Patents by Inventor Yasuto Nozawa
Yasuto Nozawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9627676Abstract: The present invention relates to a lithium ion battery employed by connecting the positive electrode side to a negative electrode portion made of Cu or a Cu alloy by a bus bar made of Al or an Al alloy and provides a negative electrode terminal for a lithium ion battery capable of providing sufficient bonding strength between the negative electrode portion and the bus bar when the negative electrode portion and the bus bar are metallurgically bonded to each other by resistance welding or the like, for example. This negative electrode terminal for a lithium ion battery is made of a clad material having a first metal layer made of Al or an Al alloy and a second metal layer made of Cu or a Cu alloy bonded to each other through a reaction-suppressing layer suppressing a reaction therebetween.Type: GrantFiled: September 13, 2013Date of Patent: April 18, 2017Assignee: HITACHI METALS, LTD.Inventors: Yoshimitsu Oda, Masaaki Ishio, Yasuto Nozawa
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Publication number: 20140011074Abstract: The present invention relates to a lithium ion battery employed by connecting the positive electrode side to a negative electrode portion made of Cu or a Cu alloy by a bus bar made of Al or an Al alloy and provides a negative electrode terminal for a lithium ion battery capable of providing sufficient bonding strength between the negative electrode portion and the bus bar when the negative electrode portion and the bus bar are metallurgically bonded to each other by resistance welding or the like, for example. This negative electrode terminal for a lithium ion battery is made of a clad material having a first metal layer made of Al or an Al alloy and a second metal layer made of Cu or a Cu alloy bonded to each other through a reaction-suppressing layer suppressing a reaction therebetween.Type: ApplicationFiled: September 13, 2013Publication date: January 9, 2014Applicants: HITACHI METALS, LTD., NEOMAX MATERIALS CO., LTD.Inventors: Yoshimitsu Oda, Masaaki Ishio, Yasuto Nozawa
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Patent number: 5096509Abstract: 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, TM represents Fe which may be partially substituted by Co, B boron, Ga gallium, and M one or more elements selected from the group consisting of Nb, W, V, Ta, Mo, Si, Al, Zr, Hf, P, C and Zn. This is useful for anisotropic resin-bonded magnet with high magnetic properties.Type: GrantFiled: December 13, 1988Date of Patent: March 17, 1992Assignee: 501 Hitachi Metals, Ltd.Inventors: Minoru Endoh, Yasuto Nozawa, Katsunori Iwasaki, Shigeho Tanigawa, Masaaki Tokunaga
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Patent number: 5085715Abstract: A process for producing magnetically anisotropic powder having "flattened" crystal grains of an R-TM-B-M system alloy with preferably (c)/(a) greater than 2, where (c) is the grain size perpendicular to the C-axis and (a) the grain size parallel to the C-axis, includes the steps of plastically deforming a green compact of flakes formed by rapidly-quenching the alloy melt, and then crushing the plastically deformed body. In the alloy system, R is at least one of the rare earth elements including Y, TM is Fe or Fe a part of which has been substituted with Co, B is boron, and M is an additive selected from Si, Al, Nb, Zr, P and C.Type: GrantFiled: December 4, 1989Date of Patent: February 4, 1992Assignee: Hitachi Metals, Ltd.Inventors: Masatoki Tokunaga, Yasuto Nozawa, Katsunori Iwasaki
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Patent number: 5039292Abstract: Disclosed is a device for manufacturing Nd-Fe-B alloy magnet materials, and in particular, for manufacturing an integral, columnar-ring-shaped Nd-Fe-B magnet which is multi-pole-magnetized along the circumference thereof and which is used as the rotor magnet of a high-efficiency stepping motor. The device of this invention is composed of a die punch, an upper and a lower punch having two concentric sections. The space is defined by the die and the upper and lower punches includes induction means for heating the green compact or the densified compact and sealing means for keeping the die under a reduced pressure condition or in an inert gas atmosphere.Type: GrantFiled: July 19, 1990Date of Patent: August 13, 1991Assignee: Hitachi Metals, Ltd.Inventors: Shigeho Tanigawa, Katsunori Iwasaki, Yasuto Nozawa
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Patent number: 4985086Abstract: A method of producing a magnetically anisotropic Nd-Fe-B magnet material comprising the steps of: charging a green body produced by pressing a flaky or powdery material consisting of an amorphous alloy and/or a finely crystallized alloy, into a cavity defined by a die having a hole extending therethrough, a lower plunger inserted into said hole, and an upper plunger having a larger diameter than that of said hole; pressing said green body by elevating said lower plunger while keeping a temperature thereof (pressing temperature) at 600.degree.-850.degree.; elevating the resulting pressed body by elevating said lower plunger while heating; and upsetting said pressed body while keeping a temperature thereof (upsetting temperature) at 600.degree.-850.degree. C. to provide it with magnetic anisotropy.Type: GrantFiled: June 2, 1989Date of Patent: January 15, 1991Assignee: Hitachi Metals, Ltd.Inventors: Katsunori Iwasaki, Yasuto Nozawa, Shigeho Tanigawa
