Hard panels formed from a wood-based material and having a decorative layer for floor coverings are provided, at least on two opposite edges, with coupling devices made in one piece with the panels wherein similar panels may be coupled together to form a floor covering, wherein these coupling device
Hard panels formed from a wood-based material and having a decorative layer for floor coverings are provided, at least on two opposite edges, with coupling devices made in one piece with the panels wherein similar panels may be coupled together to form a floor covering, wherein these coupling devices provide for an interlocking in a direction perpendicular to the plane of coupled panels, as well as in a direction perpendicular to the edges concerned and parallel to the plane of coupled panels. These coupling devices are constituted of a tongue and a groove. The top side of the tongue has a protrusion that cooperates with a meshing recess located in the lower side of the upper lip of the groove of the coupling devices, and a portion extending generally parallel with the plane of the panel to form a contact surface cooperating with the lower side of the upper lip of the groove.
대표청구항▼
1. A floor panel for forming a floor covering, wherein the floor panel is a laminate floor panel made of a board made from wood, upon which one or several layers, including a decorative layer, are provided; wherein the floor panel is provided, at least at two opposite edges, with coupling parts made
1. A floor panel for forming a floor covering, wherein the floor panel is a laminate floor panel made of a board made from wood, upon which one or several layers, including a decorative layer, are provided; wherein the floor panel is provided, at least at two opposite edges, with coupling parts made in one piece with the floor panel, as a result of which several of such floor panels can be mutually coupled to one another, wherein said coupling parts, in a coupled situation, provide for an interlocking in a direction perpendicular to a plane of the floor covering, as well as in a direction perpendicular to the edges concerned and parallel to the plane of the floor covering, wherein said coupling parts comprise a tongue and a groove, said groove being bordered by an upper lip and a lower lip, the distal end of the upper lip defining a first vertical plane, and said lower lip extending further than the distal end of the upper lip;wherein said coupling parts comprise first cooperating surfaces, on the top side of the tongue and the bottom side of the upper lip respectively, said first cooperating surfaces, in the coupled situation, working in conjunction with one another and forming a first cooperating zone, and second cooperating surfaces, on an interlocking part that is situated on the lower lip, past the distal end of the upper lip, and on an opposite part of the other floor panel respectively, said second cooperating surfaces, in the coupled situation, working in conjunction with one another and forming a second cooperating zone;wherein the top side of said interlocking part defines a first horizontal level, said first horizontal level intersecting the edge with the groove at a point being situated proximally from said first vertical plane, with respect to the edge with the groove;wherein said first cooperating zone is situated above the first horizontal level; andwherein the distance between the first vertical plane and the distal end of the lower lip, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is larger than the distance between the upper side of the floor panel and the intersection point between the first vertical plane and the top side of the lower lip, measured along a direction perpendicular to the plane of the floor covering. 2. The floor panel of claim 1, wherein the center of said second cooperating zone defines a second vertical plane; and wherein the distance between the first and second vertical planes, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is larger than the distance between the upper side of the floor panel and the intersection point between the first vertical plane and the top side of the lower lip, measured along a direction perpendicular to the plane of the floor covering. 3. The floor panel of claim 1, wherein said cooperating surfaces forming the second cooperating zone, or a tangent line thereof, are directed slantingly in relation to the plane of the floor covering. 4. The floor panel of claim 1, wherein said coupling parts are made such that said coupling parts can be turned in one another by means of a movement of rotation. 5. The floor panel of claim 4, wherein said cooperating surfaces forming the second cooperating zone, or tangent line thereof, extend in a direction which deviates from the direction of the tangent onto a circle, whose center is situated on a point of rotation around which the floor panels can be turned into one another, such that a snap-in effect is created when the floor panels are rotated into one another, wherein said direction of the cooperating surfaces deviates 30 degrees at the most from the direction of the tangent of said circle. 6. The floor panel of claim 1, wherein said interlocking part is situated near the free end of said lower lip. 7. The floor panel of claim 6, wherein, in the coupled situation, the free end of said lower lip is spaced from the opposite edge of the other floor panel. 