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    ProducingSi.sub.3 N.sub.4 composite by sheeting a mixture of Si.sub.3 N.sub .
    1.
    发明授权
    ProducingSi.sub.3 N.sub.4 composite by sheeting a mixture of Si.sub.3 N.sub . 失效
    生产SI3N4粉末和涂层SIC砂轮的混合物，用于制备绿色板材，面向和层压绿色板材，并烧结层压板

    公开(公告)号：US5141579A

    公开(公告)日：1992-08-25

    申请号：US648762

    申请日：1991-01-31

    申请人： Tatsuji Matsui ,  Osamu Komura ,  Masaya Miyake

    发明人： Tatsuji Matsui ,  Osamu Komura ,  Masaya Miyake

    IPC分类号： C04B35/593 ,  C04B35/80 ,  C30B33/00

    CPC分类号： C04B35/806 ,  C04B35/593 ,  C30B29/36 ,  C30B33/00

    摘要： An SiC whisker-reinforced Si.sub.3 N.sub.4 composite material comprising a sintered body of an Si.sub.3 N.sub.4 matrix having dispersed therein SiC whiskers, wherein said SiC whiskers are uniaxially orientated; a process for producing an SiC whisker-reinforced Si.sub.3 N.sub.4 composite material which comprises mixing (1) SiC whiskers having a coating comprising an oxide of at least one metallic element selected from the group consisting of Be, Mg, Ca, Sr, and Ba of the group 2A; Sc, Y, and La of the group 3A; Ti, Zr, and Hf of the group 4A; and Li, Al, and Si with (2) Si.sub.3 N.sub.4 powder, and sintering the mixture; and a process for forming said metal oxide coating on the surface of whiskers which comprises dipping whiskers in a solution of an inorganic or organic salt of at least one metallic element selected from the group consisting of the elements of the groups 2A, 3A, and 4A of the periodic table, Li, and Al and heat treating the whiskers having adhered thereto the metallic salt at a temperature not less than the thermal decomposition temperature of said metallic salt. The SiC whisker-reinforced Si.sub. 3 N.sub.4 composite material exhibits improved strength particularly at high temperatures and improved toughness.

    Silicon nitride composite sintered body and process for producing the same
    4.
    发明授权
    Silicon nitride composite sintered body and process for producing the same 失效
    氮化硅复合烧结体及其制造方法

    公开(公告)号：US5384292A

    公开(公告)日：1995-01-24

    申请号：US220457

    申请日：1994-03-31

    申请人： Jin-Joo Matsui ,  Osamu Komura ,  Akira Yamakawa ,  Masaya Miyake

    发明人： Jin-Joo Matsui ,  Osamu Komura ,  Akira Yamakawa ,  Masaya Miyake

    IPC分类号： C04B35/584 ,  C04B35/58

    CPC分类号： C04B35/584

    摘要： A silicon nitride composite sintered which comprises crystal grains of silicon nitride and/or sialon having an average minor axis length of 0.05 to 3 .mu.m and an aspect ratio of 10 or less and foreign particles dispersed in the crystal grains and/or the grain boundary phase, said particles having a thermal expansion coefficient of 5.times.10.sup.-6 /.degree.C. or more and an average particle size of 1 to 500 nm. The sintered body is produced by wet mixing silicon nitride powder, at least two sintering aids selected from among Y.sub.2 O.sub.3, Al.sub.2 O.sub.3, AlN and MgO and at least one compound selected from among the oxides, nitrides, carbides and silicides of the elements, excluding Si and C, of the groups IIa, IIIa, IVa, Va, VIa, IIb, IIIb and IVb of the Periodic Table to form a molding; and heat treating under the specified conditions. The sintered body can also be obtained by coating the surfaces of silicon nitride crystal grains with an organometallic compound convertible to the above foreign particles, heat treating and sintering with the sintering aid.

