US Patent 9022091 Impact window assembly for overhead door

Overhead door panels are used in a variety of overhead doors styles and construction designs, each of which may be of different panel thicknesses and construction. Each of the panels includes a window opening to receive a window assembly therein. Window frame sub-assemblies are substantially interchangeable with one another and may be used in the variety of overhead door panel construction styles. Each window frame sub-assembly may include a front frame to be installed in the window opening. Glazing elements are mounted within each of the front frames and fasteners secure the glazing element to the front frame. Retainers may be juxtaposed to the back face of the door panels and coupled to one of the window frame sub-assemblies to thereby provide a window in the respective first or second overhead door panels. Advantageous features of this invention include the window frame sub-assemblies being interchangeable in a variety of overhead door panel designs irrespective of the thickness or construction of the door panel being a pan or fully insulated sandwich door construction.