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39 条记录 (耗时 0.025 秒)

    Electroconductive magnetic fluid composition and process for producing the same
    11.
    发明授权
    Electroconductive magnetic fluid composition and process for producing the same 失效
    电磁磁性液体组合物及其制造方法

    公开(公告)号：US5135672A

    公开(公告)日：1992-08-04

    申请号：US514974

    申请日：1990-04-26

    申请人： Toshikazu Yabe ,  Atsushi Yokouchi

    发明人： Toshikazu Yabe ,  Atsushi Yokouchi

    IPC分类号： C09K3/16 ,  C10M141/12 ,  C10N10/16 ,  C10N40/14 ,  H01B1/00 ,  H01B1/20 ,  H01F1/12 ,  H01F1/34 ,  H01F1/44

    CPC分类号： H01F1/44

    摘要： An electroconductive magnetic fluid composition is disclosed comprising a low volatility organic solvent as a carrier, a surface active agent having an lipophilic group with a strong affinity for the solvent, fine ferromagnetic particles coated at the surface thereof with the surface active agent and dispersed in the organic solvent, and a tertiary amine and an organic acid as an electrifying agent. The electroconductive magnetic fluid composition of the present invention is produced, preferably, including the steps of admixing fine ferromagnetic particles, a low boiling point organic solvent an surface active agent and separating to remove any fine particles of poor dispersibility.

    摘要翻译： 公开了一种导电磁性流体组合物，其包含作为载体的低挥发性有机溶剂，具有对溶剂具有强亲和力的亲油基团的表面活性剂，在其表面用表面活性剂涂布的细小铁磁颗粒并分散在 有机溶剂，叔胺和有机酸作为带电剂。 本发明的导电性磁性液体组合物优选地包括以下步骤：将细的铁磁颗粒，低沸点有机溶剂和表面活性剂混合并分离以除去分散性差的细颗粒。

    Magnetic fluid sealing device
    16.
    发明授权
    Magnetic fluid sealing device 失效
    磁流体密封装置

    公开(公告)号：US5215313A

    公开(公告)日：1993-06-01

    申请号：US780687

    申请日：1991-10-21

    申请人： Atsushi Yokouchi ,  Shigeki Matsunaga

    发明人： Atsushi Yokouchi ,  Shigeki Matsunaga

    IPC分类号： F16J15/43 ,  G11B19/20 ,  G11B33/14

    CPC分类号： B82Y30/00 ,  F16J15/43 ,  G11B19/2009 ,  F05C2225/04 ,  G11B33/14

    摘要： A magnetic fluid sealing device is provided for sealing a gap between a first member and a second member movable relative to each other. The device has a magnetic fluid and a magnet for retaining the magnetic fluid in the gap. A two-dimensionally bonded monomolecular layer is formed as an oil-repelling layer from a coupling agent on at least an intermediate surface area of at least one of the first and second members, which intermediate surface area is located between a fluid-deposited surface area and a fluid-free surface area.

    摘要翻译： 提供一种磁性流体密封装置，用于密封第一构件和可相对于彼此移动的第二构件之间的间隙。 该装置具有用于将磁性流体保持在间隙中的磁性流体和磁体。 在第一和第二构件中的至少一个的至少一个的中间表面区域上形成二维结合单分子层作为防油层，该中间表面区域位于流体沉积表面积 和无流体的表面积。

    Electrically conductive ferrofluid composition
    17.
    发明授权
    Electrically conductive ferrofluid composition 失效
    导电铁磁流体组成

    公开(公告)号：US4867910A

    公开(公告)日：1989-09-19

    申请号：US119652

    申请日：1987-11-12

    申请人： Kenjiro Meguro ,  Atsushi Yokouchi

    发明人： Kenjiro Meguro ,  Atsushi Yokouchi

    IPC分类号： C10M141/00 ,  C09K3/10 ,  C10N40/14 ,  H01B5/16 ,  H01F1/12 ,  H01F1/34 ,  H01F1/44

    CPC分类号： H01F1/44

    摘要： A ferrofluid composition consists of organic solvent or solvents to be used as liquid carriers, a charge-transfer complex or complexes for imparting electrical conductivity to the composition, fine particles of ferromagnetic material and additives for stably dispersing the aforesaid fine particles of ferromagnetic material into the organic solvent(s). According to this ferrofluid composition electrical conductivity of the fluid is given by the charge-transfer complex, which enhances the electrical conductivity, that is, functions to prevent electrification from occurring. The charge-transfer complex is dissolved, solubilized or dispersed in the carrier either by itself or by the aid of any additives. The ferromagnetic particles act to adsorb the additives and disperse them stably in the carrier and thus contribute to imparting magnetic properties to the carrier.

    摘要翻译： 铁磁流体组合物由用作液体载体的有机溶剂或溶剂组成，用于赋予组合物导电性的电荷转移络合物或络合物，铁磁材料的细颗粒和用于将上述铁磁材料微粒稳定分散到 有机溶剂）。 根据这种铁磁流体组成，流体的导电性由电荷转移络合物给出，这增强了导电性，即防止发生起电的功能。 电荷转移复合物本身或借助任何添加剂溶解，溶解或分散在载体中。 铁磁颗粒起着吸附添加剂的作用，并将它们稳定地分散在载体中，从而有助于赋予载体磁性。