Patent ID: 7073766
Filing Date: 2006-07-11
Classification: E04G

Abstract:
1. Formwork system for forming concrete bodies of a wall with recesses having a recess surface, the wall having an inner and an outer surface, the system comprising: first formwork with an opening; second formwork whereby one of said formworks is an inner formwork to form the inner surface of the wall and another is an outer formwork to form the outer surface of the wall; an opening box-out disposed between the first formwork and the second formwork, the opening box-out being connected at one end thereof to the second formwork, the opening box-out including a rigid inner frame and adjustable frame sections surrounding the rigid inner frame and coupled thereto by pivotable guide bars whereby the opening box-out provides a movable outer contour to form the recess surface for increasing and decreasing a size of the opening box-out as far as it abutts upon an inner periphery of the opening of the first formwork; said moveable outer contour comprising frame sections and interconnecting corner formwork elements, the frame sections being moveably hinged to an outer periphery of the inner frame; means for moving the frame sections in order to increase and reduce the opening box-out size, the frame sections forming an outer frame pressable to an edge of the opening of the first formwork; and distance collars disposed on an inner side of one of the inner and outer formworks for mounting of the opening box-out.