Patent Number: 6,253,657

Title: Steering apparatus

Abstract: A vehicle steering apparatus (10) for turning steerable wheels (14, 16) of a vehicle includes a member (44) movable linearly in opposite directions to turn the steerable wheels in opposite directions. A housing (40) has a chamber (42) into which the member (44) extends. A piston (46) secured to the member (44) is located in the chamber (42). The piston (46) divides the chamber (42) into first and second chamber portions (48, 50). Fluid pressure in the first chamber portion (48) acts on a first area (116) of the piston (46) to cause Linear movement of the member (44) in one direction. Fluid pressure in the second chamber portion (50) acts on a second area (118) of the piston (46) to cause linear movement of the member (44) in a second direction opposite the one direction. The second area (118) of the piston (46) is less than the first area (116) of the piston. A spring (122) acts to urge the member (44) in the second direction. The spring (122) applies a force to the member (44) to balance the forces acting on the member to move the member when the pressure in the first chamber portion (48) equals the pressure in the second chamber portion (50).

Inventors: Cartwright; Mark A. (West Lafayette, IN)

Assignee: TRW Inc.

International Classification: B62D 5/20 (20060101); B62D 3/06 (20060101); B62D 5/10 (20060101); B62D 3/00 (20060101); B62D 5/12 (20060101); B62D 5/24 (20060101); F15B 9/00 (20060101); F15B 15/14 (20060101); F15B 15/17 (20060101); F15B 15/00 (20060101); F15B 9/10 (20060101); F15B 009/10 ()

Expiration Date: 07/03/2018