Implement supporting structure

Claim 1

A TRACTOR MOUNTABLE SUPPORTING STAND FOR AN IMPLEMENT COMPRISING: AN UPRIGHT STRUCTURE NORMALLY DISPOSED AT ONE END OF A TRACTOR TRANSVERSELY TO THE LINE OF TRAVEL AND EXTENDING TO OPPOSITE TRANSVERSELY SPACED ENDS NORMALLY BEYOND THE TRANSVERSE EXPANSE OF THE TRACTOR, THE STRUCTURE BEING COMPOSED OF UPPER AND LOWER SPACED APART TRANSVERSE BEAMS INTERCONNECTED BY FRONMT AND REAR UPRIGHT SIDES, REAR MOUNTING MEANS ON THE STRUCTURE ADAPTED FOR CONNECTION TO AND SUPPORT OAN THE TRACTOR; STRUCTURE BENEATH THE LOWER BEAM CENTRALLY LOCATED BETWEEN THE ENDS OF THE UPRIGHT STRUCTURE AND DEFINING FORE-AND-AFT EXTENDNG PIVOT MEANS; A PAIR OF TRANSVERSELY EXTENDING STABILIZING LEGS SUPPORTED ON THE PIVOT MEANS OUTWARDLY BENEATH THE LOWER BEAM FROM THE PIVOT MEANS AND EXTENDING RESPECTIVELY TO OUTER ENDS ADJACENT RESPECTIVELY THE OUTER ENDS OF THE UPRIGHT STRUCTURE, EACH OF THE LEGS BEING EXTENSIBLE AND RETRACTABLE WHEREBY THEIR OUTER ENDS MAY BE POSITIONED TO VARIOUS TRANSVERSE POSITIONS INBOARD AND OUTBOARD OF THE ENDS OF THE UPRIGHT STRUCTURE; GROUND-ENGAGING ELEMENTS ON EACH OF THE OUTER ENDS OF THE LEGS; A PAIR OF VERTICALLY DISPOSED EXTENSIBLE AND RETRACTABLE HYDRAULIC UNITS SUPPORTED ON THE UPRIGHT STRUCTURE REARWARD OF THE REAR SIDE AND HAVING LOWER ENDS CONNECTED TO THE RESPECTIVE STABILIZER LEGS WHEREBY THE LATTER MAY BE RAISED AND LOWERED THROUGH EXTENSION AND RETRACTION; MEANS PROVIDING PARALLEL UPPER AND LOWER C-SHAPED TRANSVERSE CHANNELS EXTENDING SUBSTANTIALLY THE TRANSVERSE LENGTH OF THE UPRIGHT STRUCTURE WITH THE CHANNELS OPENING FORWARDLY AND HAVING OVERHANGING UPPER AND LOWER LIPS WITH OPPOSED EDGES AND DEFINING UPPER AND LOWER SLOTS RESPECTIVELY; TRANSVERSELY MOVABLE BLOCK STRUCTURES RETAINED WHITHIN THE CHAMBERS ADJUSTABLE TO FRICTIONALLY ENGAGE THE WALLS OF THE CHAMBER; AND FORWARDLY PROJECTING IMPLEMENT CONNECTING ELEMENTS PROJECTING FROM THE BLOCKS AND THROUGH THE RESPECTIVE SLOTS.