Hitch and trailer having improved wheel suspension of the tandem type

Claim 1

A TRAILER COMPRISING: A LOAD-SUPPORTING FRAME; WHEEL SUSPENSIONS OF THE TANDEM TYPE MOUNTED UPON SAID FRAME APPROXIMATELY MIDWAY BETWEEN THE ENDS OF THE FRAME, THE FRAME BEING SUPPORTED UPON SAID SUSPENSIONS FOR LONGITUDINAL TILTING MOVEMENT BETWEEN A NORMAL LEVEL POSITION, AND AN INCLINED POSITION IN WHICH THE FRAME EXTENDS RAMPFASHION BETWEEN A TRACTION VEHICLE AND THE GROUND SURFACE; AND AN ARTICULATED HITCH MECHANISM INCLUDING A CLEVIS SUPPORT PLATE HAVING A REAR END PIVOTALLY CONNECTED TO THE FRONT END OF THE FRAME, SAID PLATE PROJECTING FORWARDLY FROM THE FRAME, A CLEVIS PIVOTED INTERMEDIATE ITS ENDS ON THE FRONT END OF SAID PLATE, SAID CLEVIS BEING ADAPTED AT ONE END FOR CONNECTION TO A TRACTION VEHICLE, AND A LINK PIVOTALLY CONNECTED TO THE OTHER END OF THE CLEVIS, SAID PLATE, CLEVIS AND LINK BEING RELATIVELY MOVABLE BETWEEN A FIRST POSITION IN WHICH THE FRONT END OF THE FRAME IS ELEVATED TO DISPOSE THE FRAME IN ITS INCLINED POSITION, AND A SECOND POSITION IN WHICH THE FRONT END OF THE FRAME IS LOWERED FOR DISPOSITION OF THE FRAME IN THE LEVEL POSITION THEREOF.