US Patent 8256782 Suspension assembly

A vehicle suspension system includes a frame mounting bracket. A torsion axle is pivotally attached to the frame mounting bracket. The torsion axle pivots about a suspension assembly pivot axis. An air spring support arm is rigidly attached to the torsion axle. An air spring is attached at one end to the frame mounting bracket and at an end of the support arm opposite the suspension assembly pivot axis. A spindle arm with a spindle is adapted for mounting a wheel assembly is attached to the torsion axle. The vehicle suspension system is adapted to include an optional cross-member brace adapted to attach to the frame mounting bracket allowing the cross-member brace to extend across a width of a vehicle to an adjacent vehicle suspension assembly.