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Hitachi Metals, Ltd. Patents
Assignee:
Hitachi Metals, Ltd.
Address:
Tokyo, JP
No. of patents:
969
Patents:


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Patent Number Title Of Patent Date Issued
RE40524 Magnet powder-resin compound particles, method for producing such compound particles and resin-b September 30, 2008
The magnet powder-resin compound particles substantially composed of rare earth magnet powder and a binder resin are in such a round shape that a ratio of the longitudinal size a to the transverse size b (a/b) is more than 1.00 and 3 or less, and that an average particle size defined by
RE40348 Arc segment magnet, ring magnet and method for producing such magnets June 3, 2008
A thin arc segment magnet made of .[.a.]. .Iadd.an R-T-B based, .Iaddend.rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially .[.Fe.]. .Iadd.T.Iaddend., wherein R is at least one rare earth element includin
RE38042 Anisotropic magnetic powder and magnet thereof and method of producing same March 25, 2003
A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 .mu.m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 .mu.m, wherein R represents one or more rare earth elements including Y,
RE38021 Anisotropic magnetic powder and magnet thereof and method of producing same March 11, 2003
A the magnetically anisotropic magnetic powder having an average particle size of 1--1000 .mu.m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 .mu.m, wherein R represents one or more rare earth elements including Y
RE37834 Magnetic roll and method of producing same September 10, 2002
.[.The magnet roll according to the present invention comprising a cylindrical resin-bonded magnet, a first shaft formed by injection molding integrally with the cylindrical resin-bonded magnet at one end thereof, and a second shaft press-fitted into a bore of the cylindrical resin-b
RE33770 Heat-fixing apparatus December 17, 1991
A heat-fixing apparatus comprising a heating roll to be brought into contact with a toner image borne on a sheet member, a pressure roll in pressed contact with the heating roll to provide a nip portion therebetween, each of the heating roll and the pressure roll being constituted by
RE33022 Ferromagnetic amorphous alloy August 15, 1989
A ferromagnetic amorphous alloy having a composition represented by (Co.sub.x Ni.sub.y Fe.sub.z).sub.a M.sub.b G.sub.c, wherein M is Cr, Mo and/or W, G is Zr, Hf and/or Ti and x,y,z and a, b, c are selected to meet the conditions of x=1-y-z, 0.ltoreq.y.ltoreq.0.2, 0.ltoreq.z.ltoreq.0.7,
RE32005 Magnetic alloy having a low melting point October 15, 1985
A magnetic alloy having a relatively low melting point, particularly for dental use.The low melting point magnet alloy contains one or more elements of Co and Ni, a Co content of which being in the range of 79 wt. % or less, a Ni content being in the range of 80 wt. % or less, the remain
D376602 Exhaust manifold for an internal combustion engine December 17, 1996
D372250 Exhaust manifold for an internal combustion engine July 30, 1996
8587295 Angle detection apparatus and position detection apparatus November 19, 2013
An angle detection apparatus comprising a magnet rotor having a multi-pole segment magnet, and a magnetic sensor for detecting the direction of a magnetic flux generated from the multi-pole segment magnet; the multi-pole segment magnet having pluralities of magnetic poles along the r
8586493 Silicon nitride sintered body, method of producing the same, and silicon nitride circuit substra November 19, 2013
A silicon nitride sintered body, wherein in a silicon nitride substrate consisting of crystal grains of .beta.-type silicon nitride and a grain boundary phase containing at least one type of rare earth element (RE), magnesium (Mg) and silicon (Si), the grain boundary phase consists of an
8586196 Aluminum plated film and metallic member November 19, 2013
A plating film is provided with enough hardness before anodic oxidation, which is hard to be damaged during handling, and also the production method of the plating film. This problem can be solved by an aluminum plating film with aluminum concentration of 98 wt. % or lower, and with a
8582547 High frequency circuit, high frequency component and communication device November 12, 2013
An inventive high frequency circuit includes a switch circuit (SPDT1), connected to an antenna terminal (Ant1), using a field-effect transistor for switching between a connection with first to third transmitting terminals (Tx1-1, Tx2-1, Tx3-1) and a connection with first to third rec
