公开(公告)号：USRE40348E1

公开(公告)日：2008-06-03

申请号：US10701020

申请日：2003-11-05

申请人： Hisato Tokoro ,  Kimio Uchida ,  Kazuo Oda ,  Tsukasa Mikamoto

发明人： Hisato Tokoro ,  Kimio Uchida ,  Kazuo Oda ,  Tsukasa Mikamoto

IPC分类号： B22F3/00

摘要： A thin arc segment magnet made of a an R-T-B based, rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially Fe T, wherein R is at least one rare earth element including Y, and T is Fe or Fe and Co, which has an oxygen content of 0.3 weight % or less, a density of 7.56 g/cm3 or more, a coercivity iHc of 1.1 MA/m (14 kOe) or more at room temperature, and an orientation Br/4πImax of 96% or more in an anisotropy-providing direction at room temperature can be produced by using a slurry mixture formed by introducing fine alloy powder of the above composition into a mixture liquid comprising 99.7-99.99 parts by weight of a mineral oil, a synthetic oil or a vegetable oil and 0.01-0.3 parts by weight of a nonionic surfactant and/or an anionic surfactant.

摘要翻译： 一个由<？delete-start id =“DEL-S-00001”date =“20080603”？> a <？delete-end id =“DEL-S-00001”？> <？insert-start id =“INS-S-00001”date =“20080603”？>基于RTB的<？insert-end id =“INS-S-00001”→稀土烧结磁体，其基本上包含28-33重量％的R和 B的0.8-1.5重量％，余额基本上<？delete-start id =“DEL-S-00002”date =“20080603”？Fe <？delete-end id =“DEL-S-00002”？> <？insert-start id =“INS-S-00002”date =“20080603”？> T <？insert-end id =“INS-S-00002”？>其中，R是至少一个稀土元素，包括Y ，T为Fe，Fe，Co，氧含量为0.3重量％以下，密度为7.56g / cm 3以上，矫顽力iHc为1.1MA / m（14 kOe）以上，并且室温下各向异性提供方向的取向Br / 4piI最大值为96％以上，可以通过使用通过引入细合金粉末形成的浆料混合物 的上述组合物混合成混合物 包含99.7-99.99重量份矿物油，合成油或植物油和0.01-0.3重量份非离子表面活性剂和/或阴离子表面活性剂的液体。

公开(公告)号：US06312494B1

公开(公告)日：2001-11-06

申请号：US09610476

申请日：2000-07-05

申请人： Hisato Tokoro ,  Kimio Uchida ,  Kazuo Oda ,  Tsukasa Mikamoto

发明人： Hisato Tokoro ,  Kimio Uchida ,  Kazuo Oda ,  Tsukasa Mikamoto

IPC分类号： B22F300

CPC分类号： H01F41/0273 ,  H01F1/0577

摘要： A thin arc segment magnet made of a rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially Fe, wherein R is at least one rare earth element including Y, and T is Fe or Fe and Co, which has an oxygen content of 0.3 weight % or less, a density of 7.56 g/cm3 or more, a coercivity iHc of 1.1 MA/m (14 kOe) or more at room temperature, and an orientation Br/4&pgr;Imax of 96% or more in an anisotropy-providing direction at room temperature can be produced by using a slurry mixture formed by introducing fine alloy powder of the above composition into a mixture liquid comprising 99.7-99.99 parts by weight of a mineral oil, a synthetic oil or a vegetable oil and 0.01-0.3 parts by weight of a nonionic surfactant and/or an anionic surfactant.

摘要翻译： 一种由稀土烧结磁体制成的薄弧形磁体，其基本上包含28-33重量％的R和0.8-1.5重量％的B，余量基本上为Fe，其中R是至少一种包括Y的稀土元素，T 是Fe或Fe和Co，其氧含量为0.3重量％以下，密度为7.56g / cm 3以上，室温下的矫顽力iHc为1.1MA / m（14kOe）以上，取向性 室温各向异性提供方向的Br / 4piImax为96％以上可以通过使用通过将上述组成的微细合金粉末引入到包含99.7-99.99重量份的矿物油 ，合成油或植物油，0.01-0.3重量份非离子表面活性剂和/或阴离子表面活性剂。

