Floor panels with edge connectors

1. A floor covering panel comprising:

an upper side and an under side;

said panel formed as a hard laminated assembly including a wood-base core comprising a ground wood product and a binding agent unified to form a cured composite;

at least one decorative layer on the upper side of the panel and a backing layer on the underside of the panel;

said panel having at least one pair of opposed side edges including coupling parts formed to cooperate with each other to couple similar panels along mutual side edges when brought together;

said coupling parts comprising substantially a tongue, a groove and mechanical locking elements all formed in one piece with the core of the panel;

said locking elements arranged so that they prevent the drifting apart of coupled panels in a direction perpendicular to the mutual edges along which the panels are coupled and in a direction perpendicular to said mutual edges and parallel to a plane including coupled panels;

said mechanical locking elements comprising at least a first upper surface portion of said tongue extending toward said panel upper side, and a portion of an upper wall of said groove formed to cooperate in locking relationship in a direction perpendicular to the mutual edges along which the panels may be coupled with at least a portion of the first upper surface portion of said tongue when similar panels are coupled and said tongue including a second upper surface portion disposed at a distal upper end of the tongue, said second upper surface portion comprising a planar surface sloping away from said panel upper side in a distal direction of the tongue.

2. The floor covering panel according to claim 1 , wherein the panel includes two opposed pairs of side edges, all of said side edges including a coupling part, with opposed edges having one of a tongue and a groove but not both a tongue or a groove.

3. A floor covering panel comprising:

an upper side and an under side;

said panel formed as a hard laminated assembly including a wood-base core comprising a ground wood product and a binding agent unified to form a cured composite;

at least one decorative layer on the upper side of the panel and a backing layer on the underside of the panel;

said panel having at least one pair of opposed side edges including coupling parts formed to cooperate with each other to couple similar panels along mutual side edges when brought together;

said coupling parts comprising substantially a tongue, a groove and mechanical locking elements all formed in one piece with the core of the panel;

said locking elements arranged so that they prevent the drifting apart of coupled panels in a direction perpendicular to the mutual edges along which the panels are coupled and in a direction perpendicular to said mutual edges and parallel to a plane including coupled panels;

said mechanical locking elements comprising at least a first upper surface portion of said tongue extending toward said panel upper side, and a portion of an upper wall of said groove formed to cooperate in locking relationship in a direction perpendicular to the mutual edges along which the panels may be coupled with at least a portion of the first upper surface portion of said tongue when similar panels are coupled and said tongue including a second upper surface portion disposed at a distal upper end of the tongue, said second upper surface portion comprising a planar surface sloping away from said panel upper side in a distal direction of the tongue;

wherein said first upper surface portion of said tongue and said cooperating upper wall portion of said groove are arcuately curved.

4. The floor covering panel according to claim 3 , wherein the arcuate curvature is a circular segment.

5. The floor covering panel according to claim 1 , wherein the coupling parts are configured to couple similar panels together without play.

6. The floor covering panel according to claim 5 , wherein the panel includes two opposed pairs of side edges, all of said side edges including a coupling part, with opposed edges having one of a tongue and a groove but not both a tongue or a groove.

7. The floor covering panel according to claim 5 , wherein the coupling parts are configured to couple similar panels together without play.

8. A floor covering panel comprising:

an upper side and an underside;

said panel formed as a hard laminated assembly including a wood-base core made of a material selected from the group consisting of MDF and HDF;

at least one decorative layer on the upper side of the panel and a backing layer on the underside of the panel;

said panel having at least one pair of opposed side edges including coupling parts formed to cooperate with each other to couple similar panels along mutual side edges when brought together;

said coupling parts comprising substantially a tongue, a groove and mechanical locking elements all formed in one piece with the core of the panel;

said locking elements arranged so that they prevent the drifting apart of coupled panels in a direction perpendicular to the mutual edges along which the panels are coupled and in a direction perpendicular to said mutual edges and parallel to a plane including coupled panels;

said mechanical locking elements comprising at least a first upper surface portion of said tongue extending toward said panel upper side, and a portion of an upper wall of said groove formed to cooperate in locking relationship in a direction perpendicular to the mutual edges along which the panels may be coupled with at least a portion of the first upper surface portion of said tongue when similar panels are coupled;

said locking elements formed at exposed side edges of the core material and being entirely located between said decorative and backing layers and not intersecting either of said decorative and backing layers.