Patent ID: 8769905
Filing Date: 2014-07-08
Classification: E04F

Abstract:
1. Building panels including at least a first building panel and a second building panel that are provided with a locking system for vertical locking of the first building panel and the second building panel by a vertical displacement of the first and second building panels relative each other, the locking system comprising a displaceable tongue attached into a sidewardly open displacement groove provided at an edge of the first building panel, said displaceable tongue cooperates with a tongue groove provided at an adjacent edge of the second building panel for locking the edge and the adjacent edge vertically, and the locking system further comprising a strip that protrudes from the edge or the adjacent edge: below the displacement groove and outwardly beyond an upper part of the edge; or below the tongue groove and outwardly beyond an upper part of the adjacent edge, wherein the displaceable tongue comprises a main tongue body extending along the edge of the first building panel and separate flexible spring parts that are detachably attached to the main tongue body, and the separate spring parts are located in an inner part of the displacement groove and spaced from each other in an length direction of the main tongue body.