Patent ID: 8973331
Filing Date: 2015-03-10
Classification: E04B,E04C,E04F

Abstract:
1. Building panels provided with a mechanical locking system comprising a tongue, at an edge of a first panel, cooperating with a tongue groove, at an edge of an adjacent second panel, for vertical locking of the building panels, wherein the edge of the first panel is provided with a displacement groove to obtain a resilient and displaceable tongue part, said displacement groove is downwardly open, and comprises an inner wall, an outer wall and an upper wall, and said displaceable tongue part includes an inner wall facing the displacement groove, wherein the tongue is formed out of the edge of the first panel, wherein the resilient and displaceable part of the tongue is configured to be displaced partly into the displacement groove by a lower lip of the tongue groove during assembling of the first and the second panel by a vertical displacement of the second panel toward the first panel, such that the inner wall of the displaceable part of the tongue is displaced in an essentially horizontal direction by translational movement, wherein the thickness of the outer wall of the displacement groove at a first and upper part of the displacement groove, above the upper surface of the tongue, is configured such that the resilient and displaceable tongue part is obtained, and wherein the thickness of the outer wall of the displacement groove at a second part of the displacement groove, below the resilient and displaceable part of the tongue, is configured such that the resilient and displaceable tongue part is obtained.