公开(公告)号：US06635120B2

公开(公告)日：2003-10-21

申请号：US09951480

申请日：2001-09-14

申请人： Hisato Tokoro ,  Kimio Uchida

发明人： Hisato Tokoro ,  Kimio Uchida

IPC分类号： H01F1053

CPC分类号： H01F1/0577 ,  B22F3/22 ,  C22C1/0441

摘要： A sintered rare earth magnet is produced by finely pulverizing a coarse rare earth magnet alloy powder to an average particle size of 1-10 &mgr;m in a non-oxidizing atmosphere; introducing the resultant fine rare earth magnet alloy powder into a non-oxidizing liquid comprising at least one oil selected from the group consisting of mineral oils, synthetic oils and vegetable oils, and at least one lubricant selected from the group consisting of esters of aliphatic acids and monovalent alcohols, esters of polybasic acids and monovalent alcohols, esters of aliphatic acids and polyvalent alcohols and their derivatives to prepare a slurry; molding the slurry; degreasing the resultant green body; sintering the degreased green body; and then heat-treating the green body.

公开(公告)号：US06867583B2

公开(公告)日：2005-03-15

申请号：US10292593

申请日：2002-11-13

申请人： Akitoshi Mizutani ,  Kenji Takeda ,  Masao Tokunaga ,  Tsutomu Nakamura ,  Keiichi Yasuda ,  Kimio Uchida ,  Hiroshi Takeyama ,  Tetsuo Hariu

发明人： Akitoshi Mizutani ,  Kenji Takeda ,  Masao Tokunaga ,  Tsutomu Nakamura ,  Keiichi Yasuda ,  Kimio Uchida ,  Hiroshi Takeyama ,  Tetsuo Hariu

IPC分类号： G01B7/00 ,  G01D5/14 ,  G01D11/24 ,  G01B7/14

CPC分类号： G01D5/145 ,  G01D11/245

摘要： A displacement sensor precisely detects displacement of a moving body in a rectilinear movement direction even if the moving body rotates. The sensor includes a detector and a magnet. The cross sectional area of the permanent magnet in a plane perpendicular to an axis, which extends in the rectilinear movement direction, varies in the direction of movement. The permanent magnet is magnetized in the rectilinear movement direction. The detector is located so that magnetic flux passes through a detection face of the detector substantially perpendicularly.

摘要翻译： 即使移动体旋转，位移传感器精确地检测移动体在直线运动方向上的位移。 传感器包括检测器和磁铁。 在与直线运动方向上延伸的轴线垂直的平面中的永磁体的横截面面积在运动方向上变化。 永磁体在直线运动方向被磁化。 检测器位于使得磁通量基本垂直地穿过检测器的检测面。

公开(公告)号：US06468365B1

公开(公告)日：2002-10-22

申请号：US09417544

申请日：1999-10-14

申请人： Kimio Uchida ,  Tsunehiro Kawata

发明人： Kimio Uchida ,  Tsunehiro Kawata

IPC分类号： H01F1053

CPC分类号： H01F1/0577 ,  H01F41/0293

摘要： An R—T—B sintered permanent magnet having a composition including 28-33 weight % of R, and 0.5-2 weight % of B, the balance being substantially T and inevitable impurities, wherein R is at least one rare earth element including Y, at least one heavy rare earth element selected from the group consisting of Dy, Tb and Ho being indispensable, and T is Fe or Fe and Co, the permanent magnet having a crystal structure comprising first R2T14B-type, main-phase crystal grain particles having a higher heavy rare earth element concentration than that of a crystal grain boundary phase, and second R2T14B-type, main-phase crystal grain particles having a lower heavy rare earth element concentration than that of the crystal grain boundary phase.

摘要翻译： 一种具有28-33重量％R和0.5-2重量％B的组成的RTB烧结永磁体，余量基本上为T和不可避免的杂质，其中R为至少一种包括Y的稀土元素，至少一种 选自Dy，Tb和Ho的重稀土元素是必不可少的，T是Fe或Fe和Co，永磁体具有包括第一R2T14B型的晶体结构，具有较高重量的主相晶粒 稀土元素浓度高于晶界相，而第二种R2T14B型主相晶粒比重晶态晶界相重的稀土元素浓度较低。

公开(公告)号：US08001870B2

公开(公告)日：2011-08-23

申请号：US11052881

申请日：2005-02-09

申请人： Takehiro Saito ,  Kimio Uchida ,  Haruhiko Suzuki ,  Masahiro Makino ,  Shigeru Hasegawa ,  Hiroshi Takeyama

发明人： Takehiro Saito ,  Kimio Uchida ,  Haruhiko Suzuki ,  Masahiro Makino ,  Shigeru Hasegawa ,  Hiroshi Takeyama

IPC分类号： G05G1/30

CPC分类号： G05G1/30 ,  G05G1/38 ,  Y10T74/20528 ,  Y10T74/20534 ,  Y10T74/2054

摘要： An accelerator capable of detecting a turning angle of an accelerator pedal with high accuracy includes a bearing part, an urging part, an accelerator pedal, a stopper, and a turning angle sensor. The accelerator pedal has a turning shaft supported by the bearing part and is turned forward when a depressing force is applied thereto and is turned reversely when the urging force of the urging part is applied thereto. The stopper abuts against the accelerator pedal to limit the reverse turn of the accelerator pedal and substantially simultaneously guides the accelerator pedal in a direction equivalent to that which the urging force is applied. The turning angle sensor detects the turning angle of the accelerator pedal.

