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| Number | Title | Issue Date |
| 7988795 | R-T-B—C rare earth sintered magnet and making method An R-T-B—C rare earth sintered magnet (R═Ce, Pr, Nd, Tb, or Dy; T=Fe) is obtained by mixing an R-T-B—C magnet matrix alloy with an R fluoride and an R-rich R-T-B—C sintering aid alloy, followed by pulverization, compaction and sintering. The sintered structu... | 08/02/2011 |
| 7955442 | Method for producing sintered magnet and alloy for sintered magnet The present invention provides a method for producing a sintered magnet, which can have a sufficient sintered density even when the magnet has a low-R composition. The method is for producing a sintered magnet comprising R (R: one or more rare-earth elements), T (T:... | 06/07/2011 |
| 7942981 | Rotationally symmetrical hollow body made of a deformable permanently magnetic alloy and its use and production process 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 ... | 05/17/2011 |
| 7645349 | Sintered R-Fe-B permanent magnet and its production method A sintered permanent magnet having a composition comprising, by mass, 27-33.5% of R, which is at least one of rare earth elements including Y, 0.5-2% of B, 0.002-0.15% of N, 0.25% or less of O, 0.15% or less of C, and 0.001-0.05% of P, the balance being Fe, wherein ... | 01/12/2010 |
| 7531050 | Method for manufacturing bonded magnet and method for manufacturing magnetic device having bonded magnet A viscous material (4) is obtained by mixing an alloy magnetic powder, magnetized in advance, with a resin. The viscous material (4) thus obtained is applied to an upper surface of a center magnetic leg of an E-shaped core (2). A coil (3)... | 05/12/2009 |
| 7441324 | Method for preventing magnetic damage to a GMR head during back-end processing A method is provided for preserving the transverse biasing of a GMR (or MR) read head during back-end processing. In a first preferred embodiment, the method comprises magnetizing the longitudinal biasing layers of the read head in a transverse direction, so that th... | 10/28/2008 |
| 7416613 | Method for compacting magnetic powder in magnetic field, and method for producing rare-earth sintered magnet A method for compacting a magnetic powder in a magnetic field comprising steps of filling a die with a magnetic powder, applying a pulsed magnetic field to the magnetic powder in the die to orientate the powder, and compressing the magnetic powder, wherein the pulse... | 08/26/2008 |
| 7399368 | Motor using magnet A permanent magnet comprises a hard magnetic material that contains at least a rare earth element and an anti-ferromagnetic material, wherein the hard magnetic material and the anti-ferromagnetic material are magnetically coupled. A volume ratio of the anti-ferromag... | 07/15/2008 |
| 7396419 | Method for preparing sintered product, sintered product and magnetostriction material A method for manufacturing a sintered compact includes the steps of preparing an alloy powder having a composition represented by Expression 1: RTW (where, R is at least one kind of rare earth metal, T is at least one kind of transition metal, and w defin... | 07/08/2008 |
| 7390369 | Method for producing rare earth based alloy powder and method for producing rare earth based sintered magnet An inventive method of making a rare-earth alloy powder is used to produce a rare-earth sintered magnet, whose main phase has a composition R2T14A (where R is one of the rare-earth elements including Y; T is Fe with or without a non-Fe transiti... | 06/24/2008 |
| 7384487 | Method for producing magnetostrictive element and container for sintering It is an object of the present invention to provide a method for producing a magnetostrictive element, capable of assuredly producing a magnetostrictive element by powder metallurgy. In a container for sintering 10, a compact 100 is sintered into a mag... | 06/10/2008 |
| 7371292 | Nd-Fe-B type anisotropic exchange spring magnet and method of producing the same A Nd—Fe—B type anisotropic exchange spring magnet is produced by a method of obtaining powder of a Nd—Fe—B type rare earth magnet alloy which comprises hard magnetic phases and soft magnetic phases wherein a minimum width of the soft magnetic phases is small... | 05/13/2008 |
| 7372195 | Electron beam source having an extraction electrode provided with a magnetic disk element An electron beam source for use in an electron gun. The electron beam source includes an emitter terminating in a tip. The emitter is configured to generate an electron beam. The electron beam source further includes a suppressor electrode laterally surrounding the ... | 05/13/2008 |
