Abstract: A suspension assembly for a carriage includes a first torsion assembly connected to a second torsion assembly in parallel such that force delivered to the first and second torsion assemblies through the wheels is distributed between the first and second torsion assemblies.

Abstract: An improved wheeled support assembly for a trailer spraying device including a tank for liquid to be sprayed mounted on a main frame of the device, and a spray assembly adapted to spray liquid from the tank in a predetermined pattern through a spray boom projecting from both sides of the frame. Two large wheels are mounted on each side of the main frame by a rigid wheel adapting frame fixed to the main frame that comprises two elongate support members each spaced from a different one of the sides of the main frame to provide wheel clearance spaces between those elongate support members and the sides of the main frame.