Patent ID: 6651724
Filing Date: 2003-11-25
Classification: E06B

Abstract:
Folding blinds for windows and doors comprising:a box, said box having two ends, a transmission spindle connected to each of said two ends of said box, two cams, wherein one of said two cams is present in each of said two ends of said box, one or more gearwheels in operation with each of said two cams, a series of slats, each of said series of slats comprising a first side and a second side, said first side having an upper longitudinal loop therein and said second side having a lower longitudinal loop therein, and three pins on each of a first end and a second end, respective wherein said three pins on said first end and said second end serve respectively as hooks for said one of said two cams present on each of said two ends of said box, a plurality of flat sections wherein each flat section has a first hook-like side and a second hook-like side, wherein said first hook-like side of said each flat section hooks said upper longitudinal loop of said first side of one of said series of slats, and said second hook-like side hooks said lower longitudinal loop of said second side of an adjacent slat, a slideway operatively positioned to each of said two cams, each said slideway bifurcating into a first arm and a second arm, said slideway housing a first pin of said three pins of said each slat, wherein said first arm is adapted to receive said first pin of a first slat of said series of slats and said second arm is adapted to receive said first pin of a slat succeeding said first slat of said series of slats, such that successive first pins of said series of slats alternate between being received in said first arm and received in said second arm of said slideway, and two helicoidal screws wherein each of said two helicoidal screws is vertically mounted in each of said two ends of said box with one end of said two screws being at a level where said first arm and said second arm of said slideway take a parallel and vertical shape to said two helicoidal screws, said two helicoidal screws being synchronized respectively with movement of said one of said two cams present in each of said two ends of said box in order to support, raise or lower horizontally positioned slats of said series of slats by hooking first pins of said slats.