专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4673997A Electrically conductive ferrofluid bearing and seal apparatus and low-viscosity electrically conductive ferrofluid used therein 失效
标题翻译：导电铁磁流体轴承和密封装置以及其中使用的低粘度导电铁磁流体
公开(公告)号：US4673997A
公开(公告)日：1987-06-16
申请号：US773627
申请日：1985-09-09
申请人： Hanumaiah L. Gowda , Kuldip Raj , Lucian Borduz
发明人： Hanumaiah L. Gowda , Kuldip Raj , Lucian Borduz
IPC分类号： C09K3/10 , F16J15/43 , G11B19/20 , G11B33/14 , H01B1/24 , H01F1/44 , G11B5/52 , E21B33/00 , G11B21/04
CPC分类号： F16C33/1035 , F16C41/002 , F16J15/43 , G11B19/2009 , G11B33/1473 , H01B1/24 , H01F1/44 , H01F1/442 , F16C2370/12 , Y10S277/919
摘要： An electrically conductive ferrofluid-film-bearing apparatus and seal apparatus for a shaft which employs a low-viscosity, electrically conductive ferrofluid composition, which composition comprises a liquid carrier, and contains in combination an electrically conductive amount of a cationic surfactant and dispersed carbon particles, to obtain a low-electrical-resistivity ferrofluid having a low viscosity and suitable for use in a ferrofluid bearing apparatus.
摘要翻译：一种用于轴的导电性铁磁流体膜承载装置和密封装置，其使用低粘度导电的铁磁性液体组合物，该组合物包含液体载体，并且组合包含导电量的阳离子表面活性剂和分散的碳颗粒，以获得具有低粘度且适用于铁磁流体轴承装置的低电阻率铁磁流体。

2. 发明授权

US4604229A Electrically conductive ferrofluid compositions and method of preparing and using same 失效
标题翻译：导电铁磁体组合物及其制备和使用方法
公开(公告)号：US4604229A
公开(公告)日：1986-08-05
申请号：US713757
申请日：1985-03-20
申请人： Kuldip Raj , Lucian Borduz , Hanumaiah L. Gowda
发明人： Kuldip Raj , Lucian Borduz , Hanumaiah L. Gowda
IPC分类号： C09K3/10 , F16J15/43 , G11B19/20 , G11B33/14 , H01B1/24 , H01F1/44 , H01B1/06
CPC分类号： F16C33/1035 , F16C41/002 , F16J15/43 , G11B19/2009 , G11B33/1473 , H01B1/24 , H01F1/44 , H01F1/442 , F16C2370/12 , Y10S277/919
摘要： An electrically conductive ferrofluid composition and a method of preparing and using the ferrofluid composition in a ferrofluid seal apparatus, and which ferrofluid composition comprises a liquid carrier having a colloidal dispersion of ferromagnetic particles in an amount sufficient to provide magnetic properties to the ferrofluid composition and carbon particles in an amount sufficient to provide electrical conductive properties to the ferrofluid composition, the ferromagnetic and carbon particles stabilized in the ferrofluid composition by a surface active dispersing agent. The electrically conductive ferrofluid composition is usefully employed in a ferrofluid exclusion seal apparatus to provide an electrically conductive seal apparatus particularly useful for computer disk drives and sputtering apparatus in the semiconductive industry.
摘要翻译：一种导电性铁磁流体组合物和在铁磁流体密封装置中制备和使用铁磁流体组合物的方法，并且该铁磁流体组合物包含液体载体，该液体载体具有铁磁颗粒的胶体分散体，其量足以向铁磁性组合物和碳提供磁性足以提供导电性质的铁氧体组合物的颗粒，通过表面活性分散剂稳定在铁磁体组合物中的铁磁性和碳颗粒。导电性铁磁流体组合物有用地用于铁磁流体排除密封装置中，以提供特别适用于半导体工业中的计算机磁盘驱动器和溅射装置的导电密封装置。

