Method and magnetorheological fluid formulations for increasing the output of a magnetorheological fluid device
First Claim
1. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component has a fractional packing density of at least 0.50 prior to formulation into said magnetorheological fluid.
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Abstract
A magnetorheological fluid that includes a carrier component and a magnetizable particle component wherein the magnetizable particle component has a fractional packing density of at least 0.50 prior to formulation into the magnetorheological fluid. Use of this magnetorheological fluid can increase the force output of a magnetorheological device without increasing the viscosity of the fluid because the particle volume concentration in a working gap of the device increases when a magnetic field is applied.
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Citations
24 Claims
- 1. A magnetorheological fluid comprising a magnetizable particle component and a carrier component wherein said magnetizable particle component has a fractional packing density of at least 0.50 prior to formulation into said magnetorheological fluid.
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17. A method for increasing the force output of a magnetorheological fluid device, comprising;
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(a) positioning a first portion of a magnetorheological fluid in a working gap in said magnetorheological fluid device, said magnetorheological fluid comprising a carrier component and a magnetizable particle component wherein said magnetizable particle component has a fractional packing density of at least 0.50 prior to formulation into said magnetorheological fluid; (b) positioning a second portion of said magnetorheological fluid outside said working gap and in fluid communication with said first portion of said magnetorheological fluid; and (c) applying a magnetic external field to said first portion of said magnetorheological fluid so that the volume percent of said particle component in said first portion is increased relative to the volume percent of said particle component in said second portion. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A magnetorheological fluid device having a fluid containment compartment that contains a magnetorheological fluid, a first and second means for generating a magnetic field, and a working gap between said first and second means, wherein said magnetorheological fluid comprises a magnetizable particle component and a carrier component wherein said magnetizable particle component has a fractional packing density of at least 0.50 prior to formulation into said magnetorheological fluid.
Specification