Vehicle attitude control

Claim 1

IN A VEHICLE HAVING SOURCES OF FLUID UNDER PRESSURE: A SUPPORTED FRAME AND SUSPENSION MEANS CARRIED THEREBY IN ENGAGEMENT WITH THE GROUND; SAID SUSPENSION MEANS COMPRISING WHEELS AND A PLURALITY OF POSITIONABLE HYDRAULIC MEMBERS IN FRONTWARDLY AND REARWARDLY DISPOSED DISPOSITIONS AND EACH CARRYING A WHEEL AT THE EXTREMITY; THE REARWARDLY DISPOSED MEMBERS OF SAID SUSPENSION MEANS MAINTAINING ENGAGEMENT WITH THE GROUND SO AS TO ESTABLISH A TRANSVERSE AND A LONGITUDINALLY PIVOTAL AXIS; MEANS COMPRISING A PLURALITY OF MOVABLE LEVELING VALVES PROVIDING SEPARATE FIRST CONNECTIONS BETWEEN A SOURCE OF THE FLUID AND EACH HYDRAULIC MEMBER; MOTION TRANSMITTING MEANS ENGAGING THE LEVELING VALVES AND CONNECTED TO SAID MEMBERS TO MOVE THE LEVELING VALVES, IN DIRECTIONS FOR SUPPLYING AND EXHAUSTING FLUID TO AND FROM SAID MEMBERS TO RESTORE THEM FROM DISPLACED POSITIONS OF VERTICAL MOVEMENT TO AN INTERMEDIATE UNDISPLACED POSITION, THUS AUTOMATICALLY ESTABLISHING A NEUTRAL POSITION OF THE SUPPORTED FRAME; ACCUMULATORS TO CUSHION SUCH MOVEMENT, SAID FIRST CONNECTIONS HYDRAULICALLY INTERCONNECTING SAID ACCUMULATORS AND SAID HYDRAULIC MEMBERS; MEANS COMPRISING A PLURALITY OF MANUALLY CONTROLLED SEPARATE CONNECTIONS BETWEEN A SOURCE OF THE FLUID AND THE FRONTWARDLY DISPOSED MEMBERS; AND A PLURALITY OF WHEEL VALVES IN THE CONNECTIONS BETWEEN SAID SOURCE AND THE LEVELING VALVES; EACH OF SAID WHEEL VALVES BEING MOVABLE FROM A FIRST POSITION IN THE FIRST CONNECTIONS TO A SECOND POSITION THEREIN PREVENTING THE CUSHIONING ACTION OF THE ACCUMULATORS AND BLOCKING THE LEVELING VALVES FROM SAID MEMBERS, SO AS TO ENABLE THE MANUALLY CONTROLLED CONNECTIONS TO INDEPENDENTLY SUPPLY AND EXHAUST FLUID THROUGH SAID SEPARATE CONNECTIONS TO AND FROM THE FRONTWARDLY DISPOSED MEMBERS FOR CAUSING RELATIVE MOVEMENT BETWEEN THE FRONTWARDLY DISPOSED MEMBERS AND THE FRAME IN DIRECTIONS ABOUT THE TRANSVERSE AND LONGITUDINAL PIVOTAL AXES AFORESAID.