8. The floor panel of claim 1, wherein said floor panel is made from fiberboard of either MDF or HDF. 9. The floor panel of claim 8, wherein said decorative layer is selected from a group consisting of: a printed paper layer, a layer of wood, a veneer layer and a cork layer. 10. The floor panel of claim 1, wherein said decorative layer is selected from group consisting of: a layer of wood, a veneer layer and a cork layer. 11. The floor panel of claim 1, wherein the floor panel is rectangular, said floor panel comprising a first pair of opposite edges, formed by the aforementioned two opposite edges, and a second pair of opposite edges, which is also provided with coupling parts. 12. The floor panel of claim 11, wherein said coupling parts at the second pair of opposite edges offer an interlocking in the horizontal and vertical direction. 13. A floor panel for forming a floor covering, wherein the floor panel is a laminate floor panel made of a board made from wood, upon which one or several layers, including a decorative layer, are provided; wherein the floor panel is provided, at least at two opposite edges, with coupling parts made in one piece with the floor panel, as a result of which several of such floor panels can be mutually coupled to one another, wherein said coupling parts, in a coupled situation, provide for an interlocking in a direction perpendicular to a plane of the floor covering, as well as in a direction perpendicular to the edges concerned and parallel to the plane of the floor covering, wherein said coupling parts comprise a tongue and a groove, said groove being bordered by an upper lip and a lower lip, the distal end of the upper lip defining a first vertical plane, and said lower lip extending further than the distal end of the upper lip;wherein said coupling parts comprise first cooperating surfaces, on the top side of the tongue and the bottom side of the upper lip respectively, said first cooperating surfaces, in the coupled situation, working in conjunction with one another and forming a first cooperating zone, and second cooperating surfaces, on an interlocking part that is situated on the lower lip, past the distal end of the upper lip, and on an opposite part of the other floor panel respectively, said second cooperating surfaces, in the coupled situation, working in conjunction with one another and forming a second cooperating zone;wherein the top side of said interlocking part defines a first horizontal level; wherein the bottom side of the part upon which the tongue is provided and which extends from the tip of the tongue to said second cooperating zone defines a second horizontal level; wherein the first and second horizontal levels define a third horizontal level situated right therebetween;wherein an average height of the first cooperating zone defines a fourth horizontal level;wherein the tip of the tongue defines a second vertical plane;wherein the top side of the lower lip, proximally from said interlocking part with respect to the edge with the groove, is free from contact zones being situated below said third horizontal level;wherein the distance between the first vertical plane and the second vertical plane, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is larger than the distance between said fourth horizontal level and the intersection point between the first vertical plane and the top side of the lower lip, measured along a direction perpendicular to the plane of the floor covering; andwherein the distance between the first vertical plane and the distal end of the lower lip, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is larger than the distance between the upper side of the floor panel and the intersection point between the first vertical plane and the top side of the lower lip, measured along a direction perpendicular to the plane of the floor covering. 14. The floor panel of claim 13, wherein the center of said second cooperating zone defines a third vertical plane; and wherein the distance between the first and third vertical planes, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is larger than the distance between the upper side of the floor panel and the intersection point between the first vertical plane and the top side of the lower lip, measured along a direction perpendicular to the plane of the floor covering. 15. The floor panel of claim 13, wherein said cooperating surfaces forming the second cooperating zone, or a tangent line thereof, are directed slantingly in relation to the plane of the floor covering. 16. The floor panel of claim 13, wherein said coupling parts are made such that the coupling parts can be turned in one another by means of a movement of rotation. 17. The floor panel of claim 16, wherein said cooperating surfaces forming the second cooperating zone, or a tangent line thereof, extend in a direction which deviates from the direction of the tangent onto a circle, whose center is situated on a point of rotation around which the floor panels can be turned into one another, such that a snap-in effect is created when the floor panels are rotated into one another, wherein said direction of the cooperating surfaces deviates 30 degrees at the most from the direction of the tangent of said circle. 