Cargo carrier

Claim 1

A CARGO CARRIER FOR USE WITH A WHEELED TRACTOR COMPRISING A UNITARY LOAD CARRYING PLATFORM, A FIRST, FORWARD, WHEELED UNDERCARRIAGE, A SECOND, REARWARD, WHEELED UNDECARRIAGE, FIFTH WHEEL STRUCTURE PROVIDING A CONNECTION BETWEEN SAID PLATFORM AND SAID FIRST UNDERCARRIAGE INCLUDING A PIVOT MEANS FOR ACCOMODATING PIVOTAL MOTION OF SAID FIRST UNDERCARRIAGE ABOUT A TRANSVERSE AXIS RELATIVE TO SAID PLATFORM, SAID FIFTH WHEEL STRUCTURE ACCOMODATING RELATIVE ANGULAR MOTION BETWEEN THE LONGITUDINAL CENTER LINES OF SAID PLATFORM AND SAID FIRST UNDERCARRIAGE, A PIVOTAL CONNECTION BETWEEN SAID SECOND UNDERCARRIAGE AND SAID PLATFORM, SAID LAST NAMED PIVOTAL CONNECTION ACCOMMODATING ANGULAR MOVEMENT OF SAID SECOND UNDERCARRIAGE ABOUT A TRANSVERSE AXIS RELATIVE TO SAID PLATFORM, SAID FIRST UNDERCARRIAGE INCLUDING FRAME STRUCTURE COMPRISING LONGITUDINALLY EXTENDING SIDE RAILS, ROAD ENGAGING WHEELS SUSPENDED AT THE REARWARD PORTION OF SAID SIDE RAILS, SECOND FIFTH WHEEL STRUCTURE FOR PROVIDING A PIVOTAL CONNECTION BETWEEN THE FORWARD PORTION OF SAID FIRST UNDERCARRIAGE SIDE RAIL MEMBERS AND A WHEELED TRACTOR, SAID SECOND UNDERCARRIAGE COMPRISING AN INNER FRAME STRUCTURE FIXEDLY SECURED TO SAID PLATFORM, AN OUTER FRAME STRUCTURE INCLUDING SIDE RAILS DISPOSED ON EITHER TRANSVERSE SIDE OF SAID INNER FRAME STRUCTURE, THE ROAD ENGAGING WHEELS OF SAID SECOND UNDERCARRIAGE BEING SUSPENDED ON SAID OUTER FRAME STRUCTURE, A PIVOTAL CONNECTION BETWEEN SAID INNER AND OUTER FRAME STRUCTURES AT A LOCATION INTERMEDIATE THE ROAD ENGAGING WHEELS THEREOF, AND GUIDE MEANS DEFINED IN PART BY SAID INNER FRAME STRUCTURE FOR PERMITTING RELATIVE ANGULAR MOTION BETWEEN SAID INNER AND OUTER FRAME STRUCTURES WITHOUT INTERFERENCE THEREBETWEEN.