Patent ID: 6253657
Filing Date: 2001-07-03
Classification: B62D,F15B

Abstract:
A vehicle steering apparatus for turning steerable wheels of a vehicle, said apparatus comprising:a member movable linearly in opposite directions to turn the steerable wheels in opposite directions;a housing having a chamber into which said member extends;a piston secured to said member and located in said chamber, said piston dividing said chamber into first and second chamber portions, fluid pressure in said first chamber portion acting on a first area of said piston to cause linear movement of said member in one direction, fluid pressure in said second chamber portion acting on a second area of said piston to cause linear movement of said member in a second direction opposite said one direction, said second area of said piston being less than said first area of said piston; anda spring acting to urge said member in said second direction, said spring applying a force to said member to balance the forces acting on said member to move said member when the pressure in said first chamber portion equals the pressure in said second chamber portion.