Trailer dolly

Abstract

A longitudinal frame has a conventional fifth wheel on its forward end and this end of the frame is supported on caster wheels. The rearward end of the frame has a depending portion provided with hitches on each side for connection to two hitch points on the front of a towing vehicle to form a longitudinally rigid extension of the towing vehicle. With this arrangement the operator faces the dolly. The hitches on the dolly are vertically adjustable to provide easy connection to the towing vehicle and to accommodate various ground conditions during connection. The fifth wheel assembly of the dolly is supported on an auxiliary longitudinally extending frame pivotally connected at a rearward point on the main frame, and an air lift bag assembly is provided between the auxiliary frame and the main frame for raising and lowering the fifth wheel assembly. A vertically adjustable pony wheel is provided at the rear of the main frame.

Dependencies are inferred from the claim text.