Patent ID: 6860345
Filing Date: 2005-03-01
Classification: B62D,B64D,B64F,B66F

Abstract:
1. A tow tractor and trailer combination comprising tractor having a tractor frame having a top side, and with an outer tractor rail which is secured radially outwardly to said tractor and which is in the shape of a circle defined about a vertical axis through said tractor frame, said tractor having no apparatus mounted on the top side of said tractor frame which extends beyond the circular radius of said outer tractor rail, first and second drive wheels coupled to said frame, each of said drive wheels capable of powered rotation about a horizontal axis that intersects said vertical axis, each of said drive wheels capable of forward and rearward rotation about said horizontal axis, at least one castor mounted to said frame for supporting said frame on the ground by at least said first and second drive wheels and said castor, and a tractor trolley rotatably supported on said tractor rail and including a tractor hitch for coupling to a first pull bar, said tow tractor having a power source mounted on said tractor frame and being arranged and designed when powered by said power source to spin about said vertical axis with no apparatus mounted on said tractor frame extending outwardly beyond said circular radius, and a trailer having a trailer frame with an outer trailer rail which is in the shape of a circle defined about a vertical axis through said trailer frame, first and second main trailer wheels coupled to said trailer frame, each of said main trailer wheels mounted for rotation about a horizontal axis that intersects said vertical axis through said trailer frame, at least one castor mounted to said trailer frame for supporting said frame on the ground by at least said first and second main wheels of said trailer and said castor, a trailer trolley rotatably supported on said trailer rail and including a trailer hitch for coupling to a second pull bar, said first pull bar being connected between said tractor hitch and said trailer frame.