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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。

4. 发明授权

US07070708B2 Magnetorheological fluid resistant to settling in natural rubber devices 有权
标题翻译：磁流变液耐天然橡胶装置沉降
公开(公告)号：US07070708B2
公开(公告)日：2006-07-04
申请号：US10836891
申请日：2004-04-30
申请人： Vardarajan R. Iyengar , Patrick N. Hopkins , Mark E. Myers
发明人： Vardarajan R. Iyengar , Patrick N. Hopkins , Mark E. Myers
IPC分类号： H01F1/44
CPC分类号： H01F1/447 , F16F13/305
摘要： A MR fluid formulation based upon a silicone liquid vehicle thickened with a treated fumed metal oxide and doped with one or more chemicals having hydrogen-bonding capability for use with natural rubber mounts. The MR fluid is resistant to settling of the magnetizable particles upon contact of the fluid with natural rubber. In one exemplary embodiment, the doping chemical is one or a combination of propylene glycol and a bifunctional ethoxylated amine.
摘要翻译：基于用经处理的热解金属氧化物增稠的硅氧烷液体载体的MR流体配方，并掺入一种或多种具有氢键能力的化学物质，用于天然橡胶底座。当流体与天然橡胶接触时，MR流体抵抗可磁化颗粒的沉降。在一个示例性实施方案中，掺杂化学品是丙二醇和双功能乙氧基化胺的一种或其组合。

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

US06811717B2 Magnetorheological compositions for use in magnetorheological fluids and method of preparing same 有权
标题翻译：用于磁流变流体的磁流变组合物及其制备方法
公开(公告)号：US06811717B2
公开(公告)日：2004-11-02
申请号：US10209176
申请日：2002-07-31
申请人： Vardarajan R. Iyengar , Robert Thomas Foister
发明人： Vardarajan R. Iyengar , Robert Thomas Foister
IPC分类号： H01F122
CPC分类号： H01F1/447 , Y10T428/2991
摘要： The subject invention provides a magnetorheological (MR) composition having improved resistance to oxidation and increased dispersability in a carrier fluid. The composition includes a plurality of metal particles and a surfactant including a hydrocarbon with at least one of a hydroxyl, a carbonyl, and an amine group bonded to the hydrocarbon for reacting with the metal particles. The surfactant is present in an amount such that from about 1% to about 20% of the amount of the surfactant is adsorbed to the metal particles. The surfactant is reacted with the metal particles such that about 75% to about 100% of a maximum amount of the surfactant adsorbs to the metal particles for improving the resistance of the metal particles to oxidation and for increasing the dispersability of the magnetorheological composition in the carrier fluid. The MR composition according to the subject invention is utilized in a magnetorheological (MR) fluid.
摘要翻译：本发明提供具有改进的抗氧化性和增加载体流体分散性的磁流变（MR）组合物。该组合物包括多个金属颗粒和表面活性剂，其包括与烃结合的羟基，羰基和胺基中的至少一个的烃，以与金属颗粒反应。表面活性剂的存在量使得表面活性剂的量的约1％至约20％被吸附到金属颗粒上。表面活性剂与金属颗粒反应，使得最多量的表面活性剂的约75％至约100％吸附到金属颗粒上，以改善金属颗粒的氧化性和提高磁流变组合物在载液根据本发明的MR组合物用于磁流变（MR）流体。

7. 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。

8. 发明授权

US06547983B2 Durable magnetorheological fluid compositions 有权
标题翻译：耐久磁流变液组成
公开(公告)号：US06547983B2
公开(公告)日：2003-04-15
申请号：US09737293
申请日：2000-12-14
申请人： Vardarajan R. Iyengar
发明人： Vardarajan R. Iyengar
IPC分类号： H01F144
CPC分类号： H01F1/447
摘要： A durable MR fluid formulation is described which includes mechanically hard magnetizable particles, a carrier fluid derived from a polyalphaolefin and a plasticizer, and at least one colloidal additive such as colloidal polytetrafluoroethylene or colloidal graphite. The use of these colloidal additives inhibits surface-to-surface contact and scuffing while providing reliable lubrication under boundary lubrication conditions.
摘要翻译：描述了一种耐久性MR流体配方，其包括机械硬磁化颗粒，衍生自聚α-烯烃和增塑剂的载体流体，以及至少一种胶态添加剂如胶体聚四氟乙烯或胶体石墨。使用这些胶体添加剂可在边界润滑条件下提供可靠的润滑，抑制表面接触和磨损。

9. 发明授权

US06508108B1 Settling test for magnetorheological fluids 失效
标题翻译：磁流变流体沉降试验
公开(公告)号：US06508108B1
公开(公告)日：2003-01-21
申请号：US10015340
申请日：2001-12-13
申请人： Vardarajan R. Iyengar , Michael W. Hurtt , Charles T. West , Justin A. Rindler , Perry K. Arnold
发明人： Vardarajan R. Iyengar , Michael W. Hurtt , Charles T. West , Justin A. Rindler , Perry K. Arnold
IPC分类号： G01N1504
CPC分类号： G01N11/00 , H01F1/447
摘要： A method of testing magnetorheological fluid comprises cycling the fluid at an elevated temperature, allowing the fluid to stand, performance testing the fluid, cycling the fluid at superimposed frequencies, and noting settling characteristics of the fluid.
摘要翻译：测试磁流变流体的方法包括在升高的温度下循环流体，允许流体静置，对流体进行性能测试，以叠加的频率循环流体，并注意流体的沉降特性。

10. 发明授权

US06892864B2 Temperature compensation for magnetorheological fluid dampers 有权
标题翻译：磁流变阻尼器的温度补偿
公开(公告)号：US06892864B2
公开(公告)日：2005-05-17
申请号：US09981082
申请日：2001-10-16
申请人： Vardarajan R. Iyengar , Bruce A. Heaston , John F. Hoying , David A. Shal , Darin D. Dellinger , Khaled M. Jundi , Jesse D. Jones , Timothy J. Juuhl , Robin Oakley , David J. Barta , Michael R. Lukuc
发明人： Vardarajan R. Iyengar , Bruce A. Heaston , John F. Hoying , David A. Shal , Darin D. Dellinger , Khaled M. Jundi , Jesse D. Jones , Timothy J. Juuhl , Robin Oakley , David J. Barta , Michael R. Lukuc
IPC分类号： F16F9/52 , F16F9/53
CPC分类号： F16F9/52 , F16F9/535
摘要： A temperature compensation method for controlling a damping force of a magnetorheological (MR) damper is disclosed. First, a base operating current as a function of a desired force level of a damping force of the MR damper is determined, and a temperature compensation as a function of an operating temperature of the MR damper is determined. Finally, the temperature compensation is applied to the base operating current to generate a compensated operating current as a function of the desired force level of the damping force and the operating temperature of the MR damper. To refine the compensated operating current, the temperature compensation can be determined as both a function of the operating temperature of the MR damper and a relative velocity of the MR damper.
摘要翻译：公开了一种用于控制磁流变（MR）阻尼器的阻尼力的温度补偿方法。首先，确定作为MR阻尼器的阻尼力的期望力水平的函数的基本操作电流，并且确定作为MR阻尼器的操作温度的函数的温度补偿。最后，将温度补偿应用于基极工作电流，以产生作为阻尼力的期望的力水平和MR阻尼器的工作温度的函数的补偿的工作电流。为了改善补偿的工作电流，可以将温度补偿确定为MR阻尼器的工作温度和MR阻尼器的相对速度的函数。

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