Driving and steering assembly for wheeled vehicles

Claim 1

IN COMBINATION WITH A VEHICLE HAVING A PAIR OF DRIVE WHEELS AND A TAIL WHEEL, MECHANISM FOR DRIVING THE DRIVE WHEELS AND FOR STEERING THE VEHICLE COMPRISING: SHIFTABLE STEERING STRUCTURE; A DRIVEN SHAFT; A CONTROL UNIT FOR EACH DRIVE WHEEL RESPECTIVELY, EACH UNIT INCLUDING: A POWER TRANSMITTING SHAFT OPERABLY COUPLED WITH A CORRESPONDING DRIVE WHEEL, A FIRST PULLEY ON THE DRIVEN SHAFT, A SECOND PULLEY ON THE POWER TRANSMITTING SHAFT, EACH PULLEY HAVING A SECTION RIGID TO ITS SHAFT AND A SECTION SHIFTABLE ALONG ITS SHAFT BUT ROTATABLE THEREWITH, A BELT TRAINED AROUND THE PULLEYS BETWEEN THE SECTIONS, MEANS SPRINGLOADING THE SHIFTABLE SECTION OF THE SECOND PULLEY TOWARD ITS RIGID SECTION, AND APPARATUS COUPLED WITH THE SHIFTABLE SECTION OF THE FIRST PULLEY FOR SHIFTING THE SAME TOWRD ITS RIGID SECTION AGAINST THE ACTION OF SAID SPRING-LOADING MEANS; CONTROL STRUCTURE OPERABLY COUPLED WITH SAID STEERING STRUCTURE; MEANS OPERABLY CONNECTING SAID APPARATUSES WITH SAID CONTROL STRUCTURE FIRS HIFTING THE SHIFTABLE SECTIONS OF THE FIRST PULLEYS TOWARD THEIR RIGID SECTIONS ALTERNATELY AS THE STEERING STRUCTURE IS SHIFTED; AND MEANS OPERABLY CONNECTING SAID CONTROL STRUCTURE WITH SAID TAIL WHEEL FOR STEERING THE LATTER AS THE STEERING STRUCTURE IS SHIFTED.