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Claim construction in patent infringement suit over technology to prevent vehicle rollover

Judge Leonard P. Stark recently construed the following claim terms of U.S. Patent Nos. 5,529,153 and 5,437,354 relating to “technology for suppressing vehicular rolling motion, i.e. the tendency of the vehicle to tilt when the vehicle turns a corner or is driven around a sharp curve.” Cloud Farm Associates, L.P. v. Volkswagen Group of America, Inc., C.A. No. 10-502-LPS (D. Del. July 27, 2012)

“partially filled with hydraulic fluid”
“a chamber having two portions partially filed with hydraulic fluid”
“seal” /”sealing” /”seals”
“prevent flow of said fluid”
“preventing tilting of the frame or body of the vehicle”10/”preventing tilting
of the body of the vehicle”
“prevent movement of the piston and further tilting of the body of the
vehicle”
“a plate within said chamber having a substantially central opening
separating said fluid within the chamber into a lower portion and an upper
portion”
“a plate within said chamber having at least one opening separating the fluid
within the chamber into two portions”
“means within said chamber to separate said fluid within the chamber into
two portions”
“sealing means”
“means for sensing the tilt” terms
“means for moving the sealing means to seal”
“electromagnetic means to move said sealing means to seal”
“electromagnetic means for operating said sealing means”
“predetermined tilt position of the body”/”set tilt position of the body”
“electrical switch”/”means [including] an electrical switch”
“means … for energizing said electromagnetic means”
“said at least one opening”
“mercury switch”
“prevent any flow of said fluid”
“means for dampening the movement of the piston when the piston is
compressed or extended”
“being below”


Cloud Farm Associates, L.P. v. Volkswagen Group of America, Inc., C.A. No. 10-502-LPS (D. Del. July 27, 2012)

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