Reversible tool driving attachment

Claim 1

A HAND-HELD REVERSIBLE DRIVE COUPLING COMPRISING: FIRST AND SECOND BODY PORTIONS OF SUBSTANTIALLY EQUAL CROSS SECTION CONNECTED IN AXIAL ALIGNMENT AND IN END TO END RELATION FOR ROTATION RELATIVE TO EACH OTHER, FIRST END SECOND SHAFT MEANS ROTATABLY MOUNTED IN SAID FIRST AND SECOND BODY PORTIONS RESPECTIVELY, EACH OF SAID SHAFT MEANS HAVING ONE END EXTENDING BEYOND THE SAID BODY PORTION ASSOCIATED THEREWITH, THE OTHER ENDS OF SAID SHAFT MEANS BEING CONNECTED FOR RELATIVE ROTATION, A FIRST SUN GEAR ATTACHED TO THE OTHER END OF SAID FIRST SHAFT MEANS, A FIRST SET OF PLANET GEARS ROTATABLY MOUNTED IN SAID FIRST BODY PORTION AND MESHING WITH SAID FIRST SUN GEAR, A FIRST RING GEAR ON SAID SECOND BODY PORTION MESHING WITH SAID FIRST SET, AN ANNULAR EXTENSION HAVING A SECOND RING GEAR ATTACHED TO SAID FIRST BODY PORTION AND EXTENDING INTO THE INTERIOR OF SAID SECOND BODY PORTION, A SECOND SUN GEAR SECURED TO SAID SECOND BODY PORTION, A SECOND SET OF PLANET GEARS ROTATABLY ATTACHED TO SAID OTHER END OF SAID SECOND SHAFT MEANS AND MESHING WITH SAID SECOND RING AND SAID SECOND SUN GEARS, AND A TOOL CHUCK ATTACHED TO ONE OF SAID SHAFT MEANS AND THE OTHER OF SAID SHAFT MEANS BEING ADAPTED FOR CONNECTION WITH A UNIDIRECTIONAL SOURCE OF POWER, WHEREBY THE DIRECTION OF ROTATION OF SAID CHUCK MEANS IS DETERMINED BY SELECTIVE HOLDING ONE OF SAID FIRST AND SECOND BODY PORTIONS.