Removable protective grilled for basement window - is secured in frame by U cross section flange assembly against forcing from outside

摘要

The window assembly consists of frame (10) in which the removable element (11) is fitted. The upper horizontal frame leg (12), as well as the side legs (13) have a U-cross section with flanges pointing outwardly and on the rear surface of the base of the U-shape fitted with a strip-like projection (14) containing continuous grooves (15). The upper horizontal leg (12) has a strip projection (16) with several individual reinforcing eyelets (17) and a recess (18) to accommodate the top edge of the window frame. The bottom leg of the frame (19) has a shoulder (20) to support the bottom edge of the window part (11) and several individual projections (21) presenting a recess equal to the thickness of the window part (11).