18. The floor panel of claim 13, wherein the distance between the first vertical plane and the distal end of the lower lip, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is at least twice as large as the distance between the first vertical plane and the second vertical plane, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges. 19. The floor panel of claim 13, wherein said floor panel is made from fiberboard either MDF or HDF. 20. The floor panel of claim 19, wherein said decorative layer is selected from a group consisting of: a printed paper layer, a layer of wood, a veneer layer and a cork layer. 21. The floor panel of claim 13, wherein said decorative layer is selected from a group consisting of: a layer of wood, a veneer layer and a cork layer. 22. The floor panel of claim 13, wherein the floor panel is rectangular, said floor panel comprising a first pair of opposite edges, formed by the aforementioned two opposite edges, and a second pair of opposite edges, which is also provided with coupling parts. 23. The floor panel of claim 22, wherein said coupling parts at the second pair of opposite edges offer an interlocking in the horizontal and vertical direction. 24. A floor panel for forming a floor covering, wherein the floor panel is a laminate floor panel made of a board made from wood, upon which one or several layers, including a decorative layer, are provided; wherein the floor panel is provided, at least at two opposite edges, with coupling parts made in one piece with the floor panel, as a result of which several of such floor panels can be mutually coupled to one another, wherein said coupling parts, in a coupled situation, provide for an interlocking in a direction perpendicular to a plane of the floor covering, as well as in a direction perpendicular to the edges concerned and parallel to the plane of the floor covering, wherein said coupling parts comprise a tongue and a groove, said groove being bordered by an upper lip and a lower lip, the distal end of the upper lip defining a first vertical plane, and said lower lip extending further than the distal end of the upper lip;wherein said coupling parts comprise first cooperating surfaces, on the top side of the tongue and the bottom side of the upper lip respectively, said first cooperating surfaces, in the coupled situation, working in conjunction with one another and forming a first cooperating zone, and second cooperating surfaces, on an interlocking part that is situated on the lower lip, past the distal end of the upper lip, and on an opposite part of the other floor panel respectively, said second cooperating surfaces, in the coupled situation, working in conjunction with one another and forming a second cooperating zone;wherein the top side of said interlocking part defines a first horizontal level; wherein the bottom side of the part upon which the tongue is provided and which extends from the tip of the tongue to said second cooperating zone defines a second horizontal level; wherein the first and second horizontal levels define a third horizontal level situated right therebetween;wherein the top side of the lower lip, proximally from said interlocking part with respect to the edge with the groove, is free from contact zones being situated below said third horizontal level;wherein said first cooperating zone is inclined with respect to the plane of the floor covering and runs downwardly in the direction of the tip of the tongue; andwherein the distance between the first vertical plane and the distal end of the lower lip, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is larger than the distance between the upper side of the floor panel and the intersection point between the first vertical plane and the top side of the lower lip, measured along a direction perpendicular to the plane of the floor covering. 25. The floor panel of claim 24, wherein the center of said second cooperating zone defines a second vertical plane; and wherein the distance between the first and second vertical planes, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is larger than the distance between the upper side of the floor panel and the intersection point between the first vertical plane and the top side of the lower lip, measured along a direction perpendicular to the plane of the floor covering. 26. The floor panel of claim 24, wherein the tip of the tongue defines a third vertical plane; wherein the distance between the first vertical plane and the distal end of the lower lip, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges, is at least twice as large as the distance between the first vertical plane and the third vertical plane, measured along a direction parallel to the plane of the floor covering and perpendicular to the edges. 27. The floor panel of claim 24, wherein said coupling parts are made such that the coupling parts can be turned in one another by means of a movement of rotation. 28. The floor panel of claim 24, wherein said floor panel is made from either MDF or HDF. 29. The floor panel of claim 28, wherein said decorative layer is selected from a group consisting of: a printed paper layer, a layer of wood, a veneer layer and a cork layer. 30. The floor panel of claim 24, wherein said decorative layer is selected from group consisting of: a layer of wood, a veneer layer and a cork layer.
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