US Patent 9038317 Residential window power actuator

A power actuator for a window in a building includes a drive unit, a cable system, and a controller. The drive unit is positioned within a sill of the window. The cable system is engagable with the drive unit for moving a pane of the window relative to a window frame between an opened position and a closed position. The controller is electrically coupled to the drive unit and a power outlet located in the building and connected to an external power grid.