Abstract: An assembly system for floor and/or wall tiles includes anchors between tiles arranged in a coplanar plane. The anchors are determined from portions curved in the shape of a groove located in the underside of the tiles and matching the side edges of the tiles that guide the curved portions to converge on the edges. When the tiles are put together next to each other head to head and at the point where the corners converge, these curved grooved portions form a channel on the underside of the tiles inside which male elements fit tightly in at least a portion of it to couple and engage at least two adjacent tiles.

Abstract: Includes anchoring means between tiles arranged in a coplanar plane. It is characterized in that the anchoring means are determined from portions curved in the shape of a groove located in the underside of the tiles and matching the side edges of the tiles that guide said curved portions to converge on said edges. When the tiles are put together next to each other head to head and at the point where the comers converge, these curved grooved portions form a channel on the underside of the tiles inside which male elements fit tightly in at least a portion of it to couple and engage at least two adjacent tiles.

Abstract: It permits tongue-and-groove connection of wooden or similar pieces (18) with a square or rectangular shape in linear or intermeshed composition of the pieces (18). It includes some projections (24) for connection located in two consecutive sides and there exist corresponding recesses (28) on the two sides opposite to the above. Both the projections (24) and the recesses (28) have a configuration in the form of an obtuse angle triangle, adopting an oblique arrangement in order to achieve the intermeshing and having inverted orientations for permitting the coupling between pieces (18) to be able to be done according to a simple diagonal movement of the new piece to lay. The recesses (28) and projections (24) are located in the lower third of the thickness of the piece (18), the first in a lower flange (29) and the second below a flange (25) of the central third of the thickness of the pieces (18). The visible face can be backed on to a ceramic tile or similar.