Hydrauically actuated system and apparatus for compacting material with automatic compaction indicating and controlling mechanism

Claim 1

IN AN ARRANGEMENT FOR COMPACTING MATERIAL BY SONIC VIBRATIONS, SAID ARRANGEMENT COMPRISING, IN COMBINATION, STRUCTURE FOR SUPPORTING SONIC COMPACTING MEANS THEREON IN A POSITION FOR COMPACTING MATERIAL, A HYDRAULIC SYSTEM CONTAINING FLUID UNDER PRESSURE FOR POWERING SAID SONIC COMPACTING MEANS, SAID HYDRAULIC SYSTEM COMPRISING A PUMP DEVICE, CONTROL STRUCTURE FOR VARYING THE DISPLACEMENT OF THE PUMP DEVICE, FLUID PRESSURE SUPPLY CONDUIT MEANS FOR PLACING THE FLUID PRESSURE DISCHARGE OF THE PUMP DEVICE IN COMMUNICATION WITH THE SONIC COMPACTING MEANS, VALVING FOR SELECTIVELY CONTROLLING THE FLUID PRESSURE DISCHARGE OF THE PUMP DEVICE THROUGH THE FLUID PRESSURE SUPPLY CONDUIT MEANS, CONTROL CONDUIT MEANS FOR TRANSMITTING THE DEVELOPED FLUID PRESSURE OF THE DISCHARGED FLUID IN THE FLUID PRESSURE SUPPLY CONDUIT MEANS DIRECTLY BACK TO THE PUMP CONTROL STRUCTURE BY PLACING THE FLUID PRESSURE SUPPLY CONDUIT MEANS IN DIRECT COMMUNICATION WITH THE PUMP CONTROL STRUCTURE, SAID CONTROL CONDUIT MEANS EXTENDING DIRECTLY BETWEEN THE PUMP CONTROL STRUCTURE AND THE FLUID PRESSURE SUPPLY CONDUIT MEANS AT A LOCATION THEREALONG WHICH IS DOWNSTREAM FROM THE VALVING TO ENABLE THE FLUID PRESSURE WHICH IS TRANSMITTED THROUGH THE CONTROL CONDUIT MEANS TO THE PUMP CONTROL STRUCTURE TO BE EFFECTIVE TO VARYING THE FLUID PRESSURE DISCHARGE OF THE PUMP DEVICE IN DIRECT RESPONSE TO THE DEMAND WHICH HAD BEEN PLACED THEREON BY THE SONIC COMPACTING MEANS WHICH IS BEING OPERATED THEREBY.