Magnetorheological grease composition
AssigneeLord Corporation
InventorsK. Andrew Kintz, J. David Carlson, Beth C. Munoz, Julia D. Sessoms
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Abstract
The invention provides a magnetorheological grease composition which contains magnetic-responsive particles, a carrier fluid and a thickening agent. The composition according to the invention contains an effective amount of thickening agent to provide a composition of proper consistency with good properties and little settling of the magnetic-responsive particles.
Claims26
A magnetorheological grease composition comprising:
- magnetic-responsive particles;
- a carrier fluid;
- and
- at least one thickening agent selected from the group consisting of sodium stearate, calcium stearate, lithium stearate, potassium stearate, zinc stearate, strontium stearate, aluminum stearate, barium stearate, magnesium stearate, precipitated silica and fumed silica, and mixtures thereof, wherein the total amount of thickening agent is between about 30 and about 90 percent by volume relative to the total volume of the magnetorheological grease composition.
A magnetorheological grease composition comprising:
- carbonyl iron magnetic-responsive particles;
- a carrier fluid;
- and
- at least one thickening agent, wherein the grease composition has a NLGI consistency number of between about 00 and about 4.
A magnetorheological grease composition comprising:
- magnetic-responsive particles;
- a hydrocarbon oil carrier fluid derived from poly-α-olefin;
- and
- at least one thickening agent, wherein the total amount of thickening agent is between about 30 and about 90 percent by volume relative to the total volume of the magnetorheological grease composition.
A magnetorheological grease composition comprising:
- magnetic-responsive particles;
- a carrier fluid;
- and
- at least one thickening agent selected from the group consisting of precipitated silica and fumed silica, and mixtures thereof, wherein the total amount of thickening agent is between about 30 and about 90 percent by volume relative to the total volume of the magnetorheological grease composition.
A magnetorheological grease composition comprising:
- carbonyl iron magnetic-responsive particles;
- a synthetic hydrocarbon oil carrier fluid;
- and
- at least one thickening agent, wherein the grease composition has a NLGI consistency number of between about 00 and about 4.
Dependencies are inferred from the claim text.