Patent ID: 7562887

Claim:
A caster suspension system for a transport vehicle, comprising: a body pivotable about a first axis, said body having a first attachment station spaced apart from a second attachment station; an axle disposable along a second axis perpendicular to said first axis; said second axis spaced from said first axis by an amount sufficient to cause said axle and said second axis to caster about said first axis and move into alignment with the direction of travel of a transport vehicle when the transport vehicle is moved; an axle linkage member having a third attachment station spaced apart from a fourth attachment station, said third attachment station of said axle linkage member pivotally connected to said first attachment station of said body, and said fourth attachment station of said axle linkage member pivotally connected to said second attachment station of said body, said axle linkage member pivotable about a third axis parallel to said second axis; and, said axle pivotally connected to said axle linkage member, and said axle pivotable about a fourth axis perpendicular to said first, second and third axes.