—Fe—B base sintered magnet can be realized while suppressing a decrease in remanent magnetic flux density to the minimum using a method for modifying grain boundary which comprises heat-treating an Nd—Fe—B base magnet with a specific alloy disposed on its surface, the alloy having the following Formula 1: RxAyBz??(1) wherein R represents at least one rare earth element including Sc and Y, A represents Ca or Li, B represents an unavoidable impurity, and 2?x?99, 1?y<x, and 0?z<y.Type: GrantFiled: October 12, 2016Date of Patent: March 17, 2020Assignees: Nissan Motor Co., Ltd., Osaka UniversityInventors: Masaru Uenohara, Takashi Furuya, Koichi Nakazawa, Shinichirou Fujikawa, Seiji Kawai, Kenichi Machida, Genya Yamato
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Patent number: 10478877Abstract: Provided are a metal wire rod drawing die that has a longer life than conventional dies and that can prevent damage to a metal wire rod surface and a method for manufacturing the die. In a metal wire rod drawing die (1), a die hole (2) for inserting a metal wire rod is formed. Where Ra1 represents a surface roughness of an inner surface of the die hole from a bearing section (2b) to an approach section (2a) corresponding to an area reduction rate of 30% in an axial direction of the die hole, Ra2 represents a surface roughness of the inner surface of the die hole from the bearing section to the approach section corresponding to the area reduction rate of 30% in a direction orthogonal to the axial direction of the die hole, and Ra3 represents a surface roughness of an inner surface of the bearing section of the die hole in the axial direction of the die hole, the Ra1, the Ra2, and the Ra3 satisfy a relationship represented by 0.14 ?m>Ra2>Ra1>Ra3.Type: GrantFiled: March 25, 2015Date of Patent: November 19, 2019Assignee: BRIDGESTONE CORPORATIONInventor: Takayuki Saito
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Patent number: 10297384Abstract: A workpiece made of plate is subjected to a treatment which locally modifies its magnetic permeability. Subsequently, the magnetic permeability of the workpiece is examined locally resolved by a probe in order to find at least one surface region which is suitable for intended processing, and the processing is performed locally limited to the selected region.Type: GrantFiled: November 9, 2016Date of Patent: May 21, 2019Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Ronald Sanders, Hartmut Baumgart
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Patent number: 10235855Abstract: An anti-theft AM label is formed with a housing that includes concave and/or convex patterns and wordings on the upper surface thereof. The concave and/or convex patterns and wordings provide a different appearance for anti-theft AM labels that can deter shoplifters from finding and removing the labels from the goods the labels are protecting. The concave and/or convex patterns can be the logo of the store in which the labels are used. The upper surface of the housing can be formed with a cold forming process or a hot forming process. The shape of the housing can be varied between square, rectangular, circular, sector and oval configurations, as desired by the customer. The depth of the patterns and words relative to a flat portion of the upper surface of the housing is in the range of 0.05-1.0 mm or, more preferably, in the range of 0.2-1.0 mm.Type: GrantFiled: October 3, 2016Date of Patent: March 19, 2019Assignee: Ningbo Signatronic Technologies, Ltd.Inventor: Lin Li
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Patent number: 10072943Abstract: The present invention relates to a method for producing a magnetic substrate for an encoder scale. The method comprising the step of mechanically working the substrate, wherein the substrate is cooled prior to the mechanical working step. In one embodiment, a stainless steel substrate is used. The stainless steel may comprise an austenite (non-magnetic) phase and a martensite (magnetic) phase. Mechanically working and cooling in this manner increases the amount of magnetic (martensite) phase material that is formed, thereby improving the magnetic contrast when non-magnetic (austenite) marking are subsequently formed on the substrate by laser marking.Type: GrantFiled: March 5, 2012Date of Patent: September 11, 2018Assignees: RLS MERILNA TEHNIKA D.O.O., RENISHAW PLCInventors: Peter Kogej, Vojteh Leskovsek
