Patent ID: 8650826
Filing Date: 2014-02-18
Classification: E04F

Abstract:
1. Building panels provided with a locking system for vertical locking of a first building panel and a second building panel by a vertical displacement of the panels relative each other, the panels comprising: a sidewardly open tongue groove provided at an edge of the first building panel, and a strip protruding below the tongue groove and outwardly beyond an upper part of the edge of said first building panel, the strip comprising a locking element configured to cooperate with a downwardly open locking groove formed on the second building panel, for locking of the first and the second building panels in a horizontal direction; a displaceable tongue provided in a sidewardly open displacement groove, the sidewardly open displacement groove in an edge of the second building panel and the sidewardly open displacement groove extends vertically above a top of the locking groove, the displaceable tongue comprises a main body extending along the edge of the second panel and a tongue locking surface located at an upper and outer part of the tongue, the tongue locking surface cooperating for vertical locking with a groove locking surface of the tongue groove; the displaceable tongue comprises an inner part spaced inwardly from an upper part of the edge of said second panel; the inner part comprises a tongue pressing surface configured to cooperate with a strip pressing surface on the strip, such that the displaceable tongue is displaced into the tongue groove when the tongue pressing surface and the strip pressing surface are displaced vertically against each other to obtain a locking of the first and the second building panel in a vertical direction.