Coupling arrangement for tandem axle semi-trailers

Claim 1

AN ARRANGEMENT FOR COUPLING TWO SEMI-TRAILERS IN TANDEM COMPRISING A FIRST SEMI-TRAILER AND A LENGTHWISE SPACED SECOND SEMI-TRAILER, SAID FIRST SEMI-TRAILER AND SAID SECOND SEMI-TRAILER EACH INCLUDING A CHASSIS AND A SUBSTANTIALLY FRAMELESS RECTANGULAR CARGO BODY DETACHABLY MOUNTED THEREON, SAID CONTAINER CARGO BODIES EACH HAVING A SET OF FORWARD CORNER BRACKETS AT THE LOWER CORNERS OF THE FRONT WALL THEREOF AND A SET OF REAR CORNER BRACKETS AT EACH OF THE LOWER CORNERS AT THE REAR CORNER BRACKETS AT FRONT CORNER BRACKETS EACH BEING A SUBSTANTIALLY BOX LIKE CONSTRUCTION HAVING AN INTERIOR CHAMBER, A FRONT CORNER BRACKET OPENING FORMED ALONG THE EXTERIOR END WALL FACE OF SAID FRONT CORNER BRACKET COMMUNICATING WITH SAID INTERIOR CHAMBER, SAID FRONT CORNER BRACKET BEING DEFINED AT THE LOWER END THEREOF WITH A RETAINING BAR, SAID REAR CORNER BRACKETS EACH BEING A BOX LIKE STRUCTURE AND HAVING AN INTERIOR CHAMBER, A REAR CORNER BRACKET OPENING ON THE EXTERIOR END WALL FACE OF SAID REAR CORNER BRACKET AND COMMUNICATING WITH SAID INTERIOR CHAMBER, A CLAMPING BAR DEFINING THE LOWER END OF SAID FRONT CORNER OPENING, SAID OPENINGS IN SAID CORNER BRACKETS BEING IN SUBSTANTIALLY TRANSVERSE AND LONGITUDINAL ALIGNMENT FOR TANDEM ATTACHMENT OF SEMI-TRAILERS; COUPLING MEANS CONNECTING SAID SEMI-TRAILERS FOR TANDEM OPERATION INCLUDING A TIE MEMBER HAVING AN ABUTMENT MEANS INSERTABLE THROUGH SAID FRONT CORNER BRACKET OPENING FOR ENGAGEMENT WITH SAID RETAINING BAR, SAID HOOK MEMBER INCLUDING A LENGTHWISE SPACED HOOK MEANS INSERTABLE THROUGH SAID REAR CORNER BRACKET OPENING AND ENGAGEABLE WITH SAID CLAMPING BAR, AND LOCKING MEANS MOVABLY DISPOSED OVER SAID HOOK MEMBER BETWEEN THE ADJACENT EXTERIOR FACES OF SAID FRONT AND REAR CORNER BRACKETS OF SAID FIRST AND SECOND SEMI-TRAILERS FOR RETAINING SAID ABUTMENT MEANS AND SAID HOOK MEANS IN ENGAGEMENT WITH SAID RETAINING BAR AND CLAMPING BAR, RESPECTIVELY.