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Patent number: 10043606Abstract: An internal structure of a magnetic material is phase-separated into at least a first phase and a second phase. At least one of the first phase and the second phase includes a compound having a perovskite structure. The first phase and the second phase include Mn, Sn, and N. According to this, it is possible to obtain a magnetic material in which magnetic properties such as a coercive force are improved. In addition, in a case where a rare-earth element is not included in elements that constitute the magnetic material, it is possible to obtain a magnetic material having corrosion resistance.Type: GrantFiled: January 7, 2014Date of Patent: August 7, 2018Assignee: Japan Science and Technology AgencyInventors: Satoshi Sugimoto, Keita Isogai
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Patent number: 10010018Abstract: Provided are a magnetic field shield sheet for a wireless charger, a method of manufacturing the sheet, and a receiver for the wireless charger by using the sheet. The sheet includes at least one layer thin magnetic sheet made of an amorphous ribbon separated into a plurality of fine pieces; a protective film that is adhered on one surface of the thin magnetic sheet via a first adhesive layer provided on one side of the protective film; and a double-sided tape that is adhered on the other surface of the thin magnetic sheet via a second adhesive layer provided on one side of the double-sided adhesive tape, wherein gaps among the plurality of fine pieces are filled by some parts of the first and second adhesive layers, to thereby isolate the plurality of fine pieces.Type: GrantFiled: November 25, 2015Date of Patent: June 26, 2018Assignee: AMOSENSE CO., LTD.Inventors: Dong Hoon Lee, Kil Jae Jang
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Patent number: 9930818Abstract: Provided are a magnetic field shield sheet for a wireless charger, a method of manufacturing the sheet, and a receiver for the wireless charger by using the sheet. The sheet includes at least one layer thin magnetic sheet made of an amorphous ribbon separated into a plurality of fine pieces; a protective film that is adhered on one surface of the thin magnetic sheet via a first adhesive layer provided on one side of the protective film; and a double-sided tape that is adhered on the other surface of the thin magnetic sheet via a second adhesive layer provided on one side of the double-sided adhesive tape, wherein gaps among the plurality of fine pieces are filled by some parts of the first and second adhesive layers, to thereby isolate the plurality of fine pieces.Type: GrantFiled: November 25, 2015Date of Patent: March 27, 2018Assignee: AMOSENSE CO., LTD.Inventors: Dong Hoon Lee, Kil Jae Jang
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Patent number: 9843241Abstract: A motor according to an embodiment includes a motor body, a rotating body, and a magnetic field sensor. The motor body rotates a shaft about the axis line thereof. The rotating body includes a permanent magnet and rotates along with the rotation of the shaft. The magnetic field sensor includes a magnet body having a large Barkhausen effect with the long direction thereof serving as the easy magnetization direction and is positioned to face the permanent magnet when the rotational position of the rotating body is at a given rotational position. The easy magnetization direction of the magnetic body is in a direction along a plane orthogonal to the rotation center line of the rotating body.Type: GrantFiled: June 18, 2014Date of Patent: December 12, 2017Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Shirou Yoshidomi, Ikuma Murokita
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Patent number: 9689723Abstract: Disclosed is a batteryless counter (1) for gas or water meters having at least one Wiegand sensor (2) or another power generating element and an evaluation circuit (10) connected thereto for processing a pulse (31), and the batteryless counter (1) feeds the pulses (31) generated and processed by the Wiegand sensor (2) to an isolator (17), and that at the output of this isolator (17) a pulse duration setting (18) is disposed, which processes the pulses (31) simultaneously counted via the counting circuit (4) by a pulse selection circuit (6) and converts the other pulse shapes/pulse frequencies and guides them outwards.Type: GrantFiled: January 25, 2014Date of Patent: June 27, 2017Assignee: HENGSTLER GMBHInventors: George Efimov, Michael Mixner
