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Control cylinder for a steering system of a motor vehicle

  • US 6,206,421 B1
  • Filed: 05/03/1999
  • Issued: 03/27/2001
  • Est. Priority Date: 05/02/1998
  • Status: Expired due to Fees
First Claim
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1. Control cylinder for a steering system of a motor vehicle, with a cylinder housing in which a piston part attached to a piston rod is mounted in a linearly displaceable manner, said piston part dividing a cylinder chamber within the cylinder housing into two working chambers axially opposite one another, said chambers being filled completely with a damping medium, with the piston part having at least one through-flow cross section connecting the working chambers together, said cross section being closable by at least one sealing member,wherein the at least one sealing member includes an annular flexible sealing lip, the annular flexible sealing lip projecting radially inwardly towards the piston rod, wherein said lip in its unloaded resting position being inclined in an axial direction relative to the piston part, keeping the through-flow cross section open and, upon an abrupt relative movement being deformable by the level of an impact load into a closed position that substantially seals off the through-flow cross section, with the resistance to deformation of the sealing lip being chosen so that the sealing lip remains in its resting position during normal adjustments between the piston rod and cylinder housing.

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