Patent ID: 7748972
Filing Date: 2010-07-06
Classification: A23L,B28B,B65B,E04G

Abstract:
1. Tensioning installation for frameworks of pre-tensioned architectural elements, the tensioning installation being adapted for two-way pre-tensioning of concrete or mortar plates, comprising a molding assembly having a flat molding plate and adjustably positioned side walls extending about and limiting a perimeter of said flat molding plate, the molding assembly being supported by a support platform having a perimeter area surrounding the molding assembly, and wherein a plurality of hydraulic tensioning devices is provided in said perimeter area in engagement with said support platform, the hydraulic tensioning devices being arranged in juxtaposition in opposite facing pairs thereof across the molding plate, each of the opposite facing pairs having a filiform element extending therebetween, with the filiform elements being arranged in rectilinear alignment so as to form a grid, each hydraulic tensioning device having a fixed portion mounted on said support platform and a mobile portion engaged with one end of the corresponding filiform element, the hydraulic tensioning devices being serially connected together to form a hydraulic circuit, with the hydraulic circuit being connected to a hydraulic pressure source at a connection point, the mobile portions of the hydraulic tensioning devices being configured to be responsive to application of hydraulic pressure to the hydraulic circuit to extend from the respective fixed portions and away from the molding plate to exert a tension on the filiform elements extending between each of the opposite facing pairs.