Orbital finishing sander

Claim 1

A PORTABLE ORBITAL MOTION FINISHING SANDER COMPRISING A FRAME, A MOTOR FIXEDLY MOUNTED IN CENTERED RELATION ON SAID FRAME WITH ITS OUTPUT SHAFT PROTRUDING FROM ONE FACE OF SAID FRAME AND FORMING WITH SAID FRAME A STATIONARY MASS OF DETERMINABLE VALUE; A PAD ASSEMABLY CONNECTED TO SAID FRAME AT POINTS SYMMETRICALLY RELATED TO THE OUTPUT SHAFT AXIS BY FLEXIBLE CONNECTORS TO FORM A MOVABLE MASS OF DETERMINABLE VALUE ADAPTED TO BE ORBITALLY DRIVEN BY SAID OUTPUT SHAFT; AND A FLEXABLE DRIVE CONNECTION INTERCONNECTING SAID OUTPUT SHAFT AND SAID PAD ASSEMBLY CHARACTERIZED BY AN ELASTOMERIC INTERMEDIATE MEMBER HAVING ITS OPPOSITE ENDS DIRECTLY FIXEDLY CONNECTED TO THE SAID OUTPUT SHAFT AND TO AN ECCENTRICALLY WEIGHTED ROTOR MEMBER CARRIED BY A JOURNAL BEARING MOUNTED IN COAXIALLY FIXED RELATION TO THE CENTER OF SAID PAD ASSEMBLY, THE CENTER OF MASS OF SAID PAD ASSEMBLY BEING LOCATED IN A PLANE NORMAL TO THE AXIS AND MIDWAY BETWEEN THE ENDS OF SAID BEARING, SAID MOTOR HAVING AN OPERATING SPEED TO ASSURE AN OPERATION SPEED OF SAID ROTOR MEMBER IS EXCESS OF THE CRITICAL VIBRATION SPEED OF THE ORBITING PAD ASSEMBLY.