| 7371477 | Exhaust gas processing device for fuel cell Hydrogen gas supplied to and then purged from a fuel cell is temporarily retained in a reservoir provided in an exhaust fuel diluter, and diluted before release into atmosphere. Cathode exhaust gas discharged from a cathode of the fuel cell is mixed to dilute the hy... | 05/13/2008 |
| 7372116 | Heat assisted switching in an MRAM cell utilizing the antiferromagnetic to ferromagnetic transition in FeRh A magnetic memory cell for use in a magnetic random access memory array that uses the antiferromagnetic to ferromagnetic transition properties of FeRh to assist in the control of switching of the memory cell. ... | 05/13/2008 |
| 7371290 | Production method for permanent magnet and press device To avoid various problems caused by remnant magnetization and produce an anisotropic bonded magnet at a reduced cost, a method for producing an anisotropic bonded magnet by feeding a magnetic powder (such as an HDDR powder) into the cavity of a press machine and com... | 05/13/2008 |
| 7364628 | Solid material for magnet A solid material for a magnet, comprising a rare-earth/iron/nitrogen/hydrogen system magnetic material. ... | 04/29/2008 |
| 7347681 | Permanent magnet molding apparatus This invention relates to a permanent magnet molding apparatus and has as an object an improvement in productivity and reliability thereof. This invention includes a transferable metal die unit (7) including a die having a cavity of a desired cross-sectional ... | 03/25/2008 |
| 7344606 | Permanent magnet manufacturing method and press apparatus An anisotropic bonded magnet is produced at a low cost by avoiding various problems caused by remanence. Also, the unit weight and density of a compact is increased by filling even a cavity, having no easily feedable shape, with a magnet powder just as intended. An ... | 03/18/2008 |
| 7344653 | Method for producing and magnetising a bitumen film containing magnetic powder A bitumen film containing magnetic powder is heated prior to magnetization to a temperature enabling the magnetic powder particles to be oriented according to the effect of the magnetic field. The bitumen film is sufficiently cooled after magnetization in order to p... | 03/18/2008 |
| 7344605 | Exchange spring magnet powder and a method of producing the same An anisotropic exchange spring magnet powder complexing a hard magnetic material and a soft magnetic material, wherein a rare earth metal element, a transition metal element, boron and carbon and the like are contained, and the hard magnetic material and soft magnet... | 03/18/2008 |
| 7338566 | Alloy for sm-co based magnet, method for production thereof, sintered magnet and bonded magnet The present invention relates to a Sm—Co based magnet alloy useful as a raw material for producing magnets having high magnetic properties, such as sintered or bonded magnets, methods for producing such an alloy, and sintered or bonded magnets having excellent cor... | 03/04/2008 |
| 7320169 | Self-pinned GMR structure by annealing In a conventional spin valve the shunt resistance of the pinning layer reduces the overall efficiency of the device. This problem has been overcome by using IrMn for the pinning layer at a thickness of about 20 Angstroms or less. For the IrMn to be fully effective i... | 01/22/2008 |
| 7314530 | Press and magnet manufacturing method A press machine 10 includes a die 12 with a through hole 12a that defines a cavity, a first press surface 14a and a second press surface 16a for pressing a magnetic powder 18 loaded in the cavity, and ma... | 01/01/2008 |
| 7302867 | Magnetic transducer torque measurement A magnetic transducer element is formed by rotating an integral region of a shaft about an axis in the presence of a magnetic source. An annulus of magnetization results in having its magnetization in the axial direction. The exterior magnetic field emanated by the ... | 12/04/2007 |
| 7256280 | Cell cycle nucleic acids, polypeptides and uses thereof The invention provides isolated nucleic acids and their encoded proteins that are involved in cell cycle regulation. The invention further provides recombinant expression cassettes, host cells, transgenic plants, and antibody compositions. The present invention prov... | 08/14/2007 |
| 7255751 | Method for manufacturing R-T-B system rare earth permanent magnet When an R-T-B system rare earth permanent magnet is obtained by a mixing method to obtain a sintered body with a composition consisting essentially of 25% to 35% by weight of R (wherein R represents one or more rare earth elements, providing that the rare earth elem... | 08/14/2007 |