    摘要翻译： 一种氮化硅复合材料，其包含平均短轴长度为0.05〜3μm，长径比为10以下的氮化硅和/或赛隆的晶粒和分散在晶粒和/或晶界中的异物的氮化硅复合体 所述颗粒的热膨胀系数为5×10 -6 /℃以上，平均粒径为1〜500nm。 烧结体通过湿式混合氮化硅粉末，至少两种选自Y 2 O 3，Al 2 O 3，AlN和MgO的烧结助剂和选自元素的氧化物，氮化物，碳化物和硅化物中的至少一种化合物，除Si和 C，元素周期表IIa，IIIa，IVa，Va，VIa，IIb，IIIb和IVb族中的一种，形成一个成型体; 并在规定条件下进行热处理。 烧结体也可以通过用可转化为上述外来颗粒的有机金属化合物涂覆氮化硅晶粒表面，用烧结助剂进行热处理和烧结来获得。

    Composite bearing structure
    5.
    发明授权
    Composite bearing structure 失效
    复合轴承结构

    公开(公告)号：US5675201A

    公开(公告)日：1997-10-07

    申请号：US295623

    申请日：1994-08-24

    申请人： Osamu Komura ,  Tetsuya Katayama ,  Akira Yamakawa ,  Kenji Matsunuma ,  Norio Yasuoka ,  Matsuo Higuchi ,  Masaya Miyake

    发明人： Osamu Komura ,  Tetsuya Katayama ,  Akira Yamakawa ,  Kenji Matsunuma ,  Norio Yasuoka ,  Matsuo Higuchi ,  Masaya Miyake

    IPC分类号： F16C17/02 ,  F16C32/00 ,  F16C32/04 ,  F16C33/10 ,  F16C33/24 ,  F16C39/06 ,  H02K7/08 ,  H02K7/09

    CPC分类号： F16C32/0427 ,  F16C17/107 ,  F16C32/0431 ,  F16C33/107 ,  F16C39/063

    摘要： A composite bearing structure that has a high rotational accuracy and that can withstand high-speed rotation comprises first bearing means, second bearing means, third bearing means and fourth bearing means. The first bearing means supports a radial impact force which is applied to a rotator during rotation, and is formed by an inner ring (1) and an outer ring (2) consisting of silicon nitride ceramics sintered bodies. The second bearing means supports an axial load which is applied to the rotator while maintaining a prescribed clearance with the rotator, and is formed by a magnetic bearing body of two permanent magnets (12) and (13) which are thrust-directionally opposed to each other. The third bearing means maintains the radial rotational accuracy of the rotator, and is formed by a radial dynamic pressure producing groove (5) which is formed in a cylindrical surface of the inner ring (1). The fourth bearing means maintains the thrust-directional rotational accuracy of the rotator, and is formed by an air dome portion (100) which is confined in a semi-closed state by the inner ring (1), the outer ring (2) and a cover (4).

    摘要翻译： PCT No.PCT / JP94 / 00002 Sec。 371日期：1994年8月24日 102（e）日期1994年8月24日PCT 1994年1月4日PCT PCT。 公开号WO94 / 16233 PCT 日期1994年7月21日具有高旋转精度并能承受高速旋转的复合轴承结构包括第一轴承装置，第二轴承装置，第三轴承装置和第四轴承装置。 第一轴承装置支撑在旋转期间施加到旋转器的径向冲击力，并且由内环（1）和由氮化硅陶瓷烧结体组成的外圈（2）形成。 第二轴承装置支撑轴向载荷，该轴向载荷与旋转体保持规定的间隙，并且由两个永磁体（12）和（13）的磁轴承体形成，该永磁体与每个 其他。 第三轴承装置维持旋转体的径向旋转精度，并且由形成在内圈（1）的圆柱形表面中的径向动压产生槽（5）形成。 第四轴承装置保持旋转体的推力定向旋转精度，并且由内圈（1），外圈（2）和外圈（1）限定在半闭合状态的空气圆顶部（100）形成， 盖（4）。

    Slide member and method of manufacturing the same
    6.
    发明授权
    Slide member and method of manufacturing the same 失效
    滑动构件及其制造方法

    公开(公告)号：US5543371A

    公开(公告)日：1996-08-06

    申请号：US150189

    申请日：1993-11-30

    申请人： Tetsuya Katayama ,  Kaoru Murabe ,  Osamu Komura ,  Chihiro Kawai ,  Akira Yamakawa ,  Kenji Matsunuma ,  Norio Yasuoka ,  Matsuo Higuchi ,  Masaya Miyake

