Elevating shelf for stock bin servicing truck

Claim 1

AN ELEVATING SHELF SERVICING TRUCK COMPRISING A SELFPROPELLED, STEERABLE, WHEELED CHASSIS, AN ELEVATOR MAST AT ONE END THEREOF, AN ELEVATOR FRAME MOUNTED ON THE MAST FOR MOVEMENT TO RAISED AND LOWERED POSITIONS RELATIVE TO THE CHASSIS, SAID ELEVATOR FRAME HAVING OEN OF ITS ENDS CONNECTED TO THE MAST, SAID ELEVATOR FRAME EXTENDING FROM SAID MAST TOWARD THE OPPOSITE END OF THE CHASSIS AND TERMINATING AT ITS OTHER END NEAR SAID OPPOSITE END OF THE CHASSIS, AN OPERATOR''S PLATFORM CARRIED BY THE ELEVATOR FRAME AT SAID OTHER END OF THE CHASSIS, PROPELLING POWER MEANS INCLUDING A PRIME MOVER AND A POWER SOURCE FOR PROPELLING THE CHASSIS, SAID PROPELLING POWER MEANS BEING DISPOSED ON THE CHASSIS BETWEEN THE MAST AND OPPOSITE END OF THE CHASSIS, LIFTING POWER MEANS FOR RAISING AND LOWERING THE ELEVATOR PLATFORM, CONTROL MEANS INCLUDING MANUALLY OPERABLE CONTROL ELEMENTS FOR CONTROLLING THE LIFTING POWER MEANS AND THE PROPELLING POWER MEANS, STEERING MEANS FOR STEERING THE CHASSIS, SAID CONTROL ELEMENTS AND STEERING MEANS BEING CARRIED BY THE ELEVATOR FRAME FOR LIFTING AND LOWERING THEREWITH IN A POSITION ACCESSIBLE TO AN OPERATOR ON THE PLATFORM IN RAISED AND LOWERED POSITIONS OF THE ELEVATOR FRAME, SAID CONTROL ELEMENTS BEING OPERABLE IN SAID RAISED AND LOWERED POSITIONS OF THE ELEVATOR FRAME, A SERVICE SHELF CARRIED BY THE ELEVATOR FRAME, SAID SHELF BEING DISPOSED BETWEEN SAID MAST AND PLATFORM AND BEING IN OVERLYING RELATION TO THE PROPELLING POWER MEANS WHEN THE ELEVATOR FRAME IS IN LOWERED POSITION, AND SAID OPERATOR''S PLATFORM BEING OFFSET, ENDWISE OF THE CHASSIS IN A DIRECTION AWAY FROM THE MAST, FROM THE SHELF AND PROPELLING POWER MEANS, AND POSITIONED BELOW THE UPPER LEVEL OF THE SHELF AND PROPELLING POWER MEANS A DISTANCE SUCH THAT WHEN THE ELEVATOR FRAME IS IN LOWERED POSITION, THE OPERATOR''S PLATFORM IS BELOW THE LEVEL OF THE TOP OF THE PROPELLING POWER MEANS AND NEAR TO THE GROUND LEVEL.