3. 发明授权

US4575102A Coaxial, multiple-shaft ferrofluid seal apparatus 失效
标题翻译：同轴多轴铁磁流体密封装置
公开(公告)号：US4575102A
公开(公告)日：1986-03-11
申请号：US673550
申请日：1984-11-20
申请人： Kuldip Raj , Hanumaiah L. Gowda
发明人： Kuldip Raj , Hanumaiah L. Gowda
IPC分类号： F16J15/43 , F16J15/40
CPC分类号： F16J15/43
摘要： A compact, coaxial multiple-shaft ferrofluid seal apparatus which comprises: a housing; a central shaft and magnetically permeable coaxial shafts about the central shaft, the coaxial shafts having a pair of spaced apart nonmagnetically permeable insulator shaft sections; magnetically permeable bearings to support each shaft; pole piece elements to provide radial gaps within the inner or outer shaft surfaces; ferrofluid disposed in the radial gaps to provide a seal apparatus for the shafts of designed pressure capacity; and a single radially polarized permanent magnet to provide a source of magnetic flux for the seal apparatus.
摘要翻译：一种紧凑，同轴的多轴铁磁流体密封装置，包括：壳体; 中心轴和中心轴的导磁同轴轴，所述同轴轴具有一对间隔开的非磁性可渗透的绝缘体轴部分; 导磁轴承支承各轴; 极片元件以在内轴表面或外轴表面内提供径向间隙; 设置在径向间隙中的铁磁流体为轴设计的压力容量提供密封装置; 和单个径向极化永磁体，以提供用于密封装置的磁通源。

4. 发明授权

US4526382A Radially polarized multiple-stage ferrofluid seal apparatus 失效
标题翻译：径向极化多级铁磁流体密封装置
公开(公告)号：US4526382A
公开(公告)日：1985-07-02
申请号：US606586
申请日：1984-05-03
申请人： Kuldip Raj , Hanumaiah L. Gowda
发明人： Kuldip Raj , Hanumaiah L. Gowda
IPC分类号： F16C33/82 , F16J15/43 , G11B19/20 , F16J15/40
CPC分类号： F16J15/43
摘要： A compact, low cost, radially polarized multiple-stage ferrofluid seal apparatus which comprises a magnetically permeable housing, a magnetically permeable shaft to be sealed extending through the housing, one or more radially polarized permanent magnets to define a plurality of separate, spaced apart radial gaps between one polarized end of the permanent magnet and the surface of the shaft, ferrofluid in the radial gaps to define one or more separate, spaced apart ferrofluid O-ring seals about the surface of the shaft and a magnetically permeable bearing assembly adjacent to and in a magnetic flux relationship with at least one of the radial polarized magnets wherein the magnetic flux circuit extends between the radial polarized magnet, the housing, the bearing assembly, the shaft, and the ferrofluid in the radial gaps.
摘要翻译：一种紧凑，低成本的径向偏振多级铁磁流体密封装置，其包括导磁壳体，待透过轴的待密封的延伸穿过壳体的一个或多个径向极化的永磁体，以限定多个分开的间隔开的径向永磁体的一个极化端与轴的表面之间的间隙，在径向间隙中的铁磁流体，以限定围绕轴表面的一个或多个分离的间隔开的铁磁流体O形环密封件和与磁体与至少一个径向极化磁体的磁通关系中，其中磁通电路在径向间隙中在径向极化磁体，壳体，轴承组件，轴和铁磁流体之间延伸。