摘要翻译： 能够高精度地检测加速踏板的转向角度的加速器包括轴承部，推压部，加速踏板，止动件和转向角传感器。 加速器踏板具有由轴承部支承的转动轴，当向其施加按压力时向前转动，并且当施力部分的作用力向其施加时，该踏板反转。 止挡件抵靠加速器踏板以限制加速器踏板的反向转动，并且基本上同时沿加载踏板等同于施加作用力的方向引导加速器踏板。 转向角传感器检测加速踏板的转动角度。

公开(公告)号：US05997804A

公开(公告)日：1999-12-07

申请号：US859911

申请日：1997-05-21

申请人： Kimio Uchida ,  Masahiro Takahashi ,  Fumitake Taniguchi

发明人： Kimio Uchida ,  Masahiro Takahashi ,  Fumitake Taniguchi

IPC分类号： B22F9/04 ,  C22C1/04 ,  H01F1/057 ,  B22F7/00

CPC分类号： C22C1/0441 ,  B22F9/04 ,  H01F1/0577 ,  B22F2009/041 ,  B22F2998/10 ,  B22F2999/00

摘要： A rare earth permanent magnet consisting essentially, by weight, of 27.0-31.0% of at least one rare earth element including Y, 0.5-2.0% of B, 0.02-0.15% of N, 0.25% or less of O, 0.15% or less of C, at least one optional element selected from the group consisting of 0.1-2.0% of Nb, 0.02-2.0% of Al, 0.3-5.0% of Co, 0.01-0.5% of Ga and 0.01-1.0% of Cu, and a balance of Fe, and a production method thereof. The contents of rare earth element, oxygen, carbon and oxygen in the magnet are regulated within the specific ranges.

公开(公告)号：US20090033315A1

公开(公告)日：2009-02-05

申请号：US12181783

申请日：2008-07-29

申请人： Takashi Kawashima ,  Kimio Uchida ,  Yukinobu Kajita ,  Tatsuya Kitanaka ,  Koichiro Matsumoto ,  Yoshiyuki Kono ,  Hisataka Okado ,  Hiroyuki Shintani

发明人： Takashi Kawashima ,  Kimio Uchida ,  Yukinobu Kajita ,  Tatsuya Kitanaka ,  Koichiro Matsumoto ,  Yoshiyuki Kono ,  Hisataka Okado ,  Hiroyuki Shintani

IPC分类号： G01B7/00

CPC分类号： G01D5/145

摘要： A position sensor includes a longitudinally extending permanent magnet member at least two longitudinally extending arc-shaped projecting elements respectively projecting from the opposite ends toward the inside space to confront each other at a distance and a pair of compatible main magnetic sensors disposed in the inside space along the longitudinal axis at an interval so as to generate a pair of output signals when the permanent magnet member shifts along the longitudinal axis. The opposite ends of the permanent magnet member are configured to surround a common inside space and polarized to have opposite magnetic poles so as to provide in the inside space a magnetic field whose magnetic flux density becomes a maximum at a longitudinal center of the inside space and gradually becomes smaller as a position of the inside space shifts from the longitudinal center along a longitudinal axis of the permanent magnet members. The arc-shaped projecting elements are arranged so that the magnetic flux density and each of the output signals can be expressed by a cosine of a shift value from the longitudinal center, and the interval is ¼ of the cycle of the cosine.