    发明人： Tetsuya Katayama ,  Kaoru Murabe ,  Osamu Komura ,  Chihiro Kawai ,  Akira Yamakawa ,  Kenji Matsunuma ,  Norio Yasuoka ,  Matsuo Higuchi ,  Masaya Miyake

    IPC分类号： C04B35/01 ,  C04B35/584 ,  C04B35/593 ,  C04B41/00 ,  C04B41/80 ,  F16C33/04 ,  F16C33/16 ,  C04B35/587

    CPC分类号： C04B41/009 ,  C04B35/01 ,  C04B35/584 ,  C04B35/593 ,  C04B35/5935 ,  C04B41/0072 ,  C04B41/80 ,  F16C33/043 ,  F16C33/16 ,  C04B2111/00353 ,  Y10T428/252 ,  Y10T428/2991 ,  Y10T428/30

    摘要： A slide member has a sliding surface made of ceramic and has a surface roughness of not more than 1.0 .mu.m in center line average roughness Ra. ceramic includes a silicon nitride sintered body, which contains crystal grains having a linear density of at least 35 per 30 .mu.m in length with a boundary phase volume ratio of not more than 15 volume %, and which contains pores of not more than 20 .mu.m in maximum diameter in a content of not more than 3%. In a method of manufacturing the slide member, it is possible to ensure smoothness of the sliding surface by grinding the sliding surface and thereafter heating the ceramic in either inert gas or an atmospheric air. A slide member that can be used under severe sliding conditions of high-speed sliding or the like and that has excellent wear resistance is obtained. Even if the slide member is used for a sliding part of a compressor or the like which employs a fluorocarbon containing no chlorine as a cooling medium, it is possible to prevent the occurrence of seizure and abnormal wear on the sliding surface.

    摘要翻译： PCT No.PCT / JP93 / 00385 Sec。 371日期：1993年11月30日 102（e）日期1993年11月30日PCT 1993年3月29日PCT公布。 公开号WO93 / 2002500 日期：1993年10月14日滑动部件具有由陶瓷制成的滑动面，中心线平均粗糙度Ra的表面粗糙度不大于1.0μm。 陶瓷包括氮化硅烧结体，其包含长度为30μm以上的线密度为35以上，边界相体积比为15体积％以下，并且含有不大于20μm的孔的晶粒 m最大直径，含量不超过3％。 在制造滑动构件的方法中，可以通过研磨滑动表面并随后在惰性气体或大气中加热陶瓷来确保滑动表面的平滑度。 可以获得可以在高速滑动等的严酷滑动条件下使用且具有优异的耐磨性的滑动构件。 即使将滑动部件用于使用不含氯的碳氟化合物作为冷却介质的压缩机等的滑动部件，也可以防止滑动面发生卡滞和异常磨损。

    Hydrodynamic bearing assembly
    7.
    发明申请
    Hydrodynamic bearing assembly 审中-公开
    流体动力轴承总成

    公开(公告)号：US20080170815A1

    公开(公告)日：2008-07-17

    申请号：US12073919

    申请日：2008-03-12

    申请人： Kaoru Murabe ,  Makoto Otsuki ,  Osamu Komura ,  Hisao Takeuchi

    发明人： Kaoru Murabe ,  Makoto Otsuki ,  Osamu Komura ,  Hisao Takeuchi

    IPC分类号： F16C32/06

    CPC分类号： F16C33/1065 ,  F16C17/026 ,  F16C17/045 ,  F16C17/107 ,  F16C23/04 ,  F16C33/102 ,  F16C2370/12 ,  G02B26/121 ,  G11B19/2009 ,  G11B19/2018 ,  H02K7/085 ,  H02K7/086

    摘要： This invention provides a hydrodynamic bearing assembly which realizes a high rotation rate in a stable manner with robust rigidity. The hydrodynamic bearing assembly has a total radial gap of 3 microns or less for preventing contact with the thrust bearing. The thrust bearing is a pump-out type, and the radial bearing has offset grooves on the surface thereof to supply fluid flow to the thrust bearing. A depth ratio of the grooves relative to the diameter of the shaft is preferably 0.005 or less to avoid reduced translational rigidity.

