Patent ID: 7223057

Claim:
A trailer and towed vehicle combination, comprising: a towed vehicle, including a vehicle frame and a plurality of driving feet for propelling the vehicle along the ground; a main trailer frame having left and right and front and rear sides; a towing tongue supported by said main trailer frame for connecting the main trailer frame to a towing vehicle; at least one trailer wheel mounted on said main trailer frame for supporting and carrying the main trailer frame along the ground, said trailer wheel having an axis of rotation; wherein said main trailer frame defines an opening between said left and right sides which extends to the ground from said rear side to a point forward of said axis of rotation; a carrier supported on said main trailer frame at least when the vehicle is supported on the trailer; and means for moving said vehicle up and down relative to said main trailer frame from a lowered position to a raised position, wherein said carrier includes lifting points which, when the vehicle is in the raised position, support the vehicle off of the ground, and wherein, when the vehicle is in the lowered position, at least a portion of said vehicle is in said opening and at least one of the driving feet contacts the ground; and a connector which secures the towed vehicle to one of said main trailer frame and said carrier while the vehicle is inside the trailer in the lowered position with at least one of the driving feet extending to the ground, so that the towed vehicle can drive the trailer along the ground.