Attachment steering apparatus for towable vehicles

Claim 1

IN A SELF-PROPELLED VEHICLE HAVING A CHASSIS INCLUDING A TRANSVERSE MEMBER AT ONE END THEREOF, MEANS FOR SELF-PROPELLING THE VEHICLE, A PAIR OF SPACED-APART PIVOTABLE WHEELS MOUNTED TO THE CHASSIS ONE END, AND WHEEL PIVOTING MEANS COMPRISING A PIVOTED AXLE FOR EACH OF THE WHEELS, ARM MEANS EXTENDING FROM THE CHASSIS AND PIVOTABLY MOUNTING THE AXLE, AN ELONGATED TONGUE MEMBER HINGED AT ONE END TO THE CHASSIS TRANSVERSE MEMBER CENTRALLY OF THE WHEELS AND ADAPTED AT ITS OTHER END FOR CONNECTION TO MEANS FOR TOWING THE VEHICLE, AND LINK MEANS PIVOTABLY CONNECTED BETWEEN THE TONGUE MEMBER AND EACH PIVOTABLE WHEEL; THE IMPROVEMENT RESIDING IN ATTACHMENT APPARATUS FOR STEERING OF THE VEHICLE IN SELF-PROPELLED TRAVEL WHICH IS COMPATIBLE WITH AND DISCONNECTIBLE FROM THE WHEEL PIVOTING MEANS FOR MANEUVERING THE VEHICLE INDEPENDENTLY OF THE ATTACHMENT APPARATUS WHEN THE VEHICLE IS TOWED, THE ATTACHMENT APPARATUS COMPRISING A LINK ARM PIVOTED TO THE CHASSIS COAXIALLY OF THE TONGUE