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1. 发明授权

US6149832A Stabilized magnetorheological fluid compositions 有权
标题翻译：稳定磁流变液组成
公开(公告)号：US6149832A
公开(公告)日：2000-11-21
申请号：US178755
申请日：1998-10-26
申请人： Robert Thomas Foister
发明人： Robert Thomas Foister
IPC分类号： H01F1/44
CPC分类号： H01F1/447
摘要： Magnetorheological fluids containing carbonyl iron particles with surface hydroxyl groups and high specific surface area in combination with nonpolar vehicles such as polyalphaolefins and glycol esters can be formulated to resist particle separation under high separation force applications. When the nonpolar vehicle having a suitably high molecular weight is used, the fluids may be used at working temperatures of the order of 200.degree. C.
摘要翻译：含有具有表面羟基和高比表面积的羰基铁颗粒与非极性载体如聚α-烯烃和乙二醇酯的组合的磁流变流体可以配制成在高分离力应用下抵抗颗粒分离。当使用具有适当高分子量的非极性载体时，流体可以在约200℃的工作温度下使用

2. 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。

3. 发明授权

US5667715A Magnetorheological fluids 失效
标题翻译：磁流变液
公开(公告)号：US5667715A
公开(公告)日：1997-09-16
申请号：US629249
申请日：1996-04-08
申请人： Robert Thomas Foister
发明人： Robert Thomas Foister
IPC分类号： H01F1/44 , H01F1/28
CPC分类号： H01F1/447
摘要： A significant increase in the yield stress of a magnetorheological fluid can be obtained at a given volume fraction of solid magnetic particles by employing as the particulate component a mixture of a first component of relatively large particles and a second component of relatively small particles such that the mean diameter of the large particles is at least 5 times the mean diameter of the small particles. The mixture of large and small particles provides a substantial increase in the yield stress without an increase in the viscosity of the mixture in the absence of a magnetic field.
摘要翻译：通过使用相对大的颗粒的第一组分和相对小的颗粒的第二组分的混合物作为颗粒组分，在给定的体积分数的固体磁性颗粒中可以获得磁流变液的屈服应力的显着增加，使得大颗粒的平均直径为小颗粒的平均直径的至少5倍。大颗粒和小颗粒的混合物提供屈服应力的显着增加，而不会在没有磁场的情况下混合物的粘度增加。

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