Castagna trailer step assembly

Claim 1

IN A FOLDING TRAILER STEP ASSEMBLY, THE COMBINATION WHICH COMPRISES (A) SPACED PARALLEL END FRAMES INCLUDING RUNNERS HAVING UPWARDLY EXTENDED AND REARWARDLY INCLINED STRINGERS MOUNTED THEREON AND HAVING POSTS AT THE REAR CONNECTING UPPER ENDS OF THE STRINGERS TO SAID RUNNERS, (B) AN INVERTED U-SHAPED SPACING AND CONNECTOR FRAME HAVING VERTICALLY DISPOSED LEGS PARALLEL TO AND SPACED FROM SAID POSTS OF THE END FRAMES, THE UPPER ENDS OF SAID LEGS BEING CONNECTED BY A TRANSVERSELY DISPOSED ROD, (C) CLAMPS HAVING SUBSTANTIALLY OPPOSED SEMI-CIRCULAR END FORMATIONS EXTENDED AROUND AND CLAMPED ON SAID POSTS AND LEGS BY SCREWS HAVING WING NUTS THEREON PROVIDING SWIVEL CONNECTIONS BETWEEN SAID POSTS AND LEGS, (D) AN UPPER TREAD HAVING PAIRS OF DEPENDING PRALLEL FLANGES ON THE ENDS AND ALSO ON ONE SIDE, SAID FLANGES BEING POSITIONED TO RECEIVE UPPER SECTIONS OF THE END FRAMES AND ALSO THE TRANSVERSELY DISPOSED ROD OF SAID CONNECTOR FRAME, SAID PAIRS OF FLANGES CONSTITUTING CHANNEL BARS WHICH RETAIN THE END FRAMES AND CONNECTOR FRAME IN OPERATIVE POSITIONS, (E) A LOWER THREAD HAVING SLOTTED DEPENDING FLANGES AT THE ENDS, (F) T-SHAPED TREAD SUPPORTS ON INNER SURFACES OF SAID END FRAMES, MOUNTED ON SAID RUNNERS, AND POSITIONED TO RECEIVE SAID SLOTTED DEPENDING FLANGES OF SAID LOWER TREAD, THE REAR END OF ONE OF SAID END FRAMES BEING FREE TO SWING AROUND THE ADJOINING END OF THE OTHER END FRAME, AND TO A POSITION AGAINST THE OUTER SURFACE OF SAID OTHER END FRAME TO FACILITATE STORAGE AND TRANSPORTATION.