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1. 发明申请

US20090014681A1 Magnetorheological fluid with a fluorocarbon thickener 有权
标题翻译：磁流变液与氟碳增稠剂
公开(公告)号：US20090014681A1
公开(公告)日：2009-01-15
申请号：US11827492
申请日：2007-07-12
申请人： Vardarajan R. Iyengar , Sally M. Yurgelevic , Robert T. Foister
发明人： Vardarajan R. Iyengar , Sally M. Yurgelevic , Robert T. Foister
IPC分类号： H01F1/00
CPC分类号： H01F1/447
摘要： A magnetorheological fluid formulation comprising magnetizable particles dispersed in carrier fluid and a thixotropic agent wherein the thixotropic agent comprises a fluorocarbon grease.
摘要翻译：包含分散在载体流体中的可磁化颗粒和触变剂的磁流变流体配制剂，其中触变剂包括氟碳润滑脂。

2. 发明授权

US06787058B2 Low-cost MR fluids with powdered iron 有权
标题翻译：低成本MR流体与铁粉
公开(公告)号：US06787058B2
公开(公告)日：2004-09-07
申请号：US10292075
申请日：2002-11-12
申请人： Robert T. Foister , Vardarajan R. Iyengar , Sally M. Yurgelevic
发明人： Robert T. Foister , Vardarajan R. Iyengar , Sally M. Yurgelevic
IPC分类号： H01F144
CPC分类号： H01F1/447
摘要： An MR fluid formulation comprising water-atomized iron powder dispersed in a liquid vehicle, wherein the atomized iron powder contributes to a higher magnetic effect, a lower viscosity and suitability for high temperature applications. The magnetizable particles are prepared by controlled water atomization and comprise iron having a passivating oxide surface layer. The passivating oxide surface layer advantageously comprises iron oxide and at least one alloying metal oxide, such as manganese oxide. Advantageously, the particles have a grain size of at least 4 &mgr;m and a mean diameter in the range of about 8-25 &mgr;m. The liquid vehicle advantageously comprises a mixture of at least two liquid components of different surface functionality and an organoclay stabilization mixture in which at least one organoclay is selected for each liquid vehicle component. Exemplary MR fluid formulations of the present invention utilize a high-viscosity, low volatility base fluid, water-atomized iron powder, multi-component organoclays and multi-component additives to achieve the desired viscosity and durability of a fully formulated MR fluid which will satisfy the requirements of second and third generation MR fluids.
摘要翻译：一种包含分散在液体载体中的水雾化铁粉末的MR流体配方，其中所述雾化铁粉有助于较高的磁效应，较低的粘度和对于高温应用的适用性。可磁化颗粒通过受控的水雾化制备，并且包含具有钝化氧化物表面层的铁。钝化氧化物表面层有利地包括氧化铁和至少一种合金化金属氧化物，例如氧化锰。有利地，颗粒具有至少4μm的颗粒尺寸和约8-25μm的范围内的平均直径。液体载体有利地包括至少两种不同表面官能团的液体组分和有机粘土稳定混合物的混合物，其中为每种液体载体组分选择至少一种有机粘土。本发明的示例性MR流体配方利用高粘度，低挥发性基础流体，水雾化铁粉，多组分有机粘土和多组分添加剂来实现将满足的完全配制的MR流体的所需粘度和耐久性第二代和第三代MR流体的要求。

3. 发明授权

US06599439B2 Durable magnetorheological fluid compositions 有权
标题翻译：耐久磁流变液组成
公开(公告)号：US06599439B2
公开(公告)日：2003-07-29
申请号：US09737298
申请日：2000-12-14
申请人： Vardarajan R. Iyengar , Robert T. Foister
发明人： Vardarajan R. Iyengar , Robert T. Foister
IPC分类号： H01F144
CPC分类号： H01F1/447
摘要： A durable magnetorheological fluid suitable for use in high compression vibration dampening devices comprising mechanically hard magnetizable particles of unreduced carbonyl iron, cobalt-iron alloys, or mixtures thereof, a carrier fluid of a mixture of polyalphaolefin and a plasticizer, unreduced fumed silica and optionally an ethoxylated amine.
摘要翻译：适用于高压缩振动阻尼装置的耐久性磁流变流体，其包括未还原的羰基铁，钴 - 铁合金或其混合物的机械硬磁化颗粒，聚α-烯烃和增塑剂的混合物的载体流体，未还原的热解法二氧化硅和任选的乙氧基化胺。

