Spring devices – Resilient shock or vibration absorber – Including energy absorbing means or feature
Reexamination Certificate
2005-05-03
2005-05-03
Graham, Matthew C. (Department: 3683)
Spring devices
Resilient shock or vibration absorber
Including energy absorbing means or feature
C267S140150, C188S267200
Reexamination Certificate
active
06886819
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., D10of from 2 up to and including a D10of 5 μm, a D508 μm up to and including a D50of 15 μm, a D90of 25 μm up to and including a D90of 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.
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Forehand Teresa L.
Kintz K. Andrew
Dearth Miles B.
Graham Matthew C.
Lord Corporation
Sy Mariano
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