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Patent number: 9548073Abstract: Systems and methods for providing high performance soft magnetic underlayers for magnetic recording media are described. One such magnetic recording medium includes a substrate, an amorphous soft magnetic underlayer including CoFeMoNb on the substrate, where an atomic percent of the Mo is greater than about 8 and an atomic percent of the Nb is greater than about 9, and a magnetic recording layer on the soft magnetic underlayer.Type: GrantFiled: March 13, 2013Date of Patent: January 17, 2017Assignee: WD Media, LLCInventors: Iwao Okamoto, Debashish Tripathy, Fei Qin
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Patent number: 9508333Abstract: A magnetoelectric pickup device for use with a stringed musical instrument combines magnetostriction and the piezoelectric effect to detect a combination of magnetic field oscillations produced by a vibrating ferromagnetic string and acoustic vibrations from the body of the instrument itself. The result is a sound reproduction that preserves the natural acoustic timbre of the instrument.Type: GrantFiled: January 17, 2014Date of Patent: November 29, 2016Assignee: Northeastern UniversityInventor: Scott M. Gillette
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Patent number: 9362032Abstract: A high-strength non-oriented electrical steel sheet contains: in mass %, C: 0.010% or less; Si: not less than 2.0% nor more than 4.0%; Mn: not less than 0.05% nor more than 0.50%; Al: not less than 0.2% nor more than 3.0%; N: 0.005% or less; S: not less than 0.005% nor more than 0.030%; and Cu: not less than 0.5% nor more than 3.0%, a balance being composed of Fe and inevitable impurities. An expression (1) is established where a Mn content is represented as [Mn] and a S content is represented as [S], and not less than 1.0×104 pieces nor more than 1.0×106 pieces of sulfide having a circle-equivalent diameter of not less than 0.1 ?m nor more than 1.0 ?m are contained per 1 mm2 10?[Mn]/[S]?50??(1).Type: GrantFiled: April 11, 2012Date of Patent: June 7, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yoshihiro Arita, Masahiro Fujikura, Hidekuni Murakami
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Patent number: 8974608Abstract: A powder magnetic core with improved high frequency magnetic characteristics and reduced eddy current loss is manufactured by a manufacturing method including the steps of (a) providing coated soft magnetic particles which are particles composed of soft magnetic material which each have been coated with an insulating coating, and insulator particles; (b) forming a magnetic layer by press molding the coated soft magnetic particles in a mold assembly; (c) forming an insulator layer on the magnetic layer by press molding the insulator particles in the mold assembly; and (d) repeating the steps (b) and (c) to fabricate a laminate of alternating magnetic layers and insulator layers and provide the powder magnetic core.Type: GrantFiled: April 16, 2008Date of Patent: March 10, 2015Assignee: Fuji Electric Co., Ltd.Inventors: Takayuki Hirose, Masaharu Edo, Akira Sato
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Publication number: 20140332117Abstract: High-Mn austenitic stainless steels having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.0028 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass % with the balance being Fe and inevitable impurities, provided that these components are contained so that ? cal represented by the following equation is not more than 5.5%: ? cal (mass %)=(Cr+0.48Si)?(Ni+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7, wherein each element symbol in the equation is a content of the respective element (mass %), and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.Type: ApplicationFiled: February 21, 2014Publication date: November 13, 2014Applicant: NIPPON YAKIN KOGYO CO., LTD.Inventors: Shigeru HIRATA, Yuji IKEGAMI, Kazuhiro YAMAKAWA
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Publication number: 20140332118Abstract: An intermetallic or iron aluminide magnetically readable medium and a method of forming and reading the same are provided herein. Also provided is an identification card or tag, a key, an anti-counterfeiting measure, an anti-forging measure. The intermetallic or iron aluminide magnetically readable medium includes a magnetically readable surface, wherein the magnetically readable surface contains one or more first magnetically readable regions of the intermetallic or iron aluminide surrounded by one or more second magnetically readable regions. Additionally, the intermetallic or iron aluminide magnetically readable medium can be coated, encapsulated or concealed within a material.Type: ApplicationFiled: July 7, 2014Publication date: November 13, 2014Inventors: Seetharama C. Deevi, Kudumboor Venkat Rao, Valter Strom, Ziyan Gu
