Soil penetration and friction resistance measuring apparatus

Claim 1

A TEST PILE, COMPRISING IN COMBINATION A MAIN DRIVING BODY OF SUBSTANTIALLY STANDARD PILE DIMENSIONS, SAID BODY HAVING AN UPPER END ADAPTED TO RECEIVE THE BLOWS OF A PILE DRIVER AND A LOWER EXTENSION OF REDUCED DIAMETER, THE LOWER END OF SAID EXTENSION CARRYING A TEST ASSEMBLY COMPRISING A HOUSING PORTION, AND A CYLINDRICAL FOOT EXTENDING AXIALLY FROM THE HOUSING PORTION, A SLEEVE SLIDABLY MOUNTED ON THE FOOT FOR LIMITED AXIAL MOVEMENT RELATIVE THERETO, A CONE MOUNTED FOR SLIDABLE MOVEMENT ON THE LOWER END OF SAID SLEEVE, HYDRAULIC MEANS IN SAID HOUSING POSITION FOR URGING SAID CONE AXIALLY OF SAID SLEEVE THROUGH A GIVEN STROKE AND FOR URGING SAID SLEEVE AXIALLY ALONG SAID FOOT THROUGH A GIVEN STROKE, HYDRAULIC COMMUNICATIONS EXTENDING FROM A SOURCE OF HYDRAULIC PRESSURE THROUGH SAID PILE BODY TO SAID HYDRAULIC MEANS, AND MEANS EXTERNAL TO THE PILE AND CONNECTED TO SAID HYDRAULIC COMMUNICATIONS FOR MEASURING THE RESISTANCE EXERTED BY SAID CONE THROUGHOUT THE CONE STROKE AND BY THE CONE AND SLEEVE THROUGHOUT THE SLEEVE STROKE.