Patent ID: 8132999

Claim:
A dolly for enabling a disabled semi-trailer in which a portion of its floor is structurally breached to be towed by a semi-tractor, the semi-trailer having a set of rear wheels and a front fifth wheel assembly, the dolly comprising: a wheeled cart which includes a frame assembly and a pair of axles mechanically coupled to said frame assembly for rotatably carrying wheel assemblies for providing rolling support for the wheeled cart; a removable saddle carried on top of said wheeled cart, said saddle including a frame formed to support the width of a semi-trailer when said saddle is carried by said wheeled cart, said saddle including a plurality of vertical adjustment bars for locking the height of the saddle with respect to the wheeled cart, an attachment mechanism for removably attaching said removable saddle to said frame of said wheeled cart; and a lifting mechanism disposed between said frame of said wheeled cart and said saddle for selectively varying the height of the saddle relative to the wheeled cart to a height in order to enable said wheeled cart and saddle to be disposed underneath the floor of a semi-trailer and enable said breached portion of the floor of said semi-trailer to be raised when said wheeled cart and saddle are disposed underneath said semi-trailer, said wheeled cart and said saddle forming a dolly that is formed to enable said semi-trailer and the dolly to be transported by a semi-tractor when said saddle is in engagement with the underside of a semi-trailer and carried by said wheeled cart, wherein said wheeled cart is formed to enable it to be disposed underneath said portion of the semi-trailer that is structurally breached between said rear wheels and said fifth wheel assembly and wherein said lifting mechanism enables said breached floor to be returned to its original height so that the saddle supports the breached portion of the floor across the width of the trailer so that the disabled semi-trailer can be towed by a semi-tractor in a conventional manner while being supported by the fifth wheel assembly, the set of rear wheels with the wheeled cart providing rolling support under the breached portion of the floor of the trailer.