5. 发明授权

US4898480A Compact ferrofluidic electrically conducting sealed bearing 失效
标题翻译：紧凑型铁氟龙导电密封轴承
公开(公告)号：US4898480A
公开(公告)日：1990-02-06
申请号：US263539
申请日：1988-10-27
申请人： Kuldip Raj , Hanumaiah L. Gowda , Ronald Moskowitz
发明人： Kuldip Raj , Hanumaiah L. Gowda , Ronald Moskowitz
IPC分类号： F16C33/10 , F16C33/66 , F16C33/76 , F16C33/82 , F16J15/43 , G11B19/20
CPC分类号： G11B19/2009 , F16C33/6644 , F16C33/765 , F16J15/43 , F16C2370/12 , Y10S277/919
摘要： A sealed, rolling element bearing includes an inner race attached to a shaft, an outer race attached to a housing, a plurality of rolling elements in an annular region and a pair of shields extending inwardly from the outer race toward the inner race so as to substantially enclose the annular region. The shields have a closely-spaced, noncontacting relationship with the inner race thereby defining gaps. The elements of the bearing are of magnetically permeable material, and the sealed bearing includes means for producing a magnetic field in the gaps and in the regions where the rolling elements contact the races. A ferrofluid is retained by the magnetic field in the gaps for sealing and in the regions of contact between the rolling elements and the races for lubrication. A reservoir of ferrofluid in the regions between the two seals replenishes ferrofluid lost at the sealing and lubrication areas. The magnetic field can be produced by permanent magnetization of the bearing assembly or by axially polarized permanent magnets located on either or both ends of the outer race. Such a bearing may be used with a magnetic or nonmagnetic shaft and permits relative motion between the shaft and the housing. The housing material is of nonmagnetic type when external magnets are used.
摘要翻译：密封的滚动元件轴承包括附接到轴的内座圈，附接到壳体的外座圈，环形区域中的多个滚动元件和从外座圈向内座圈向内延伸的一对护罩，以便基本上包围环形区域。盾牌与内圈具有紧密的非接触关系，从而定义了间隙。轴承的元件是导磁材料，并且密封的轴承包括用于在间隙中和在滚动元件与座圈接触的区域中产生磁场的装置。铁磁流体由用于密封的间隙中的磁场和用于润滑的滚动元件和滚道之间的接触区域中的磁场保持。两个密封件之间的区域中的铁磁流体储存件补充在密封和润滑区域损失的铁磁流体。磁场可以通过轴承组件的永久磁化或位于外圈的一端或两端的轴向极化永磁体来产生。这种轴承可以与磁性或非磁性轴一起使用并且允许轴和壳体之间的相对运动。当使用外部磁体时，外壳材料是非磁性的。

6. 发明授权

US4797013A Compact ferrofluidic electrically conducting sealed bearing 失效
标题翻译：紧凑型铁氟龙导电密封轴承
公开(公告)号：US4797013A
公开(公告)日：1989-01-10
申请号：US12193
申请日：1987-02-09
申请人： Kuldip Raj , Hanumaiah L. Gowda , Ronald Moskowitz
发明人： Kuldip Raj , Hanumaiah L. Gowda , Ronald Moskowitz
IPC分类号： F16C33/10 , F16C33/82 , F16J15/43 , G11B19/20
CPC分类号： G11B19/2009 , F16C33/6644 , F16C33/6688 , F16C33/765 , F16C41/002 , F16J15/43 , F16C2370/12
摘要： A sealed, rolling element bearing includes an inner race attached to a shaft, an outer race attached to a housing, a plurality of rolling elements in an annular region and a pair of shields extending inwardly from the outer race toward the inner race so as to substantially enclose the annular region. The shields have a closely-spaced, noncontacting relationship with the inner race thereby defining gaps. The elements of the bearing are of magnetically permeable material, and the sealed bearing includes means for producing a magnetic field in the gaps and in the regions where the rolling elements contact the races. A ferrofluid is retained by the magnetic field in the gaps for sealing and in the regions of contact between the rolling elements and the races for lubrication. A reservoir of ferrofluid in the regions between the two seals replenishes ferrofluid lost at the sealing and lubrication areas. The magnetic field can be produced by permanent magnetization of the bearing assembly or by axially polarized permanent magnets located on either or both ends of the outer race. Such a bearing may be used with a magnetic or nonmagnetic shaft and permits relative motion between the shaft and the housing. The housing material is of nonmagnetic type when external magnets are used.
摘要翻译：密封的滚动元件轴承包括附接到轴的内座圈，附接到壳体的外座圈，环形区域中的多个滚动元件和从外座圈向内座圈向内延伸的一对护罩，以便基本上包围环形区域。盾牌与内圈具有紧密的非接触关系，从而定义了间隙。轴承的元件是导磁材料，并且密封的轴承包括用于在间隙中和在滚动元件与座圈接触的区域中产生磁场的装置。铁磁流体由用于密封的间隙中的磁场和用于润滑的滚动元件和滚道之间的接触区域中的磁场保持。两个密封件之间的区域中的铁磁流体储存件补充在密封和润滑区域损失的铁磁流体。磁场可以通过轴承组件的永久磁化或位于外圈的一端或两端的轴向极化永磁体来产生。这种轴承可以与磁性或非磁性轴一起使用并且允许轴和壳体之间的相对运动。当使用外部磁体时，外壳材料是非磁性的。

