Sonic pile driver

Claim 1

A SONIC DRIVER FOR A PILE OR THE LIKE, COMPRISING: A SONIC OSCILLATOR EMBODYING A RELATIVELY MASSIVE BODY MEANS FOR COUPLING SAID OSCILLATOR BODY TO A PILE OR THE LIKE TO BE DRIVEN; SAID OSCILLATOR BODY HAVING THEREIN A CYLINDRICAL RACEWAY HAVING A CENTRAL LONGITUDINAL AXIS CONTAINED IN A PLANE PREPENICULAR TO THE AXIS OF THE PILE; AN INERTIA ROLLER OF LESS MASS THAN SAID BODY IN AND ADAPTED TO ROLL AROUND SAID RACEWAY IN AN ORBITAL PATH, SID ROLLER HAVING A CO-AXIAL RACEWAY THEREIN; A SMALLER ROLLER IN SAID RACEWAY IN SAID FIRST MENTIONED ROLLER ADAPTED TO ROLL THEREAROUND IN AN ORBITAL PATH AND TO THEREBY ROLL SAID FIRST MENTIONED ROLLER IN ITS ORBITAL PATH AROUND SAID FIRST MENTIONED RACEWAY; A ROTATABLE ARM MOUNTED AT ONE END ON SAID BODY FOR ROTATION ABOUT AN AXIS CO-AXIAL WITH SAID RACEWAY IN SAID BODY; A PIN PARALLEL TO THE AXIS OF ROTATION OF SAID ARM CARRIED BY THE FREE SWINGING END OF SAID ARM; AND AN ECCENTRIC BUSHING ON SAID PINE MOUNTING SAID SECOND MENTIONED ROLLER FOR ROTATION ON ITS AXIS.