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Publication number: 20140326364Abstract: Embodiments of the present invention comprise; annealing steel sheets (e.g., hot rolled steel sheets or thin cast strip steel); cold rolling the sheets in one or more cold rolling passes (e.g., with an annealing steep between multiple cold rolling passes); and performing one or more of tension leveling, a rough rolling, or a coating process on the sheets after cold rolling, without an intermediate annealing step between the final cold rolling pass and the tension leveling, the rough rolling, or the coating process. In order to achieve the desired properties for the steel sheet, stamping and final annealing may be performed. The new process provides an electrical steel with the similar, same, or better magnetic properties than an electrical steel manufactured using the traditional processing that utilizes an intermediate annealing step after cold rolling and before the stamping and final annealing.Type: ApplicationFiled: July 17, 2014Publication date: November 6, 2014Inventors: Theodore E. Hill, Eric E. Gallo
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Publication number: 20140299233Abstract: A method for manufacturing a strip in a soft magnetic alloy capable of being cut out mechanically, the chemical composition of which comprises by weight: 18%?Co?55% 0%?V+W?3% 0%?Cr?3% 0%?Si?3% 0%?Nb?0.5% 0%?B?0.05% 0%?C?0.1% 0%?Zr+Ta?0.5% 0%?Ni?5% 0%?Mn?2% The remainder being iron and impurities resulting from the elaboration, according to which a strip obtained by hot rolling is cold-rolled in order to obtain a cold-rolled strip with a thickness of less than 0.6 mm. After cold rolling, a continuous annealing treatment is carried out by passing into a continuous oven, at a temperature comprised between the order/disorder transition temperature of the alloy and the onset temperature of ferritic/austenitic transformation of the alloy, followed by rapid cooling down to a temperature below 200° C. Strip obtained.Type: ApplicationFiled: December 17, 2012Publication date: October 9, 2014Applicant: APERAMInventors: Thierry Waeckerle, Remy Batonnet
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Publication number: 20140299232Abstract: The present technology relates to a Ni—Mn—Ga magnetic shape memory (MSM) alloy including twin boundaries type 2, which are deviated approximately +/?2-4 degrees from (101) or equivalent crystallographic plane by rotation about [?101] or equivalent crystallographic direction. This technology relates also to an actuator, sensor and harvester including MSM element of this technology.Type: ApplicationFiled: May 21, 2012Publication date: October 9, 2014Applicant: ADAPTIVE MATERIALS TECHNOLOGY - ADAPTAMAT OYInventors: Yossef Ezer, Oleksii Sozinov, Ladislav Straka, Aleksandr Soroka, Nataliya Lanska
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Patent number: 8795449Abstract: The present invention relates to a Fe—Ga—Al-based magnetostrictive thin-sheet material and a process for preparation thereof. The raw materials used for production of the thin-sheet material is composed of the components according to the general Formula, Fe100-x-y-zGaxAlyMz, wherein x=10-30, y=1-10, and z=0.1-5, and M is any one, or more elements selected from V, Cr, Zr, Sb, Sn, Ti, SiC.Type: GrantFiled: February 18, 2011Date of Patent: August 5, 2014Assignee: Beijing Magoriental Materials Technology Co., Ltd.Inventors: Xuexu Gao, Jiheng Li, Maocai Zhang, Jie Zhu, Lina Dong
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Publication number: 20140166158Abstract: High-Mn austenitic stainless steels having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.0028 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass % with the balance being Fe and inevitable impurities, provided that these components are contained so that ? cal represented by the following equation is not more than 5.5%: ? cal (mass %)=(Cr+0.48Si)?(Ni+0.11Mn?0.0101Mn2+26.4C+20.1N)?4.7, wherein each element symbol in the equation is a content of the respective element (mass %), and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.Type: ApplicationFiled: February 21, 2014Publication date: June 19, 2014Applicant: NIPPON YAKIN KOGYO CO., LTD.Inventors: Shigeru HIRATA, Yuji IKEGAMI, Kazuhiro YAMAKAWA