8564380 Non-reciprocal circuit device and its central conductor assembly October 22, 2013
A central conductor assembly for a non-reciprocal circuit device, at least a first central conductor constituting a first inductance element and a second central conductor constituting a second inductance element being integrally formed in a laminate comprising pluralities of magnetic
8564283 Rotation-angle-detecting apparatus, rotating machine and rotation-angle-detecting method October 22, 2013
An apparatus for detecting a rotation angle using a magnet rotor comprising a magnet having 2N poles, wherein N is a natural number, and a sensor device for detecting the direction of a magnetic flux from the magnet rotor, at least one of two output voltages obtained in radial and ro
8564282 Angle sensor, angle sensor manufacturing method, and angle detection device using the angle sens October 22, 2013
There is provided an angle sensor and angle detection device of high output and high accuracy with a wide operating temperature range. First through eighth sensor units 511, 522, 523, 514, 531, 542, 543 and 534 are produced from spin valve magnetoresistive films that use a self-pinned
8563869 Circuit board and semiconductor module using this, production method for circuit board October 22, 2013
A circuit board and a semiconductor module with high endurance against thermal cycles, and which is hard to be broken under thermal cycles, even if thick metal circuit board and thick metal heat sink are used, corresponding to high power operation of a semiconductor chip are provided
8298999 Hard coating film excellent in lubrication characteristics, process for formation thereof, and t October 30, 2012
The invention aims at providing a hard coating film excellent in lubrication characteristics; a process for the formation thereof; and tools for the plastic working of metal, and provides a hard coating film covering the surface of a substrate to come into contact with other member,
8298355 Magnetic alloy, amorphous alloy ribbon, and magnetic part October 30, 2012
A soft magnetic alloy that in an FeCo nanocrystal soft magnetic material, exhibits a high saturation magnetic flux density of 1.85 T or more, and that ensures prolonged nozzle life and easy ribbon production; an amorphous alloy ribbon for use in production thereof; and magnetic parts
8292589 Casting aluminum alloy, cast compressor impeller comprising the alloy, and process for producing October 23, 2012
A casting aluminum alloy which contains, in terms of mass %, 3.2-5.0% Cu, 0.8-3.0% Ni, 1.0-3.0% Mg, 0.05-0.20% Ti, and up to 1.0% Si, the remainder being aluminum and incidental impurities. This casting aluminum alloy is used to produce a cast compressor impeller comprising a hub part, a
8287666 Nano-crystalline, magnetic alloy, its production method, alloy ribbon and magnetic part October 16, 2012
A magnetic alloy having a composition represented by the general formula of Fe.sub.100-x-yCu.sub.xB.sub.y (atomic %), wherein x and y are numbers meeting the conditions of 0.1.ltoreq.x.ltoreq.3, and 10.ltoreq.y.ltoreq.20, or the general formula of Fe.sub.100-x-y-zCu.sub.xB.sub.yX.sub
8287661 Method for producing R-T-B sintered magnet October 16, 2012
A method for producing a sintered R-T-B based magnet includes the steps of: providing R-T-B based alloy powders A and B so that the R-T-B based alloy powder B has a particle size D50 that is smaller by at least 1.0 .mu.m than that of the R-T-B based alloy powder A and that there is a
8282385 Die for molding ceramic honeycomb structure October 9, 2012
A die comprising molding grooves arranged in a lattice pattern and moldable-material-supplying holes communicating with the molding grooves for molding a ceramic honeycomb structure, the molding grooves having width of 0.05-0.5 mm, the moldable-material-supplying holes being arranged
8269581 Band-pass filter, high-frequency component, and communication apparatus September 18, 2012
A band-pass filter according to the present invention includes two or more resonant lines arranged side by side in a direction orthogonal to a laminating direction in a laminate substrate formed by laminating plural dielectric layers. Each of the resonant lines has a first coil pattern
8268401 Method for producing ceramic honeycomb structure September 18, 2012
A method for producing a ceramic honeycomb structure comprising applying a coating material to an outer peripheral surface of the ceramic honeycomb body to form an outer peripheral wall, the thickness of the coating material applied being determined from the outer diameter of the cer
