Articulated four-wheel drive earthworking vehicle

Claim 1

A FOUR-WHEEL DRIVE EARTHMOVING VEHICLE COMPRISING (A) A FRONT FRAME, (B) A FRONT DRIVING AXLE STRUCTURE SUPPORTING SAID FRONT FRAME, (C) A REAR FRAME, (D) A REAR DRIVING AXLE STRUCTURE SUPPORTING SAID REAR FRAME, (E) MEANS INTERCONNECTING SAID REAR FRAME WITH SAID REAR DRIVING AXLE STRUCTURE WHEREBY SAID REAR AXLE STRUCTURE AND SAID REAR FRAME MAY OSCILLATE RELATIVELY ABOUT A HORIZONTAL LONGITUDINAL AXIS, (F) A POWER UNIT CARRIED ON SAID REAR FRAME, (G) TRANSMISSION MEANS SUPPORTED ON SAID REAR FRAME AND CONNECTED TO SAID POWER UNIT TO BE DRIVEN THEREBY, (H) DRIVING MEANS FROM SAID TRANSMISSION MEANS CONNECTED TO SAID DRIVING AXLE STRUCTURES, (I) HINGE MEANS POSITIONED BETWEEN SAID FRONT AND REAR FRAMES INCLUDING UPPER AND LOWER PIVOT BRACKET RESPECTIVELY ON SAID FRAMES, (J) HINGE PIN MEANS INTERCONNECTING SAID BRACKETS TO PROVIDE A VERTICAL PIVOT AXIS WHEREBY SAID FRAMES MAY BE MOVED RELATIVELY TO ANGLED POSITIONS ABOUT SAID VERTICAL PIVOT AXIS, (K) FLUID RAMS INTERCONNECTING SAID FRAMES FOR RELATIVELY MOVING SAID FRAMES ABOUT SAID VERTICAL PIVOT AXIS TO EFFECTUATE STEERING OF SAID VEHICLE, (L) A FRAME EXTENSION ON SAID FRONT FRAME EXTENDING HORIZONTALLY REARWARDLY OF SAID PIVOT AXIS, (M) AN OPERATOR STATION SUPPORTED ON SAID FRAME EXTENSION, (N) AN OPERATOR''S SEAT ON SAID STATION, SAID OPERATOR''S SEA BEING POSITIONED SUBSTANTIALLY OVER SAID HINGE MEANS AND IN ALIGNMENT WITH SAID VERTICAL PIVOT AXIS, (O) WHEREBY THE OPERATOR SEATED ON SAID SEAT IS DISPOSED OVER SAID PIVOT AXIS DURING ALL RELATIVELY ANGLED POSITIONS OF SAID FRAMES, (P) SUPPORT ARMS PIVOTALLY CARRIED ON SAID FRONT FRAME AND EXTENDING FORWARDLY WITH RESPECT THERETO, (Q) AN EARTHMOVING IMPLEMENT CONNECTED TO SAID SUPPORT ARMS TO BE RAISED AND LOWERED THEREWITH, AND (R) MEANS CONNECTED TO SAID FRONT FRAME AND SAID SUPPORT ARMS FOR RAISING AND LOWERING THE SAME.