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US 2012/0074348 A1Published application
High durability magnetorheological fluids
AssigneeLord Corporation
InventorsTeresa L. Forehand, Daniel E. Barber
Life of this patent
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Abstract
A magnetorheological fluid comprising a mixture of soft and hard iron particles, an organic based carrier fluid, and optional additives such as anti-friction, anti-wear, or surfactants unexpectedly have improved durability when used in devices for control vibration and/or noise, for example, shock absorbers, elastomeric mounts, dampers, and the like.
Claims17
A magnetorheological fluid, comprising:
- a blend of two classes of magnetically responsive particles wherein one class is relatively hard and has a mean diameter particle range of about 1 micron to about 150 microns and the other class is relatively soft and has a mean diameter particle range of about 1 micron to about 100 microns, and wherein said fluid is free of fluorocarbons.
A method for forming a magnetorheological fluid, comprising the step of:
- blending hard magnetically responsive particles and soft magnetically responsive particles with a carrier fluid, said magnetorheological fluid being free of fluorocarbons, wherein said hard particles have a mean diameter particle range of 1 micron to 150 microns and the soft particles have a mean diameter particle range of 1 micron to 100 microns.
Dependencies are inferred from the claim text.