Brakes – Internal-resistance motion retarder – Relative speed of thrust member or fluid flow
Reexamination Certificate
2005-08-25
2010-02-23
Schwartz, Christopher P (Department: 3657)
Brakes
Internal-resistance motion retarder
Relative speed of thrust member or fluid flow
C248S562000, C267S220000
Reexamination Certificate
active
07665585
ABSTRACT:
A vehicle suspension system includes a mechanical spring portion adapted to undergo suspension deflection, a spring seat contacting and supporting the mechanical spring portion, and a mechanical gear assembly which is operatively connected to the spring seat to control spring seat position and which is adapted to be driven by an electric motor. A method for operating a vehicle suspension system undergoing suspension deflection, wherein the vehicle suspension system includes a mechanical spring portion having a spring seat with a movable spring seat position, includes determining a frequency content of the suspension deflection. The method also includes electromechanically controlling the spring seat position in response to suspension deflection when the determined frequency content is in a low-frequency range below a wheel hop frequency.
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ABC Module, ZF Zachs, Driveline and Chassis Technology, ZF Friedrichshafen AG http://www.zfsachs.com/owx—7—30913—2—6—0—00000000000000.html?link=owx—7—3091.
Dickinson Wright PLLC
Honaker William H.
Schwartz Christopher P
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