| US 7,386,963 B2 | ||
| Locking system and flooring board | ||
| Darko Pervan, Viken (Sweden) | ||
| Assigned to Valinge Innovation AB, Viken (Sweden) | ||
| Filed on Feb. 03, 2005, as Appl. No. 10/906,109. | ||
| Application 10/906109 is a continuation in part of application No. 10/361815, filed on Feb. 11, 2003, granted, now 6,922,964. | ||
| Application 10/361815 is a continuation of application No. 10/100032, filed on Mar. 19, 2002, granted, now 6,532,709. | ||
| Application 10/100032 is a continuation of application No. 09/679300, filed on Oct. 06, 2000, granted, now 6,446,405. | ||
| Application 09/679300 is a continuation of application No. PCT/SE99/00934, filed on May 31, 1999. | ||
| Claims priority of application No. 9801986 (SE), filed on Jun. 03, 1998. | ||
| Prior Publication US 2005/0102937 A1, May 19, 2005 | ||
| Int. Cl. E04B 2/08 (2006.01) | ||
| U.S. Cl. 52—589.1 [52/794.1; 52/592.1; 52/578; 52/783.1] | 14 Claims |
| 1. A floorboard system comprising a plurality of rectangular laminated floorboards, each floorboard of the floorboard system
comprising:
a body;
a top layer on a first side of the body;
a balance layer on a rear side of the body, the rear side opposite the first side;
a plurality of edges of the body, the plurality of edges including a first long side, a second long side, a first short side,
and a second short side; and
a mechanical joining system, wherein the body and the mechanical joining system, integrally formed with the body, comprise
plywood with several layers;
wherein the mechanical joining system comprises a projection portion, projecting from a joint edge, the joint edge being a
plane perpendicular to the top layer at a point where the top layer ends;
wherein the number of plywood layers differs along a length of the projection portion.
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