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Patent number: 8656751Abstract: Disclosed are an apparatus and a method for manufacturing an implant having a screw thread on an inner peripheral surface or an outer peripheral surface thereof by die-casting or pressing an amorphous alloy. The apparatus for manufacturing an implant using an amorphous alloy includes: a heating unit for heating a pre-form formed of an amorphous alloy into a semi-solid state; a forming unit for forming a screw thread in the heated pre-form by using a pressing mold; and a cooling unit for cooling the pre-form having the screw thread.Type: GrantFiled: June 20, 2011Date of Patent: February 25, 2014Inventor: Ho Do Lee
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Publication number: 20130129985Abstract: A grain oriented electrical steel sheet may reduce iron loss of material with linear grooves formed thereon for magnetic domain refinement and offer excellent low iron loss properties when assembled as an actual transformer, where the steel sheet has sheet thickness of 0.30 mm or less, linear grooves are formed at intervals of 2-10 mm in the rolling direction, the depth of each of the linear grooves is 10 ?m or more, the thickness of the forsterite film at bottom portions of the linear grooves is 0.3 ?m or more, total tension applied to the steel sheet by the forsterite film and tension coating is 10.0 MPa or higher in rolling direction, and the proportion of eddy current loss in iron loss W17/50 of the steel sheet is 65% or less when alternating magnetic field of 1.7 T and 50 Hz is applied to the steel sheet in the rolling direction.Type: ApplicationFiled: August 5, 2011Publication date: May 23, 2013Applicant: JFE STEEL CORPORATIONInventors: Hirotaka Inoue, Takeshi Omura, Hiroi Yamaguchi, Seiji Okabe
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Publication number: 20130130043Abstract: A grain oriented electrical steel sheet is subjected to magnetic domain refining treatment by electron beam irradiation and exhibits excellent low-noise properties when assembled as an actual transformer, in which a ratio (Wa/Wb) of a film thickness (Wa) of the forsierite film on a strain-introduced side of the steel sheet to a film thickness (Wb) of the forsierite film on a non-strain-introduced side of the steel sheet is 0.5 or higher, a magnetic domain discontinuous portion in a surface of the steel sheet on the strain-introduced side has an average width of 150 to 300 ?m, and a magnetic domain discontinuous portion in a surface of the steel sheet on the non-strain-introduced side has an average width of 250 to 500 ?m.Type: ApplicationFiled: August 3, 2011Publication date: May 23, 2013Applicant: JFE STEEL CORPORATIONInventors: Takeshi Omura, Hiroi Yamaguchi, Seiji Okabe
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Publication number: 20130129984Abstract: A grain oriented electrical steel sheet has thickness of forsterite film at bottom portions of grooves formed on a surface of the steel sheet is ?0.3 ?m, groove frequency is ?20%, abundance ratio of grooves crystal grains directly beneath themselves, each crystal grain having orientation deviating from Goss orientation by ?10° and grain size ?5 ?m, total tension exerted on the steel sheet in the rolling direction by the forsterite film and tension coating is ?10.0 MPa, total tension exerted on the steel sheet in a direction perpendicular to the rolling direction by the forsterite film and tension coating is ?5.0 MPa and total tension satisfies 1.0?A/B?5.0, where A is total tension exerted in rolling direction by forsterite film and tension coating, and B is total tension exerted in direction perpendicular to rolling direction by forsterite film and tension coating.Type: ApplicationFiled: August 5, 2011Publication date: May 23, 2013Applicant: JFE Steel CorporationInventors: Takeshi Omura, Hirotaka Inoue, Hiroi Yamaguchi, Seiji Okabe
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Patent number: 8277574Abstract: There is provided a method for manufacturing a grain-oriented electromagnetic steel sheet whose iron losses are reduced by laser beam irradiation, capable of improving the iron losses in both the L-direction and the C-direction while easily ensuring high productivity. The method for manufacturing a grain-oriented electromagnetic steel sheet reduces iron losses by scanning and irradiating a grain-oriented electromagnetic steel sheet with a continuous-wave laser beam condensed into a circular or elliptical shape at constant intervals in a direction substantially perpendicular to a rolling direction of the grain-oriented electromagnetic steel sheet, wherein when an average irradiation energy density Ua is defined as Ua=P/(Vc×PL) (mJ/mm2), where P (W) is average power of the laser beam, Vc (m/s) is a beam scanning velocity, and PL (mm) is an irradiation interval in a rolling direction, PL and Ua are in the following ranges: 1.0 mm?PL?3.0 mm, 0.8 mJ/mm2?Ua?2.0 mJ/mm2.Type: GrantFiled: December 11, 2008Date of Patent: October 2, 2012Assignee: Nippon Steel CorporationInventors: Tatsuhiko Sakai, Hideyuki Hamamura, Masao Yabumoto
