Floor panels with edge connectors

1. A floor panel, for forming a floor covering,

said floor panel having a panel thickness in a range of 5 to 15 mm;

said floor panel comprising a core material selected from the group consisting of medium density fiberboard and high density fiberboard;

said floor panel at least at two opposite sides including side edges provided with coupling parts substantially formed as a tongue and a groove, said groove being bordered by an upper lip and a lower lip, wherein the coupling parts are configured to enable two of such panels to be coupled to each other;

wherein said lower lip extends beyond said upper lip;

wherein the coupling parts are provided with integrated mechanical locking elements which prevent drifting apart of two coupled floor panels in a direction perpendicular to the related edges and parallel to an underside of the coupled floor panels;

wherein said locking elements comprise a recess in said lower lip and a protrusion at a lower side of said tongue, whereby in coupled condition of two of such panels the protrusion of one of said panels cooperates with the recess of the other panel;

wherein said coupling parts and said locking elements are formed in one piece from said core material;

wherein said locking elements comprise contact surfaces, defining a locking surface at a lower side of the tongue and a locking surface at an upper side of the lower lip, so that upon coupling two panels to each other, the respective locking surfaces cooperate with each other;

wherein said coupling parts and said locking elements are configured so as to enable two of said panels to be joined by turning one panel into the other; and

wherein at least adjacent one of the locking surfaces there is provided a rounding for facilitating engagement of said locking surfaces behind each other when coupling two of said floor panels; and

wherein the coupling parts and locking elements are configured so as to enable coupling of two of such panels in a manner free from play.

2. The floor panel of claim 1 , wherein a rounding is at least provided adjacent the locking element of the tongue, said rounding being located adjacent a lower side of said locking element of the tongue.

3. The floor panel of claim 2 , wherein said locking surface provided at the upper side of the lower lip is located in a portion of said lower lip which extends beyond said upper lip.

4. The floor panel of claim 3 , wherein the lower lip extends beyond the upper lip by a distance, measured in a principal plane of the floor panel, that is smaller than the thickness of the floor panel.

5. The floor panel of claim 3 , wherein said contact surfaces acting as locking surfaces are configured in such a manner that a tangent line which is defined by said contact surfaces when the panels are coupled forms an oblique angle with an underside of the floor panels which is smaller than 90 degrees.

6. The floor panel of claim 1 , wherein a rounding is at least provided adjacent the locking element of the lower lip, said rounding being located adjacent an upper side of said locking element of the lower lip.

7. The floor panel of claim 6 , wherein said lower lip extends beyond said upper lip and wherein said locking surface provided at the groove is located in a portion of said lower lip which extends beyond said upper lip.

8. The floor panel of claim 6 , wherein the lower lip extends beyond the upper lip by a distance, measured in a principal plane of the floor panel, that is smaller than the thickness of the floor panel.

9. The floor panel of claim 6 , wherein said contact surfaces acting as locking surfaces are configured in such a manner that a tangent line which is defined by said contact surfaces when the panels are coupled forms an oblique angle with the underside of the floor panels which is smaller than 90 degrees.

10. The floor panel of claim 1 , wherein said floor panel is a laminated floor panel comprising a resin impregnated imprinted decor layer.

11. A floor panel, for forming a floor covering,

said floor panel having a panel thickness in a range of 5 to 15 mm;

said floor panel comprising a core material selected from the group consisting of medium density fiberboard and high density fiberboard;

said floor panel at least at two opposite sides including side edges provided with coupling parts substantially formed as a tongue and a groove, said groove being bordered by an upper lip and a lower lip, wherein the coupling parts are configured to enable two of such panels to be coupled to each other;

wherein said lower lip extends beyond said upper lip;

wherein the coupling parts are provided with integrated mechanical locking elements which prevent drifting apart of two coupled floor panels in a direction perpendicular to the related edges and parallel to an underside of the coupled floor panels;

wherein said locking elements comprise a recess in said lower lip and a protrusion at a lower side of said tongue, whereby in coupled condition of two of such panels the protrusion of one of said panels cooperates with the recess of the other panel;

