Overhead service unit

Claim 1

AN OVERHEAD SERVICE VEHICLE, COMPRISING A MOBILE BASE MOUNTED ON REAR DRIVE WHEELS AND FRONT STEERABLE WHEELS AND COMPACT CONFIGURATION AND LOW HEIGHT LESS THAN OF THE ORDER OF 2 FEET, A TURNTABLE ROTATABLY MOUNTED ON THE BASE BETWEEN THE WHEELS AND HAVING A PORTION EXTENDING BELOW THE TOPS THEREOF, SAID TURNTABLE BEING ROTATABLE ON THE BASE THROUGH 360* OF CONTINOUS MOVEMENT IN EITHER DIRECTION ABOUT A CENTRAL VERTICAL AXIS, A MAST FIXED IN UPSTANDING POSITION ON THE TURNTABLE AND EXTENDING UPWEARD RELATIVE TO AND ABOVE THE BASE, SAID MAST HAVING A PREDETERMINED CLEARANCE HEIGHT FOR PASSAGE UPRIGHT THROUGH DOORWAYS OF PREDETERMINED HEIGHT, A PLATFORM MOUNTED ON THE UPRIGHT MAST FOR UP AND DOWN MOVEMENT THEREON AND EXTENDING OUTWARD FROM ONE SIDE OF THE MAST AND RADIALLY OF SAID CENTRAL TURNTABLE AXIS AND BEYOND THE TURNTABLE, THE PLATFORM HAVING A LENGTH TO EXTEND A SUBSTANTIAL DISTANCE BEYOND THE SIDES OF THE BASE AND TO EXTEND BEYOND AT LEAST ONE END OF THE BASE WHEN SWUNG WITH THE TURNTABLE ABOUT SAID CENTRAL AXIS, SAID PLATFORM HAVING A LOWERED POSITION CLOSELY ABOVE THE LOW BASE TO PERMIT A WORKMAN TO MOUNT THE PLATFORM FROM THE FLOOR AND TO WORK THEREON AT LEVELS SUBSTANTIALLY CONTIGUOUS WITH THOSE WHICH THE WORKMAN CAN REACH FROM THE FLOOR, AND BEING POSITIONABLE UP AND DOWN ALONG THE MAST BETWEEN SUCH LOWERED POSITION AND A TOP POSITION SUBSTANTIALLY AT THE TOP OF THE MAST, SAID PLATFORM BEING SWINGABLE WITH THE TURNTABLE THROUGH 360* OF CONTINUOUS MOVEMENT IN EITHER DIRECTION ABOUT THE CENTRAL TURNTABLE AXIS AT ALL LEVELS BETWEEN ITS SAID LOWERED POSITION AND ITS SAID TOP POSITION, WHEREBY TO GIVE WORKING ACCESS TO A FULL CIRCULAR AREA AT ALL LEVELS OF THE PLATFORM, DRIVE MOTOR MEANS IN THE BASE DRIVINGLY CONNECTED TO THE DRIVE WHEELS, SWIVEL AND LIFT MOTOR MEANS ON THE TURNTABLE OPERATIVELY CONNECTED FOR ROTATING THE TURNTABLE ON THE BASE AND RAISING THE PLATFORM ON THE MAST, SELF-CONTAINED ELECTRIC SUPPLY MEANS FOR ENERGIZING SAID MOTOR MEANS AND MOUNTED ON THE TURNTABLE FOR ROTATION THEREWITH AS COUNTERBALANCE MEANS FOR THE PLATFORM, MEANS TO CONNECT THE TURN-TABLE MOUNTED ELECTRIC SUPPLY MEANS TO THE BASEMOUNTED DRIVE MOTORS, CONTROL MEANS ON THE PLATFORM FOR CONTROLING SAID SWIVEL AND LIFT MOTOR MEANS, DRIVE CONTROL MEANS OPERABLE FROM THE PLATFORM IN LOWERED POSITION FOR ENERGIZING THE DRIVE MOTORS FROM THE ELECTRIC SUPPLY MEANS, AND STEERING MEANS OPERABLE FROM THE PLATFORM IN A LOWERED POSITION FOR STEERING SAID FRONT WHEELS, WHEREBY A WORKMAN CAN MOUNT THE PLATFORM FROM THE FLOOR AND WHILE REMAINING THEREON CAN DRIVE THE VEHICLE THROUGH DOOR- AND PASSAGE-WAYS TO WORK LOCATIONS AND CAN LIFT THE PLATFORM AND ROTATE THE TURNTABLE AND PLATFORM TO POSITION HIMSELF FOR WORK AT ALL LEVELS OF THE PLATFORM OVER A FULL CIRCULAR AREA AT EACH SUCH LOCATION.