4. 发明申请

US20070170392A1 ADDITIVES PACKAGE AND MAGNETORHEOLOGICAL FLUID FORMULATIONS FOR EXTENDED DURABILITY 有权
标题翻译：添加剂包装和磁性流体制剂延长耐久性
公开(公告)号：US20070170392A1
公开(公告)日：2007-07-26
申请号：US11623828
申请日：2007-01-17
申请人： Robert T. Foister , Vardarajan R. Iyengar , Sally M. Yurgelevic
发明人： Robert T. Foister , Vardarajan R. Iyengar , Sally M. Yurgelevic
IPC分类号： H01F1/00
CPC分类号： H01F1/447
摘要： An additives package for use in an MR fluid formulation is provided, as well as an MR fluid formulation containing the additives package. In one embodiment, the additives package comprises an organomolybdenum dithiocarbamate, an ashless dithiocarbamate, and a triazole compound, such as a tolutriazole compound. In another embodiment, the additives package may further include an aminic antioxidant, such as an alkylated diphenylamine. In another embodiment, the additives package is free of an organomolybdate ester. In another embodiment, the additives package consists of the organomolybdenum dithiocarbamate, the ashless dithiocarbamate, the triazole compound, and optionally the aminic antioxidant. In addition to the additives package, the magnetorheological fluid formulation comprises magnetizable particles, a carrier fluid, and a thickening agent.
摘要翻译：提供了用于MR流体配方的添加剂包，以及含有添加剂包的MR流体配方。在一个实施方案中，添加剂包含有二硫代氨基甲酸有机钼，无灰二硫代氨基甲酸盐和三唑化合物如甲苯三唑化合物。在另一个实施方案中，添加剂包装可以进一步包括胺类抗氧化剂，例如烷基化二苯胺。在另一个实施方案中，添加剂包装不含有机钼酸酯。在另一个实施方案中，添加剂包由有机钼二硫代氨基甲酸盐，无灰二硫代氨基甲酸盐，三唑化合物和任选的氨基抗氧化剂组成。除了添加剂包装之外，磁流变流体配方包括可磁化颗粒，载体流体和增稠剂。

5. 发明授权

US06679999B2 MR fluids containing magnetic stainless steel 失效
标题翻译：含磁性不锈钢的MR流体
公开(公告)号：US06679999B2
公开(公告)日：2004-01-20
申请号：US09805084
申请日：2001-03-13
申请人： Vardarajan R. Iyengar , Robert T. Foister , James C. Johnson
发明人： Vardarajan R. Iyengar , Robert T. Foister , James C. Johnson
IPC分类号： C04B3500
CPC分类号： C10M171/001
摘要： A magnetorheological fluid formulation exhibiting consistently high yield stress during use. The MR fluid comprises martensitic or ferritic stainless steel particles prepared by a controlled water or inert gas atomization process. The stainless steel particles are resistant to corrosion and oxidation, are generally smooth and spherical, and maintain their shape and size distribution throughout their use under an applied magnetic field.
摘要翻译：在使用期间表现出一致的高屈服应力的磁流变流体配方。 MR流体包括通过受控的水或惰性气体雾化过程制备的马氏体或铁素体不锈钢颗粒。不锈钢颗粒耐腐蚀和氧化，通常是光滑和球形的，并且在施加的磁场下在其使用期间保持其形状和尺寸分布。

6. 发明授权

US07731863B2 Magnetorheological fluid with a fluorocarbon thickener 有权
标题翻译：磁流变液与氟碳增稠剂
公开(公告)号：US07731863B2
公开(公告)日：2010-06-08
申请号：US11827492
申请日：2007-07-12
申请人： Vardarajan R. Iyengar , Sally M. Yurgelevic , Robert T. Foister
发明人： Vardarajan R. Iyengar , Sally M. Yurgelevic , Robert T. Foister
IPC分类号： H01F1/44
CPC分类号： H01F1/447
摘要： A magnetorheological fluid formulation comprising magnetizable particles dispersed in carrier fluid and a thixotropic agent wherein the thixotropic agent comprises a fluorocarbon grease.
摘要翻译：包含分散在载体流体中的可磁化颗粒和触变剂的磁流变流体配制剂，其中触变剂包括氟碳润滑脂。

7. 发明授权

US07575695B2 Additives package and magnetorheological fluid formulations for extended durability 有权
标题翻译：添加剂包装和磁流变液配方可延长使用寿命
公开(公告)号：US07575695B2
公开(公告)日：2009-08-18
申请号：US11623828
申请日：2007-01-17
申请人： Robert T. Foister , Vardarajan R. Iyengar , Sally M. Yurgelevic
发明人： Robert T. Foister , Vardarajan R. Iyengar , Sally M. Yurgelevic
IPC分类号： H01F1/44
CPC分类号： H01F1/447
摘要： An additives package for use in an MR fluid formulation is provided, as well as an MR fluid formulation containing the additives package. In one embodiment, the additives package comprises an organomolybdenum dithiocarbamate, an ashless dithiocarbamate, and a triazole compound, such as a tolutriazole compound. In another embodiment, the additives package may further include an aminic antioxidant, such as an alkylated diphenylamine. In another embodiment, the additives package is free of an organomolybdate ester. In another embodiment, the additives package consists of the organomolybdenum dithiocarbamate, the ashless dithiocarbamate, the triazole compound, and optionally the aminic antioxidant. In addition to the additives package, the magnetorheological fluid formulation comprises magnetizable particles, a carrier fluid, and a thickening agent.
摘要翻译：提供了用于MR流体配方的添加剂包，以及含有添加剂包的MR流体配方。在一个实施方案中，添加剂包含有二硫代氨基甲酸有机钼，无灰二硫代氨基甲酸盐和三唑化合物如甲苯三唑化合物。在另一个实施方案中，添加剂包装可以进一步包括胺类抗氧化剂，例如烷基化二苯胺。在另一个实施方案中，添加剂包装不含有机钼酸酯。在另一个实施方案中，添加剂包由有机钼二硫代氨基甲酸盐，无灰二硫代氨基甲酸盐，三唑化合物和任选的氨基抗氧化剂组成。除了添加剂包装之外，磁流变流体配方包括可磁化颗粒，载体流体和增稠剂。

