Vehicle auxiliary hydraulic creeper drive

Claim 1

AN AUXILIARY DRIVE UNIT FOR USE IN CONJUNCTION WITH A VEHICLE HAVING AN ENGINE, A DRIVE SHAFT CONNECTED THERETO FOR ACTUATION THEREBY, A DRIVE AXLE, A DRIVEN SHAFT CONNECTED TO SAID DRIVE AXLE TO ACTUATE THE SAME, A POWER TAKE-OFF UNIT INCLUDING A POWER TAKE-OFF SHAFT, AND A FIRST CLUTCH SELECTIVELY CONNECTING SAID DRIVE SHAFT EITHER WITH SAID DRIVEN SHAFT OR WITH SAID POWER TAKE-OFF UNIT TO DRIVE SAID POWER TAKE-OFF SHAFT, THE AUXILIARY DRIVE UNIT INCLUDING, AN AUXILIARY DRIVE SHAFT, A SECOND CLUTCH FOR SELECTIVELY ENGAGING OR DISENGAGING SAID AUXILIARY DRIVE SHAFT AND SAID DRIVEN SHAFT WHEN, AND ONLY WHEN, SAID FIRST CLUTCH IS CONNECTING SAID DRIVE SHAFT TO SAID POWER TAKE-OFF UNIT, A HYDRAULIC PUMP CONNECTED TO SAID POWER TAKE-OFF SHAFT, A HYDRAULIC MOTOR CONNECTED TO SAID AUXILIARY DRIVE SHAFT FOR DRIVING THE SAME, A FLUID CIRCUIT CONNECTING SAID PUMP AND SAID HYDRAULIC MOTOR WHEREBY FLUID FROM SAID PUMP MAY ROTATE SAID FLUID MOTOR.