7. 发明授权

US4527805A High-pressure ferrofluid seal apparatus 失效
标题翻译：高压铁磁流体密封装置
公开(公告)号：US4527805A
公开(公告)日：1985-07-09
申请号：US606582
申请日：1984-05-03
申请人： Hanumaiah L. Gowda , Kuldip Raj
发明人： Hanumaiah L. Gowda , Kuldip Raj
IPC分类号： F16C33/82 , F16J15/43 , F16J15/40
CPC分类号： F16J15/43
摘要： A high-pressure rotary seal apparatus with a radially-polarized permanent magnet, which seal apparatus comprises: a housing; a magnetically-permeable shaft to be sealed extending through the housing, the shaft characterized by a plurality of separate grooves or stages on the shaft; a radially-polarized permanent magnet extending about the shaft, at least one pole piece adjacent to and in a magnetic flux relationship with the radially-polarized permanent magnet and extending about the shaft, one polarized end of the polarized magnet and one end of the pole piece extending into a close, noncontacting relationship with the grooves on the surface of the shaft to form a plurality of separate radial gaps; ferrofluid disposed in the radial gaps to define a plurality of separate, spaced-apart ferrofluid O-ring seals about the surface of the shaft; and a generally cylindrical, magnetically-permeable keeper element extending about the other polarized end of the magnet and the other end of the pole piece in order to provide a magnetic flux circuit which extends between the radially-polarized magnet, the keeper element, the shaft, and the ferrofluid in the radial gaps.
摘要翻译：一种具有径向极化永磁体的高压旋转密封装置，该密封装置包括：壳体; 密封的导磁轴延伸穿过所述壳体，所述轴的特征在于在所述轴上具有多个单独的凹槽或台阶; 围绕轴延伸的径向极化永磁体，与径向极化永磁体相邻并且与磁极相邻并且与轴一起延伸的至少一个磁极片，并且围绕轴延伸，极化磁体的一个极化端和极的一端其与所述轴的表面上的凹槽延伸成紧密的非接触关系，以形成多个单独的径向间隙; 设置在所述径向间隙中的铁磁流体围绕所述轴的表面限定多个分离的间隔开的铁磁流体O形环密封件; 以及围绕磁体的另一个极化端延伸并且极片的另一端的大致圆柱形的可磁导通的保持元件，以便提供在径向极化磁体，保持元件，轴之间延伸的磁通回路，并且铁磁流体在径向间隙中。

