Patent ID: 8627631

Claim:
Floor panel, for forming a decorative floor covering, the floor panel being made of synthetic material, and defining two pairs of opposite edges; the first pair of opposite edges including first coupling means, as a result of which several of such panels can be mutually coupled to one another, the first coupling means providing for an interlocking in a direction perpendicular to the plane of the floor covering, as well as in a direction perpendicular to the edges concerned, and parallel to the plane of the floor panel; the second pair of opposite edges including second coupling means made in one piece with the panels, as a result of which several of such panels can be mutually coupled to one another, the second coupling means providing for an interlocking in a direction perpendicular to the plane of the floor covering, as well as in a direction perpendicular to the edges concerned, and parallel to the plane of the floor panel, said second coupling means comprising a tongue and a groove, said groove being bordered by an upper lip and a lower lip, and said second coupling means including coupling parts providing for the interlocking in the horizontal direction; wherein said upper lip has a distal end and said lower lip extends beyond the distal end of the upper lip; wherein the second coupling means are configured for allowing assembly of two of such panels by means of a movement of rotation of one panel in respect to the other; and wherein the second coupling means are configured such that in the coupled condition of two of such panels a free space exists under the tongue, said free space extending as of the tip of the tongue up to at least a location at the underside of the tongue that is located beyond the distal end of the upper lip.