Back to results
US 7,070,707 B2Granted
Magnetorheological composition
AssigneeLord Corporation
InventorsK. Andrew Kintz, Teresa L. Forehand
Life of this patent
Estimating the term…
Abstract
The invention provides a magnetorheological composition having reduced off-state forces and good performance. Specifically, this invention is directed to a magnetorheological composition that may comprise non-sperical magnetic-responsive particles and at least one friction-reducing additive that reduces the interparticle friction between the magnetic-responsive particles.
Claims30
A magnetorheological composition comprising;
- magnetic responsive particles having an average number diameter distribution of about 6 to about 100 microns and at least one additive that reduces interparticle friction between the magnetic-responsive particles wherein the magnetic responsive particles are non-spherical in shape and the additive is present in an amount of about 0.1 to about 10 weight percent of the magnetic-responsive particles, and the additive comprises one or more of polytetrafluoroethylene, fluorinated ethylene-propylene polymer, or hexafluoropropylene epoxide polymer.
A magnetorheological composition comprising:
- magnetic responsive particles having an average number diameter distribution of about 6 to about 100 microns and about 50–70% having an irregular shape, and at least one additive that reduces interparticle friction between the magnetic-responsive particles and which comprises an inorganic molybdenum compound.
Dependencies are inferred from the claim text.