wherein said coupling parts and said locking elements are formed in one piece from said core material;

wherein said locking elements comprise contact surfaces, defining a locking surface at a lower side of the tongue and a locking surface at an upper side of the lower lip, so that upon coupling two panels to each other, the respective locking surfaces cooperate with each other;

wherein said coupling parts and said locking elements are configured to enable two of said panels to be coupled by turning one panel into the other; and

wherein at least adjacent one of the locking surfaces there is provided a rounding for facilitating the engagement of said locking surfaces behind each other when coupling two of said floor panels;

wherein said rounding is at least provided adjacent the locking surface of the locking element of the tongue, said rounding being located adjacent a lower side of said locking surface of the tongue;

wherein said lower lip extends beyond said upper lip and wherein said locking surface provided at the groove is located in a portion of said lower lip which extends beyond said upper lip; and

wherein said contact surfaces acting as locking surfaces are shaped as flat contact planes.

12. A floor panel, for forming a floor covering,

said floor panel having a panel thickness in a range of 5 to 15 mm;

said floor panel comprising a core material selected from the group consisting of medium density fiberboard and high density fiberboard;

said floor panel at least at of two opposite sides including edges provided with coupling parts substantially formed as a tongue and a groove, said groove being bordered by an upper lip and a lower lip, wherein the coupling parts are configured to enable two of such panels to be coupled to each other;

wherein said lower lip extends beyond said upper lip;

wherein the coupling parts are provided with integrated mechanical locking elements which prevent the drifting apart of two coupled floor panels in a direction perpendicular to the related edges and parallel to an underside of the coupled floor panels;

wherein said locking elements comprise a recess in said lower lip and a protrusion at a lower side of said tongue, whereby in coupled condition of two of such panels the protrusion of one of said panels cooperates with the recess of the other panel;

wherein said coupling parts and said locking elements are formed in one piece from said core material;

wherein said locking elements comprise contact surfaces, defining a locking surface at a lower side of the tongue and a locking surface at an upper side of the lower lip, so that upon coupling two panels to each other, the respective locking surfaces cooperate with each other;

wherein said coupling parts and said locking elements are configured to enable two of said panels to be joined by turning one panel into the other; and

wherein at least adjacent one of the locking surfaces there is provided a rounding for facilitating the engagement of said locking surfaces behind each other when coupling two of said floor panels;

wherein said rounding is at least provided adjacent the locking element of the lower lip, said rounding being located adjacent an upper side of said locking element; and

wherein said contact surfaces acting as locking surfaces are shaped as flat contact planes.

13. A floor panel, for forming a floor covering,

said floor panel having a panel thickness in a the range of 5 to 15 mm;

said floor panel comprising a core material selected from the group consisting of medium density fiberboard and high density fiberboard;

said floor panel at least at the edges of two opposite sides including side edges provided with coupling parts substantially formed as a tongue and a groove, said groove being bordered by an upper lip and a lower lip, wherein the coupling parts are configured to enable two of such panels to be coupled to each other;

wherein said lower lip extends beyond said upper lip;

wherein the coupling parts are provided with integrated mechanical locking elements which prevent drifting apart of two coupled floor panels in a direction perpendicular to the related edges and parallel to an underside of the coupled floor panels;

wherein said locking elements comprise a recess in said lower lip and a protrusion at a lower side of said tongue, whereby in coupled condition of two of such panels the protrusion of one of said panels cooperates with the recess of the other panel;

wherein said coupling parts and said locking elements are formed in one piece from said core material;

wherein said locking elements comprise flat plane contact surfaces, defining a locking surface at a lower side of the tongue and a locking surface at an upper side of the lower lip, so that upon coupling two panels to each other, the respective locking surfaces cooperate with each other;

wherein said coupling parts and said locking elements are configured to enable two of said panels to be joined by turning one panel into the other; and

wherein at least adjacent one of the locking surfaces there is provided a rounding for facilitating the engagement of said locking surfaces behind each other when coupling two of said floor panels.