| 7255752 | Method for manufacturing R-T-B system rare earth permanent magnet A method for manufacturing an R-T-B system rare earth permanent magnet that is a sintered body comprising a main phase consisting of an R2T14B phase (wherein R represents one or more rare earth elements (providing that the rare earth elements i... | 08/14/2007 |
| 7244318 | Method for preparation of permanent magnet A blended powder including a first powder containing an R2T14B phase as a main phase, and a second powder containing an R2T17 phase at 25 wt % or more of the whole is prepared. Herein, R is at least one element selected fr... | 07/17/2007 |
| 7232495 | Method of magnetizing rare-earth magnet and rare-earth magnet The method of the present invention includes a step of preparing a rare earth magnet 22 disposed for forming a cylinder 22a, a first magnetizing step of applying a first external magnetic field H1 to the rare earth magnet 22, there... | 06/19/2007 |
| 7211157 | Rare-earth alloy, rare-earth sintered magnet, and methods of manufacturing A rare-earth alloy ingot is produced by melting an alloy composed of 20–30 wt % of a rare-earth constituent which is Sm alone or at least 50 wt % Sm in combination with at least one other rare-earth element, 10–45 wt % of Fe, 1–10 wt % of Cu and 0.5–5 wt % o... | 05/01/2007 |
| 7207102 | Method for forming permanent magnets with different polarities for use in microelectromechanical devices Methods are provided for forming a plurality of permanent magnets with two different north-south magnetic pole alignments for use in microelectromechanical (MEM) devices. These methods are based on initially magnetizing the permanent magnets all in the same directio... | 04/24/2007 |
| 7204891 | Remelting of rare earth magnet scrap and/or sludge, magnet-forming alloy, and sintered rare earth magnet Rare earth magnet scrap and/or sludge is remelted for reuse. Once a rare earth-free magnet-constituent metal feed is loaded in a melting furnace and heated into a melt, a rare earth-containing metal feed and the rare earth magnet scrap and/or sludge are added to the... | 04/17/2007 |
| 7201809 | Radial anisotropic ring magnet and method of manufacturing the ring magnet A radially anisotropic ring magnet endowed with good magnetic characteristics and having throughout the magnet an angle of 80 to 100° between a center axis thereof and a radial anisotropy imparting direction is manufactured by a pressing operation. ... | 04/10/2007 |
| 7175718 | Rare earth element permanent magnet material A material for a rare earth permanent magnet having a high magnetic coercive force and a high residual magnetic flux density. 28 to 35% by weight of at least one rare earth element selected from the group consisting of neodymium, praseodymium, dysprosium, terbium, a... | 02/13/2007 |
| 7175404 | Composite powder filling method and composite powder filling device, and composite powder molding method and composite powder molding device The present invention is an apparatus for filling a multi-powder including a powder box (10) including a plurality of powder chambers storing a plurality of powders whose constituent compositions differ in a divided manner, and a gas feed pipe (14) dis... | 02/13/2007 |
| 7166171 | Longitudinal magnetic field compacting method and device for manufacturing rare earth magnets Disclosed is a longitudinal magnetic field compacting method and device for manufacturing a neodymium (Nd) based rare earth magnet in the shape of a butterfly for use in VCM of HDD or DVD, a disk or coin for use in coreless motors, and a block for use in linear moto... | 01/23/2007 |
| 7146708 | Method of making a composite electric machine rotor assembly A method of making composite electric machine rotor assembly of a desired magnetic pattern. Magnetic segments and non-magnetic segments are separately formed to green strength, and then arranged adjacent to each other in a desired magnetic pattern. A small amount of... | 12/12/2006 |
| 7147686 | Rare earth magnet, method for manufacturing the same, and motor using rare earth magnet A rare earth magnet comprises rare earth magnet particles and a rare earth oxide being present between the rare earth magnet particles. The rare earth oxide is represented by a following general formula (I): R2O3 (I) | 12/12/2006 |
| 7144463 | Highly quenchable Fe-based rare earth materials for ferrite replacement The present invention relates to highly quenchable Fe-based rare earth magnetic materials that are made by rapid solidification process and exhibit good magnetic properties and thermal stability. More specifically, the invention relates to isotropic Nd—Fe—B type... | 12/05/2006 |
