Brakes – Internal-resistance motion retarder – Magnetic fluid or material
Reexamination Certificate
2007-12-04
2007-12-04
Nguyen, Xuan Lan (Department: 3683)
Brakes
Internal-resistance motion retarder
Magnetic fluid or material
C188S290000
Reexamination Certificate
active
11008419
ABSTRACT:
A controllable magnetorheological (MR) damper having first, second and third portions is disclosed. The first and second portions have a translational degree of freedom therebetween, and the third portion has a rotational degree of freedom with respect to the first and second portions. The first and third portions are coupled via a translation-to-rotation converter, and the second and third portions are coupled via a magnetorheological (MR) fluid. A bearing is disposed between the first and second portions for supporting a side load therebetween, a magnetic field generator is in field communication with the magnetorheological fluid, and a signal path is in signal communication with the magnetic field generator. The third portion is rotationally responsive to translational motion between the first and second portions, the shear stress characteristic of the magnetorheological fluid is responsive to the magnetic field generator, and the magnetic field generator is controllably responsive to an excitation signal from the signal path.
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General Motors Corporation
Nguyen Xuan Lan
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