ES187781U - Improved roller shutter (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improved roller shutter, consisting of a roller, extended by both bases coaxially with it, in separate trunnions to ensure its free rotation on other supports, on whose roller is rolled and developed the curtain, but remaining firmly attached to it, presenting this last, on its opposite edge, a linear reinforcement, characterized in that one of said fixed supports has a housing facing the roller, provided with radial expansions intended to receive analogous lugs that extend radially from a piece in box, with bottom that is placed in contact with that of said housing, and devoid of the opposite base, although the bottom in question and the bottom of the housing have matching holes for the passage of the part of turning spindle, serving these matching means for locating and immobilizing the box in the housing, said box further serving for waxing a spring torsion, all of which is closed with a discoidal cover, said torsion spring being held at one end to the box in question and having at the other end a hooking configuration that cooperates with a tooth formed in a piece associated with the stump of that side of the roller, the latter being a hollow, internally threaded bushing, which is held in place by external thread of the trunnion repeatedly mentioned, all in such a way that, when extending the curtain, the rotation of the roller always pulls the spring causing its twist , while the rotation in the opposite direction of the roller, as a consequence of its inertia once released by the return produced by the spring, does not drag the latter. (Machine-translation by Google Translate, not legally binding)