Reversible drive for power tools

Claim 1

A COMPACT REVERSIBLE DRIVE UNIT FOR HAND-OPERATED POWER TOOLS COMPRISING: (A) A HOUSING HAVING SEPARATE FORWARD AND REAR PORTIONS, (B) AN INPUT SHAFT JOURNALED IN SAID REAR HOUSING PORTION, AND SUPPORTED THEREBY, (C) A DRIVING GEAR CARRIED BY SAID INPUT SHAFT AND DISPOSED WITHIN THE HOUSING, (D) AN OUTPUT SHAFT JOURNALED IN THE FORWARD HOUSING PORTION AND SUPPORTED THEREBY, SAID OUTPUT SHAFT HAVING MEANS FOR DRIVING ENGAGEMENT OF THE SHANK OF A SMALL HAND TOOL OR THE LIKE, (E) A DRIVEN GEAR CARRIED BY SAID OUTPUT SHAFT WITHIN THE HOUSING, (F) A CONTROL GEAR CARRIED BY THE REAR HOUSING PORTION, (G) SAID DRIVING GEAR, DRIVEN GEAR AND CONTROL GEAR BEING AXIALLY ALIGNED, AND (H) A PLANETARY GEAR UNIT ROTATABLY SUPPORTED WITHIN THE HOUSING, SAID UNIT COMPRISING THREE FUNCTIONALLY INTEGRAL GEARS MESHING RESPECTIVELY WITH SAID CONTROL GEAR, DRIVING GEAR AND DRIVEN GEAR, (I) SAID PLANETARY GEAR UNIT SECURED BETWEEN SAID FORWARD HOUSING PORTION AND A FACE PLATE, SAID FACE PLATE SECURED TO SAID FORWARD HOUSING PORTION AND JOURNALED ON SAID REAR HOUSING PORTION, (J) WHEREBY, WHEN THE REAR HOUSING PORTION IS HELD STATIONARY SAID PLANETARY GEAR UNIT ORBITS AROUND SAID CONTROL GEAR TO DRIVE THE OUTPUT SHAFT IN ONE DIRECTION; AND WHEN THE FORWARD HOUSING PORTION IS HELD STATIONARY, THE SAID PLANATARY GEAR UNTI ACTS AS AN IDLER BETWEEN THE DRIVING AND DRIVEN GEARS, AND THE OUTPUT SHAFT IS DRIVEN IN AN OPPOSITE DIRECTION.