8268093 R-Fe-B porous magnet and method for producing the same September 18, 2012
An R--Fe--B based porous magnet according to the present invention has an aggregate structure of Nd.sub.2Fe.sub.14B type crystalline phases with an average grain size of 0.1 .mu.m to 1 .mu.m. At least a portion of the magnet is porous and has micropores with a major axis of 1 .mu.m to 20
8262893 Aluminum plated film, metallic member, and its fabrication method September 11, 2012
A plating film is provided with enough hardness before anodic oxidation, which is hard to be damaged during handling, and also the production method of the plating film. This problem can be solved by an aluminum plating film with aluminum concentration of 98 wt. % or lower, and with a
8253643 Chip antenna and its production method, and antenna apparatus and communications apparatus compr August 28, 2012
A chip antenna comprising a magnetic substrate comprising Z-type ferrite or Y-type ferrite as a main phase and having a through-hole extending linearly along a center axis, and a conductor penetrating the through-hole, the magnetic phase having a c-axis substantially parallel or perp
8251091 Temperature insensitive mass flow controller August 28, 2012
A temperature insensitive mass flow controller comprising a main flow line, a capillary tube coupled to the main flow line across a bypass a thermal sensing element coupled to the capillary tube and a mass flow controller housing adapted to at least cover the capillary tube. A first
8247074 Coated, fine metal particles comprising specific content of carbon and nitrogen, and their produ August 21, 2012
A method for producing coated, fine metal particles comprising the steps of mixing powder comprising TiC and TiN with powder of an oxide of a metal M meeting the relation of .DELTA.G.sub.M-O>.DELTA.G.sub.TiO2, wherein .DELTA.G.sub.M-O represents the standard free energy of formation
8241558 High-Cr, high-Ni, heat-resistant, austenitic cast steel and exhaust equipment members formed the August 14, 2012
A high-Cr, high-Ni, heat-resistant, austenitic cast steel comprises as main components C, Si, Mn, Cr, Ni, W and/or Mo, and Nb, the balance being substantially Fe and inevitable impurities, N being 0.01-0.5%, Al being 0.23% or less, and O being 0.07% or less by weight. Exhaust equipment
8241420 Single crystal material and process for producing the same August 14, 2012
The invention intends to provide a single crystal material that can be used as a dielectric material for use in electronic devices, which has a high Qf value; and a process for producing the same. According to the invention, a single crystal of a composite oxide is obtained from a co
8237529 Low-loss ferrite and electronic device formed by such ferrite August 7, 2012
Low-loss ferrite comprising 100% by mass of main components comprising 47.1-49.3% by mol of Fe.sub.2O.sub.3, 20-26% by mol of ZnO, and 6-14% by mol of CuO, the balance being NiO, and 0.1-2% by mass (as SnO.sub.2) of Sn and 0.05-2% by mass (as Mn.sub.3O.sub.4) of Mn, and having an average
8227702 Multilayer ceramic substrate, electronic component, and method of manufacturing multilayer ceram July 24, 2012
A multilayer ceramic substrate in which an active element and a passive element are surface-equipped over the outermost surface on one side is provided. The multilayer ceramic substrate comprises a plurality of laminated ceramic substrate layers, a surface layer terminal electrode pr
8210999 Roll for use in galvanizing pot July 3, 2012
A roll for use in a galvanizing pot, comprising a hollow body brought into contact with a steel strip, and shaft portions connected to the body, at least the body being made of a silicon nitride ceramic having thermal conductivity of 50 W/(mK) or more at room temperature, and the bod
8210901 Method for producing ceramic-honeycomb-structure-molding die and method for producing ceramic ho July 3, 2012
A method for producing a die for molding a ceramic honeycomb structure, which has molding grooves arranged in a lattice pattern and apertures communicating with the molding grooves for supplying a moldable material, wherein the formation of the lattice-patterned grooves by machining is
8206606 Oxide magnetic material June 26, 2012
An oxide magnetic material includes a ferrite with a hexagonal structure as its main phase. Metallic elements included in the oxide magnetic material are represented by the formula: Ca.sub.1-x-x'La.sub.xSr.sub.x'Fe.sub.2n-yCo.sub.y, where atomic ratios x, x' and y and a molar ratio n
