US Patent 10099577 Quick adjust power adjuster with split nut

A power adjuster for adjusting an upper track relative to a lower track of a seat track assembly. An elongated lead screw extends axially between opposite fore and aft ends and is fixedly secured to the lower track. A driven assembly is selectively coupled to the lead screw for axial travel along the lead screw between the fore and aft ends. A drive assembly is fixedly coupled to the upper track and operatively coupled to the driven assembly for selectively rotating the driven assembly in opposite first and second directions for axial travel along the lead screw in a power operation mode. A release mechanism is coupled to the upper track and operable between a locked condition.