Elevating mechanism for trailers

Claim 1

AN ELEVATING MECHANISM COMPRISING IN COMBINATION, A BASE FRAME MEANS, A PLATFORM FRAME MEANS NORMALLY POSITIONED ON SAID BASE FRAME MEANS TO REST ON THE SAME, A PAIR OF PIVOTED GUIDE STRUCTURES CONNECTING THE BASE FRAME AND PLATFORM FRAME MEANS, SAID BASE FRAME MEANS AND SAID PLATFORM FRAME MEANS HAVING LATERALLY SPACED ELONGATED SIDE RAILS RIGIDLY INTERCONNECTED BY PIVOTAL FLANGE MEANS FORMING A PART OF SAID BASE FRAME MEANS AND SAID PLATFORM FRAME MEANS TO JOURNAL THE PIVOTING EXTREMITIES OF SAID PIVOTED GUIDE STRUCTURES ON SAID PLATFORM AND BASE FRAME MEANS, SAID PIVOTAL FLANGE MEANS COMPRISING TRANSVERSELY EXTENDING CYLINDRICAL RODS SPACING THE SIDE RAILS AND PIVOTED WITH FLANGED EXTREMITIES HAVING MEANS THEREON FOR ADJUSTABLE ATTACHMENT TO THE SIDE RAILS ALONG THEIR LENGTH, THE SAID PIVOTING EXTREMITIES OF THE PIVOTED GUIDE STRUCTURES BEING HOLLOW TO SURROUND AND FREELY PIVOT ABOUT SAID RODS, MEANS FOR ELEVATING SAID PLATFORM FRAME MEANS ON SAID BASE FRAME MEANS INCLUDING A MOTIVE UNIT AND LEVER MEANS PIVOTALLY CONNECTED BETWEEN THE BASE FRAME MEANS AND THE PLATFORM FRAME MEANS, SAID MOTIVE UNIT BEING PIVOTALLY CONNECTED AT ONE EXTREMITY TO SAID BASE FRAME MEANS AND TO THE PIVOTED LEVER MEANS AT THE OTHER EXTREMITY FOR ELEVATING THE PLATFORM FRAME MEANS UPON OPERATION OF THE MOTIVE MEANS RELATIVE TO THE BASE FRAME MEANS THROUGH AN ARCUATE MOVEMENT.