公开(公告)号：US4489950A

公开(公告)日：1984-12-25

申请号：US497856

申请日：1983-05-25

申请人： Alvan F. Chorney

发明人： Alvan F. Chorney

IPC分类号： H01F7/02 ,  F16J15/43 ,  F16J15/40

CPC分类号： F16J15/43

摘要： Pole-piece-magnet apparatus for use as single- or double-pole-piece ferrofluid seal apparatus and method of manufacture, which pole-piece-magnet apparatus comprises at least one washer-type metal-pole-piece element with one flat surface having a plurality of spaced-apart raised dimple elements thereon with outwardly extending anchoring surfaces; and a washer-like hard molded permanent magnet polymer ring element molded about and secured directly to the one flat surface of the pole-piece element by the anchoring surface on the raised dimples, the permanent magnet ring element having an inner diameter greater than the inner diameter of the pole-piece element and an outer diameter of about the same dimensions as the outer diameter of the pole-piece element.

摘要翻译： 用作单极或双极铁磁流体密封装置的杆式磁铁装置及其制造方法，该极片磁铁装置包括至少一个具有一个平坦表面的垫圈型金属极片元件， 多个间隔开的凸起的凹坑元件，其上具有向外延伸的固定表面; 以及通过所述凸起凹坑上的锚定表面模制并围绕所述极片元件的所述一个平坦表面直接固定的垫圈状硬成型永磁体聚合物环元件，所述永磁体环元件的内径大于所述内部 极片元件的直径和与极片元件的外径大致相同尺寸的外径。

公开(公告)号：US4252353A

公开(公告)日：1981-02-24

申请号：US33466

申请日：1979-04-26

申请人： Kuldip Raj ,  Ronald Moskowitz ,  Raoul Casciari ,  Alvan F. Chorney

发明人： Kuldip Raj ,  Ronald Moskowitz ,  Raoul Casciari ,  Alvan F. Chorney

IPC分类号： F16J15/43 ,  G11B19/20 ,  F16J15/16 ,  F16J15/40

CPC分类号： F16J15/43 ,  G11B19/2009 ,  Y10S277/917

摘要： A self-activating seal is formed by inserting a magnetically permeable shaft into a module which comprises: a magnet, two pole pieces and a magnetic fluid. The module is so constructed that the magnet and pole pieces form a cavity for storing the magnetic fluid until the shaft or similar element is inserted. Upon insertion of the shaft, the magnetic field is altered and the flux path diverted to the small gaps separating the pole pieces and the shaft. The magnetic fluid is drawn to the gas to form hermetic seals.

摘要翻译： 通过将导磁轴插入模块中形成自激活密封件，该模块包括：磁体，两个极片和磁性流体。 该模块被构造成使得磁体和极片形成用于存储磁性流体的空腔，直到插入轴或类似元件。 在插入轴时，磁场被改变，并且磁通路径转移到分开极片和轴的小间隙。 将磁性流体吸入气体以形成气密密封。

公开(公告)号：US4252328A

公开(公告)日：1981-02-24

申请号：US145828

申请日：1980-05-01

申请人： Kuldip Raj ,  Ronald Moskowitz ,  Raoul Casciari ,  Alvan F. Chorney

发明人： Kuldip Raj ,  Ronald Moskowitz ,  Raoul Casciari ,  Alvan F. Chorney

IPC分类号： F16C33/10 ,  F16J15/43 ,  G11B17/028 ,  G11B33/14 ,  F16J15/16 ,  F16J15/40

CPC分类号： G11B33/1473 ,  F16C33/1035 ,  F16J15/43

摘要： A self-activating ferrofluid-seal apparatus for a memory-disc-drive shaft, which seal apparatus comprises a ring magnet and a pair of pole pieces which form a cavity therebetween, a closed loop of a plastic tubular container with ferrofluid positioned within the cavity, and a penetration clamp to penetrate the plastic container prior to installation of the shaft element.

摘要翻译： 一种用于存储盘驱动轴的自激活铁磁流体密封装置，该密封装置包括环形磁体和在其间形成空腔的一对极片，塑料管状容器的闭合环，其中铁磁流体位于空腔内 ，以及在安装轴元件之前穿透塑料容器的穿透夹具。