Patent ID: 7721503

Claim:
A locking system for a floor panel comprising: a first connecting device comprising an integrated combination lock at a first edge of a first floor panel, the combination lock configured to connect the first floor panel to a another floor panel, so that upper joint edges of the floor panels in the connected state define a vertical plane, the combination lock comprising a flexible tongue in a displacement groove, the flexible tongue configured to cooperate with a tongue groove of a second connecting device at the edge of a second floor panel for connecting the first and the second floor panel together in a vertical direction parallel to the vertical plane, and the displacement groove and the flexible tongue of the combination lock are configured to cooperate with a tongue of a third connecting device at the edge of a third panel, for connecting the first panel and the third panels in the vertical direction parallel to the vertical plane, the flexible tongue being displaceable via the tongue of the third panel and positioned, in a connected position of the first and the third panel, via the tongue inside the joint edge of the first panel and inside the displacement groove.