8. 发明授权

US4526380A Single pole piece multiple-stage ferrofluid seal apparatus 失效
标题翻译：单极片多级铁磁流体密封装置
公开(公告)号：US4526380A
公开(公告)日：1985-07-02
申请号：US574358
申请日：1984-01-27
申请人： Kuldip Raj , Hanumaiah L. Gowda
发明人： Kuldip Raj , Hanumaiah L. Gowda
IPC分类号： F16C33/82 , F16J15/43 , H01F7/02 , F16J15/40
CPC分类号： F16J15/43
摘要： A single pole piece multiple-stage ferrofluid seal apparatus which comprises a non-permeable housing, an annular, axially polarized permanent magnet and a single pole piece on one side of the axially polarized permanent magnet and a magnetically permeable bearing assembly, such as a ball bearing assembly on the opposite side of the permanent magnet and a shaft extending through the housing with one end of the pole piece extending into a close, non-contacting relationship with the surface of the shaft, so as to form at the one end of the pole piece or on the surface of the shaft a plurality of separately spaced apart knife edges to define a plurality of spaced apart radial gaps and ferrofluid disposed in the radial gaps to define a plurality of spaced apart ferrofluid O-ring seals about the shaft surface, with the magnetic flux circuit passing between the permanent magnet, the pole piece, the radial gaps, the shaft, and the bearing assembly.
摘要翻译：一种单极多级铁磁流体密封装置，其包括不可渗透的壳体，环形的轴向极化永磁体和在轴向极化永磁体的一侧上的单极件和可渗透的轴承组件，例如球轴承组件在永磁体的相对侧上，以及轴延伸穿过壳体，其中极片的一端延伸到与轴的表面接近，非接触的关系，以便形成在极片或在轴的表面上，多个单独分开的刀刃以限定多个间隔开的径向间隙和设置在径向间隙中的铁磁流体，以围绕轴表面限定多个间隔开的铁磁流体O形环密封件，磁通电路通过永磁体，极片，径向间隙，轴和轴承组件之间。

9. 发明授权

US4502700A Ferrofluid linear seal apparatus 失效
标题翻译：铁磁线性密封装置
公开(公告)号：US4502700A
公开(公告)日：1985-03-05
申请号：US606585
申请日：1984-05-03
申请人： Hanumaiah L. Gowda , Kuldip Raj
发明人： Hanumaiah L. Gowda , Kuldip Raj
IPC分类号： F16J15/43 , F16J15/40 , F16J15/56
CPC分类号： F16J15/43
摘要： A ferrofluid linear seal apparatus to provide a hermetic seal about a shaft engaged in linear motion between a first and second environment, typically between a vacuum atmosphere and atmospheric pressure, which seal apparatus comprises: a housing for a shaft element; a nonmagnetically permeable shaft element adapted for linear motion within the housing; an annular permanent magnet about the shaft element; an annular magnetically-permeable pole piece about the shaft element, the outer diameter of the pole piece extending into a close, noncontacting relationship with the inner diameter of the housing to form a plurality of separate spaced-apart radial gaps; ferrofluid retained in the radial gaps by the magnetic flux of the permanent magnet; and linear bearings to provide support for the linear movement of the shaft element within the housing.
摘要翻译：一种铁磁流体线性密封装置，用于在通常在真空气氛和大气压力之间的第一和第二环境之间沿直线运动的轴提供气密密封，所述密封装置包括：用于轴元件的壳体; 适于在壳体内线性运动的非磁性可渗透轴元件; 围绕所述轴元件的环形永磁体; 围绕所述轴元件的环形磁导电极片，所述极片的外径与所述壳体的内径延伸成接近的非接触关系，以形成多个单独的间隔开的径向间隙; 铁磁流体通过永磁体的磁通量保持在径向间隙中; 和直线轴承，用于为轴元件在壳体内的线性运动提供支撑。

10. 外观设计

USD325199S Keyboard housing 失效
公开(公告)号：USD325199S
公开(公告)日：1992-04-07
申请号：US505950
申请日：1990-04-06
申请人： Hanumaiah L. Gowda , John Kowalik, Jr. , Henry J. Mack, Jr. , David J. Mayer , Stephen G. Miggels
设计人： Hanumaiah L. Gowda , John Kowalik, Jr. , Henry J. Mack, Jr. , David J. Mayer , Stephen G. Miggels

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式