    摘要翻译： 本发明提供了一种流体动力轴承组件，其以稳定的方式实现高转速，具有坚固的刚性。 流体动力轴承组件具有3微米或更小的总径向间隙，以防止与推力轴承接触。 推力轴承是抽出式的，径向轴承在其表面上具有偏移槽，以向推力轴承提供流体流。 凹槽相对于轴的直径的深度比优选为0.005或更小，以避免降低的平移刚性。

    Dynamic-pressure bearing and spindle motor comprising the same
    9.
    发明授权
    Dynamic-pressure bearing and spindle motor comprising the same 失效
    动压轴承和主轴电动机组成

    公开(公告)号：US06870289B1

    公开(公告)日：2005-03-22

    申请号：US09720671

    申请日：2000-04-28

    申请人： Makoto Otsuki ,  Osamu Komura ,  Kaoru Murabe

    发明人： Makoto Otsuki ,  Osamu Komura ,  Kaoru Murabe

    IPC分类号： F16C17/10 ,  F16C33/10 ,  H02K7/08 ,  H02K5/12

    CPC分类号： F16C33/107 ,  F16C17/026 ,  F16C17/107 ,  F16C2370/12 ,  H02K7/085 ,  H02K7/086

    摘要： A bearing having a high thrust rigidity, an excellent vibration resistance, and a simple structure, as well as a spindle motor using such a bearing are provided. A groove or grooves 7 are disposed to either one of a shaft 2 and a sleeve 3 which form a radial bearing portion, to thereby exert thrust force in a direction which brings two mutually facing members at a thrust bearing portion closer to each other. The groove 7 is inclined with respect to an axis, and the inclination exerts, between the shaft 2 and the sleeve 3, thrust force in a thrust direction. The groove 7 may be herringbone-shaped or other type of groove which can generates such thrust force. It is also possible to further enhance the thrust force utilizing a negative pressure, with an upstream side of the radial bearing portion for introducing fluid such as air shielded from outside air.

    摘要翻译： 提供具有高推力刚性，优异的抗振性和简单结构的轴承以及使用这种轴承的主轴电动机。 凹槽或凹槽7设置在形成径向支承部分的轴2和套筒3中的任一个上，从而在使两个彼此相对的构件在推力轴承部分彼此更靠近的方向上施加推力。 槽7相对于轴线倾斜，并且倾斜在轴2和套筒3之间施加推力方向的推力。 凹槽7可以是能够产生这种推力的人字形或其他类型的凹槽。 也可以利用负压进一步提高推力，径向轴承部分的上游侧用于引入诸如外部空气屏蔽的空气的流体。

    Dynamic pressure bearing with improved starting characteristics
    10.
    发明授权
    Dynamic pressure bearing with improved starting characteristics 失效

    公开(公告)号：US06702464B1

    公开(公告)日：2004-03-09

    申请号：US09856093

    申请日：2001-08-16

    申请人： Hisao Takeuchi ,  Osamu Komura ,  Kaoru Murabe ,  Makoto Otsuki

    发明人： Hisao Takeuchi ,  Osamu Komura ,  Kaoru Murabe ,  Makoto Otsuki

    IPC分类号： F16C1710

    CPC分类号： F16C33/107 ,  F16C17/045 ,  F16C2370/12 ,  G02B26/121 ,  G11B19/2009 ,  H02K7/086

    摘要： A hydrodynamic bearing assembly with improved activation features is provided. The opposing surfaces in the radial and thrust bearings have grooves 2 and 5 with depths shallower gradually towards the downstream flow of the fluid passing therethrough, for generating the uniform dynamic pressure distribution. This allows the dynamic pressure distribution to be leveled so as to increase the bearing supporting force and prevent the dew grom being generated. Any one or both of the opposing surfaces in the thrust bearing has the inclined surface from the inner portion towards the outer portion so that the gap between the opposing surfaces is extended to about 2 microns. This causes the contacting points thereof when halted to be closer to the axis so that the friction can be reduced and the driving torque can be reduced when restating the bearing assembly. This also prevent the contact in the thrust bearing due to the external oscillating motion. Further, a second thrust plate 11 is secured on the other end surface of the sleeve 3 opposite to the thrust plate 4 so that the total weight of the rotational member is supported between the second thrust plate 11 and the end surface of the shaft 1 when halted, thereby reducing the friction at the time of activating.