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Patent number: 8268092Abstract: Provided are a magnetic sheet for use in a radio frequency identification (RFID) antenna, an RFID antenna including the magnetic sheet, and a method of manufacturing the magnetic sheet, in which the magnetic sheet includes an amorphous alloy selected from the group consisting of Fe—Si—B, Fe—Si—B—Cu—Nb, Fe—Zr—B and Co—Fe—Si—B. The magnetic sheet is made by laminating amorphous alloy ribbons made of an amorphous alloy between magnetic sheet layers formed of alloy powder including at least one amorphous alloy and then compression-molding the amorphous alloy ribbons, to thereby control microcrack of the amorphous alloy ribbons and enhance characteristic of an end-product. The magnetic sheet is also thin, and has an excellent magnetic permeability, and a simple manufacturing process.Type: GrantFiled: July 22, 2010Date of Patent: September 18, 2012Assignee: Amotech Co., Ltd.Inventors: Jae Suk Yang, Hyeon Chul Lim, Byoung Ki Lee, Yong Sup Lee, Yong Hyun Kim, Yong Sul Song, Sang Kyun Kwon, Beom Jin Kim
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Patent number: 8016951Abstract: An object of the present invention is to provide a grain-oriented electrical steel sheet with low core loss and low magnetostriction and a method for producing the same. The grain-oriented electrical steel sheet is excellent in reduced core loss and magnetostriction while under a high flux density of 1.9 T, comprises a refined magnetic domain comprising a laser irradiated portion which has melted and resolidified to form a solidified layer, wherein the thickness of the solidified layer is 4 ?m or less. The grain-oriented electrical steel sheet may further comprise a laser irradiated portion where a surface roughness Rz is small and a cross section viewed from a transverse direction has a concave portion having a width of 200 ?m or less and a depth of 10 ?m or less for further improvement.Type: GrantFiled: April 26, 2006Date of Patent: September 13, 2011Assignee: Nippon Steel CorporationInventors: Satoshi Arai, Hideyuki Hamamura, Tatsuhiko Sakai, Kaoru Sato, Hideyuki Kobayashi
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Patent number: 8012270Abstract: A soft magnetic alloy consists essentially of 5 percent by weight?Co?30 percent by weight, 1 percent by weight?Cr?20 percent by weight, 0.1 percent by weight?Al?2 percent by weight, 0 percent by weight?Si?1.5 percent by weight, 0.017 percent by weight?Mn?0.2 percent by weight, 0.01 percent by weight?S?0.05 percent by weight where Mn/S is >1.7, 0 percent by weight?O?0.0015 percent by weight, und 0.0003 percent by weight?Ce?0.05 percent by weight, 0 percent by weight?Ca?0.005 percent by weight and the remainder iron, where 0.117 percent by weight?(Al+Si+Mn+V+Mo+W+Nb+Ti+Ni)?5 percent by weight.Type: GrantFiled: July 24, 2008Date of Patent: September 6, 2011Assignee: Vacuumschmelze GmbH & Co. KGInventors: Witold Pieper, Joachim Gerster
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Publication number: 20110121677Abstract: A rotor for a permanent magnet electric motor includes a rotor core having a generally cylindrical shape with an outer circumferential surface and a rotational axis and a plurality of magnet insertion hole arrangements formed in the rotor core and arranged circumferentially at a preset angular interval about the rotational axis. Each hole arrangement has a radially inward side, a radially outward side, and two ends that are respectively spaced apart from the circumferential surface by respective bridge regions formed by the rotor core. The material of the bridge regions is metallurgically transformed by having its grain structure changed, e.g., by heating the material to at least its Curie temperature, whereby the material possesses greater magnetic reluctance than the material of adjacent portions of the rotor core.Type: ApplicationFiled: November 25, 2009Publication date: May 26, 2011Applicant: UQM TECHNOLOGIES, INC.Inventors: Josh LEY, Stanley Allan Betzold, Victor Chieduko
