Abstract: It is a platform fit to be disposed over the water mass retained in a swimming pool, or the like, and to act as a receiving platform for a person, placed on same, to be able to enter into and submerge in the water as a consequence of the vertical descending movements, and then emerge by means of the ascent produced by the same platform in said water mass. The novelty is that said submergible platform is a hollow, light and rigid vessel that has a top horizontal floor, from which lateral walls are projected are facing downwards (when situated in the water), defining an internal precinct that remains in communication with the exterior by means of, at least, one air entry and exit conduit produced by the said ascending and descending movements of said platform in the water mass; said movements being guided by vertical guides disposed adjacently to the internal face of the swimming pool wall, along which the corresponding sliding carts projecting from the platform are driven.

Abstract: Pneumatic vacuum lift elevator, in which the vertical shaft is a tube with smooth interior surface, preferably cylindrical, with straight axle, and the transport cab or vehicle moving inside such tube is a piston with vertical movement, with minimum play inside the tube, equipped with air suction devices at the upper end of the tube, capable of causing a sufficient pressure differential to displace such piston in controlled ascending and descending movement; completed with an air entry or intake in the lower end of the tube, and the access doors with which the tube is equipped, and which are hermetically closed on the various stopping levels.

Abstract: Pneumatic vacuum lift elevator, in which the vertical shaft is a tube with smooth interior surface, preferably cylindrical, with straight axle, and the transport cab or vehicle moving inside such tube is a piston with vertical movement, with minimum play inside the tube, equipped with air suction devices at the upper end of the tube, capable of causing a sufficient pressure differential to displace such piston in controlled ascending and descending movement; completed with an air entry or intake in the lower end of the tube, and the access doors with which the tube is equipped, and which are hermetically closed on the various stopping levels.