Patent ID: 8418279

Claim:
A device for covering a surface comprising: (a) a rotatably-mounted drum capable of winding up or unwinding a cover, said drum being mounted on a longitudinal-translation mechanism comprising rails each consisting of a section piece having an outward opening on one of its faces and placed on either side of said surface; (b) a system for attaching said cover to one transverse end of the surface so that the translation and the rotation of the drum cause the cover to unwind/wind up above the surface to be covered; (c) a system for the continuous locking of the longitudinal edges of the cover in the opening of said rails engaging progressively as it unwinds and disengaging progressively as it winds up again, characterized in that, in said continuous locking system: (i) at least one of said rails comprises flanges partially closing said opening on either side; (ii) said covering comprises at least one section piece protruding from the plane defined by the latter and extending along at least one of its longitudinal edges, at a certain distance from said edge thus forming a lip; (iii) engagement means are provided making it possible to engage said section piece in the opening formed by the flanges of the rail so that the cover is locked to the rail when it unwinds.