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Patent number: 4983232Abstract: 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, TM represents Fe which may be partially substituted by Co, B boron, Ga gallium, and M one or more elements selected from the group consisting of Nb, W, V, Ta, Mo, Si, Al, Zr, Hf, P, C and Zn. This is useful for anisotropic resin-bonded magnet with high magnetic properties.Type: GrantFiled: October 27, 1987Date of Patent: January 8, 1991Assignee: Hitachi Metals, Ltd.Inventors: Minoru Endoh, Yasuto Nozawa, Katsunori Iwasaki, Shigeho Tanigawa, Masaaki Tokunaga
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Patent number: 4960474Abstract: In a magnetically anisotropic magnet for use in a motor, comprising at least one rare earth element (R), Fe and boron (B), said magnet having fine crystal grains, the improvement comprising Ga added in the magnet so that the magnet has a surface magnification of not less than 6, a residual magnetic flux density in the direction of easy magnetization of not less than 11 kG and a coercive force of not less than 12 kOe.The invention also provide a method of producing the magnetically anisotropic magnet for use in a motor, comprising the steps of: forming flakes by rapid quenching a molten alloy consisting of at least one rare earth element (R), Fe, boron (B) and an optical metal element (M); compacting the flakes to provide a green compact; and warm plastic working the green compact at a temperature between 600.degree. C. and 800.degree. C. at a strain rate of 0.0001 to 0.1 per second with a plastic working ratio (ho/h) of not less than 2.Type: GrantFiled: September 8, 1988Date of Patent: October 2, 1990Assignee: Hitachi Metals, Ltd.Inventors: Yasuto Nozawa, Shigeho Tanigawa, Katsunori Iwasaki
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Patent number: 4960469Abstract: Disclosed are a method of and a device for manufacturing Nd-Fe-B alloy magnet materials, and in particular, for manufacturing an integral, columnar-ring-shaped Nd-Fe-B magnet which is multi-pole-magnetized along the circumference thereof and which is used as the rotor magnet of a high-efficiency stepping motor. According to the method, a green compact or a densified compact is first prepared from a selected flake or a powder material composed of amorphous and/or fine-crystallized particles obtained through rapid quenching of the molten alloy. It is then provided with magnetic anisotropy through plastic deformation effected radially inwardly along substantially the entire periphery of the compact initially deformed to receive a mandrel-core, and maintained at a temperature of 600 to 850 degrees C. Subsequently, the deformed body is magnetized with the desired radial or polar magnetization pattern.Type: GrantFiled: November 23, 1988Date of Patent: October 2, 1990Assignee: Hitachi Metals, Ltd.Inventors: Shigeho Tanigawa, Katsunori Iwasaki, Yasuto Nozawa
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Patent number: 4952239Abstract: Magnetically anisotropic powder and resin-bonded magnets made therefrom have "flattened" crystal grains of an R-TM-B-M system alloy with preferably (c)/(a) greater than 2, where (c) is the grain size perpendicular to the C-axis and (a) the grain size parallel to the C-axis. The "flattened" grains are produced by plastically deforming a green compact of flakes formed by rapidly-quenching an alloy melt, and then crushing the plastically deformed body. In the alloy system, R is at least one of the rare earth elements including Y, TM is Fe or Fe a part of which has been substituted with Co, B is boron, and M is an additive selected from Si, Al, Nb, Zr, P and C.Type: GrantFiled: June 14, 1989Date of Patent: August 28, 1990Assignee: Hitachi Metals, Ltd.Inventors: Masatoki Tokunaga, Yasuto Nozawa, Katsunori Iwasaki
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Patent number: 4921553Abstract: Magnetically anisotripic powder and resin-bonded magnets made therefrom have "flattened" crystal grains of an R-TM-B-M system alloy with preferably (c)/(a) greater than 2, where (c) is the grain size perpendicular to the C-axis and (a) the grain size parallel to the C-axis. The "flattened" grains are produced by plastically deforming a green compact of flakes formed by rapidly-quenching an alloy melt, and then crushing the plastically deformed body. In the allow system, R is at least one of the rare earth elements including Y, TM is Fe or Fe a part of which has been substituted with Co, B is boron, and M is an additive selected from Si, Al, Nb, Zr, P and C.Type: GrantFiled: March 17, 1987Date of Patent: May 1, 1990Assignee: Hitachi Metals, Ltd.Inventors: Masatoki Tokunga, Yasuto Nozawa, Katsunori Iwasaki
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Patent number: RE38042Abstract: A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 &mgr;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 &mgr;m, wherein R represents one or more rare earth elements including Y, TM represents Fe which may be partially substituted by Co, B boron, Ga gallium, and M one or more elements selected from the group consisting of Nb, W, V, Ta, Mo, Si, Al, Zr, Hf, P, C and Zn. This is useful for anisotropic resin-bonded magnet with high magnetic properties.Type: GrantFiled: November 2, 2001Date of Patent: March 25, 2003Assignee: Hitachi Metals, Ltd.Inventors: Minoru Endoh, Yasuto Nozawa, Katsunori Iwasaki, Shigeho Tanigawa, Masaaki Tokunaga