Patent ID: 7810832

Claim:
A steerable trailer comprising: a main frame assembly having opposite ends, a top side, a bottom side, a front side, and a back side, wherein the opposite ends are vertical; a pair of swinging arms, each swinging arm having a first end pivotally attached directly to the main frame assembly adjacent a wheel, each swinging arm extending forward from the main frame assembly independent of the other and terminating in second end attached to an assembly adapted for towing; the pair of swinging arms for transmitting a towing force to the main frame assembly from the towing assembly; a spindle assembly comprising a top plate and a base plate, the top plate attached to the top side of the main frame assembly and the base plate attached to the bottom side of the main frame assembly by a pivot pin; a pair of wheels, each wheel attached to a spindle assembly, the top plate of the spindle assembly extends outward from the main frame assembly to the wheel from above the top side of the main frame assembly and the base plate of the spindle assembly extends outward from the main frame assembly to the wheel from below the bottom side of the main frame assembly; a pair of tie rods, each tie rod comprising first and second ends, the first end of the tie rod connected to the spindle assembly and the second end of the tie rod connected to the swinging arm; and a support structure attached to the main frame assembly independent of the pair of swinging arms for supporting and balancing a payload, the support structure comprising side supports and a front support, the side supports are connected by at least the one front support.