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US 2009/0014681 A1Published application
Magnetorheological fluid with a fluorocarbon thickener
OwnerVardarajan R. Iyengar, Sally M. Yurgelevic +1inventors
InventorsVardarajan R. Iyengar, Sally M. Yurgelevic, Robert T. Foister
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Abstract
A magnetorheological fluid formulation comprising magnetizable particles dispersed in carrier fluid and a thixotropic agent wherein the thixotropic agent comprises a fluorocarbon grease.
Claims25
A durable magnetorheological fluid formulation comprising:
- a carrier fluid,
- magnetizable particles dispersed in the carrier fluid and
- a thixotropic agent comprising a fluorocarbon grease wherein said thixotropic agent is effective to limit settling of the magnetizable particles.
A durable magnetorheological fluid formulation comprising:
- a carrier fluid,
- magnetizable particles dispersed in the carrier fluid, wherein the magnetizable particles comprise water atomized iron powder and
- a thixotropic agent comprising a fluorocarbon grease wherein said fluorocarbon grease has an NLGI grade of between about 1 and 3.
A method of making an MR fluid comprising:
- blending a carrier fluid including a polyalphaolefin and a plasticizer
- adding a fluorocarbon grease having an NLGI grade of between about 1 and 3;
- and
- dispersing magnetizable particles in the carrier fluid.
1 more element
Dependencies are inferred from the claim text.