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Patent number: 7942984Abstract: A steel pipe blank having a composition containing 0.5% or less C and 85% or more Fe in terms of mass percent is heated, and stretch-reducing is then performed so that the diameter decrease ratio is 15% or more and the rolling finishing temperature is (the Ar3 transformation point?10)° C. or lower. Consequently, a structure in which the ratio of X-ray diffraction intensity obtained from the plane in which the <100> direction of crystal grains is preferentially oriented parallel to the circumference direction and the <011> direction of crystal grains is preferentially oriented parallel to the rolling direction of the steel pipe to that obtained for a three-dimensionally randomly oriented sample is 3.0 or more is formed, and the r-value is increased, thereby improving the magnetic properties of the steel pipe.Type: GrantFiled: September 1, 2005Date of Patent: May 17, 2011Assignee: JFE Steel CorporationInventors: Yasuhide Ishiguro, Yoshikazu Kawabata, Kei Sakata, Masayuki Sakaguchi, Masayoshi Ishida, Motoaki Itadani, Yasue Koyama
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Patent number: 7942981Abstract: A seamless, rotationally symmetrical hollow blank formed by a non-cutting operation from a deformable permanently magnetic alloy is provided, said alloy consisting essentially of 5.0 to 20.0 percent by weight cobalt, 20.0 to 35.0 percent by weight chromium, for the remainder iron and impurities caused by melting and/or by chance. The seamless hollow body is suitable in particular for use in hysteresis clutches, hysteresis brakes, and position measuring devices. Furthermore, non-cutting shaping processes for producing the seamless rotationally symmetrical hollow body are provided, with roller spinning being preferred.Type: GrantFiled: September 19, 2007Date of Patent: May 17, 2011Assignee: Vacuumschmelze GmbH & Co. KGInventors: Ottmar Roth, Hartwin Weber, Lutz Hinrich, Jens Diehl
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Patent number: 7815749Abstract: The present invention provides a method of manufacturing a semi-hard magnetic material comprising, sequentially: preparing a raw material consisting essentially of 10.0 to 25.0% of Ni, 2.0 to 6.0% of Mo and the balance being Fe and inevitable impurities, in mass %; heat-treating or hot-working the raw material so that it has not less than 90% of martensitic structure; cold-working the material at a reduction of area of not less than 50% so that it has an extended structure including not less than 95% of a martensitic structure; and heat-treating the material in a range of 400 to 570° C. so as to generate more than 0% but less than 30.0% of reverse-transformed austenitic structure. The semi-hard magnetic material manufactured using this method can possess a coercive force of 1000 to 5600 A/m.Type: GrantFiled: June 28, 2007Date of Patent: October 19, 2010Assignee: Hitachi Metals, Ltd.Inventor: Shinichiro Yokoyama
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Patent number: 7776259Abstract: A high strength and creep resistant soft magnetic Fe—Co alloy includes, in weight %, Fe and Co such that the difference between the Fe and Co is at least 2%, at least 35% Co, and 2.5%?(V+Mo+Nb), wherein 0.4%?Mo and/or 0.4%?Nb. This alloy can further include B, C, W, Ni, Ti, Cr, Mn and/or Al. A vanadium-free high strength soft magnetic Fe—Co alloy includes in weight %, Fe and Co such that the difference between the Fe and Co is at least 2%, and at least 15% Co, the alloy further satisfying (0.1%?Nb and 0.1%?W) or 0.25%?Mn. This alloy can further include B, C, Ni, Ti, Cr and/or Al.Type: GrantFiled: August 9, 2005Date of Patent: August 17, 2010Assignee: Philip Morris USA Inc.Inventors: Seetharama C. Deevi, Rangaraj S. Sundar
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Patent number: 7754027Abstract: A method for manufacturing a sputtering target includes the steps of: providing a highly pure matrix material containing a magnetic metal, and a highly pure precious metal ingot material; cleaning the surfaces of the matrix material and the precious metal ingot; vacuum melting the matrix material and the precious metal ingot to obtain a molten alloy; pouring the molten alloy in a mold having a cooling system while maintaining a surface of the molten alloy at a molten state by arc heating until the pouring is finished, thereby forming the molten alloy into a cast blank; hot working the cast blank; and annealing the cast blank after the hot working.Type: GrantFiled: August 27, 2007Date of Patent: July 13, 2010Assignee: China Steel CorporationInventors: Rong-Zhi Chen, Jye-Long Lee, In-Ting Hong, Jui-Tung Chang, Pa-Tsui Sze