8206516 R--Fe--B rare earth sintered magnet and method for producing same June 26, 2012
In a method for producing an R--Fe--B based rare-earth sintered magnet according to the present invention, first, provided is an R--Fe--B based rare-earth sintered magnet body including, as a main phase, crystal grains of an R.sub.2Fe.sub.14B type compound that includes a light rare-
8196601 Thermal flow sensor with zero drift compensation June 12, 2012
One embodiment of the present invention comprises a thermal flow sensor having a first capillary tube coupled to a mass flow controller main flow line across a mass flow controller bypass. A first pair of sensing elements is coupled to the first capillary tube. The thermal sensor also
8195312 Multi-mode control loop with improved performance for mass flow controller June 5, 2012
One embodiment of the invention comprises a mass flow controller comprising a digital controller, a valve, and a sensor. The digital controller is adapted to implement a control loop having a proportional signal modifier in series with an integral signal modifier. The integral signal
8187392 R-Fe-B type rare earth sintered magnet and process for production of the same May 29, 2012
In an R--Fe--B based rare-earth sintered magnet according to the present invention, at a depth of 20 .mu.m under the surface of its magnet body, crystal grains of an R.sub.2Fe.sub.14B type compound have an (RL.sub.1-xRH.sub.x).sub.2Fe.sub.14B (where 0.2.ltoreq.x.ltoreq.0.75) layer wi
8183956 Diplexer circuit, high-frequency circuit and high-frequency module May 22, 2012
A diplexer circuit comprising a common terminal, a low-frequency-side terminal, a high-frequency-side terminal, a low-frequency-side path comprising a low-frequency filter disposed between the common terminal and the low-frequency-side terminal, and a high-frequency-side path compris
8182620 Nano-crystalline, magnetic alloy, its production method, alloy ribbon and magnetic part May 22, 2012
A magnetic alloy having a composition represented by the general formula of Fe.sub.100-x-yCu.sub.xB.sub.y(atomic %), wherein x and y are numbers meeting the conditions of 0.1.ltoreq.x.ltoreq.3, and 10.ltoreq.y.ltoreq.20, or the general formula of Fe.sub.100-x-y-zCu.sub.xB.sub.yX.sub.
8182619 R-F e-B rare-earth sintered magnet and process for producing the same May 22, 2012
First, an R--Fe--B based rare-earth sintered magnet body including, as a main phase, crystal grains of an R.sub.2Fe.sub.14B type compound that includes a light rare-earth element RL, which is at least one of Nd and Pr, as a major rare-earth element R is provided. Next, an M layer, in
8182618 Rare earth sintered magnet and method for producing same May 22, 2012
A sintered rare-earth magnet includes an Nd.sub.2Fe.sub.14B type crystalline phase as its main phase and Al as an additive. The magnet includes at least one light rare-earth element LR selected from the group consisting of yttrium and the rare-earth elements other than Dy, Ho and Tb,
8178019 Method and apparatus for producing ceramic honeycomb structure May 15, 2012
A method for producing a ceramic honeycomb structure comprising the steps of machining end surfaces of an unsintered or sintered ceramic honeycomb structure, and ejecting a gas from a slit-like orifice moving relative to an opposing end surface without contact, thereby removing dust and/
8177923 Nano-crystalline, magnetic alloy, its production method, alloy ribbon and magnetic part May 15, 2012
A magnetic alloy having a composition represented by the general formula of Fe.sub.100-x-yCu.sub.xB.sub.y (atomic %), wherein x and y are numbers meeting the conditions of 0.1.ltoreq.x.ltoreq.3, and 10.ltoreq.y.ltoreq.20, or the general formula of Fe.sub.100-x-y-zCu.sub.xB.sub.yX.sub
8177922 R-Fe-B anisotropic sintered magnet May 15, 2012
An R--Fe--B based anisotropic sintered magnet according to the present invention has, as a main phase, an R.sub.2Fe.sub.14B type compound that includes a light rare-earth element RL (which is at least one of Nd and Pr) as a major rare-earth element R, and also has a heavy rare-earth
8177921 R-Fe-B rare earth sintered magnet May 15, 2012
An R--Fe--B based rare-earth sintered magnet according to the present invention includes, as a main phase, crystal grains of an R.sub.2Fe.sub.14B type compound that includes Nd, which is a light rare-earth element, as a major rare-earth element R. The magnet includes a heavy rare-ear
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