Vehicle with endless tracks selfelevatable relative to skids

Claim 1

IN A BELT DRIVEN VEHICLE OF THE CLASS WHICH INCLUDES AT LEAST ONE DRIVING BELT POSITIONED BETWEEN SKIDS, SKIS, WHEELS OR BELTS MOUNTED ALONG THE SIDE FACES OF A FIXED VEHICLE FRAME, DRIVING AND SUPPORTNG WHEELS FOR THE DRIVING BELT MOUNTED IN A BELT FRAME, A FLEXIBLE CONNECTING SYSTEM BETWEEN THE SAID VEHICLE FRAME AND THE SAID BELT FRAME PERMITTING THE LATTER TO ADOPT VARIOUS HEIGHT AND OBLIQUE POSITIONS RELATIVELY TO THE FORMER, THE IMPROVEMENT WHEREIN THE SAID CONNECTING SYSTEM INCLUDES AT LEAST ONE GUIDE MEANS SITUATED IN THE VEHICLE FRAME AND AT LEAST ONE CONTROL MEANS PIVOTABLY MOUNTED IN THE BELT FRAME AND COOPERATING WITH THE SAID GUIDE MEANS SO AS TO PERMIT AN ADJUSTMENT OF THE RELATIVE POSITION OF THE TWO SAID FRAMES, SAID CONNECTING SYSTEM COMPRISING BETWEEN THE BELT AND VEHICLE FRAMES A PAIR OF TRANSVERSELY EXTENDING SHAFTS SUPPORTED IN THE BELT FRAME AND PROVIDED WITH ELBOW BENT ARMS FORMING END PORTIONS, AN OBLIQUE FACE IN SAID VEHICLE FRAME GUIDE MEANS ASSOCIATED AND IN ENGAGEMENT WITH SAID ELBOW BENT ARMS, EACH SHAFT FURTHER PROVIDED WITH AN ARM EXTENDING AT RIGHT ANGLES TO THE SHAFT AXIS AND A HYDRAULIC CYLINDER AND PISTON ARRANGEMENT INTERCONNECTING THE FREE ENDS OF SAID LAST NAMED ARMS.