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公开(公告)号：US11015101B2
公开(公告)日：2021-05-25
申请号：US16545318
申请日：2019-08-20
发明人： Katsuhiko Yamada , Keiichi Fuse
摘要： A rare earth regenerator material particle and a regenerator material particle group having a high long-term reliability, and a superconducting magnet, an examination apparatus, a cryopump and the like using the same are provided. A rare earth regenerator material particle contains a rare earth element as a constituent component, and in the particle, a peak indicating a carbon component is detected in a surface region by an X-ray photoelectron spectroscopy analysis.
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公开(公告)号：US10385248B2
公开(公告)日：2019-08-20
申请号：US16027928
申请日：2018-07-05
发明人： Katsuhiko Yamada , Keiichi Fuse
IPC分类号： G01R33/035 , C09K5/08 , F25B9/14 , B22F9/10 , C09K5/14 , B22F9/08 , H01F1/01 , G01R33/38 , G01R33/3815 , B23P15/26 , C09K5/04
摘要： Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.
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公开(公告)号：US10155668B2
公开(公告)日：2018-12-18
申请号：US15509334
申请日：2015-09-04
发明人： Katsuhiko Yamada , Keiichi Fuse
摘要： The present invention provides a rare earth cold accumulating material particle comprising a rare earth oxide or a rare earth oxysulfide, wherein the rare earth cold accumulating material particle is composed of a sintered body; an average crystal grain size of the sintered body is 0.5 to 5 μm; a porosity of the sintered body is 10 to 50 vol. %; and an average pore size of the sintered body is 0.3 to 3 μm. Further, it is preferable that the porosity of the rare earth cold accumulating material particle is 20 to 45 vol. %, and a maximum pore size of the rare earth cold accumulating material particle is 4 μm or less. Due to this structure, there can be provided a rare earth cold accumulating material having a high refrigerating capacity and a high strength.
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公开(公告)号：US09719004B2
公开(公告)日：2017-08-01
申请号：US15196692
申请日：2016-06-29
发明人： Katsuhiko Yamada , Keiichi Fuse
CPC分类号： C09K5/08 , B22F9/08 , B22F9/10 , B23P15/26 , C09K5/041 , C09K5/14 , C22C2202/02 , F25B9/14 , F25B9/145 , F25B2309/003 , F25B2309/1415 , G01R33/3804 , G01R33/3815 , H01F1/015 , Y10T428/12014
摘要： Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.
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公开(公告)号：US09466882B2
公开(公告)日：2016-10-11
申请号：US14449578
申请日：2014-08-01
发明人： Katsuhiko Yamada , Tadao Saito
CPC分类号： H01Q7/08 , C22C32/0094 , C22C2202/02 , H01F1/15316 , H01F3/04 , H01F10/265 , H01F27/25 , H01Q1/3241 , H01Q7/06
摘要： An antenna magnetic core of an embodiment has a laminate of a Co-based amorphous magnetic alloy thin strip and a resin layer part having an average thickness in a range of from 1 to 10 μm. Dispersion of thicknesses of the resin layer part is within ±40% in relation to the average thickness.
摘要翻译： 一个实施例的天线磁芯具有Co基非晶磁合金薄带和平均厚度在1至10μm范围内的树脂层部分的层压体。 树脂层部分的厚度的分散相对于平均厚度在±40％以内。
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公开(公告)号：US11136244B2
公开(公告)日：2021-10-05
申请号：US16182908
申请日：2018-11-07
发明人： Katsuhiko Yamada , Keiichi Fuse
IPC分类号： C01F17/00 , C01F17/294 , C09K5/14 , F04B37/08 , F25B9/00 , C01F17/34 , C01F17/206 , F25B29/00 , F25D29/00 , H01F6/00
摘要： The present invention provides a rare earth cold accumulating material particle comprising a rare earth oxide or a rare earth oxysulfide, wherein the rare earth cold accumulating material particle is composed of a sintered body; an average crystal grain size of the sintered body is 0.5 to 5 μm; a porosity of the sintered body is 10 to 50 vol. %; and an average pore size of the sintered body is 0.3 to 3 μm. Further, it is preferable that the porosity of the rare earth cold accumulating material particle is 20 to 45 vol. %, and a maximum pore size of the rare earth cold accumulating material particle is 4 μm or less. Due to this structure, there can be provided a rare earth cold accumulating material having a high refrigerating capacity and a high strength.
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公开(公告)号：US10024583B2
公开(公告)日：2018-07-17
申请号：US15636016
申请日：2017-06-28
发明人： Katsuhiko Yamada , Keiichi Fuse
IPC分类号： G01R33/035 , F25B9/14 , B23P15/26 , G01R33/38 , G01R33/3815 , B22F9/10 , C09K5/14 , C09K5/04
CPC分类号： C09K5/08 , B22F9/08 , B22F9/10 , B23P15/26 , C09K5/041 , C09K5/14 , C22C2202/02 , F25B9/14 , F25B9/145 , F25B2309/003 , F25B2309/1415 , G01R33/3804 , G01R33/3815 , H01F1/015 , Y10T428/12014
摘要： Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.
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公开(公告)号：US11530846B2
公开(公告)日：2022-12-20
申请号：US16928483
申请日：2020-07-14
发明人： Katsuhiko Yamada , Keiichi Fuse
摘要： A reduction in a permeability of refrigerant gas is suppressed while increasing a filling factor of regenerator material particles with respect to a stage of a cold head. A cold head includes a stage including regenerator material particle groups, and a metal mesh material partitioning the regenerator material particle groups. The metal mesh material has quadrangular mesh holes each having a length of a long side of 1/10 or more and ½ or less of each of average particle sizes of the regenerator material particle groups.
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公开(公告)号：US11417449B2
公开(公告)日：2022-08-16
申请号：US16139803
申请日：2018-09-24
发明人： Takao Sawa , Katsuhiko Yamada , Tadao Saito
摘要： A magnetic sheet 1 of an embodiment includes a stack of a plurality of magnetic thin strips and resin film parts. The stack includes from 5 to 25 pieces of the magnetic thin strips. The magnetic thin strips are provided with cutout portions each having a width of 1 mm or less (including 0 (zero)). A ratio (B/A) of a total length B of the cutout portions provided to the magnetic thin strip to a total outer peripheral length A of an outer peripheral area of the magnetic thin strip arranged on one of the resin film parts is in a range of from 2 to 25.
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10.发明申请公开(公告)号：US20150219366A1
公开(公告)日：2015-08-06
申请号：US14688475
申请日：2015-04-16
发明人： Katsuhiko Yamada , Keiichi Fuse
摘要： A reduction in a permeability of refrigerant gas is suppressed while increasing a filling factor of regenerator material particles with respect to a stage of a cold head. A cold head includes a stage including regenerator material particle groups, and a metal mesh material partitioning the regenerator material particle groups. The metal mesh material has quadrangular mesh holes each having a length of a long side of 1/10 or more and ½ or less of each of average particle sizes of the regenerator material particle groups.
摘要翻译： 抑制冷却气体的渗透性的降低，同时增加再生材料颗粒相对于冷头的阶段的填充系数。 冷头包括包括再生器材料颗粒组的平台和分隔再生材料颗粒组的金属网材料。 金属网材料具有四边形网眼孔，每个网孔具有长边的长度为再生材料颗粒组的平均粒度的1/10以上且1/2以下。
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