8. 发明授权

US06451219B1 Use of high surface area untreated fumed silica in MR fluid formulation 有权
标题翻译：在MR流体配方中使用高表面积未处理的热解法二氧化硅
公开(公告)号：US06451219B1
公开(公告)日：2002-09-17
申请号：US09723925
申请日：2000-11-28
申请人： Vardarajan R. Iyengar , Robert T. Foister
发明人： Vardarajan R. Iyengar , Robert T. Foister
IPC分类号： H01F144
CPC分类号： H01F1/447
摘要： A magnetorheological fluid formulation exhibiting high yield stress at high surfactant concentrations. The formulation has a strong network formation due to incorporation of a high surface area untreated fumed silica as a thixotropic agent. This untreated fumed silica has a surface area of at least about 250 m2/g, which enables a surfactant concentration in the formulation in an amount up to about 35% by weight relative to the weight of the fumed silica.
摘要翻译：在高表面活性剂浓度下表现出高屈服应力的磁流变液体制剂。由于掺入高表面积未经处理的热解法二氧化硅作为触变剂，配方具有强的网络形成。该未处理的热解法二氧化硅具有至少约250m 2 / g的表面积，其使制剂中的表面活性剂浓度相对于热解二氧化硅的重量高达约35重量％。

9. 发明授权

US06638443B2 Optimized synthetic base liquid for magnetorheological fluid formulations 有权
公开(公告)号：US06638443B2
公开(公告)日：2003-10-28
申请号：US09961217
申请日：2001-09-21
申请人： Vardarajan R. Iyengar , Robert T. Foister
发明人： Vardarajan R. Iyengar , Robert T. Foister
IPC分类号： H01F144
CPC分类号： H01F1/447
摘要： A magnetorheological fluid formulation in which the base liquid is optimized to exhibit an acceptable viscosity, a low volatility, improved low temperature flow properties, and an improved elastomeric compatibility. The fluid formulation includes a base liquid containing a mixture of 1-dodecene polyalphaolefin and a diester, such as dioctyl sebacate. The diester is added to the mixture in an amount effective to produce seal swelling and to lower the pour point. The viscosity of the fluid formulation is suitable for diverse vibration damping applications that require a vibration damping device to operate in the temperature range of about −40° C. to about 100° C. The low volatility and seal swelling properties of the fluid formulation reduce, inhibit or eliminate fluid loss about the seals of the vibration damping device.

10. 发明授权

US06592772B2 Stabilization of magnetorheological fluid suspensions using a mixture of organoclays 有权
标题翻译：使用有机粘土的混合物稳定磁流变液体悬浮液
公开(公告)号：US06592772B2
公开(公告)日：2003-07-15
申请号：US10015981
申请日：2001-12-10
申请人： Robert T. Foister , Vardarajan R. Iyengar , Sally M. Yurgelevic
发明人： Robert T. Foister , Vardarajan R. Iyengar , Sally M. Yurgelevic
IPC分类号： H01F144
CPC分类号： H01F1/447
摘要： A magnetorheological fluid formulation comprising magnetizable particles dispersed in a multi-component liquid vehicle comprising an organoclay stabilization mixture. At least one organoclay is selected for each liquid vehicle component, each organoclay having a surface chemistry that renders it preferentially compatible with the surface functionality of one of the liquid components relative to its compatibility to the remaining components whereby it is effective to stabilize, or gel, that component. A method of making an MR fluid is also provided in which liquid vehicle components are blended together, the organoclay mixture is added to the blend, and magnetizable particles are suspended therein, resulting in a stable MR fluid of suitable viscosity and yield stress.
摘要翻译：一种磁流变液体制剂，其包含分散在包含有机粘土稳定混合物的多组分液体载体中的可磁化颗粒。对于每种液体载体组分选择至少一种有机粘土，每种有机粘土具有表面化学性质，使其优先与其中一种液体组分的表面官能度相容，相对于其与其余组分的相容性，由此其有效稳定或凝胶，那个组件。还提供了一种制备MR流体的方法，其中将液体载体组分混合在一起，将有机粘土混合物加入到共混物中，并将可磁化颗粒悬浮在其中，得到具有适当粘度和屈服应力的稳定的MR流体。

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