Four wheel tractor steering arrangement

Claim 1

IN A STEERING SYSTEM FOR A FOUR-WHEELED VEHICLE HAVING SAID FOUR WHEELS PIVOTALLY CARRIED ON AXLE ASSEMBLIES FOR STEERING MOVEMENT AND HAVING AN OPERATOR''S COMPARTMENT DISPOSED SUBSTANTIALLY ABOVE THE PLANE OF SAID AXLE ASSEMBLIES COMPRISING, SELECTIVELY OPERABLE STEERING MEANS CARRIED IN THE OPERATOR''S COMPARTMENT OF SAID VEHICLE INTERMEDIATE THE ENDS AND IN THE UPPER PORTION OF SAID VEHICLE FOR SELECTIVELY PROVIDING DIFFERENT COORDINATED STEERING PATTERNS OF SAID FOUR WHEELS, FIRST LINKAGE MEANS CONNECTED TO SAID SELECTIVELY OPERABLE STEERING MEANS AND EXTENDING SUBSTANTIALLY HORIZONTALLY FORWARDLY OF SAID VEHICLE, A FIRST CYLINDRICAL MEMBER PIVOTALLY CARRIED IN SAID VEHICLE FOR PIVOTAL MOVEMENT ABOUT A VERTICAL AXIS DISPOSED ADJACENT THE FORWARD WHEELS OF SAID VEHICLE, FIRST LEVERAGE MEANS FORMED ON THE UPPER END OF SAID FIRST CYLINDRICAL MEMBER AND CONNECTED TO SAID FIRST LINKAGE MEANS FOR PIVOTAL MOVEMENT OF SAID FIRST CYLINDRICAL MEMBER RESPONSIVE TO OPERATION OF SAID SELECTIVELY OPERABLE STEERING MEANS, SECOND LEVERAGE MEANS FORMED ON THE LOWER END OF SAID FIRST CYLINDRICAL MEMBER, SECOND LINKAGE MEANS CONNECTED TO SAID SECOND LEVERAGE MEANS ON THE LOWER END OF SAID FIRST CYLINDRICAL MEMBER AND EXTENDING SUBSTANTIALLY HORIZONTALLY FORWARDLY TO PIVOTAL CONNECTIONS WITH THE FORWARD WHEELS OF SAID VEHICLE FOR STEERING MOVEMENT OF SAID FORWARD WHEELS RESPONSIVE TO PIVOTAL MOVEMENTS OF SAID FIRST CYLINDRICAL MEMBER, THIRD LINKAGE MEANS CONNECTED TO SAID SELECTIVELY OPERABLE STEERING MEANS AND EXTENDING SUBSTANTIALLY HORIZONTALLY REARWARDLY OF SAID VEHICLE, A SECOND CYLINDRICAL MEMBER PIVOTALLY CARRIED IN SAID VEHICLE FOR PIVOTAL MOVEMENT ABOUT A VERTICAL AXIS ADJACENT THE REARWARD WHEELS OF SAID VEHICLE, FIRST LEVERAGE MEANS FORMED ON THE UPPER END OF SAID SECOND CYLINDRICAL MEMBER AND CONNECTED TO SAID THIRD LINKAGE MEANS FOR PIVOTAL MOVEMENT OF SAID SECOND CYLINDRICAL MEMBER RESPONSIVE TO OPERATIONS OF SAID SELECTIVELY OPERABLE STEERING MEANS, SECOND LEVERAGE MEANS FORMED ON THE LOWER END OF SAID SECOND CYLINDRICAL MEMBER, FIRST LINKAGE AND LEVERAGE MEANS CONNECTED TO SAID SECOND LEVERAGE MEANS ON THE LOWER END OF SAID SECOND CYLINDRICAL MEMBER AND EXTENDING SUBSTANTIALLY HORIZONTALLY REARWARDLY TO PIVOTAL CONNECTIONS WITH THE REARWARD WHEELS OF SAID VEHICLE FOR STEERING MOVEMENT OF SAID REARWARD WHEELS RESPONSIVE TO PIVOTAL MOVEMENTS OF SAID SECOND CYLINDRICAL MEMBER.