Collapsible trailer

Claim 1

FOR USE IN A WHEELED TRAILER HAVING AN OPEN TOP BODY INCLUDING A FLOOR AND OPPOSED FRONT AND REAR END WALLS AND OPPOSED SIDE WALLS UPSTANDING THEREFROM, A RIGID ROOF, FOLDABLE SIDE CLOSURE STRUCTURE CONNECTED BETWEEN THE ROOF AND THE BODY, AND RETRACTABLE CORNER SUPPORTS FOR HOLDING THE ROOF SPACED VERTICALLY ABOVE THE BODY WITH THE SIDE CLOSURE STRUCTURE EXTENDED THEREBETWEEN WHEN THE TRAILER IS OPENED AND FOR LOWERING THE ROOF AGAINST THE BODY WHEN THE TRAILER IS CLOSE,D THE IMPROVEMENT COMPRISING THE COMBINATION OF OPPOSING ELONGATED SUPPORT RAILS ON THE SIDE WALLS, A BED FRAME EXTENDING BETWEEN AND BEING SUPPORTED BY THE SUPPORT RAILS, SAID SUPPORT RAILS BEING LOCATED NEAR THE UPPER EDGES OF THE SIDE WALLS ABOVE THE LEVEL OF THE ADJACENT END WALL TO PROVIDE THAT THE BED FRAME CAN BE MOVED ALONG THE BED SUPPORTS TO EXTEND OVER THE ADJACENT END WALL WHEN THE TRAILER IS OPENED AND CAN BE MOVED TO ENTIRELY BETWEEN THE SIDE WALLS WHEN THE TRAILER IS CLOSED, SAID SUPPORT RAILS FURTHER BEING SPACED FROM THE ADJACENT END WALL DISTANCES SLIGHTLY IN EXCESS OF THE CORNER SUPPORTS TO PROVIDE THAT THE CORNER SUPPORTS ARE DISPOSED BETWEEN THE ADJACENT END WALL AND THE BED FRAME IN THE TRAILER CLOSED POSITION, EACH OF THE CORNER SUPPORTS INCLUDING A PAIF OF POSTS HAVING CONNECTIONS AT THEIR REMOTE ENDS, RESPECTIVELY, RELATIVE TO THE ROOF AND THE BODY, AND HAVING CONNECTIONS NEAR THEIR ADJACENT ENDS RELATIVE TO EACH OTHER, AND ALL THESE CONNECTIONS BEING PIVOTAL ABOUT AXES THAT EXTEND LONGITUDINALLY OF THE TRAILER BODY TO PERMIT INWARD AND OUTWARD ARTICULATION OF THE POSTS BETWEEN THE OPENED AND CLOSED POSITIONS OF THE TRAILER.