摘要翻译： 位置传感器包括纵向延伸的永磁体构件，其至少两个纵向延伸的弧形突起元件，其分别从相对端向内部空间突出以相隔一定距离，并且一对相容的主磁传感器设置在内部空间 沿着纵轴以一定的间隔，以便当永磁体部件沿着纵向轴线移动时产生一对输出信号。 永久磁铁构件的相对端构成为包围共同的内部空间并且被极化以具有相反的磁极，以便在内部空间中提供在内部空间的纵向中心处的磁通密度变为最大的磁场，以及 随着内部空间的位置沿纵向中心沿永久磁铁构件的纵向轴线偏移，逐渐变小。 弧形突出元件被布置成使得磁通密度和每个输出信号可以由来自纵向中心的偏移值的余弦来表示，并且间隔是余弦周期的1/4。

公开(公告)号：US6159308A

公开(公告)日：2000-12-12

申请号：US209426

申请日：1998-12-11

申请人： Kimio Uchida ,  Masahiro Takahashi

发明人： Kimio Uchida ,  Masahiro Takahashi

IPC分类号： H01F1/057 ,  H01F1/00

CPC分类号： H01F1/0577

摘要： A method of producing an R--Fe--B-based, sintered permanent magnet, wherein R is at least one rare earth element including Y, having a small oxygen content. A coarse alloy powder prepared by a reductive diffusion method is milled and recovered into a solvent to form a slurry. The slurry is wet-compacted to form a green body which is then sintered after removing the solvent. The milling, recovering, wet-compacting, solvent-removing and sintering steps are carried out while preventing the powder, slurry and green body from being brought into contact with air to minimize the oxygen content in the final sintered permanent magnet. The sintered permanent magnet produced has a high density and a high magnetic properties due to a low oxygen content.

摘要翻译： 一种R-Fe-B系烧结永磁体的制造方法，其中，R为至少一种含有氧的少量含有Y的稀土元素。 通过还原扩散法制备的粗合金粉末被研磨并回收到溶剂中以形成浆料。 将浆料湿式压实以形成生坯，然后在除去溶剂之后烧结。 进行研磨，回收，湿式压实，溶剂去除和烧结步骤，同时防止粉末，浆料和生坯与空气接触，以最小化最终烧结永磁体中的氧含量。 所生产的烧结永磁体由于氧含量低而具有高密度和高磁性能。

公开(公告)号：US4837109A

公开(公告)日：1989-06-06

申请号：US71937

申请日：1987-07-10

申请人： Masaaki Tokunaga ,  Kimio Uchida ,  Akitoshi Hiraki

发明人： Masaaki Tokunaga ,  Kimio Uchida ,  Akitoshi Hiraki

IPC分类号： H01F7/00 ,  C22C1/00 ,  H01F1/00 ,  H01F1/057

CPC分类号： C22C1/00 ,  H01F1/0573

摘要： A method of producing a neodymium-iron-boron permanent magnet alloy having a composition of 25.0-50.0 weight % of neodymium, 0.3-5.0 weight % of boron and balance substantially iron, including the steps of adding metal calcium, calcium hydride or a mixture thereof as a reducing agent to neodymium fluoride, iron and boron (or ferroboron), and further adding thereto at least one of calcium chloride, sodium chloride and potassium chloride as a flux, melting the resulting mixture in an inert gas atmosphere, or in a reducing gas atmosphere or substantially in vacuum at 1,000.degree.-1,300.degree. C., thereby reducing said neodymium fluoride to provide said alloy with as small a calcium content as 0.1 weight % or less. The starting materials may contain dysprosium fluoride and niobium to provide Nd-Dy-Fe-B-Nb alloys containing 0.5-15.0 weight % Dy and 0.05-5.0 weight % Nb. This method makes it possible to produce Nd-Fe-B or Nd-Dy-Fe-B-Nb permanent magnet alloys with as small a calcium content as 0.1 weight % or less directly from starting materials. Accordingly, it is economically advantageous over the conventional reduction method which produces mother alloys.

摘要翻译： 一种制备钕 - 铁 - 硼永久磁铁合金的方法，该合金具有25.0-50.0重量％钕，0.3-5.0重量％硼和余量基本上为铁的组成，包括以下步骤：加入金属钙，氢化钙或混合物 作为氟化钕，铁和硼（或铁硼）的还原剂，并进一步向其中加入氯化钙，氯化钠和氯化钾中的至少一种作为助熔剂，将所得混合物在惰性气体气氛中或在 减少气氛或基本上在1000°-1.300℃的真空中，从而减少所述氟化钕，以提供具有小于0.1重量％或更少的钙含量的所述合金。 起始材料可以含有氟化镝和铌，以提供含有0.5-15.0重量％Dy和0.05-5.0重量％Nb的Nd-Dy-Fe-B-Nb合金。 该方法可以直接从起始材料制造具有小于0.1重量％或更少的钙含量的Nd-Fe-B或Nd-Dy-Fe-B-Nb永磁体合金。 因此，与生产母合金的常规还原方法相比，在经济上是有利的。