Building panels 1, 1 provided with a mechanical locking system including a tongue 30, at an edge of a first panel 1, cooperating with a tongue groove 20, at an edge of an adjacent second panel 1, for vertical locking of the building panels. The edge of the first panel is provided with a displacement groove 60, which is downwardly open, and includes an inner wall 61, an outer wall 62, and an upper wall 67. The tongue 30 is formed out of the edge of the first panel. A resilient and displaceable and part 66 of the tongue 30 is displaceable into the displacement groove 60.

Building panels, such as a floor panels or wall panels. The panels including a first mechanical locking system at respective parallel and opposite third and fourth edges, such as long edges, configured to cooperate for horizontal and vertical locking between two adjacent building panels, preferably by means of a folding motion. The panels further including a second locking system at respective parallel and opposite first and second edges, such as short edges, configured to cooperate for horizontal and vertical locking of two adjacent building panels. An upper edge portion of one of the third edge or fourth edge, preferably the third edge, includes a first lower lip portion configured to cooperate with a first upper lip portion of an upper edge portion of the other of the third and fourth edge of an adjacent panel when the third and fourth edges are arranged in locking engagement.

A first and a second pair of opposite edges with coupling parts, are arranged to provide locking in both the vertical and the horizontal direction. The panels may be coupled at least on one pair of edges by means of a downward motion. One edge comprises an upward-directed lower hook-shaped portion, including a lip with an upward-directed locking element that defines a female part proximally thereto; the opposite edge includes a downward-directed upper hook-shaped portion, which has a lip with a downward-directed locking element that defines a male part. In the coupled state, the distance between the underside of the downward directed locking element of the panel and the upper side of the lip of the lower hook-shaped portion of the panel coupled thereto is everywhere at least 0.05 mm.

A floor board including a decorative surface layer applied to a substrate, where the substrate is optionally MDF or HDF material at a side edge thereof, and at least one side edge together with a side edge opposite thereto forming a first pair of opposite side edges of said substrate. The first pair of opposite side edges includes mechanical first and second coupling parts, respectively, allowing the floor board to be coupled at the respective side edges with a similar floor board. Also, a floor board covering consisting of a plurality of the floor boards and a method for manufacturing such floor boards.

A panel has at least one first pair of opposite edges with coupling parts that allow two such panels to be couplable together. The coupling parts include a horizontally acting locking system that in a coupled state of two such panels achieves locking in the plane of the panels and perpendicular to the respective edges. The horizontally acting locking system includes a projecting lip with an upward directed locking element on the underside of the panel. The upward directed locking element abuts against the proximally located upper side of the aforementioned projecting lip at least by means of a concave surface.

Building panels 1, 1 provided with a mechanical locking system including a tongue 30, at an edge of a first panel 1, cooperating with a tongue groove 20, at an edge of an adjacent second panel 1, for vertical locking of the building panels. The edge of the first panel is provided with a displacement groove 60, which is downwardly open, and includes an inner wall 61, an outer wall 62, and an upper wall 67. The tongue 30 is formed out of the edge of the first panel. A resilient and displaceable and part 66 of the tongue 30 is displaceable into the displacement groove 60.

A floor board includes a board unit that includes a substrate and a coating unit. The substrate has a first side surface, a second side surface opposite to the first side surface, a male engaging part extending outwardly from the first side surface, and a female engaging part indented inwardly from the second side surface. The male engaging part corresponds in shape to the female engaging part. The coating unit is formed on the first and second side surfaces, and the male and female engaging parts, and includes a far-infrared radiating material.

A set of essentially identical panels, such as building panels, provided with a mechanical locking system including a displaceable tongue, which is arranged in a displacement groove with a first opening at a first edge of a first panel. The displaceable tongue is configured to cooperate with a first tongue groove, with a second opening at a second edge of an adjacent second panel, for vertical locking of the first and the second edge. The height of the first opening is greater than a second height of the second opening.

A panel for forming a covering, includes a first pair of opposite edges and a second pair of opposite edges. The first pair of opposite edges defines a first edge and a second edge of the panel. The second pair of opposite edges defines a third edge and a fourth edge of the panel. The first pair of opposite edges has coupling parts which make it possible for two such panels to be coupled to each other.

A set of panels each including a main surface, a first edge, an opposite second edge, a third edge which is adjacent to the first edge and a fourth edge which is opposite to the third edge. The set includes a mechanical locking device which is configured to lock the first edge to the second edge. The locking device includes a flexible tongue. The flexible tongue includes a central part configured to cooperate with a tongue groove for locking. A first edge part and the tongue groove are configured such that when in the locked position a force P is applied adjacent the first edge and the third edge of the first panel and another force P is applied adjacent the second edge and the third edge of the second panel, the first edge part is pushed towards a bottom surface of an insertion groove which allows a disassembling.