Patent ID: 6530177
Filing Date: 2003-03-11
Classification: E05F,E05Y,F16G,F16H

Abstract:
An operator for opening and closing a door or a window having frame and sash structures, the door or window being movable from an open or closed position in an opening or closing direction, the operator comprisinga motor-driven double-chain operator with two chain members (21, 22), both flexible in one direction only, said chain members being accommodated in the closed position of the door or the window, in a substantially closed operator housing, in which the chain members (21, 22) are individually in engagement with a rotating drive member (11, 12) in communication with outlet openings (5, 7) for the chain members, and separate chain paths (3, 6) connected therewith, from which the chain members (21, 22) may be joined in a back-to-back arrangement for the provision of a joined operator member, each of the two chain members (21, 22) being composed of chain links (18) having hinge parts (19, 20) with parallel rotational axes (25, 26) oriented transversely to a direction of propagation of the respective chain member in the associated chain path in the operator housing for engagement with neighbouring chain links in the respective chain member, the chain links of each of the chain members having back surfaces (27) provided with engagement members (32) for engagement with corresponding engagement members on the back surfaces of adjacent chain links (18) in the other chain member for securing the chain members in the joined operator member against displacement transversely to the opening and closing directions, whereby the substantially closed operator housing and coupled free ends of the chain members are connected with profile members of the frame and sash structures of the door or the window, said profile members being positioned opposite one another and extending transversely to the opening and closing directions of the door or the window, characterized in that in each chain member (21, 22) the hinge parts (19, 20) of the chain links (18) are designed such that during propagation of the respective chain member (18) in the operator housing a mutual displacement is allowed between neighbouring chain links (18) in each chain member (21, 22) in a direction of the rotational axes (25, 26), and that the separate chain paths (3, 6) only in a part (2) of the housing extend in a plane (9) common with the outlet openings (5, 7).