Power seat adjuster

Claim 1

SEAT ADJUSTING APPARATUS FOR A SEAT SLIDABLE FORE AND AFT AND HAVING ITS FRONT AND REAR EDGES INDENDENTLY VERTICALLY ADJUSTABLE, COMPRISING A HOUSING HAVING THREE WORM SHAFTS MOUNTED THEREIN FOR ROTATION ON FIXED AXES DISPOSED TRANSVERSELY OF THE SEAT, WORMS ON SAID SHAFTS A PAIR OF SCREW SHAFTS DISPOSED IN SUBSTANTIAL AXIAL ALIGNMENT AND EXTENDING FORE AND AFT OF THE SEAT, A WORM GEAR ON EACH OF SAID SCREW SHAFTS IN MESH WITH ONE OF SAID WORMS, A PIVOT MOUNTING FOR EACH OF SAID SCREW SHAFTS PROVIDING FOR LIMITED ROCKING MOVEMENT THEREOF ABOUT AN AXIS PERPENDICULAR TO AND INTERSECTING THE AXIS OF THE WORM GEAR CARRIED THEREBY AND INTERMEDIATE THE ENDS OF SAID WORM GEAR, A NUT ON EACH OF SAID SCREW SHAFTS, SEAT HEIGHT ADJUSTING MECHANISM CONNECTED TO SAID NUTS AND REQUIRING LIMITED SWINGING MOVEMENT OF SAID SHAFTS UPON OPERATION OF THE HEIGHT ADJUSTING MECHANISM, A THIRD SCREW SHAFT JOURNALLED IN SAID HOUSING A THIRD NUT ON SAID THIRD SHAFT, AND MEANS FOR CONNECTING SAID HOUSING AND THIRD NUT INTERMEDIATE THE SEAT AND A STATIONARY SUPPORT TO PROVIDE FOR FORE AND AFT SEAT ADJUSTMENT.