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Patent number: 7658807Abstract: The present invention relates to a hot-rolled steel strip for further processing to form non-grain oriented electrical sheet with the following composition (in % by weight) C: <0.02%, Mn: ?1.2%, Si: 0.1-4.4%, Al 0.1-4.4%, wherein the sum formed from the Si content and twice the Al content is <5%, P: <0.15%, Sn: ?0.20%, Sb: ?0.20%, the remainder iron and unavoidable impurities, with a strip thickness which is at most 1.8 mm, and with a partially softened structure which is characterised by a high intensity for the ? fibre (fibre representation of orientation distribution functions) in the region of 0° to 60°, wherein the ratio I112/I001 formed from the intensity I112 of the position (112) <110> to the intensity I001 of the position (001) <110> is >0.4 and the ratio I111/I001 formed from the intensity I111 of the position (111) <110> to the intensity I001 of the position (001) <110> is >0.2.Type: GrantFiled: October 23, 2002Date of Patent: February 9, 2010Assignee: ThyssenKrupp Steel AGInventors: Karl Ernst Friedrich, Wolfgang Rasim, Joergen Schneider, Rudolf Kawalla, Carl-Dieter Wuppermann
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Publication number: 20100018610Abstract: The invention relates to a method and to a device for carrying out a manufacturing process in which all magnet cores to be produced are first continuously crystallized. Depending on whether the required hysteresis loops should be round, flat or rectangular, the magnet cores are either immediately finished, that is enclosed in housings, conditioned to a rectangular hysteresis loop in a direct-axis magnetic field or to a flat hysteresis loop in a magnetic cross-field and then finished.Type: ApplicationFiled: June 17, 2009Publication date: January 28, 2010Applicant: Vaccumschmelze GmbH & CO. KGInventors: Jorg Petzold, Volker Kleespies, Hans-Rainier Hilzinger
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Patent number: 7513959Abstract: When a non-oriented electrical steel sheet is manufactured, simultaneously having superior magnetic properties and high strengths, a composition containing 0.02% or less of C, 4.5% or less of Si, 5.0% or less (including 0) of Ni, and 0.2% to 4.0% of Cu is used, and a solute Cu is allowed to appropriately remain in finish annealing. In the steel sheet thus obtained, finely shaped Cu is precipitated by aging treatment, and while the magnetic properties are not degraded, the yield stress is increased to not less than CYS (MPa) represented by the following formula: note CYS=180+5,600[% C]+95[% Si]+50[% Mn]+37[% Al]+435[% P]+25[% Ni]+22d?1/2 where d is an average grain diameter (mm) of crystal grains.Type: GrantFiled: December 3, 2003Date of Patent: April 7, 2009Assignee: JFE Steel CorporationInventors: Minoru Takashima, Masaaki Kohno, Katsumi Yamada, Masaki Kawano, Kaoru Sato
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Patent number: 7501029Abstract: A high-strength, high-permeability steel sheet for picture tube band comprises, in mass percent, C: 0.003-0.010%, Si: 0.5-1.0%, Mn: 1.0-2.0%, P: 0.04-0.15%, S: not more than 0.02%, Al: not more than 0.030%, N: not more than 0.004% and the balance of Fe and unavoidable impurities, has a chemical composition satisfying C×Mn×P?2.5×10?4, and has a ferrite crystal grain diameter of 10-100 ?m and a yield stress of 300 N/mm2 or higher, and preferably has a specific permeability ?0.35 in a DC magnetic field of 0.35 Oe of 400 or higher. The steel sheet can be produced by regulating the hot-rolling coiling temperature to 600-700° C. and selecting an appropriate combination of the cold rolling reduction ratio and a final annealing temperature in the range of 750-900° C.Type: GrantFiled: April 12, 2004Date of Patent: March 10, 2009Assignee: Nisshin Steel Co., Ltd.Inventors: Tsunetoshi Suzaki, Kentaro Hirata, Yuichi Higo
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Publication number: 20080277398Abstract: Welded 36% Ni—Fe alloy steel and a method of making such welded steel for use in storage tanks, pipelines, and other equipment associated with cryogenic substances is disclosed. The welded steel has a similar coefficient of thermal expansion in both the weld and base steel.Type: ApplicationFiled: May 9, 2007Publication date: November 13, 2008Applicant: ConocoPhillips CompanyInventor: Stuart L. Wilson