MR fluid for increasing the output of a magnetorheological fluid damper
First Claim
1. A controllable magnetorheological damping device comprising a stationary housing, a movable piston and a field generator, and characterized by a design (working) gap of from 0.08 mm to 0.90 mm, said device containing magnetic-responsive particles from a single atomization process population stream dispersed in a carrier fluid (MR fluid), said particles are characterized by 10% volume (D10) of particles of 2 μ
- m up to and including a D10 of 5 μ
m;
a 50% volume of particles (D50) of 8 μ
m up to and including a D50 of 15 μ
m; and
90% volume of particles (D90) of 25 μ
m, up to and including a D90 of 40 μ
m; and
wherein said single process population exhibits a least squares regression from log normal distribution (R2) of 0.77 and higher.
1 Assignment
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Accused Products
Abstract
Magnetorheological devices, including damping devices, rotary devices, and haptic systems constructed with said devices are disclosed. The devices contain dry magnetically-responsive particles, or MR fluids containing the magnetically responsive particles. The magnetically soft particles characterized by a single process yield population of atomized particles having a cumulative 10%, 50% and 90% by volume, fraction within specified size, i.e., D10 of from 2 up to and including a D10 of 5 μm, a D50 8 μm up to and including a D50 of 15 μm, a D90 of 25 μm up to and including a D90 of 40 μm, and characterized by a least squares regression of log normal particles size against cumulative volume % fraction of greater than or equal to 0.77.
55 Citations
38 Claims
-
1. A controllable magnetorheological damping device comprising a stationary housing, a movable piston and a field generator, and characterized by a design (working) gap of from 0.08 mm to 0.90 mm, said device containing magnetic-responsive particles from a single atomization process population stream dispersed in a carrier fluid (MR fluid), said particles are characterized by 10% volume (D10) of particles of 2 μ
- m up to and including a D10 of 5 μ
m;
a 50% volume of particles (D50) of 8 μ
m up to and including a D50 of 15 μ
m; and
90% volume of particles (D90) of 25 μ
m, up to and including a D90 of 40 μ
m; and
wherein said single process population exhibits a least squares regression from log normal distribution (R2) of 0.77 and higher. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
- m up to and including a D10 of 5 μ
Specification