Roller curtain device
AssigneeDynaco International S.A.
InventorBenoit Coenraets
Life of this patent
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Abstract
The invention relates to a curtain device mounted on a shaft (2) about which said curtain (1) can be wound to an open position and unwound into a closed position, a drive wheel (7) fixed coaxially to said shaft (2) and cooperating with said curtain (1) such as to displace the latter between said two positions. The device comprises an oblong flexible control body (11), cooperating with the drive wheel (7), said body (11) being embodied to permit the displacement of the curtain (1) between the open position and the closed position thereof, independently of the slack formed in the curtain (1) and to be able to be displaced along at least one of the lateral edges (4) of the curtain (1) and act upon the region (8) of the latter as opposed to that arranged on the shaft (2).
Claims15
A curtain device mounted on a shaft (2) around which the curtain (1) may be wound toward an open position and from which it can be unwound toward a closed position, a drive wheel (7) secured coaxially on the shaft (2) and cooperating with the curtain (1) in such a manner so as to move the latter between these two positions, wherein the device comprises a flexible oblong control element (11) that cooperates with the drive wheel (7), said control element (11) being mounted freely in relation to the curtain in such a manner to allow the curtain (1) to be moved between an open position and a closed position independently of slack which may form in the curtain (1), on the one hand, and to be able to move along at least one of the side edges (4) of the curtain (1) and act on the zone (8) of the latter opposite that mounted on the shaft (2), on the other hand, wherein the pitch diameter of the drive wheel (7) is less than the diameter of the wound portion of the curtain (1) in its open position, and is greater than the diameter of the aforementioned shaft (2) or the wound portion of the curtain (1) in its closed position.
A curtain device mounted on a shaft (2) around which the curtain (1) may be wound toward an open position and from which it can be unwound toward a closed position, a drive wheel (7) secured coaxially on the shaft (2) and cooperating with the curtain (1) in such a manner so as to move the latter between these two positions, wherein the device comprises a flexible oblong control element (11) that cooperates with the drive wheel (7), said control element (11) being mounted freely in relation to the curtain in such a manner to allow the curtain (1) to be moved between its open position and its closed position independently of the slack which may form in the curtain (1), on the one hand, and to be able to move along at least one of the side edges (4) of the curtain (1) and act on the zone (8) of the latter opposite that mounted on the shaft (2), on the other hand, wherein the drive wheel (7) is such that the control element (11) can be wound spirally on it around its axis of rotation.
Dependencies are inferred from the claim text.